fix: update SDK for v0.2.0 API compatibility

Sync OpenAPI spec to v0.2.0, fix type annotation shadowing by using builtins.list in annotated signatures, guard poll interval lookup against None status, and reorder capsule ID assignment to validate before storing.
Merge branch 'bugfix/timeout-related-issues' into dev
2026-05-16 17:57:20 +06:00 · 2026-05-02 21:53:33 +06:00 · 2026-05-02 21:46:16 +06:00 · 2026-05-02 21:34:02 +06:00 · 2026-05-02 19:02:39 +06:00 · 2026-05-02 05:07:13 +06:00
48 changed files with 12422 additions and 3627 deletions
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@ -0,0 +1,24 @@
+name: Publish to PyPI
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  pypi-publish:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    environment: pypi
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: astral-sh/setup-uv@v6
+
+      - name: Build package
+        run: uv build
+
+      - name: Publish package distributions to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
--- a/.gitignore
+++ b/.gitignore
@ -175,3 +175,10 @@ cython_debug/
 .pypirc

 CODE_EXECUTION.md
+
+.opencode/
+# AI
+.code-review-graph/
+.claude
+.mcp.json
+AGENTS.md
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@ -0,0 +1,25 @@
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.15.10
+    hooks:
+      - id: ruff
+      - id: ruff-format
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.20.0
+    hooks:
+      - id: mypy
+        additional_dependencies:
+          - pydantic>=2.12.5
+          - httpx>=0.28.1
+          - httpx-ws>=0.9.0
+          - email-validator>=2.3.0
+
+  - repo: local
+    hooks:
+      - id: unit-tests
+        name: unit tests
+        entry: uv run pytest -m "not integration" -x -q
+        language: system
+        pass_filenames: false
+        always_run: true
--- a/.woodpecker/check.yml
+++ b/.woodpecker/check.yml
@ -1,46 +1,24 @@
 when:
-  event: push
+  event: pull_request
  branch:
    - main
    - dev
-
-variables:
-  - &python_image "ghcr.io/astral-sh/uv:python3.13-bookworm-slim"
-  - &uv_cache_dir "/root/.cache/uv"
+  path:
+    - "src/**"
+    - "tests/**"

 steps:
-  - name: restore-cache
-    image: woodpeckerci/plugin-cache
-    settings:
-      restore: true
-      cache_key: "uv-{{ checksum \"uv.lock\" }}"
-      mount:
-        - /root/.cache/uv
-
-  - name: lint
-    image: *python_image
-    environment:
-      UV_CACHE_DIR: *uv_cache_dir
-      UV_FROZEN: 1
+  unit-tests:
+    image: ghcr.io/astral-sh/uv:python3.13-bookworm
    commands:
-      - uv sync --no-install-project
-      - make lint
+      - uv sync --dev
+      - uv run pytest -m "not integration" -v

-  - name: test
-    image: *python_image
+  integration-tests:
+    image: ghcr.io/astral-sh/uv:python3.13-bookworm
    environment:
-      UV_CACHE_DIR: *uv_cache_dir
-      UV_FROZEN: 1
+      WRENN_API_KEY:
+        from_secret: WRENN_API_KEY
    commands:
-      - uv sync --no-install-project
-      - make test
-
-  - name: rebuild-cache
-    image: woodpeckerci/plugin-cache
-    when:
-      - status: [success]
-    settings:
-      rebuild: true
-      cache_key: "uv-{{ checksum \"uv.lock\" }}"
-      mount:
-        - /root/.cache/uv
+      - uv sync --dev
+      - uv run pytest -m integration -v
--- a/AGENTS.md
+++ b/AGENTS.md
@ -1,80 +0,0 @@
-# AGENTS.md
-
-## What this repo is
-
-Python SDK for **Wrenn** (microVM code execution platform). Communicates with the Control Plane via REST + WebSockets only — no gRPC. The `envd` and `HostAgentService` are internal to the Go backend and never reachable from this SDK.
-
-## Build & dev commands
-
-All commands go through `uv` and the `Makefile`. Never use raw `pip`, `venv`, or `python -m venv`.
-
-```bash
-make generate       # Fetch openapi.yaml → src/wrenn/models/_generated.py
-make lint           # ruff check + ruff format --check on src/
-make test           # runs ONLY tests/test_client.py
-make test-integration  # runs ALL tests (unit + integration, needs live server)
-make check          # lint + test (test_client.py only)
-```
-
-To run all unit tests (not just test_client.py):
-
-```bash
-uv run pytest tests/test_client.py tests/test_sandbox_features.py tests/test_filesystem_pty.py -v
-```
-
-To run a single test:
-
-```bash
-uv run pytest tests/test_client.py::TestAuth::test_signup -v
-```
-
-## Code generation (CRITICAL)
-
-Models in `src/wrenn/models/_generated.py` are generated by `datamodel-codegen` from `api/openapi.yaml`.
-
-1. **Never edit `_generated.py`** — overwritten on next `make generate`.
-2. All user-facing models must be re-exported in `src/wrenn/models/__init__.py` via `__all__`.
-3. To extend a generated model with custom methods, subclass it (e.g. `Sandbox` in `sandbox.py` subclasses the generated `SandboxModel`).
-
-## Dependency management
-
-```bash
-uv add <package>              # runtime dep
-uv add --dev <package>        # dev dep
-uv run <command>              # run in managed .venv
-```
-
-## Implemented resource namespaces
-
-Only these are currently implemented in `client.py`:
-
- **`client.auth`** — `signup`, `login`
- **`client.api_keys`** — `create`, `list`, `delete`
- **`client.sandboxes`** — `create`, `list`, `get`, `destroy`
- **`client.snapshots`** — `create`, `list`, `delete`
- **`client.hosts`** — `create`, `list`, `get`, `delete`, `regenerate_token`, `list_tags`, `add_tag`, `remove_tag`
-
-Both sync and async variants exist for every resource.
-
-## Architecture notes
-
- **Sync/async parity**: `WrennClient` + `AsyncWrennClient` in `client.py`, using `httpx.Client`/`httpx.AsyncClient`. Async methods on `Sandbox` are prefixed `async_` (e.g. `async_exec`, `async_upload`).
- **WebSocket library**: `httpx-ws` (not `websockets`). Used for `exec_stream`, `pty`, and `run_code`.
- **Sandbox proxy URL**: `get_url(port)` returns `ws://` or `wss://` scheme. The `http_client` property converts to `http://`/`https://` automatically.
- **`Sandbox`** (in `sandbox.py`) is the main developer-facing class — subclasses generated model, adds lifecycle methods (`exec`, `upload`, `download`, `list_dir`, `mkdir`, `remove`, `pty`, `run_code`, `wait_ready`, `pause`, `resume`, `destroy`, `ping`, `metrics`), context manager support, and proxy helpers.
- **Error handling**: `handle_response()` in `exceptions.py` maps server error `code` field to typed exceptions (not just HTTP status). All inherit from `WrennError` with `.code`, `.message`, `.status_code`.
-
-## Testing
-
- **HTTP mocking**: `respx` library (not `responses` or `pytest-httpx`). Mock routes with `@respx.mock` decorator or `respx.mock` context manager.
- **Async tests**: use `@pytest.mark.asyncio` (backed by `pytest-asyncio`).
- **Integration tests**: in `test_integration.py`, require env vars `WRENN_API_KEY` or `WRENN_TOKEN` (plus optional `WRENN_BASE_URL`, `WRENN_TEST_EMAIL`, `WRENN_TEST_PASSWORD`). They are skipped via `@requires_auth` if credentials are absent.
- **Fixtures**: test fixtures create `WrennClient(api_key="wrn_test1234567890abcdef12345678")` with context manager cleanup.
-
-## Coding conventions
-
- **Python 3.13+** with modern syntax (`|` unions, `list[str]` generics).
- **Strict typing** throughout. `pyright`/`mypy` available but not in CI.
- **`ruff`** is the sole linter and formatter. Do not use `black`, `isort`, or `flake8`.
- **Google-style docstrings** on all public APIs.
- **No comments** unless explicitly asked.
--- a/CLAUDE.md
+++ b/CLAUDE.md
@ -0,0 +1,171 @@
+## Design Context
+
+### Users
+Developers across the full spectrum — solo engineers building side projects, startup teams integrating sandboxed execution into products, and platform/infra engineers at larger organizations running production workloads on Firecracker microVMs. They arrive with context: they know what a process is, what a rootfs is, what a TTY means. The interface must feel at home for all three: approachable enough not to intimidate a hacker, precise enough to earn the trust of a production ops team. Never condescend, never oversimplify. Trust the user to understand what they're looking at.
+
+**Primary job to be done:** Understand what's running, act on it confidently, and get back to code.
+
+### Brand Personality
+**Precise. Warm. Uncompromising.**
+
+Wrenn is an engineer's favorite tool — built with visible care, not assembled from defaults. It runs real infrastructure (Firecracker microVMs), so the UI should reflect that seriousness without becoming cold or corporate. The warmth comes from the typography and color palette; the precision comes from hierarchy, density, and data fidelity.
+
+Emotional goal: **in control.** Users leave a session with full confidence in what's running, what happened, and what comes next. Nothing is hidden, nothing is ambiguous.
+
+### Aesthetic Direction
+**Dark-only (permanently), industrial-warm, data-forward.**
+
+No light mode planned. All design decisions should optimize for dark. The near-black-green background palette (`#0a0c0b` through `#2a302d`) reads as "black with intention" — not pitch black (cold) and not charcoal (dated). The sage green accent (`#5e8c58`) is muted and organic, a meaningful departure from the startup-green neon that saturates the developer tool space.
+
+**Anti-references:**
+- **Supabase**: avoid the friendly, approachable startup-green energy — too generic, too eager to please
+- **AWS / GCP consoles**: avoid utility-first density without craft — functional but joyless, visually dated
+
+**References that capture the right spirit:**
+- The precision of a well-calibrated instrument
+- Editorial typography from technical publications
+- The quiet confidence of tools that don't need to explain themselves
+
+### Type System
+Four fonts with strict roles — this is the design system's strongest personality trait and must be respected:
+
+| Font | CSS Class | Role | When to use |
+|------|-----------|------|-------------|
+| **Manrope** (variable, sans) | `font-sans` | UI workhorse | All body copy, nav, labels, buttons, form text |
+| **Instrument Serif** | `font-serif` | Display / editorial | Page titles (h1), dialog headings, metric values, hero moments |
+| **JetBrains Mono** (variable) | `font-mono` | Data / code | IDs, timestamps, key prefixes, file paths, terminal output, metrics |
+| **Alice** | brand wordmark only | Brand wordmark | "Wrenn" in sidebar and login only — nowhere else |
+
+Instrument Serif at scale creates the signature editorial moments. Mono provides the precision signal for technical data. Never swap these roles.
+
+**Tracking overrides (app.css):**
+- `.font-serif` — `letter-spacing: 0.015em` (positive tracking; Instrument Serif reads less condensed at display sizes)
+- `.font-mono` — `font-variant-numeric: tabular-nums` (numbers align in tables and metric displays)
+
+**Type scale (root: 87.5% = 14px base):**
+| Token | Value | Use |
+|---|---|---|
+| `--text-display` | 2.571rem (~36px) | Auth section headings |
+| `--text-page` | 2rem (~28px) | Page h1 titles |
+| `--text-heading` | 1.429rem (~20px) | Dialog headings, empty states |
+| `--text-body` | 1rem (~14px) | Primary body, buttons, inputs |
+| `--text-ui` | 0.929rem (~13px) | Nav labels, table cells |
+| `--text-meta` | 0.857rem (~12px) | Key prefixes, minor info |
+| `--text-label` | 0.786rem (~11px) | Uppercase section labels |
+| `--text-badge` | 0.714rem (~10px) | Live badges, tiny indicators |
+
+### Color System
+
+All values are CSS custom properties in `frontend/src/app.css`.
+
+**Backgrounds (6-step near-black-green scale):**
+| Token | Value | Use |
+|---|---|---|
+| `--color-bg-0` | `#0a0c0b` | Page base, sidebar deepest layer |
+| `--color-bg-1` | `#0f1211` | Sidebar surface |
+| `--color-bg-2` | `#141817` | Card backgrounds |
+| `--color-bg-3` | `#1a1e1c` | Table headers, elevated surfaces |
+| `--color-bg-4` | `#212624` | Hover states, inputs |
+| `--color-bg-5` | `#2a302d` | Highlighted items, selected rows |
+
+**Text (5-level hierarchy):**
+| Token | Value | Use |
+|---|---|---|
+| `--color-text-bright` | `#eae7e2` | H1s, dialog headings |
+| `--color-text-primary` | `#d0cdc6` | Body copy, primary labels |
+| `--color-text-secondary` | `#9b9790` | Secondary labels, descriptions |
+| `--color-text-tertiary` | `#6b6862` | Hints, placeholders |
+| `--color-text-muted` | `#454340` | Dividers as text, ultra-subtle |
+
+**Accent (sage green — use sparingly, must feel earned):**
+| Token | Value | Use |
+|---|---|---|
+| `--color-accent` | `#5e8c58` | Primary CTA, live indicators, focus rings, active nav |
+| `--color-accent-mid` | `#89a785` | Hover accent text |
+| `--color-accent-bright` | `#a4c89f` | Accent on dark backgrounds |
+| `--color-accent-glow` | `rgba(94,140,88,0.07)` | Subtle tinted backgrounds |
+| `--color-accent-glow-mid` | `rgba(94,140,88,0.14)` | Hover tint on accent items |
+
+**Status semantics:**
+| Token | Value | Use |
+|---|---|---|
+| `--color-amber` | `#d4a73c` | Warning, paused state |
+| `--color-red` | `#cf8172` | Error, destructive actions |
+| `--color-blue` | `#5a9fd4` | Info, neutral system states |
+
+**Borders:** `--color-border` (`#1f2321`) default; `--color-border-mid` (`#2a2f2c`) for inputs/hover.
+
+### Component Patterns
+
+**Buttons:**
+- Primary: solid sage green (`--color-accent`), hover brightness boost + micro-lift (`-translate-y-px`)
+- Secondary: bordered (`--color-border-mid`), text transitions to accent on hover
+- Danger: red text + subtle red background on hover
+- All: `transition-all duration-150`
+
+**Inputs:**
+- Border `--color-border`, background `--color-bg-2`; focus transitions border and icon to accent
+- Group focus pattern: `group` wrapper + `group-focus-within:text-[var(--color-accent)]` on icon
+
+**Tables / data lists:**
+- Grid layout; header `bg-3` + uppercase `--text-label`; row hover `hover:bg-[var(--color-bg-3)]`
+- Status stripe: left border color matches sandbox state
+
+**Status indicators:** Running = animated ping + sage green dot; Paused = amber dot; Stopped = muted gray. Color is never the sole differentiator.
+
+**Modals & dialogs:** Border + shadow only — no accent gradient bars/strips. `fadeUp` 0.35s entrance.
+
+**Empty states:** Large icon with glow, Instrument Serif heading, secondary body text, CTA below, `iconFloat` 4s animation.
+
+**Animations (always respect `prefers-reduced-motion`):** `fadeUp` (entrance), `status-ping` (live indicator), `iconFloat` (empty states), `spin-once` (refresh), staggered `animation-delay` on lists.
+
+### Design Principles
+
+1. **Precision over friendliness.** Every element earns its place. Wrenn doesn't need to tell you it's developer-friendly — that should be self-evident from the quality of the information architecture.
+
+2. **Density with breathing room.** Data-forward doesn't mean cramped. Strategic whitespace creates calm hierarchy within dense contexts. Sections breathe; rows don't waste space.
+
+3. **Industrial warmth.** The serif + mono + warm-black combination prevents sterility. This is a forge, not a gallery. The warmth is in the details, not the primary colors.
+
+4. **Legible at speed.** Users scan dashboards in seconds. Strong typographic contrast (serif h1, mono IDs, sans body), consistent patterns, and predictable placement let users orientate instantly without reading everything.
+
+5. **Craft signals trust.** For infrastructure that runs production code, the quality of the UI is a proxy for the quality of the product. Pixel-level decisions matter. Polish is not decoration — it's a trust signal.
+
+<!-- code-review-graph MCP tools -->
+## MCP Tools: code-review-graph
+
+**IMPORTANT: This project has a knowledge graph. ALWAYS use the
+code-review-graph MCP tools BEFORE using Grep/Glob/Read to explore
+the codebase.** The graph is faster, cheaper (fewer tokens), and gives
+you structural context (callers, dependents, test coverage) that file
+scanning cannot.
+
+### When to use graph tools FIRST
+
+- **Exploring code**: `semantic_search_nodes` or `query_graph` instead of Grep
+- **Understanding impact**: `get_impact_radius` instead of manually tracing imports
+- **Code review**: `detect_changes` + `get_review_context` instead of reading entire files
+- **Finding relationships**: `query_graph` with callers_of/callees_of/imports_of/tests_for
+- **Architecture questions**: `get_architecture_overview` + `list_communities`
+
+Fall back to Grep/Glob/Read **only** when the graph doesn't cover what you need.
+
+### Key Tools
+
+| Tool | Use when |
+|------|----------|
+| `detect_changes` | Reviewing code changes — gives risk-scored analysis |
+| `get_review_context` | Need source snippets for review — token-efficient |
+| `get_impact_radius` | Understanding blast radius of a change |
+| `get_affected_flows` | Finding which execution paths are impacted |
+| `query_graph` | Tracing callers, callees, imports, tests, dependencies |
+| `semantic_search_nodes` | Finding functions/classes by name or keyword |
+| `get_architecture_overview` | Understanding high-level codebase structure |
+| `refactor_tool` | Planning renames, finding dead code |
+
+### Workflow
+
+1. The graph auto-updates on file changes (via hooks).
+2. Use `detect_changes` for code review.
+3. Use `get_affected_flows` to understand impact.
+4. Use `query_graph` pattern="tests_for" to check coverage.
--- a/10
+++ b/10
@ -2,7 +2,7 @@
 .PHONY: generate lint test check test-integration

 # Variables
-SPEC_URL = "https://git.omukk.dev/wrenn/wrenn/raw/branch/dev/internal/api/openapi.yaml"
+SPEC_URL = "https://raw.githubusercontent.com/wrennhq/wrenn/refs/heads/main/internal/api/openapi.yaml"
 SPEC_PATH = "api/openapi.yaml"

 generate:
@ -21,7 +21,9 @@ generate:
 		--use-schema-description \
 		--target-python-version 3.13 \
 		--use-annotated \
-		--openapi-scopes schemas
+		--openapi-scopes schemas \
+		--formatters ruff-format ruff-check \
+		--input-file-type openapi

 lint:
 	uv run ruff check src/
@ -34,3 +36,7 @@ test-integration:
 	uv run pytest tests/ -v -m "integration or not integration"

 check: lint test
+
+gen-docs:
+	mkdir -p docs
+	uv run pydoc-markdown > docs/reference.md
--- a/README.md
+++ b/README.md
@ -1,6 +1,8 @@
 # Wrenn Python SDK

-Python client for the [Wrenn](https://wrenn.dev) microVM code execution platform. Create isolated capsules, execute commands, manage files, run interactive terminals, and execute persistent code — all from Python.
+Python client for the [Wrenn](https://wrenn.dev) microVM platform. Create isolated capsules, execute commands, manage files, run interactive terminals, and execute persistent code -- all from Python.
+
+Designed as a drop-in replacement for [e2b](https://e2b.dev). If you're migrating, just swap your imports.

 ## Installation

@ -10,97 +12,144 @@ pip install wrenn

 Requires Python 3.13+.

-## Quick Start
-
-```python
-from wrenn import WrennClient
-
-client = WrennClient(api_key="wrn_your_api_key_here")
-
-# Create a capsule and run a command
-with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-    cap.wait_ready(timeout=60)
-
-    result = cap.exec("echo", args=["hello world"])
-    print(result.stdout)     # "hello world"
-    print(result.exit_code)  # 0
-```
-
 ## Authentication

-The SDK supports two authentication methods:
+Set the `WRENN_API_KEY` environment variable:

-```python
-# API key
-client = WrennClient(api_key="wrn_...")
-
-# JWT token
-client = WrennClient(token="eyJ...")
+```bash
+export WRENN_API_KEY="wrn_your_api_key_here"
 ```

-You can obtain an API key via the dashboard or create one programmatically:
+Optionally override the API base URL:

-```python
-with WrennClient(token="jwt_token") as client:
-    key = client.api_keys.create(name="my-key")
-    print(key.key)  # wrn_...
+```bash
+export WRENN_BASE_URL="https://app.wrenn.dev/api"  # default
 ```

-## Capsules
-
-Capsules are isolated microVM environments. Create, manage, and interact with them:
+You can also pass credentials directly:

 ```python
-# Create
-cap = client.capsules.create(
-    template="base-python",
-    vcpus=2,
-    memory_mb=1024,
-    timeout_sec=300,
-)
+from wrenn import Capsule

-# List
-for c in client.capsules.list():
-    print(c.id, c.status)
+capsule = Capsule(api_key="wrn_...", base_url="https://...")
+```

-# Get
-cap = client.capsules.get("cl-abc123")
+---

-# Destroy
-client.capsules.destroy("cl-abc123")
+## Wrenn Capsules
+
+### Quick Start
+
+```python
+from wrenn import Capsule
+
+# Create a capsule (reads WRENN_API_KEY from env)
+with Capsule(template="minimal") as capsule:
+    result = capsule.commands.run("echo hello")
+    print(result.stdout)  # "hello\n"
+```
+
+### Creating Capsules
+
+```python
+from wrenn import Capsule
+
+# Direct construction (creates immediately)
+capsule = Capsule()
+capsule = Capsule(template="base-python", vcpus=2, memory_mb=1024, timeout=300)
+
+# With auto-wait (blocks until capsule is running)
+capsule = Capsule(template="minimal", wait=True)
+
+# Via factory classmethod
+capsule = Capsule.create(template="minimal", wait=True)
 ```

 ### Context Manager

-Use capsules as context managers for automatic cleanup:
+Use capsules as context managers for automatic cleanup (destroys capsule on exit):

 ```python
-with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-    cap.wait_ready(timeout=60)
-    cap.exec("python -c 'print(42)'")
-# cap.destroy() is called automatically
+with Capsule(template="minimal", wait=True) as capsule:
+    capsule.commands.run("echo hello")
+# capsule is automatically destroyed
 ```

-## Command Execution
+### Connecting to Existing Capsules

-### `exec()` — One-off Commands
-
-Starts a fresh process for each call. No state persists between calls.
+Attach to a running capsule by ID. If it's paused, it will be resumed automatically:

 ```python
-result = cap.exec("python", args=["-c", "import os; print(os.getcwd())"])
-print(result.stdout)     # "/home/user\n"
+capsule = Capsule.connect("cl-abc123")
+result = capsule.commands.run("echo still running")
+```
+
+For code interpreter capsules:
+
+```python
+from wrenn.code_interpreter import Capsule as CodeCapsule
+
+capsule = CodeCapsule.connect("cl-abc123")
+result = capsule.run_code("print('reconnected')")
+```
+
+### Lifecycle Management
+
+```python
+# Instance methods
+capsule.pause()
+capsule.resume()
+capsule.destroy()
+capsule.ping()           # reset inactivity timer
+capsule.wait_ready()     # block until running
+
+info = capsule.get_info()
+print(info.status)       # "running"
+print(capsule.is_running())  # True
+
+# Static methods (no instance needed)
+Capsule.destroy("cl-abc123", api_key="wrn_...")
+Capsule.pause("cl-abc123")
+Capsule.resume("cl-abc123")
+info = Capsule.get_info("cl-abc123")
+
+# List all capsules
+capsules = Capsule.list()
+```
+
+### Command Execution
+
+Commands are accessed via `capsule.commands`:
+
+```python
+# Foreground (blocks until complete)
+result = capsule.commands.run("python -c 'print(42)'")
+print(result.stdout)       # "42\n"
 print(result.stderr)       # ""
 print(result.exit_code)    # 0
-print(result.duration_ms)  # 42
+print(result.duration_ms)  # 35
+
+# With options
+result = capsule.commands.run(
+    "python train.py",
+    timeout=120,
+    envs={"CUDA_VISIBLE_DEVICES": "0"},
+    cwd="/app",
+)
+
+# Background process
+handle = capsule.commands.run("python server.py", background=True)
+print(handle.pid)  # 1234
+print(handle.tag)  # "exec-abc123"
 ```

-### `exec_stream()` — Streaming Output
-
-Stream real-time output from long-running commands:
+#### Streaming Output

 ```python
-for event in cap.exec_stream("python", args=["-u", "train.py"]):
+import sys
+
+# Stream a new command
+for event in capsule.commands.stream("python", args=["-u", "train.py"]):
    match event.type:
        case "stdout":
            print(event.data, end="")
@ -108,77 +157,147 @@ for event in cap.exec_stream("python", args=["-u", "train.py"]):
            print(event.data, end="", file=sys.stderr)
        case "exit":
            print(f"\nExited with code {event.exit_code}")
+
+# Connect to a running background process
+for event in capsule.commands.connect(handle.pid):
+    if event.type == "stdout":
+        print(event.data, end="")
 ```

-### `run_code()` — Stateful Code Execution
-
-Execute Python code in a persistent Jupyter kernel. Variables, imports, and function definitions survive across calls:
+#### Process Management

 ```python
-with client.capsules.create(template="python-interpreter-v0-beta") as cap:
-    cap.wait_ready(timeout=60)
+# List running processes
+for proc in capsule.commands.list():
+    print(proc.pid, proc.cmd, proc.tag)

-    cap.run_code("x = 42")
-    r = cap.run_code("x * 2")
-    print(r.text)  # "84"
-
-    cap.run_code("def greet(name): return f'hello {name}'")
-    r = cap.run_code("greet('world')")
-    print(r.text)  # "'hello world'"
-
-    r = cap.run_code("1/0")
-    print(r.error)  # "ZeroDivisionError: division by zero\n..."
+# Kill a process
+capsule.commands.kill(pid=1234)
 ```

-**`CodeResult` fields:**
+### Filesystem

-| Field | Type | Description |
-|-------|------|-------------|
-| `text` | `str \| None` | Plain text representation |
-| `data` | `dict \| None` | Rich MIME bundle (e.g. `{"image/png": "..."}`) |
-| `stdout` | `str` | Accumulated stdout |
-| `stderr` | `str` | Accumulated stderr |
-| `error` | `str \| None` | Error traceback string |
-
-## Filesystem
-
-Upload, download, and manage files inside capsules:
+Files are accessed via `capsule.files`:

 ```python
-# Upload / Download
-cap.upload("/app/main.py", b"print('hello')")
-content = cap.download("/app/main.py")
+# Write and read files
+capsule.files.write("/app/main.py", "print('hello')")
+content = capsule.files.read("/app/main.py")        # str
+raw = capsule.files.read_bytes("/app/main.py")       # bytes

-# Streaming (for large files)
+# Check existence
+capsule.files.exists("/app/main.py")  # True
+
+# List directory
+entries = capsule.files.list("/home/user", depth=1)
+for entry in entries:
+    print(entry.name, entry.type, entry.size)
+
+# Create directory
+capsule.files.make_dir("/app/data")
+
+# Remove file or directory
+capsule.files.remove("/app/old_data")
+```
+
+#### Streaming (Large Files)
+
+```python
+# Streaming upload
 def chunks():
    yield b"chunk1"
    yield b"chunk2"

-cap.stream_upload("/data/large.bin", chunks())
-for chunk in cap.stream_download("/data/large.bin"):
+capsule.files.upload_stream("/data/large.bin", chunks())
+
+# Streaming download
+for chunk in capsule.files.download_stream("/data/large.bin"):
    process(chunk)
-
-# Directory operations
-entries = cap.list_dir("/home/user", depth=1)
-for entry in entries:
-    print(entry.name, entry.type, entry.size)
-
-cap.mkdir("/home/user/data")
-cap.remove("/home/user/old_data")
 ```

-## Interactive Terminal (PTY)
+### Git

-Open a full interactive terminal session over WebSocket:
+Git operations are accessed via `capsule.git`. All commands execute the real `git` binary inside the capsule:

 ```python
-with cap.pty(cmd="/bin/bash", cols=120, rows=40, cwd="/home/user") as term:
+# Initialize a repo
+capsule.git.init("/app", initial_branch="main")
+
+# Configure user
+capsule.git.configure_user("Alice", "alice@example.com", cwd="/app")
+
+# Stage and commit
+capsule.git.add(all=True, cwd="/app")
+capsule.git.commit("initial commit", cwd="/app")
+
+# Check status
+status = capsule.git.status(cwd="/app")
+print(status.branch)    # "main"
+print(status.is_clean)  # True
+for f in status.files:
+    print(f.path, f.index_status, f.work_tree_status)
+
+# Branches
+branches = capsule.git.branches(cwd="/app")
+capsule.git.create_branch("feature", cwd="/app")
+capsule.git.checkout_branch("main", cwd="/app")
+capsule.git.delete_branch("feature", cwd="/app")
+```
+
+#### Clone with Authentication
+
+```python
+# Clone a private repo (credentials are stripped from remote URL after clone)
+capsule.git.clone(
+    "https://github.com/org/repo.git",
+    username="user",
+    password="ghp_token",
+    cwd="/app",
+)
+
+# Push/pull with inline credentials (temporarily embedded, then restored)
+capsule.git.push("origin", "main", username="user", password="ghp_token", cwd="/app")
+capsule.git.pull("origin", "main", username="user", password="ghp_token", cwd="/app")
+```
+
+#### Configuration and Remotes
+
+```python
+capsule.git.set_config("core.autocrlf", "false", cwd="/app")
+value = capsule.git.get_config("user.name", cwd="/app")  # str | None
+
+capsule.git.remote_add("upstream", "https://github.com/org/repo.git", cwd="/app")
+url = capsule.git.remote_get("origin", cwd="/app")  # str | None
+```
+
+Git errors raise `GitCommandError` (or `GitAuthError` for authentication failures), both inheriting from `GitError`:
+
+```python
+from wrenn import GitCommandError, GitAuthError
+
+try:
+    capsule.git.push("origin", "main", username="user", password="bad", cwd="/app")
+except GitAuthError as e:
+    print(e.stderr)
+    print(e.exit_code)
+```
+
+### Interactive Terminal (PTY)
+
+```python
+import sys
+
+with capsule.pty(cmd="/bin/bash", cols=120, rows=40, cwd="/home/user") as term:
    term.write(b"ls -la\n")
    for event in term:
        if event.type == "output":
            sys.stdout.buffer.write(event.data)
        elif event.type == "exit":
            break
+
+# Reconnect to an existing session
+with capsule.pty_connect(term.tag) as term:
+    term.write(b"echo reconnected\n")
 ```

 **PtySession methods:**
@ -188,123 +307,189 @@ with cap.pty(cmd="/bin/bash", cols=120, rows=40, cwd="/home/user") as term:
 | `write(data: bytes)` | Send raw bytes to stdin |
 | `resize(cols, rows)` | Resize the terminal |
 | `kill()` | Send SIGKILL to the process |
-| `tag` | Session tag (available after `started` event) |
-| `pid` | Process PID (available after `started` event) |
+| `tag` | Session tag (after `started` event) |
+| `pid` | Process PID (after `started` event) |

-Reconnect to an existing session using the tag:
+### Proxy URL
+
+Access services running inside a capsule:

 ```python
-with cap.pty_connect(term.tag) as term:
-    term.write(b"echo reconnected\n")
+url = capsule.get_url(8080)
+# "wss://8080-cl-abc123.app.wrenn.dev"
 ```

-## Lifecycle
+### Snapshots

-Pause and resume capsules to save resources:
+Create reusable templates from running capsules:

 ```python
-cap = client.capsules.create(template="minimal")
-cap.wait_ready(timeout=60)
-
-# Pause (snapshots and releases resources)
-cap.pause()
-print(cap.status)  # "paused"
-
-# Resume (restores from snapshot)
-cap.resume()
-cap.wait_ready(timeout=60)
+template = capsule.create_snapshot(name="my-template", overwrite=True)
 ```

-Keep a capsule alive with `ping()`:
+---
+
+## Code Interpreter
+
+The `wrenn.code_interpreter` module provides a specialized capsule for stateful code execution via a persistent Jupyter kernel.
+
+### Quick Start

 ```python
-cap.ping()  # Resets the inactivity timer
+from wrenn.code_interpreter import Capsule
+
+with Capsule(wait=True) as capsule:
+    result = capsule.run_code("print('hello')")
+    print("".join(result.logs.stdout))  # "hello\n"
 ```

-## Proxy URL
+### Stateful Execution

-Access services running inside a capsule through the proxy:
+Variables, imports, and function definitions persist across `run_code` calls:

 ```python
-url = cap.get_url(8888)
-# "wss://8888-cl-abc123.api.wrenn.dev"
+from wrenn.code_interpreter import Capsule

-# Pre-configured HTTP client targeting port 8888
-resp = cap.http_client.get("/api/kernels")
+with Capsule(wait=True) as capsule:
+    capsule.run_code("x = 42")
+    result = capsule.run_code("x * 2")
+    print(result.text)  # "84"
+
+    capsule.run_code("import math")
+    result = capsule.run_code("math.pi")
+    print(result.text)  # "3.141592653589793"
+
+    capsule.run_code("def greet(name): return f'hello {name}'")
+    result = capsule.run_code("greet('world')")
+    print(result.text)  # "hello world"
 ```

-## Snapshots
+The `text` property returns the `text/plain` value of the main `execute_result` (the last expression in the cell). Printed output goes to `result.logs.stdout` instead.

-Create templates from running capsules:
+### Error Handling in Code

 ```python
-# Create a snapshot
-template = client.snapshots.create(
-    capsule_id="cl-abc123",
-    name="my-template",
-    overwrite=True,
+result = capsule.run_code("1 / 0")
+print(result.error.name)       # "ZeroDivisionError"
+print(result.error.value)      # "division by zero"
+print(result.error.traceback)  # full traceback string
+```
+
+### Rich Output
+
+Each call to `display()`, `plt.show()`, or similar produces a `Result` in `execution.results`. Known MIME types are unpacked into named fields:
+
+```python
+result = capsule.run_code("""
+import matplotlib.pyplot as plt
+plt.plot([1, 2, 3])
+plt.show()
+""")
+for r in result.results:
+    if r.png:
+        print(f"Got PNG image ({len(r.png)} bytes base64)")
+    print(r.formats())  # e.g. ["text", "png"]
+```
+
+### Streaming Callbacks
+
+```python
+capsule.run_code(
+    code,
+    on_result=lambda r: print("result:", r.formats()),
+    on_stdout=lambda text: print("stdout:", text),
+    on_stderr=lambda text: print("stderr:", text),
+    on_error=lambda err: print(f"error: {err.name}: {err.value}"),
 )
-
-# List templates
-for t in client.snapshots.list():
-    print(t.name, t.type)
-
-# Delete
-client.snapshots.delete("my-template")
 ```

-## Hosts
+### Custom Templates

-Manage host machines:
+By default, `code-runner-beta` template is used. You can specify a custom template:

 ```python
-host = client.hosts.create(type="regular")
-client.hosts.list()
-client.hosts.get("h-1")
-client.hosts.delete("h-1")
-client.hosts.regenerate_token("h-1")
-client.hosts.list_tags("h-1")
-client.hosts.add_tag("h-1", "gpu")
-client.hosts.remove_tag("h-1", "gpu")
+capsule = Capsule(template="my-custom-jupyter-template", wait=True)
+result = capsule.run_code("print('running on custom template')")
 ```

+### Execution Model
+
+`run_code()` returns an `Execution` object:
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `results` | `list[Result]` | All rich outputs (charts, images, expression values) |
+| `logs` | `Logs` | `.stdout: list[str]` and `.stderr: list[str]` chunks |
+| `error` | `ExecutionError \| None` | `.name`, `.value`, `.traceback` |
+| `execution_count` | `int \| None` | Jupyter cell execution counter |
+| `text` | `str \| None` | (property) `text/plain` of the main `execute_result` |
+
+Each `Result` has typed MIME fields: `text`, `html`, `markdown`, `svg`, `png`, `jpeg`, `pdf`, `latex`, `json`, `javascript`, plus `extra` for unknown types. String expression results have quotes stripped automatically.
+
+### Code Interpreter + Commands/Files
+
+The code interpreter capsule inherits all standard capsule features:
+
+```python
+from wrenn.code_interpreter import Capsule
+
+with Capsule(wait=True) as capsule:
+    # Use run_code for Jupyter execution
+    capsule.run_code("import pandas as pd; df = pd.DataFrame({'a': [1,2,3]})")
+    capsule.run_code("df.to_csv('/tmp/data.csv', index=False)")
+
+    # Use standard file operations
+    content = capsule.files.read("/tmp/data.csv")
+    print(content)
+
+    # Use standard command execution
+    result = capsule.commands.run("wc -l /tmp/data.csv")
+    print(result.stdout)
+```
+
+---
+
 ## Async Support

-All operations have async variants. Use `AsyncWrennClient` and prefix capsule methods with `async_`:
+All operations have async variants via `AsyncCapsule`:
+
+### Async Capsule

 ```python
-from wrenn import AsyncWrennClient
+from wrenn import AsyncCapsule

-async with AsyncWrennClient(api_key="wrn_...") as client:
-    cap = await client.capsules.create(template="minimal")
-    await cap.async_wait_ready(timeout=60)
+async with await AsyncCapsule.create(template="minimal", wait=True) as capsule:
+    result = await capsule.commands.run("echo hello")
+    print(result.stdout)

-    result = await cap.async_exec("echo", args=["hello"])
-    await cap.async_upload("/app/file.txt", b"data")
-    entries = await cap.async_list_dir("/home/user")
-    r = await cap.async_run_code("42 * 2")
+    await capsule.files.write("/app/file.txt", "data")
+    entries = await capsule.files.list("/app")

-    await cap.async_destroy()
+    await capsule.pause()
+    await capsule.resume()
 ```

-**Async method mapping:**
+### Async Code Interpreter

-| Sync | Async |
-|------|-------|
-| `exec()` | `async_exec()` |
-| `upload()` | `async_upload()` |
-| `download()` | `async_download()` |
-| `stream_upload()` | `async_stream_upload()` |
-| `stream_download()` | `async_stream_download()` |
-| `list_dir()` | `async_list_dir()` |
-| `mkdir()` | `async_mkdir()` |
-| `remove()` | `async_remove()` |
-| `wait_ready()` | `async_wait_ready()` |
-| `pause()` | `async_pause()` |
-| `resume()` | `async_resume()` |
-| `destroy()` | `async_destroy()` |
-| `ping()` | `async_ping()` |
-| `run_code()` | `async_run_code()` |
+```python
+from wrenn.code_interpreter import AsyncCapsule
+
+async with await AsyncCapsule.create(wait=True) as capsule:
+    result = await capsule.run_code("2 + 2")
+    print(result.text)  # "4"
+```
+
+### Async PTY
+
+```python
+async with capsule.pty(cmd="/bin/bash") as term:
+    await term.write(b"ls -la\n")
+    async for event in term:
+        if event.type == "output":
+            sys.stdout.buffer.write(event.data)
+```
+
+---

 ## Error Handling

@ -318,14 +503,14 @@ from wrenn import (
    WrennForbiddenError,       # 403
    WrennNotFoundError,        # 404
    WrennConflictError,        # 409
-    WrennHostHasCapsulesError, # 409 — host has running capsules
+    WrennHostHasCapsulesError, # 409 (host has running capsules)
    WrennAgentError,           # 502
    WrennInternalError,        # 500
    WrennHostUnavailableError, # 503
 )

 try:
-    client.capsules.get("nonexistent")
+    Capsule.get_info("nonexistent")
 except WrennNotFoundError as e:
    print(e.code)         # "not_found"
    print(e.message)      # "capsule not found"
@ -334,6 +519,67 @@ except WrennNotFoundError as e:

 All exceptions inherit from `WrennError` and expose `.code`, `.message`, and `.status_code`.

+---
+
+## Migrating from e2b
+
+Replace your imports:
+
+```python
+# Before
+from e2b import Sandbox
+sandbox = Sandbox()
+
+# After
+from wrenn import Capsule
+capsule = Capsule()
+```
+
+For code interpreter:
+
+```python
+# Before
+from e2b_code_interpreter import Sandbox
+sandbox = Sandbox()
+result = sandbox.run_code("print('hello')")
+
+# After
+from wrenn.code_interpreter import Capsule
+capsule = Capsule()
+result = capsule.run_code("print('hello')")
+```
+
+The `Sandbox` name is available as a deprecated alias in both modules:
+
+```python
+from wrenn import Sandbox                    # works, emits FutureWarning
+from wrenn.code_interpreter import Sandbox   # works, emits FutureWarning
+```
+
+---
+
+## Low-Level Client
+
+For direct API access, use `WrennClient` / `AsyncWrennClient`:
+
+```python
+from wrenn import WrennClient
+
+with WrennClient(api_key="wrn_...") as client:
+    capsule = client.capsules.create(template="minimal")
+    client.capsules.pause(capsule.id)
+    client.capsules.resume(capsule.id)
+    client.capsules.ping(capsule.id)
+    client.capsules.destroy(capsule.id)
+
+    # Snapshots
+    template = client.snapshots.create(capsule_id="cl-abc", name="my-snap")
+    templates = client.snapshots.list()
+    client.snapshots.delete("my-snap")
+```
+
+---
+
 ## Development

 This project uses [uv](https://docs.astral.sh/uv/) for dependency management.
@ -350,21 +596,28 @@ make test

 # Run all tests (including integration)
 make test-integration
-
-# Regenerate models from OpenAPI spec
-make generate
 ```

 ### Running Integration Tests

-Integration tests require a live Wrenn server. Set environment variables:
+Integration tests require a live Wrenn server. Set credentials via environment or a `.env` file at the project root:

 ```bash
+# Option 1: environment variable
 export WRENN_API_KEY="wrn_..."
-export WRENN_BASE_URL="http://localhost:8080"  # optional
+
+# Option 2: .env file
+echo 'WRENN_API_KEY=wrn_...' > .env
+```
+
+Then run:
+
+```bash
 make test-integration
 ```

+Tests are automatically skipped when `WRENN_API_KEY` is not available.
+
 ## License

 MIT
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@ -1,8 +1,8 @@
 openapi: "3.1.0"
 info:
  title: Wrenn API
-  description: MicroVM-based code execution platform API.
-  version: "0.1.2"
+  description: AI agent execution platform API.
+  version: "0.2.0"

 servers:
  - url: http://localhost:8080
@ -866,8 +866,8 @@ paths:
            schema:
              $ref: "#/components/schemas/CreateCapsuleRequest"
      responses:
-        "201":
-          description: Capsule created
+        "202":
+          description: Capsule creation initiated (status will be "starting")
          content:
            application/json:
              schema:
@ -988,8 +988,8 @@ paths:
      security:
        - apiKeyAuth: []
      responses:
-        "204":
-          description: Capsule destroyed
+        "202":
+          description: Capsule destruction initiated

  /v1/capsules/{id}/exec:
    parameters:
@ -1260,8 +1260,8 @@ paths:
        destroys all running resources. The capsule exists only as files on
        disk and can be resumed later.
      responses:
-        "200":
-          description: Capsule paused (snapshot taken, resources released)
+        "202":
+          description: Capsule pause initiated (status will be "pausing")
          content:
            application/json:
              schema:
@ -1292,8 +1292,8 @@ paths:
        memory loading. Boots a fresh Firecracker process, sets up a new
        network slot, and waits for envd to become ready.
      responses:
-        "200":
-          description: Capsule resumed (new VM booted from snapshot)
+        "202":
+          description: Capsule resume initiated (status will be "resuming")
          content:
            application/json:
              schema:
@ -2035,6 +2035,51 @@ paths:
              schema:
                $ref: "#/components/schemas/Error"

+  /v1/hosts/sandbox-events:
+    post:
+      summary: Sandbox lifecycle event callback
+      operationId: sandboxEventCallback
+      tags: [hosts]
+      security:
+        - hostTokenAuth: []
+      description: |
+        Receives autonomous lifecycle events from host agents (e.g. auto-pause
+        from the TTL reaper). The event is published to an internal Redis stream
+        for the control plane's event consumer to process.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [event, sandbox_id, host_id]
+              properties:
+                event:
+                  type: string
+                  enum: [sandbox.auto_paused]
+                sandbox_id:
+                  type: string
+                host_id:
+                  type: string
+                timestamp:
+                  type: integer
+                  format: int64
+      responses:
+        "204":
+          description: Event accepted
+        "400":
+          description: Invalid request
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+        "403":
+          description: Host ID mismatch
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+
  /v1/hosts/auth/refresh:
    post:
      summary: Refresh host JWT
@ -2346,6 +2391,54 @@ paths:
              schema:
                $ref: "#/components/schemas/Error"

+  /v1/admin/users/{id}/admin:
+    put:
+      summary: Grant or revoke platform admin
+      operationId: setUserAdmin
+      tags: [admin]
+      description: |
+        Sets the platform admin flag on a user. Cannot remove the last admin.
+        Requires platform admin access (JWT + is_admin).
+        The target user's JWT is not re-issued — their frontend will reflect the
+        change on next login or team switch.
+      security:
+        - bearerAuth: []
+      parameters:
+        - name: id
+          in: path
+          required: true
+          schema:
+            type: string
+            example: "usr-a1b2c3d4"
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [admin]
+              properties:
+                admin:
+                  type: boolean
+                  description: true to grant admin, false to revoke.
+      responses:
+        "204":
+          description: Admin status updated
+        "400":
+          $ref: "#/components/responses/BadRequest"
+        "403":
+          description: Caller is not a platform admin
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+        "404":
+          description: User not found
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Error"
+
 components:
  securitySchemes:
    apiKeyAuth:
@ -2544,7 +2637,7 @@ components:
          type: string
        status:
          type: string
-          enum: [pending, starting, running, paused, hibernated, stopped, missing, error]
+          enum: [pending, starting, running, pausing, paused, resuming, stopping, hibernated, stopped, missing, error]
        template:
          type: string
        vcpus:
--- a/docs/reference.md
+++ b/docs/reference.md
--- a/pydoc-markdown.yml
+++ b/pydoc-markdown.yml
@ -0,0 +1,12 @@
+loaders:
+  - type: python
+    search_path: [src]
+
+processors:
+  - type: google  # Use Google-style docstring parser
+  - type: filter
+  - type: crossref
+
+renderer:
+  type: markdown
+  escape_html_in_docstring: false
--- a/pyproject.toml
+++ b/pyproject.toml
@ -1,12 +1,26 @@
 [project]
 name = "wrenn"
-version = "0.1.0"
-description = "Add your description here"
+version = "0.1.1"
+description = "Python SDK for Wrenn"
 readme = "README.md"
+license = "MIT"
+license-files = ["LICENSE"]
 authors = [
-    { name = "Tasnim Kabir Sadik", email = "tksadik92@gmail.com" }
+    { name = "Rafeed M. Bhuiyan", email = "rafeed@omukk.dev" },
+    { name = "Tasnim Kabir Sadik", email = "tksadik@omukk.dev" },
 ]
 requires-python = ">=3.13"
+keywords = ["wrenn"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    "Typing :: Typed",
+]
 dependencies = [
    "email-validator>=2.3.0",
    "httpx>=0.28.1",
@ -20,14 +34,20 @@ build-backend = "hatchling.build"

 [dependency-groups]
 dev = [
-    "datamodel-code-generator>=0.56.0",
+    "datamodel-code-generator[ruff]>=0.56.0",
    "mypy>=1.20.0",
+    "pre-commit>=4.6.0",
+    "pydoc-markdown>=4.8.2",
    "pytest>=9.0.3",
    "pytest-asyncio>=1.3.0",
    "respx>=0.23.1",
    "ruff>=0.15.10",
 ]

+[project.urls]
+Homepage = "https://wrenn.dev"
+Repository = "https://github.com/wrennhq/python-sdk"
+
 [tool.pytest.ini_options]
 markers = [
    "integration: integration tests (require live server)",
--- a/src/wrenn/init.py
+++ b/src/wrenn/init.py
@ -1,7 +1,20 @@
-from wrenn.capsule import (
-    Capsule,
-    CodeResult,
-    ExecResult,
+from wrenn._git import (
+    AsyncGit,
+    FileStatus,
+    Git,
+    GitAuthError,
+    GitBranch,
+    GitCommandError,
+    GitError,
+    GitStatus,
+)
+from wrenn.async_capsule import AsyncCapsule
+from wrenn.capsule import Capsule
+from wrenn.client import AsyncWrennClient, WrennClient
+from wrenn.commands import (
+    CommandHandle,
+    CommandResult,
+    ProcessInfo,
    StreamErrorEvent,
    StreamEvent,
    StreamExitEvent,
@ -9,7 +22,6 @@ from wrenn.capsule import (
    StreamStderrEvent,
    StreamStdoutEvent,
 )
-from wrenn.client import AsyncWrennClient, WrennClient
 from wrenn.exceptions import (
    WrennAgentError,
    WrennAuthenticationError,
@ -29,12 +41,22 @@ __version__ = "0.1.0"

 __all__ = [
    "__version__",
+    "AsyncCapsule",
+    "AsyncGit",
    "AsyncPtySession",
    "AsyncWrennClient",
    "Capsule",
-    "CodeResult",
-    "ExecResult",
+    "CommandHandle",
+    "CommandResult",
    "FileEntry",
+    "FileStatus",
+    "Git",
+    "GitAuthError",
+    "GitBranch",
+    "GitCommandError",
+    "GitError",
+    "GitStatus",
+    "ProcessInfo",
    "PtyEvent",
    "PtyEventType",
    "PtySession",
@ -61,22 +83,25 @@ __all__ = [


 def __getattr__(name: str) -> type:
-    if name == "Sandbox":
+    import sys
    import warnings

+    _module = sys.modules[__name__]
+
+    if name == "Sandbox":
        warnings.warn(
            "'Sandbox' is deprecated, use 'Capsule' instead",
-            DeprecationWarning,
+            FutureWarning,
            stacklevel=2,
        )
+        setattr(_module, name, Capsule)
        return Capsule
    if name == "WrennHostHasSandboxesError":
-        import warnings
-
        warnings.warn(
            "'WrennHostHasSandboxesError' is deprecated, use 'WrennHostHasCapsulesError' instead",
-            DeprecationWarning,
+            FutureWarning,
            stacklevel=2,
        )
+        setattr(_module, name, WrennHostHasCapsulesError)
        return WrennHostHasCapsulesError
    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
--- a/src/wrenn/_config.py
+++ b/src/wrenn/_config.py
@ -0,0 +1,5 @@
+from __future__ import annotations
+
+DEFAULT_BASE_URL = "https://app.wrenn.dev/api"
+ENV_API_KEY = "WRENN_API_KEY"
+ENV_BASE_URL = "WRENN_BASE_URL"
--- a/src/wrenn/_git/init.py
+++ b/src/wrenn/_git/init.py
--- a/src/wrenn/_git/_auth.py
+++ b/src/wrenn/_git/_auth.py
@ -0,0 +1,104 @@
+from __future__ import annotations
+
+import shlex
+from urllib.parse import urlparse, urlunparse
+
+
+def embed_credentials(url: str, username: str, password: str) -> str:
+    """Embed HTTP(S) credentials into a git URL.
+
+    Args:
+        url: Git repository URL.
+        username: Username for authentication.
+        password: Password or personal access token.
+
+    Returns:
+        URL with ``username:password@`` embedded in the netloc.
+
+    Raises:
+        ValueError: If the URL scheme is not ``http`` or ``https``.
+    """
+    parsed = urlparse(url)
+    if parsed.scheme not in ("http", "https"):
+        raise ValueError("Only http(s) URLs support embedded credentials.")
+    netloc = f"{username}:{password}@{parsed.hostname}"
+    if parsed.port:
+        netloc = f"{netloc}:{parsed.port}"
+    return urlunparse(parsed._replace(netloc=netloc))
+
+
+def strip_credentials(url: str) -> str:
+    """Remove embedded credentials from a git URL.
+
+    Args:
+        url: Git repository URL, possibly with credentials.
+
+    Returns:
+        URL with credentials removed. Non-HTTP(S) URLs are returned
+        unchanged.
+    """
+    parsed = urlparse(url)
+    if parsed.scheme not in ("http", "https"):
+        return url
+    if not parsed.username and not parsed.password:
+        return url
+    host = parsed.hostname or ""
+    if parsed.port:
+        host = f"{host}:{parsed.port}"
+    return urlunparse(parsed._replace(netloc=host))
+
+
+def is_auth_error(stderr: str) -> bool:
+    """Check whether git stderr indicates an authentication failure.
+
+    Args:
+        stderr: Combined stderr output from a git command.
+
+    Returns:
+        ``True`` if any known auth-failure pattern is found.
+    """
+    lower = stderr.lower()
+    patterns = (
+        "authentication failed",
+        "terminal prompts disabled",
+        "could not read username",
+        "invalid username or password",
+        "access denied",
+        "permission denied",
+        "not authorized",
+    )
+    return any(p in lower for p in patterns)
+
+
+def build_credential_approve_cmd(
+    username: str,
+    password: str,
+    host: str = "github.com",
+    protocol: str = "https",
+) -> str:
+    """Build a shell command that pipes credentials into ``git credential approve``.
+
+    Args:
+        username: Git username.
+        password: Password or personal access token.
+        host: Target host. Defaults to ``"github.com"``.
+        protocol: Protocol. Defaults to ``"https"``.
+
+    Returns:
+        A shell command string safe to pass to ``commands.run()``.
+    """
+    if "\n" in username or "\n" in password:
+        raise ValueError("Credentials must not contain newline characters.")
+    target_host = host.strip() or "github.com"
+    target_protocol = protocol.strip() or "https"
+    credential_input = "\n".join(
+        [
+            f"protocol={target_protocol}",
+            f"host={target_host}",
+            f"username={username}",
+            f"password={password}",
+            "",
+            "",
+        ]
+    )
+    return f"printf %s {shlex.quote(credential_input)} | git credential approve"
--- a/src/wrenn/_git/_cmd.py
+++ b/src/wrenn/_git/_cmd.py
@ -0,0 +1,499 @@
+"""Pure functions that build git argument lists and parse git output.
+
+No I/O, no network, no imports from ``wrenn``. Every ``build_*`` function
+returns a ``list[str]`` suitable for ``shlex.join()``.  Every ``parse_*``
+function takes raw stdout and returns a typed structure.
+"""
+
+from __future__ import annotations
+
+import re
+from dataclasses import dataclass, field
+
+
+# ── Data types ─────────────────────────────────────────────────────
+
+
+@dataclass
+class FileStatus:
+    """A single entry from ``git status --porcelain=v1``.
+
+    Attributes:
+        path (str): File path relative to the repository root.
+        index_status (str): Index (staged) status character.
+        work_tree_status (str): Working-tree status character.
+        renamed_from (str | None): Original path when status is a rename.
+    """
+
+    path: str
+    index_status: str
+    work_tree_status: str
+    renamed_from: str | None = None
+
+    @property
+    def staged(self) -> bool:
+        """Whether the change is staged in the index."""
+        return self.index_status not in (" ", "?")
+
+    @property
+    def status(self) -> str:
+        """Normalized human-readable status label."""
+        return _derive_status(self.index_status, self.work_tree_status)
+
+
+@dataclass
+class GitStatus:
+    """Parsed output of ``git status --porcelain=v1 --branch``.
+
+    Attributes:
+        branch (str | None): Current branch name, or ``None`` if detached.
+        upstream (str | None): Upstream tracking branch.
+        ahead (int): Commits ahead of upstream.
+        behind (int): Commits behind upstream.
+        detached (bool): Whether HEAD is detached.
+        files (list[FileStatus]): Per-file status entries.
+    """
+
+    branch: str | None = None
+    upstream: str | None = None
+    ahead: int = 0
+    behind: int = 0
+    detached: bool = False
+    files: list[FileStatus] = field(default_factory=list)
+
+    @property
+    def is_clean(self) -> bool:
+        """``True`` when there are no changed or untracked files."""
+        return len(self.files) == 0
+
+    @property
+    def has_staged(self) -> bool:
+        """``True`` when at least one file has staged changes."""
+        return any(f.staged for f in self.files)
+
+    @property
+    def has_untracked(self) -> bool:
+        """``True`` when at least one file is untracked."""
+        return any(f.status == "untracked" for f in self.files)
+
+    @property
+    def has_conflicts(self) -> bool:
+        """``True`` when at least one file has merge conflicts."""
+        return any(f.status == "conflict" for f in self.files)
+
+
+@dataclass
+class GitBranch:
+    """A single branch entry.
+
+    Attributes:
+        name (str): Branch name (short ref).
+        is_current (bool): Whether this is the checked-out branch.
+    """
+
+    name: str
+    is_current: bool = False
+
+
+# ── Argument builders ──────────────────────────────────────────────
+
+
+def build_clone(
+    url: str,
+    dest: str | None = None,
+    *,
+    branch: str | None = None,
+    depth: int | None = None,
+) -> list[str]:
+    """Build ``git clone`` arguments."""
+    args = ["git", "clone"]
+    if branch:
+        args.extend(["--branch", branch, "--single-branch"])
+    if depth is not None:
+        args.extend(["--depth", str(depth)])
+    args.append(url)
+    if dest:
+        args.append(dest)
+    return args
+
+
+def build_init(
+    path: str = ".",
+    *,
+    bare: bool = False,
+    initial_branch: str | None = None,
+) -> list[str]:
+    """Build ``git init`` arguments."""
+    args = ["git", "init"]
+    if initial_branch:
+        args.extend(["--initial-branch", initial_branch])
+    if bare:
+        args.append("--bare")
+    args.append(path)
+    return args
+
+
+def build_add(
+    paths: list[str] | None = None,
+    *,
+    all: bool = False,
+) -> list[str]:
+    """Build ``git add`` arguments."""
+    args = ["git", "add"]
+    if not paths:
+        args.append("-A" if all else ".")
+    else:
+        args.append("--")
+        args.extend(paths)
+    return args
+
+
+def build_commit(
+    message: str,
+    *,
+    allow_empty: bool = False,
+    author_name: str | None = None,
+    author_email: str | None = None,
+) -> list[str]:
+    """Build ``git commit`` arguments."""
+    args = ["git"]
+    if author_name:
+        args.extend(["-c", f"user.name={author_name}"])
+    if author_email:
+        args.extend(["-c", f"user.email={author_email}"])
+    args.extend(["commit", "-m", message])
+    if allow_empty:
+        args.append("--allow-empty")
+    return args
+
+
+def build_push(
+    remote: str = "origin",
+    branch: str | None = None,
+    *,
+    force: bool = False,
+    set_upstream: bool = False,
+) -> list[str]:
+    """Build ``git push`` arguments."""
+    args = ["git", "push"]
+    if force:
+        args.append("--force")
+    if set_upstream:
+        args.append("--set-upstream")
+    args.append(remote)
+    if branch:
+        args.append(branch)
+    return args
+
+
+def build_pull(
+    remote: str = "origin",
+    branch: str | None = None,
+    *,
+    rebase: bool = False,
+    ff_only: bool = False,
+) -> list[str]:
+    """Build ``git pull`` arguments."""
+    args = ["git", "pull"]
+    if rebase:
+        args.append("--rebase")
+    if ff_only:
+        args.append("--ff-only")
+    args.append(remote)
+    if branch:
+        args.append(branch)
+    return args
+
+
+def build_status() -> list[str]:
+    """Build ``git status`` arguments for porcelain parsing."""
+    return ["git", "status", "--porcelain=v1", "--branch"]
+
+
+def build_branches() -> list[str]:
+    """Build ``git branch`` arguments for structured parsing."""
+    return ["git", "branch", "--format=%(refname:short)\t%(HEAD)"]
+
+
+def build_create_branch(
+    name: str,
+    *,
+    start_point: str | None = None,
+) -> list[str]:
+    """Build ``git checkout -b`` arguments."""
+    args = ["git", "checkout", "-b", name]
+    if start_point:
+        args.append(start_point)
+    return args
+
+
+def build_checkout(name: str) -> list[str]:
+    """Build ``git checkout`` arguments."""
+    return ["git", "checkout", name]
+
+
+def build_delete_branch(
+    name: str,
+    *,
+    force: bool = False,
+) -> list[str]:
+    """Build ``git branch -d/-D`` arguments."""
+    return ["git", "branch", "-D" if force else "-d", name]
+
+
+def build_remote_add(name: str, url: str, *, fetch: bool = False) -> list[str]:
+    """Build ``git remote add`` arguments."""
+    args = ["git", "remote", "add"]
+    if fetch:
+        args.append("-f")
+    args.extend([name, url])
+    return args
+
+
+def build_remote_get_url(name: str = "origin") -> list[str]:
+    """Build ``git remote get-url`` arguments."""
+    return ["git", "remote", "get-url", name]
+
+
+def build_remote_set_url(name: str, url: str) -> list[str]:
+    """Build ``git remote set-url`` arguments."""
+    return ["git", "remote", "set-url", name, url]
+
+
+def build_reset(
+    *,
+    mode: str | None = None,
+    ref: str | None = None,
+    paths: list[str] | None = None,
+) -> list[str]:
+    """Build ``git reset`` arguments.
+
+    Args:
+        mode: Reset mode (``soft``, ``mixed``, ``hard``, ``merge``, ``keep``).
+        ref: Commit, branch, or ref to reset to.
+        paths: Paths to reset (mutually exclusive with ``mode``).
+    """
+    _ALLOWED_MODES = {"soft", "mixed", "hard", "merge", "keep"}
+    if mode and mode not in _ALLOWED_MODES:
+        raise ValueError(
+            f"Reset mode must be one of {', '.join(sorted(_ALLOWED_MODES))}."
+        )
+    args = ["git", "reset"]
+    if mode:
+        args.append(f"--{mode}")
+    if ref:
+        args.append(ref)
+    if paths:
+        args.append("--")
+        args.extend(paths)
+    return args
+
+
+def build_restore(
+    paths: list[str],
+    *,
+    staged: bool = False,
+    worktree: bool = False,
+    source: str | None = None,
+) -> list[str]:
+    """Build ``git restore`` arguments.
+
+    Args:
+        paths: Paths to restore.
+        staged: Restore the index (unstage).
+        worktree: Restore working-tree files.
+        source: Commit or ref to restore from.
+    """
+    if not paths:
+        raise ValueError("At least one path is required.")
+    if not staged and not worktree:
+        worktree = True
+    args = ["git", "restore"]
+    if worktree:
+        args.append("--worktree")
+    if staged:
+        args.append("--staged")
+    if source:
+        args.extend(["--source", source])
+    args.append("--")
+    args.extend(paths)
+    return args
+
+
+def build_config_set(
+    key: str,
+    value: str,
+    *,
+    scope: str = "local",
+    repo_path: str | None = None,
+) -> list[str]:
+    """Build ``git config`` set arguments."""
+    scope_flag = _resolve_scope_flag(scope)
+    args = ["git"]
+    if scope == "local" and repo_path:
+        args.extend(["-C", repo_path])
+    args.extend(["config", scope_flag, key, value])
+    return args
+
+
+def build_config_get(
+    key: str,
+    *,
+    scope: str = "local",
+    repo_path: str | None = None,
+) -> list[str]:
+    """Build ``git config --get`` arguments."""
+    scope_flag = _resolve_scope_flag(scope)
+    args = ["git"]
+    if scope == "local" and repo_path:
+        args.extend(["-C", repo_path])
+    args.extend(["config", scope_flag, "--get", key])
+    return args
+
+
+def build_has_upstream() -> list[str]:
+    """Build arguments to check if current branch has upstream tracking."""
+    return ["git", "rev-parse", "--abbrev-ref", "--symbolic-full-name", "@{u}"]
+
+
+# ── Parsers ────────────────────────────────────────────────────────
+
+
+def parse_status(stdout: str) -> GitStatus:
+    """Parse ``git status --porcelain=v1 --branch`` output.
+
+    Args:
+        stdout: Raw stdout from the git status command.
+
+    Returns:
+        Parsed :class:`GitStatus`.
+    """
+    lines = [line for line in stdout.split("\n") if line.rstrip()]
+    if not lines:
+        return GitStatus()
+
+    status = GitStatus()
+
+    branch_line = lines[0]
+    if branch_line.startswith("## "):
+        _parse_branch_line(branch_line[3:], status)
+
+    for line in lines[1:]:
+        if line.startswith("?? "):
+            status.files.append(
+                FileStatus(
+                    path=line[3:],
+                    index_status="?",
+                    work_tree_status="?",
+                )
+            )
+            continue
+
+        if len(line) < 4:
+            continue
+
+        idx = line[0]
+        wt = line[1]
+        path = line[3:]
+        renamed_from = None
+        if " -> " in path:
+            renamed_from, path = path.split(" -> ", 1)
+
+        status.files.append(
+            FileStatus(
+                path=path,
+                index_status=idx,
+                work_tree_status=wt,
+                renamed_from=renamed_from,
+            )
+        )
+
+    return status
+
+
+def parse_branches(stdout: str) -> list[GitBranch]:
+    """Parse ``git branch --format=%(refname:short)\\t%(HEAD)`` output.
+
+    Args:
+        stdout: Raw stdout from the git branch command.
+
+    Returns:
+        List of :class:`GitBranch`.
+    """
+    branches: list[GitBranch] = []
+    for line in stdout.split("\n"):
+        line = line.strip()
+        if not line:
+            continue
+        parts = line.split("\t")
+        name = parts[0]
+        is_current = len(parts) > 1 and parts[1] == "*"
+        branches.append(GitBranch(name=name, is_current=is_current))
+    return branches
+
+
+# ── Internal helpers ───────────────────────────────────────────────
+
+
+def _resolve_scope_flag(scope: str) -> str:
+    """Convert a scope name to a git config flag."""
+    scope = scope.strip().lower()
+    if scope == "local":
+        return "--local"
+    if scope == "global":
+        return "--global"
+    if scope == "system":
+        return "--system"
+    raise ValueError("Git config scope must be one of: local, global, system.")
+
+
+def _parse_branch_line(info: str, status: GitStatus) -> None:
+    """Parse the ``## branch...upstream [ahead N, behind M]`` header."""
+    ahead_start = info.find(" [")
+    branch_part = info if ahead_start == -1 else info[:ahead_start]
+    ahead_part = None if ahead_start == -1 else info[ahead_start + 2 : -1]
+
+    if branch_part.startswith("HEAD (detached at "):
+        status.detached = True
+        status.branch = branch_part[18:].rstrip(")")
+    elif "detached" in branch_part or branch_part.startswith("HEAD"):
+        status.detached = True
+    elif "..." in branch_part:
+        local, remote = branch_part.split("...", 1)
+        status.branch = local or None
+        status.upstream = remote or None
+    else:
+        name = branch_part.replace("No commits yet on ", "").replace(
+            "Initial commit on ", ""
+        )
+        status.branch = name or None
+
+    if ahead_part:
+        m = re.search(r"ahead (\d+)", ahead_part)
+        if m:
+            status.ahead = int(m.group(1))
+        m = re.search(r"behind (\d+)", ahead_part)
+        if m:
+            status.behind = int(m.group(1))
+
+
+def _derive_status(index_status: str, work_tree_status: str) -> str:
+    """Derive a normalized status label from porcelain XY characters."""
+    chars = {index_status, work_tree_status}
+    if "U" in chars:
+        return "conflict"
+    if "R" in chars:
+        return "renamed"
+    if "C" in chars:
+        return "copied"
+    if "D" in chars:
+        return "deleted"
+    if "A" in chars:
+        return "added"
+    if "M" in chars:
+        return "modified"
+    if "T" in chars:
+        return "typechange"
+    if "?" in chars:
+        return "untracked"
+    return "unknown"
--- a/src/wrenn/_git/exceptions.py
+++ b/src/wrenn/_git/exceptions.py
@ -0,0 +1,28 @@
+from __future__ import annotations
+
+
+class GitError(Exception):
+    """Base exception for all git operations inside a capsule.
+
+    Not a subclass of :class:`WrennError` because git errors originate
+    from a process exit code, not an HTTP response.
+
+    Attributes:
+        message (str): Human-readable error description.
+        stderr (str): Raw stderr output from the git process.
+        exit_code (int): Process exit code.
+    """
+
+    def __init__(self, message: str, *, stderr: str = "", exit_code: int = -1) -> None:
+        self.message = message
+        self.stderr = stderr
+        self.exit_code = exit_code
+        super().__init__(message)
+
+
+class GitCommandError(GitError):
+    """A git command exited with a non-zero exit code."""
+
+
+class GitAuthError(GitError):
+    """Authentication failed when communicating with a remote."""
--- a/src/wrenn/async_capsule.py
+++ b/src/wrenn/async_capsule.py
@ -0,0 +1,417 @@
+from __future__ import annotations
+
+import asyncio
+import builtins
+import logging
+import time
+from collections.abc import AsyncIterator
+from contextlib import asynccontextmanager
+
+import httpx_ws
+
+from wrenn._git import AsyncGit
+from wrenn.capsule import _DualMethod, _build_proxy_url
+from wrenn.client import AsyncWrennClient
+from wrenn.commands import AsyncCommands
+from wrenn.files import AsyncFiles
+from wrenn.models import Capsule as CapsuleModel
+from wrenn.models import Status, Template
+from wrenn.pty import AsyncPtySession
+
+
+class AsyncCapsule:
+    """Async Wrenn capsule with e2b-compatible interface.
+
+    Create via classmethod::
+
+        capsule = await AsyncCapsule.create(template="minimal")
+
+    Use as async context manager::
+
+        async with await AsyncCapsule.create() as capsule:
+            await capsule.commands.run("echo hello")
+    """
+
+    def __init__(
+        self,
+        *,
+        _capsule_id: str,
+        _client: AsyncWrennClient,
+        _info: CapsuleModel | None = None,
+    ) -> None:
+        self._id = _capsule_id
+        self._client = _client
+        self._info = _info
+
+        self.commands = AsyncCommands(_capsule_id, _client.http)
+        self.files = AsyncFiles(_capsule_id, _client.http)
+        self.git = AsyncGit(_capsule_id, _client.http)
+
+    # ── Properties ──────────────────────────────────────────────
+
+    @property
+    def capsule_id(self) -> str:
+        """The capsule's unique identifier.
+
+        Returns:
+            str: Capsule ID assigned by the Wrenn API.
+        """
+        return self._id
+
+    @property
+    def info(self) -> CapsuleModel | None:
+        """Cached capsule metadata from the last API call.
+
+        Returns:
+            CapsuleModel | None: The last-fetched capsule model, or ``None``
+            if the capsule was connected without an initial fetch.
+        """
+        return self._info
+
+    # ── Factory classmethods ────────────────────────────────────
+
+    @classmethod
+    async def create(
+        cls,
+        template: str | None = None,
+        vcpus: int | None = None,
+        memory_mb: int | None = None,
+        timeout: int | None = None,
+        *,
+        wait: bool = False,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> AsyncCapsule:
+        """Create a new capsule.
+
+        Args:
+            template (str | None): Template name to boot from.
+            vcpus (int | None): Number of virtual CPUs.
+            memory_mb (int | None): Memory in MiB.
+            timeout (int | None): Inactivity TTL in seconds before auto-pause.
+            wait (bool): Await until the capsule reaches ``running`` status.
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+
+        Returns:
+            AsyncCapsule: A new capsule instance.
+        """
+        client = AsyncWrennClient(api_key=api_key, base_url=base_url)
+        info = await client.capsules.create(
+            template=template,
+            vcpus=vcpus,
+            memory_mb=memory_mb,
+            timeout_sec=timeout,
+        )
+        assert info.id is not None
+        capsule = cls(
+            _capsule_id=info.id,
+            _client=client,
+            _info=info,
+        )
+        if wait:
+            await capsule.wait_ready()
+        return capsule
+
+    @classmethod
+    async def connect(
+        cls,
+        capsule_id: str,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> AsyncCapsule:
+        """Connect to an existing capsule, resuming it if paused.
+
+        Args:
+            capsule_id (str): ID of the capsule to connect to.
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+
+        Returns:
+            AsyncCapsule: A capsule instance bound to the existing capsule.
+
+        Raises:
+            WrennNotFoundError: If no capsule with the given ID exists.
+        """
+        client = AsyncWrennClient(api_key=api_key, base_url=base_url)
+        info = await client.capsules.get(capsule_id)
+
+        if info.status == Status.paused:
+            await client.capsules.resume(capsule_id)
+
+        capsule = cls(
+            _capsule_id=capsule_id,
+            _client=client,
+            _info=info,
+        )
+
+        if info.status != Status.running:
+            await capsule.wait_ready()
+
+        return capsule
+
+    # ── Dual instance/static lifecycle ──────────────────────────
+
+    destroy = _DualMethod("_instance_destroy", "_static_destroy")
+    pause = _DualMethod("_instance_pause", "_static_pause")
+    resume = _DualMethod("_instance_resume", "_static_resume")
+    get_info = _DualMethod("_instance_get_info", "_static_get_info")
+
+    async def _instance_destroy(self) -> None:
+        await self._client.capsules.destroy(self._id)
+
+    @classmethod
+    async def _static_destroy(
+        cls,
+        capsule_id: str,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> None:
+        async with AsyncWrennClient(api_key=api_key, base_url=base_url) as client:
+            await client.capsules.destroy(capsule_id)
+
+    async def _instance_pause(self) -> CapsuleModel:
+        self._info = await self._client.capsules.pause(self._id)
+        return self._info
+
+    @classmethod
+    async def _static_pause(
+        cls,
+        capsule_id: str,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> CapsuleModel:
+        async with AsyncWrennClient(api_key=api_key, base_url=base_url) as client:
+            return await client.capsules.pause(capsule_id)
+
+    async def _instance_resume(self) -> CapsuleModel:
+        self._info = await self._client.capsules.resume(self._id)
+        return self._info
+
+    @classmethod
+    async def _static_resume(
+        cls,
+        capsule_id: str,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> CapsuleModel:
+        async with AsyncWrennClient(api_key=api_key, base_url=base_url) as client:
+            return await client.capsules.resume(capsule_id)
+
+    async def _instance_get_info(self) -> CapsuleModel:
+        self._info = await self._client.capsules.get(self._id)
+        return self._info
+
+    @classmethod
+    async def _static_get_info(
+        cls,
+        capsule_id: str,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> CapsuleModel:
+        async with AsyncWrennClient(api_key=api_key, base_url=base_url) as client:
+            return await client.capsules.get(capsule_id)
+
+    # ── Instance-only methods ───────────────────────────────────
+
+    async def ping(self) -> None:
+        """Reset the capsule inactivity timer.
+
+        Call this to prevent the capsule from being auto-paused when the
+        inactivity TTL is set.
+        """
+        await self._client.capsules.ping(self._id)
+
+    _POLL_INTERVALS: dict[Status, float] = {
+        Status.starting: 0.5,
+        Status.resuming: 0.5,
+        Status.pausing: 2.0,
+        Status.stopping: 1.0,
+    }
+
+    async def wait_ready(self, timeout: float = 30) -> None:
+        """Await until the capsule status is ``running``.
+
+        Polling interval adapts to the current transient status:
+        0.5 s for starting/resuming, 2 s for pausing, 1 s for stopping.
+
+        Args:
+            timeout (float): Maximum seconds to wait. Defaults to ``30``.
+
+        Raises:
+            TimeoutError: If the capsule does not reach ``running`` state
+                within ``timeout`` seconds.
+            RuntimeError: If the capsule enters an error, stopped, or paused
+                state while waiting.
+        """
+        deadline = time.monotonic() + timeout
+        while time.monotonic() < deadline:
+            info = await self._client.capsules.get(self._id)
+            if info.status == Status.running:
+                self._info = info
+                return
+            if info.status in (Status.error, Status.stopped):
+                raise RuntimeError(f"Capsule entered {info.status} state while waiting")
+            if info.status == Status.paused:
+                await self._client.capsules.resume(self._id)
+            interval = (
+                self._POLL_INTERVALS.get(info.status, 0.5) if info.status else 0.5
+            )
+            await asyncio.sleep(interval)
+        raise TimeoutError(f"Capsule {self._id} did not become ready within {timeout}s")
+
+    async def is_running(self) -> bool:
+        """Check whether the capsule is currently running.
+
+        Makes a live API call to fetch current status.
+
+        Returns:
+            bool: ``True`` if the capsule status is ``running``.
+        """
+        info = await self._instance_get_info()
+        return info.status == Status.running
+
+    # ── Static list ─────────────────────────────────────────────
+
+    @classmethod
+    async def list(
+        cls,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> list[CapsuleModel]:
+        """List all capsules belonging to the team.
+
+        Args:
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+
+        Returns:
+            list[CapsuleModel]: All capsules for the authenticated team.
+        """
+        async with AsyncWrennClient(api_key=api_key, base_url=base_url) as client:
+            return await client.capsules.list()
+
+    # ── PTY ─────────────────────────────────────────────────────
+
+    @asynccontextmanager
+    async def pty(
+        self,
+        cmd: str = "/bin/bash",
+        args: builtins.list[str] | None = None,
+        cols: int = 80,
+        rows: int = 24,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+    ) -> AsyncIterator[AsyncPtySession]:
+        """Open an async interactive PTY session backed by a WebSocket.
+
+        Use as an async context manager and async iterate over
+        :class:`PtyEvent` objects::
+
+            async with capsule.pty() as term:
+                await term.write(b"echo hello\\n")
+                async for event in term:
+                    if event.type == "output":
+                        print(event.data.decode())
+
+        Args:
+            cmd (str): Command to run inside the PTY. Defaults to
+                ``"/bin/bash"``.
+            args (list[str] | None): Additional arguments for ``cmd``.
+            cols (int): Initial terminal column count. Defaults to ``80``.
+            rows (int): Initial terminal row count. Defaults to ``24``.
+            envs (dict[str, str] | None): Additional environment variables
+                to inject into the process.
+            cwd (str | None): Working directory for the process.
+
+        Yields:
+            AsyncPtySession: An interactive async PTY session.
+        """
+        async with httpx_ws.aconnect_ws(
+            f"/v1/capsules/{self._id}/pty", client=self._client.http
+        ) as ws:  # type: httpx_ws.AsyncWebSocketSession
+            session = AsyncPtySession(ws, self._id)
+            await session._send_start(
+                cmd=cmd, args=args, cols=cols, rows=rows, envs=envs, cwd=cwd
+            )
+            yield session
+
+    @asynccontextmanager
+    async def pty_connect(self, tag: str) -> AsyncIterator[AsyncPtySession]:
+        """Reconnect to an existing PTY session by tag.
+
+        Args:
+            tag (str): Session tag returned in the ``started`` PTY event.
+
+        Yields:
+            AsyncPtySession: The reconnected async PTY session.
+        """
+        async with httpx_ws.aconnect_ws(
+            f"/v1/capsules/{self._id}/pty", client=self._client.http
+        ) as ws:  # type: httpx_ws.AsyncWebSocketSession
+            session = AsyncPtySession(ws, self._id)
+            await session._send_connect(tag)
+            yield session
+
+    # ── Proxy helpers ───────────────────────────────────────────
+
+    def get_url(self, port: int) -> str:
+        """Get the proxy URL for a port exposed inside this capsule.
+
+        Args:
+            port (int): Port number to proxy.
+
+        Returns:
+            str: A ``wss://`` (or ``ws://``) URL that proxies to the given
+            port inside the capsule.
+        """
+        return _build_proxy_url(self._client._base_url, self._id, port)
+
+    # ── Snapshots ───────────────────────────────────────────────
+
+    async def create_snapshot(
+        self, name: str | None = None, overwrite: bool = False
+    ) -> Template:
+        """Create a snapshot template from this capsule's current state.
+
+        Args:
+            name (str | None): Name for the snapshot template. Auto-generated
+                if not provided.
+            overwrite (bool): If ``True``, overwrite an existing template with
+                the same name. Defaults to ``False``.
+
+        Returns:
+            Template: The created snapshot template.
+        """
+        return await self._client.snapshots.create(
+            capsule_id=self._id, name=name, overwrite=overwrite
+        )
+
+    # ── Context manager ─────────────────────────────────────────
+
+    async def __aenter__(self) -> AsyncCapsule:
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: object,
+    ) -> None:
+        try:
+            await self._instance_destroy()
+        except Exception as exc:
+            logging.warning("Failed to destroy capsule %s: %s", self._id, exc)
+        try:
+            await self._client.aclose()
+        except Exception:
+            pass
--- a/src/wrenn/capsule.py
+++ b/src/wrenn/capsule.py
--- a/src/wrenn/client.py
+++ b/src/wrenn/client.py
--- a/src/wrenn/code_interpreter/init.py
+++ b/src/wrenn/code_interpreter/init.py
@ -0,0 +1,35 @@
+from wrenn.code_interpreter.async_capsule import AsyncCapsule
+from wrenn.code_interpreter.capsule import Capsule
+from wrenn.code_interpreter.models import (
+    Execution,
+    ExecutionError,
+    Logs,
+    Result,
+)
+
+__all__ = [
+    "AsyncCapsule",
+    "Capsule",
+    "Execution",
+    "ExecutionError",
+    "Logs",
+    "Result",
+    "Sandbox",
+]
+
+
+def __getattr__(name: str) -> type:
+    import sys
+    import warnings
+
+    _module = sys.modules[__name__]
+
+    if name == "Sandbox":
+        warnings.warn(
+            "'Sandbox' is deprecated, use 'Capsule' instead",
+            FutureWarning,
+            stacklevel=2,
+        )
+        setattr(_module, name, Capsule)
+        return Capsule
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
--- a/src/wrenn/code_interpreter/async_capsule.py
+++ b/src/wrenn/code_interpreter/async_capsule.py
@ -0,0 +1,292 @@
+from __future__ import annotations
+
+import asyncio
+import json
+import time
+import uuid
+from collections.abc import Callable
+from typing import Any
+
+import httpx
+import httpx_ws
+
+from wrenn.async_capsule import AsyncCapsule as BaseAsyncCapsule
+from wrenn.capsule import _build_proxy_url
+from wrenn.client import AsyncWrennClient
+from wrenn.code_interpreter.capsule import DEFAULT_TEMPLATE
+from wrenn.code_interpreter.models import (
+    Execution,
+    ExecutionError,
+    Result,
+)
+
+
+class AsyncCapsule(BaseAsyncCapsule):
+    """Async code interpreter capsule with ``run_code`` support.
+
+    Uses ``code-runner-beta`` template by default::
+
+        from wrenn.code_interpreter import AsyncCapsule
+
+        capsule = await AsyncCapsule.create()
+        result = await capsule.run_code("print('hello')")
+    """
+
+    _kernel_id: str | None
+    _proxy_client: httpx.AsyncClient | None
+
+    def __init__(self, **kwargs) -> None:
+        super().__init__(**kwargs)
+        self._kernel_id = None
+        self._proxy_client = None
+
+    async def close(self) -> None:
+        if self._proxy_client is not None:
+            try:
+                await self._proxy_client.aclose()
+            except Exception:
+                pass
+            self._proxy_client = None
+
+    def __del__(self) -> None:
+        if self._proxy_client is not None:
+            try:
+                import asyncio
+
+                loop = asyncio.get_event_loop()
+                if loop.is_running():
+                    loop.create_task(self._proxy_client.aclose())
+                else:
+                    loop.run_until_complete(self._proxy_client.aclose())
+            except Exception:
+                pass
+            self._proxy_client = None
+
+    @classmethod
+    async def create(
+        cls,
+        template: str | None = None,
+        vcpus: int | None = None,
+        memory_mb: int | None = None,
+        timeout: int | None = None,
+        *,
+        wait: bool = False,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> AsyncCapsule:
+        """Create a new async code interpreter capsule.
+
+        Args:
+            template (str | None): Template to boot from. Defaults to
+                ``"code-runner-beta"``.
+            vcpus (int | None): Number of virtual CPUs.
+            memory_mb (int | None): Memory in MiB.
+            timeout (int | None): Inactivity TTL in seconds before auto-pause.
+            wait (bool): Await until the capsule reaches ``running`` status.
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+
+        Returns:
+            AsyncCapsule: A new async code interpreter capsule instance.
+        """
+        client = AsyncWrennClient(api_key=api_key, base_url=base_url)
+        info = await client.capsules.create(
+            template=template or DEFAULT_TEMPLATE,
+            vcpus=vcpus,
+            memory_mb=memory_mb,
+            timeout_sec=timeout,
+        )
+        capsule = cls(
+            _capsule_id=info.id,
+            _client=client,
+            _info=info,
+        )
+        if wait:
+            await capsule.wait_ready()
+        return capsule
+
+    def _get_proxy_client(self) -> httpx.AsyncClient:
+        if self._proxy_client is None:
+            url = (
+                _build_proxy_url(self._client._base_url, self._id, 8888)
+                .replace("ws://", "http://")
+                .replace("wss://", "https://")
+            )
+            self._proxy_client = httpx.AsyncClient(
+                base_url=url,
+                headers={"X-API-Key": self._client._api_key},
+            )
+        return self._proxy_client
+
+    async def _ensure_kernel(self, jupyter_timeout: float = 30) -> str:
+        if self._kernel_id is not None:
+            return self._kernel_id
+
+        client = self._get_proxy_client()
+        deadline = time.monotonic() + jupyter_timeout
+        last_exc: Exception | None = None
+
+        while time.monotonic() < deadline:
+            try:
+                # Try to reuse an existing kernel
+                resp = await client.get("/api/kernels")
+                if resp.status_code < 500:
+                    resp.raise_for_status()
+                    kernels = resp.json()
+                    if kernels:
+                        self._kernel_id = kernels[0]["id"]
+                        return self._kernel_id
+                    # No existing kernels, create a new one
+                    resp = await client.post("/api/kernels")
+                    if resp.status_code < 500:
+                        resp.raise_for_status()
+                        self._kernel_id = resp.json()["id"]
+                        return self._kernel_id
+                last_exc = httpx.HTTPStatusError(
+                    f"Jupyter returned {resp.status_code}",
+                    request=resp.request,
+                    response=resp,
+                )
+            except httpx.HTTPStatusError as exc:
+                if exc.response.status_code < 500:
+                    raise
+                last_exc = exc
+            except Exception as exc:
+                last_exc = exc
+            await asyncio.sleep(0.5)
+
+        raise TimeoutError(
+            f"Jupyter not available within {jupyter_timeout}s: {last_exc}"
+        )
+
+    def _jupyter_ws_url(self, kernel_id: str) -> str:
+        proxy = _build_proxy_url(self._client._base_url, self._id, 8888)
+        return f"{proxy}/api/kernels/{kernel_id}/channels"
+
+    @staticmethod
+    def _jupyter_execute_request(code: str) -> dict:
+        msg_id = str(uuid.uuid4())
+        return {
+            "header": {
+                "msg_id": msg_id,
+                "msg_type": "execute_request",
+                "username": "wrenn-sdk",
+                "session": str(uuid.uuid4()),
+                "date": time.strftime("%Y-%m-%dT%H:%M:%S.000Z", time.gmtime()),
+                "version": "5.3",
+            },
+            "parent_header": {},
+            "metadata": {},
+            "content": {
+                "code": code,
+                "silent": False,
+                "store_history": True,
+                "user_expressions": {},
+                "allow_stdin": False,
+                "stop_on_error": True,
+            },
+            "buffers": [],
+            "channel": "shell",
+        }
+
+    async def run_code(
+        self,
+        code: str,
+        language: str = "python",
+        timeout: float = 30,
+        jupyter_timeout: float = 30,
+        on_result: Callable[[Result], Any] | None = None,
+        on_stdout: Callable[[str], Any] | None = None,
+        on_stderr: Callable[[str], Any] | None = None,
+        on_error: Callable[[ExecutionError], Any] | None = None,
+    ) -> Execution:
+        """Execute code in a persistent Jupyter kernel (async).
+
+        Args:
+            code: Code string to execute.
+            language: Execution backend language. Currently only ``"python"``.
+            timeout: Maximum seconds to wait for execution to complete.
+            jupyter_timeout: Maximum seconds to wait for Jupyter to become
+                available.
+            on_result: Called for each rich output (charts, images, expression
+                values).
+            on_stdout: Called for each stdout chunk.
+            on_stderr: Called for each stderr chunk.
+            on_error: Called when the cell raises an exception.
+
+        Returns:
+            An :class:`Execution` with ``.results``, ``.logs``, ``.error``,
+            and a convenience ``.text`` property.
+        """
+        kernel_id = await self._ensure_kernel(jupyter_timeout=jupyter_timeout)
+        ws_url = self._jupyter_ws_url(kernel_id)
+
+        msg = self._jupyter_execute_request(code)
+        msg_id = msg["header"]["msg_id"]
+
+        execution = Execution()
+        deadline = time.monotonic() + timeout
+        headers = {"X-API-Key": self._client._api_key}
+
+        async with httpx_ws.aconnect_ws(ws_url, headers=headers) as ws:  # type: httpx_ws.AsyncWebSocketSession
+            await ws.send_text(json.dumps(msg))
+            while time.monotonic() < deadline:
+                time_left = deadline - time.monotonic()
+                if time_left <= 0:
+                    break
+                try:
+                    data = await asyncio.wait_for(ws.receive_json(), timeout=time_left)
+                except Exception:
+                    break
+                if not data:
+                    break
+                parent = data.get("parent_header", {}).get("msg_id")
+                if parent != msg_id:
+                    continue
+                msg_type = data.get("msg_type") or data.get("header", {}).get(
+                    "msg_type"
+                )
+                content = data.get("content", {})
+
+                if msg_type == "stream":
+                    text = content.get("text", "")
+                    name = content.get("name", "stdout")
+                    if name == "stderr":
+                        execution.logs.stderr.append(text)
+                        if on_stderr is not None:
+                            on_stderr(text)
+                    else:
+                        execution.logs.stdout.append(text)
+                        if on_stdout is not None:
+                            on_stdout(text)
+                elif msg_type in ("execute_result", "display_data"):
+                    bundle = content.get("data", {})
+                    is_main = msg_type == "execute_result"
+                    result = Result.from_bundle(bundle, is_main_result=is_main)
+                    execution.results.append(result)
+                    if is_main:
+                        execution.execution_count = content.get("execution_count")
+                    if on_result is not None:
+                        on_result(result)
+                elif msg_type == "error":
+                    err = ExecutionError(
+                        name=content.get("ename", ""),
+                        value=content.get("evalue", ""),
+                        traceback="\n".join(content.get("traceback", [])),
+                    )
+                    execution.error = err
+                    if on_error is not None:
+                        on_error(err)
+                elif msg_type == "status" and content.get("execution_state") == "idle":
+                    break
+
+        return execution
+
+    async def __aexit__(self, *args) -> None:
+        if self._proxy_client is not None:
+            try:
+                await self._proxy_client.aclose()
+            except Exception:
+                pass
+        await super().__aexit__(*args)
--- a/src/wrenn/code_interpreter/capsule.py
+++ b/src/wrenn/code_interpreter/capsule.py
@ -0,0 +1,307 @@
+from __future__ import annotations
+
+import json
+import time
+import uuid
+from collections.abc import Callable
+from typing import Any
+
+import httpx
+import httpx_ws
+
+from wrenn.capsule import Capsule as BaseCapsule
+from wrenn.capsule import _build_proxy_url
+from wrenn.code_interpreter.models import (
+    Execution,
+    ExecutionError,
+    Result,
+)
+
+DEFAULT_TEMPLATE = "code-runner-beta"
+
+
+class Capsule(BaseCapsule):
+    """Code interpreter capsule with ``run_code`` support.
+
+    Uses ``code-runner-beta`` template by default::
+
+        from wrenn.code_interpreter import Capsule
+
+        capsule = Capsule()
+        result = capsule.run_code("print('hello')")
+        print(result.logs.stdout)  # ["hello\\n"]
+    """
+
+    _kernel_id: str | None
+    _proxy_client: httpx.Client | None
+
+    def __init__(
+        self,
+        template: str | None = None,
+        vcpus: int | None = None,
+        memory_mb: int | None = None,
+        timeout: int | None = None,
+        *,
+        api_key: str | None = None,
+        base_url: str | None = None,
+        **kwargs,
+    ) -> None:
+        """Create a code interpreter capsule.
+
+        Args:
+            template (str | None): Template to boot from. Defaults to
+                ``"code-runner-beta"``.
+            vcpus (int | None): Number of virtual CPUs.
+            memory_mb (int | None): Memory in MiB.
+            timeout (int | None): Inactivity TTL in seconds before auto-pause.
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+        """
+        super().__init__(
+            template=template or DEFAULT_TEMPLATE,
+            vcpus=vcpus,
+            memory_mb=memory_mb,
+            timeout=timeout,
+            api_key=api_key,
+            base_url=base_url,
+            **kwargs,
+        )
+        self._kernel_id = None
+        self._proxy_client = None
+
+    def close(self) -> None:
+        if self._proxy_client is not None:
+            try:
+                self._proxy_client.close()
+            except Exception:
+                pass
+            self._proxy_client = None
+
+    def __del__(self) -> None:
+        self.close()
+
+    @classmethod
+    def create(
+        cls,
+        template: str | None = None,
+        vcpus: int | None = None,
+        memory_mb: int | None = None,
+        timeout: int | None = None,
+        *,
+        wait: bool = False,
+        api_key: str | None = None,
+        base_url: str | None = None,
+    ) -> Capsule:
+        """Create a new code interpreter capsule.
+
+        Args:
+            template (str | None): Template to boot from. Defaults to
+                ``"code-runner-beta"``.
+            vcpus (int | None): Number of virtual CPUs.
+            memory_mb (int | None): Memory in MiB.
+            timeout (int | None): Inactivity TTL in seconds before auto-pause.
+            wait (bool): Block until the capsule reaches ``running`` status.
+            api_key (str | None): Wrenn API key. Falls back to
+                ``WRENN_API_KEY`` env var.
+            base_url (str | None): API base URL override.
+
+        Returns:
+            Capsule: A new code interpreter capsule instance.
+        """
+        return cls(
+            template=template or DEFAULT_TEMPLATE,
+            vcpus=vcpus,
+            memory_mb=memory_mb,
+            timeout=timeout,
+            wait=wait,
+            api_key=api_key,
+            base_url=base_url,
+        )
+
+    def _get_proxy_client(self) -> httpx.Client:
+        if self._proxy_client is None:
+            url = (
+                _build_proxy_url(self._client._base_url, self._id, 8888)
+                .replace("ws://", "http://")
+                .replace("wss://", "https://")
+            )
+            self._proxy_client = httpx.Client(
+                base_url=url,
+                headers={"X-API-Key": self._client._api_key},
+            )
+        return self._proxy_client
+
+    def _ensure_kernel(self, jupyter_timeout: float = 30) -> str:
+        if self._kernel_id is not None:
+            return self._kernel_id
+
+        client = self._get_proxy_client()
+        deadline = time.monotonic() + jupyter_timeout
+        last_exc: Exception | None = None
+
+        while time.monotonic() < deadline:
+            try:
+                # Try to reuse an existing kernel
+                resp = client.get("/api/kernels")
+                if resp.status_code < 500:
+                    resp.raise_for_status()
+                    kernels = resp.json()
+                    if kernels:
+                        self._kernel_id = kernels[0]["id"]
+                        return self._kernel_id
+                    # No existing kernels, create a new one
+                    resp = client.post("/api/kernels")
+                    if resp.status_code < 500:
+                        resp.raise_for_status()
+                        self._kernel_id = resp.json()["id"]
+                        return self._kernel_id
+                last_exc = httpx.HTTPStatusError(
+                    f"Jupyter returned {resp.status_code}",
+                    request=resp.request,
+                    response=resp,
+                )
+            except httpx.HTTPStatusError as exc:
+                if exc.response.status_code < 500:
+                    raise
+                last_exc = exc
+            except Exception as exc:
+                last_exc = exc
+            time.sleep(0.5)
+
+        raise TimeoutError(
+            f"Jupyter not available within {jupyter_timeout}s: {last_exc}"
+        )
+
+    def _jupyter_ws_url(self, kernel_id: str) -> str:
+        proxy = _build_proxy_url(self._client._base_url, self._id, 8888)
+        return f"{proxy}/api/kernels/{kernel_id}/channels"
+
+    @staticmethod
+    def _jupyter_execute_request(code: str) -> dict:
+        msg_id = str(uuid.uuid4())
+        return {
+            "header": {
+                "msg_id": msg_id,
+                "msg_type": "execute_request",
+                "username": "wrenn-sdk",
+                "session": str(uuid.uuid4()),
+                "date": time.strftime("%Y-%m-%dT%H:%M:%S.000Z", time.gmtime()),
+                "version": "5.3",
+            },
+            "parent_header": {},
+            "metadata": {},
+            "content": {
+                "code": code,
+                "silent": False,
+                "store_history": True,
+                "user_expressions": {},
+                "allow_stdin": False,
+                "stop_on_error": True,
+            },
+            "buffers": [],
+            "channel": "shell",
+        }
+
+    def run_code(
+        self,
+        code: str,
+        language: str = "python",
+        timeout: float = 30,
+        jupyter_timeout: float = 30,
+        on_result: Callable[[Result], Any] | None = None,
+        on_stdout: Callable[[str], Any] | None = None,
+        on_stderr: Callable[[str], Any] | None = None,
+        on_error: Callable[[ExecutionError], Any] | None = None,
+    ) -> Execution:
+        """Execute code in a persistent Jupyter kernel.
+
+        Variables, imports, and function definitions survive across calls.
+
+        Args:
+            code: Code string to execute.
+            language: Execution backend language. Currently only ``"python"``.
+            timeout: Maximum seconds to wait for execution to complete.
+            jupyter_timeout: Maximum seconds to wait for Jupyter to become
+                available.
+            on_result: Called for each rich output (charts, images, expression
+                values).
+            on_stdout: Called for each stdout chunk.
+            on_stderr: Called for each stderr chunk.
+            on_error: Called when the cell raises an exception.
+
+        Returns:
+            An :class:`Execution` with ``.results``, ``.logs``, ``.error``,
+            and a convenience ``.text`` property.
+        """
+        kernel_id = self._ensure_kernel(jupyter_timeout=jupyter_timeout)
+        ws_url = self._jupyter_ws_url(kernel_id)
+
+        msg = self._jupyter_execute_request(code)
+        msg_id = msg["header"]["msg_id"]
+
+        execution = Execution()
+        deadline = time.monotonic() + timeout
+        headers = {"X-API-Key": self._client._api_key}
+
+        with httpx_ws.connect_ws(ws_url, headers=headers) as ws:  # type: httpx_ws.WebSocketSession
+            ws.send_text(json.dumps(msg))
+            while time.monotonic() < deadline:
+                time_left = deadline - time.monotonic()
+                if time_left <= 0:
+                    break
+                try:
+                    data = ws.receive_json(timeout=time_left)
+                except Exception:
+                    break
+                if not data:
+                    break
+                parent = data.get("parent_header", {}).get("msg_id")
+                if parent != msg_id:
+                    continue
+                msg_type = data.get("msg_type") or data.get("header", {}).get(
+                    "msg_type"
+                )
+                content = data.get("content", {})
+
+                if msg_type == "stream":
+                    text = content.get("text", "")
+                    name = content.get("name", "stdout")
+                    if name == "stderr":
+                        execution.logs.stderr.append(text)
+                        if on_stderr is not None:
+                            on_stderr(text)
+                    else:
+                        execution.logs.stdout.append(text)
+                        if on_stdout is not None:
+                            on_stdout(text)
+                elif msg_type in ("execute_result", "display_data"):
+                    bundle = content.get("data", {})
+                    is_main = msg_type == "execute_result"
+                    result = Result.from_bundle(bundle, is_main_result=is_main)
+                    execution.results.append(result)
+                    if is_main:
+                        execution.execution_count = content.get("execution_count")
+                    if on_result is not None:
+                        on_result(result)
+                elif msg_type == "error":
+                    err = ExecutionError(
+                        name=content.get("ename", ""),
+                        value=content.get("evalue", ""),
+                        traceback="\n".join(content.get("traceback", [])),
+                    )
+                    execution.error = err
+                    if on_error is not None:
+                        on_error(err)
+                elif msg_type == "status" and content.get("execution_state") == "idle":
+                    break
+
+        return execution
+
+    def __exit__(self, *args) -> None:
+        if self._proxy_client is not None:
+            try:
+                self._proxy_client.close()
+            except Exception:
+                pass
+        super().__exit__(*args)
--- a/src/wrenn/code_interpreter/models.py
+++ b/src/wrenn/code_interpreter/models.py
@ -0,0 +1,156 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+_MIME_MAP: dict[str, str] = {
+    "text/plain": "text",
+    "text/html": "html",
+    "text/markdown": "markdown",
+    "image/svg+xml": "svg",
+    "image/png": "png",
+    "image/jpeg": "jpeg",
+    "application/pdf": "pdf",
+    "text/latex": "latex",
+    "application/json": "json",
+    "application/javascript": "javascript",
+}
+
+
+@dataclass
+class ExecutionError:
+    """Error raised during code execution.
+
+    Attributes:
+        name: Exception class name (e.g. ``"NameError"``).
+        value: Exception message.
+        traceback: Full traceback string.
+    """
+
+    name: str = ""
+    value: str = ""
+    traceback: str = ""
+
+
+@dataclass
+class Logs:
+    """Captured stdout/stderr streams.
+
+    Each element in the list is one chunk of text as it arrived from
+    the kernel.
+    """
+
+    stdout: list[str] = field(default_factory=list)
+    stderr: list[str] = field(default_factory=list)
+
+
+@dataclass
+class Result:
+    """A single rich output from code execution.
+
+    Jupyter cells can produce multiple outputs — one ``execute_result``
+    (the expression value) and zero or more ``display_data`` messages
+    (from ``plt.show()``, ``display()``, etc.).  Each becomes a
+    ``Result``.
+
+    Known MIME types are unpacked into named attributes; anything else
+    lands in :pyattr:`extra`.
+    """
+
+    # --- MIME type fields ---
+    text: str | None = None
+    """``text/plain`` representation."""
+    html: str | None = None
+    """``text/html`` representation."""
+    markdown: str | None = None
+    """``text/markdown`` representation."""
+    svg: str | None = None
+    """``image/svg+xml`` representation."""
+    png: str | None = None
+    """``image/png`` — base64-encoded."""
+    jpeg: str | None = None
+    """``image/jpeg`` — base64-encoded."""
+    pdf: str | None = None
+    """``application/pdf`` — base64-encoded."""
+    latex: str | None = None
+    """``text/latex`` representation."""
+    json: dict | None = None
+    """``application/json`` representation."""
+    javascript: str | None = None
+    """``application/javascript`` representation."""
+    extra: dict[str, str] | None = None
+    """MIME types not covered by the named fields above."""
+
+    is_main_result: bool = False
+    """``True`` when this came from an ``execute_result`` message
+    (i.e. the value of the last expression in the cell).  ``False``
+    for ``display_data`` outputs."""
+
+    @classmethod
+    def from_bundle(
+        cls, bundle: dict[str, str], *, is_main_result: bool = False
+    ) -> Result:
+        """Build a ``Result`` from a Jupyter MIME bundle dict."""
+        kwargs: dict = {"is_main_result": is_main_result}
+        extra: dict[str, str] = {}
+        for mime, value in bundle.items():
+            attr = _MIME_MAP.get(mime)
+            if attr is not None:
+                kwargs[attr] = value
+            else:
+                extra[mime] = value
+        if extra:
+            kwargs["extra"] = extra
+        # Strip surrounding quotes from text/plain (Jupyter repr artefact)
+        text = kwargs.get("text")
+        if isinstance(text, str) and len(text) >= 2:
+            if (text[0] == text[-1]) and text[0] in ("'", '"'):
+                kwargs["text"] = text[1:-1]
+        return cls(**kwargs)
+
+    def formats(self) -> list[str]:
+        """Return names of non-``None`` MIME-type fields."""
+        out: list[str] = []
+        for attr in (
+            "text",
+            "html",
+            "markdown",
+            "svg",
+            "png",
+            "jpeg",
+            "pdf",
+            "latex",
+            "json",
+            "javascript",
+        ):
+            if getattr(self, attr) is not None:
+                out.append(attr)
+        if self.extra:
+            out.extend(self.extra)
+        return out
+
+
+@dataclass
+class Execution:
+    """Complete result of a ``run_code`` call.
+
+    Attributes:
+        results: All rich outputs produced by the cell — charts, tables,
+            images, expression values, etc.
+        logs: Captured stdout/stderr text.
+        error: Populated when the cell raised an exception.
+        execution_count: Jupyter execution counter (the ``[N]`` number).
+    """
+
+    results: list[Result] = field(default_factory=list)
+    logs: Logs = field(default_factory=Logs)
+    error: ExecutionError | None = None
+    execution_count: int | None = None
+
+    @property
+    def text(self) -> str | None:
+        """Convenience — ``text/plain`` of the main ``execute_result``,
+        or ``None`` if the cell had no expression value."""
+        for r in self.results:
+            if r.is_main_result:
+                return r.text
+        return None
--- a/src/wrenn/commands.py
+++ b/src/wrenn/commands.py
@ -0,0 +1,501 @@
+from __future__ import annotations
+
+import base64
+import builtins
+import json
+from collections.abc import AsyncIterator, Iterator
+from dataclasses import dataclass
+from typing import Literal, overload
+
+import httpx
+import httpx_ws
+
+from wrenn.exceptions import handle_response
+
+
+@dataclass
+class CommandResult:
+    """Result from a foreground command execution."""
+
+    stdout: str
+    stderr: str
+    exit_code: int
+    duration_ms: int | None = None
+
+
+@dataclass
+class CommandHandle:
+    """Handle for a background process."""
+
+    pid: int
+    tag: str
+    capsule_id: str
+
+
+@dataclass
+class ProcessInfo:
+    """Information about a running process."""
+
+    pid: int
+    tag: str | None = None
+    cmd: str | None = None
+    args: list[str] | None = None
+
+
+class StreamEvent:
+    """Base class for streaming exec events."""
+
+    __slots__ = ("type",)
+
+    def __init__(self, type: str) -> None:
+        self.type = type
+
+
+class StreamStartEvent(StreamEvent):
+    __slots__ = ("pid",)
+
+    def __init__(self, pid: int) -> None:
+        super().__init__("start")
+        self.pid = pid
+
+
+class StreamStdoutEvent(StreamEvent):
+    __slots__ = ("data",)
+
+    def __init__(self, data: str) -> None:
+        super().__init__("stdout")
+        self.data = data
+
+
+class StreamStderrEvent(StreamEvent):
+    __slots__ = ("data",)
+
+    def __init__(self, data: str) -> None:
+        super().__init__("stderr")
+        self.data = data
+
+
+class StreamExitEvent(StreamEvent):
+    __slots__ = ("exit_code",)
+
+    def __init__(self, exit_code: int) -> None:
+        super().__init__("exit")
+        self.exit_code = exit_code
+
+
+class StreamErrorEvent(StreamEvent):
+    __slots__ = ("data",)
+
+    def __init__(self, data: str) -> None:
+        super().__init__("error")
+        self.data = data
+
+
+def _parse_stream_event(raw: dict) -> StreamEvent:
+    t = raw.get("type")
+    if t == "start":
+        return StreamStartEvent(pid=raw.get("pid", 0))
+    if t == "stdout":
+        return StreamStdoutEvent(data=raw.get("data", ""))
+    if t == "stderr":
+        return StreamStderrEvent(data=raw.get("data", ""))
+    if t == "exit":
+        return StreamExitEvent(exit_code=raw.get("exit_code", -1))
+    if t == "error":
+        return StreamErrorEvent(data=raw.get("data", ""))
+    return StreamEvent(type=t or "unknown")
+
+
+def _decode_exec_response(data: dict) -> CommandResult:
+    stdout = data.get("stdout") or ""
+    stderr = data.get("stderr") or ""
+    if data.get("encoding") == "base64":
+        stdout = base64.b64decode(stdout).decode("utf-8", errors="replace")
+        if stderr:
+            stderr = base64.b64decode(stderr).decode("utf-8", errors="replace")
+    return CommandResult(
+        stdout=stdout,
+        stderr=stderr,
+        exit_code=data.get("exit_code", -1),
+        duration_ms=data.get("duration_ms"),
+    )
+
+
+class Commands:
+    """Sync command execution interface. Accessed via ``capsule.commands``."""
+
+    def __init__(self, capsule_id: str, http: httpx.Client) -> None:
+        self._capsule_id = capsule_id
+        self._http = http
+
+    @overload
+    def run(
+        self,
+        cmd: str,
+        *,
+        background: Literal[False] = ...,
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandResult: ...
+
+    @overload
+    def run(
+        self,
+        cmd: str,
+        *,
+        background: Literal[True],
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandHandle: ...
+
+    def run(
+        self,
+        cmd: str,
+        *,
+        background: bool = False,
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandResult | CommandHandle:
+        """Execute a shell command inside the capsule.
+
+        Args:
+            cmd (str): Shell command string to execute.
+            background (bool): If ``True``, launch the process in the
+                background and return a :class:`CommandHandle` immediately.
+                Defaults to ``False``.
+            timeout (int | None): Seconds before the foreground command times
+                out. Ignored for background commands. Defaults to ``30``.
+            envs (dict[str, str] | None): Additional environment variables
+                to set for the process.
+            cwd (str | None): Working directory for the process.
+            tag (str | None): Optional label attached to background processes
+                for later retrieval via :meth:`connect`.
+
+        Returns:
+            CommandResult: stdout, stderr, exit code, and duration for
+            foreground commands (``background=False``).
+
+            CommandHandle: PID and tag for background commands
+            (``background=True``).
+        """
+        payload: dict = {
+            "cmd": "/bin/sh",
+            "args": ["-c", cmd],
+            "background": background,
+        }
+        if timeout is not None and not background:
+            payload["timeout_sec"] = timeout
+        if envs is not None:
+            payload["envs"] = envs
+        if cwd is not None:
+            payload["cwd"] = cwd
+        if tag is not None:
+            payload["tag"] = tag
+
+        http_timeout: httpx.Timeout | None = None
+        if not background and timeout is not None:
+            http_timeout = httpx.Timeout(timeout + 10, connect=5.0)
+
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/exec",
+            json=payload,
+            timeout=http_timeout,
+        )
+        data = handle_response(resp)
+        assert isinstance(data, dict)
+
+        if background:
+            return CommandHandle(
+                pid=data.get("pid", 0),
+                tag=data.get("tag", ""),
+                capsule_id=self._capsule_id,
+            )
+        return _decode_exec_response(data)
+
+    def list(self) -> list[ProcessInfo]:
+        """List all running background processes in the capsule.
+
+        Returns:
+            list[ProcessInfo]: Running processes with their PID, tag, and
+            command information.
+        """
+        resp = self._http.get(f"/v1/capsules/{self._capsule_id}/processes")
+        data = handle_response(resp)
+        assert isinstance(data, dict)
+        return [
+            ProcessInfo(
+                pid=p.get("pid", 0),
+                tag=p.get("tag"),
+                cmd=p.get("cmd"),
+                args=p.get("args"),
+            )
+            for p in data.get("processes", [])
+        ]
+
+    def kill(self, pid: int) -> None:
+        """Send SIGKILL to a background process.
+
+        Args:
+            pid (int): PID of the process to kill.
+
+        Raises:
+            WrennNotFoundError: If no process with the given PID exists.
+        """
+        resp = self._http.delete(f"/v1/capsules/{self._capsule_id}/processes/{pid}")
+        handle_response(resp)
+
+    def connect(self, pid: int) -> Iterator[StreamEvent]:
+        """Connect to a running background process and stream its output.
+
+        Args:
+            pid (int): PID of the background process to attach to.
+
+        Yields:
+            StreamEvent: Successive output events. Stops on
+            :class:`StreamExitEvent` or :class:`StreamErrorEvent`.
+        """
+        with httpx_ws.connect_ws(
+            f"/v1/capsules/{self._capsule_id}/processes/{pid}/stream",
+            self._http,
+        ) as ws:  # type: httpx_ws.WebSocketSession
+            while True:
+                try:
+                    raw = ws.receive_json()
+                    event = _parse_stream_event(raw)
+                    yield event
+                    if event.type in ("exit", "error"):
+                        break
+                except httpx_ws.WebSocketDisconnect:
+                    break
+
+    def stream(
+        self, cmd: str, args: builtins.list[str] | None = None
+    ) -> Iterator[StreamEvent]:
+        """Execute a command via WebSocket, streaming output as events.
+
+        Args:
+            cmd (str): Command to execute.
+            args (list[str] | None): Additional arguments for the command.
+                When omitted, *cmd* is interpreted as a shell command
+                string and executed via ``/bin/sh -c``.
+
+        Yields:
+            StreamEvent: Successive events including :class:`StreamStartEvent`,
+            :class:`StreamStdoutEvent`, :class:`StreamStderrEvent`,
+            :class:`StreamExitEvent`, and :class:`StreamErrorEvent`.
+        """
+        with httpx_ws.connect_ws(
+            f"/v1/capsules/{self._capsule_id}/exec/stream",
+            self._http,
+        ) as ws:  # type: httpx_ws.WebSocketSession
+            if args:
+                start_msg: dict = {"type": "start", "cmd": cmd, "args": args}
+            else:
+                start_msg = {"type": "start", "cmd": "/bin/sh", "args": ["-c", cmd]}
+            ws.send_text(json.dumps(start_msg))
+            while True:
+                try:
+                    raw = ws.receive_json()
+                    event = _parse_stream_event(raw)
+                    yield event
+                    if event.type in ("exit", "error"):
+                        break
+                except httpx_ws.WebSocketDisconnect:
+                    break
+
+
+class AsyncCommands:
+    """Async command execution interface. Accessed via ``capsule.commands``."""
+
+    def __init__(self, capsule_id: str, http: httpx.AsyncClient) -> None:
+        self._capsule_id = capsule_id
+        self._http = http
+
+    @overload
+    async def run(
+        self,
+        cmd: str,
+        *,
+        background: Literal[False] = ...,
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandResult: ...
+
+    @overload
+    async def run(
+        self,
+        cmd: str,
+        *,
+        background: Literal[True],
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandHandle: ...
+
+    async def run(
+        self,
+        cmd: str,
+        *,
+        background: bool = False,
+        timeout: int | None = 30,
+        envs: dict[str, str] | None = None,
+        cwd: str | None = None,
+        tag: str | None = None,
+    ) -> CommandResult | CommandHandle:
+        """Execute a shell command inside the capsule.
+
+        Args:
+            cmd (str): Shell command string to execute.
+            background (bool): If ``True``, launch the process in the
+                background and return a :class:`CommandHandle` immediately.
+                Defaults to ``False``.
+            timeout (int | None): Seconds before the foreground command times
+                out. Ignored for background commands. Defaults to ``30``.
+            envs (dict[str, str] | None): Additional environment variables
+                to set for the process.
+            cwd (str | None): Working directory for the process.
+            tag (str | None): Optional label attached to background processes
+                for later retrieval via :meth:`connect`.
+
+        Returns:
+            CommandResult: stdout, stderr, exit code, and duration for
+            foreground commands (``background=False``).
+
+            CommandHandle: PID and tag for background commands
+            (``background=True``).
+        """
+        payload: dict = {
+            "cmd": "/bin/sh",
+            "args": ["-c", cmd],
+            "background": background,
+        }
+        if timeout is not None and not background:
+            payload["timeout_sec"] = timeout
+        if envs is not None:
+            payload["envs"] = envs
+        if cwd is not None:
+            payload["cwd"] = cwd
+        if tag is not None:
+            payload["tag"] = tag
+
+        http_timeout: httpx.Timeout | None = None
+        if not background and timeout is not None:
+            http_timeout = httpx.Timeout(timeout + 10, connect=5.0)
+
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/exec",
+            json=payload,
+            timeout=http_timeout,
+        )
+        data = handle_response(resp)
+        assert isinstance(data, dict)
+
+        if background:
+            return CommandHandle(
+                pid=data.get("pid", 0),
+                tag=data.get("tag", ""),
+                capsule_id=self._capsule_id,
+            )
+        return _decode_exec_response(data)
+
+    async def list(self) -> list[ProcessInfo]:
+        """List all running background processes in the capsule.
+
+        Returns:
+            list[ProcessInfo]: Running processes with their PID, tag, and
+            command information.
+        """
+        resp = await self._http.get(f"/v1/capsules/{self._capsule_id}/processes")
+        data = handle_response(resp)
+        assert isinstance(data, dict)
+        return [
+            ProcessInfo(
+                pid=p.get("pid", 0),
+                tag=p.get("tag"),
+                cmd=p.get("cmd"),
+                args=p.get("args"),
+            )
+            for p in data.get("processes", [])
+        ]
+
+    async def kill(self, pid: int) -> None:
+        """Send SIGKILL to a background process.
+
+        Args:
+            pid (int): PID of the process to kill.
+
+        Raises:
+            WrennNotFoundError: If no process with the given PID exists.
+        """
+        resp = await self._http.delete(
+            f"/v1/capsules/{self._capsule_id}/processes/{pid}"
+        )
+        handle_response(resp)
+
+    async def connect(self, pid: int) -> AsyncIterator[StreamEvent]:
+        """Connect to a running background process and stream its output.
+
+        Args:
+            pid (int): PID of the background process to attach to.
+
+        Yields:
+            StreamEvent: Successive output events. Stops on
+            :class:`StreamExitEvent` or :class:`StreamErrorEvent`.
+        """
+        async with httpx_ws.aconnect_ws(
+            f"/v1/capsules/{self._capsule_id}/processes/{pid}/stream",
+            self._http,
+        ) as ws:  # type: httpx_ws.AsyncWebSocketSession
+            try:
+                while True:
+                    raw = await ws.receive_json()
+                    event = _parse_stream_event(raw)
+                    yield event
+                    if event.type in ("exit", "error"):
+                        break
+            except httpx_ws.WebSocketDisconnect:
+                pass
+
+    async def stream(
+        self, cmd: str, args: builtins.list[str] | None = None
+    ) -> AsyncIterator[StreamEvent]:
+        """Execute a command via WebSocket, streaming output as events.
+
+        Args:
+            cmd (str): Command to execute.
+            args (list[str] | None): Additional arguments for the command.
+                When omitted, *cmd* is interpreted as a shell command
+                string and executed via ``/bin/sh -c``.
+
+        Yields:
+            StreamEvent: Successive events including :class:`StreamStartEvent`,
+            :class:`StreamStdoutEvent`, :class:`StreamStderrEvent`,
+            :class:`StreamExitEvent`, and :class:`StreamErrorEvent`.
+        """
+        async with httpx_ws.aconnect_ws(
+            f"/v1/capsules/{self._capsule_id}/exec/stream",
+            self._http,
+        ) as ws:  # type: httpx_ws.AsyncWebSocketSession
+            if args:
+                start_msg: dict = {"type": "start", "cmd": cmd, "args": args}
+            else:
+                start_msg = {"type": "start", "cmd": "/bin/sh", "args": ["-c", cmd]}
+            await ws.send_text(json.dumps(start_msg))
+            try:
+                while True:
+                    raw = await ws.receive_json()
+                    event = _parse_stream_event(raw)
+                    yield event
+                    if event.type in ("exit", "error"):
+                        break
+            except httpx_ws.WebSocketDisconnect:
+                pass
--- a/src/wrenn/exceptions.py
+++ b/src/wrenn/exceptions.py
@ -6,9 +6,26 @@ import httpx


 class WrennError(Exception):
-    """Base exception for all Wrenn SDK errors."""
+    """Base exception for all Wrenn SDK errors.
+
+    All SDK exceptions inherit from this class, so you can catch
+    ``WrennError`` to handle any API error generically.
+
+    Attributes:
+        code (str): Machine-readable error code from the API
+            (e.g. ``"not_found"``).
+        message (str): Human-readable error description.
+        status_code (int): HTTP status code of the response.
+    """

    def __init__(self, code: str, message: str, status_code: int) -> None:
+        """Initialize a WrennError.
+
+        Args:
+            code (str): Machine-readable error code.
+            message (str): Human-readable error description.
+            status_code (int): HTTP status code of the response.
+        """
        self.code = code
        self.message = message
        self.status_code = status_code
@ -36,11 +53,23 @@ class WrennConflictError(WrennError):


 class WrennHostHasCapsulesError(WrennConflictError):
-    """409 — Host still has running capsules."""
+    """409 — Host still has running capsules.
+
+    Attributes:
+        capsule_ids (list[str]): IDs of the capsules still running on the host.
+    """

    def __init__(
        self, code: str, message: str, status_code: int, capsule_ids: list[str]
    ) -> None:
+        """Initialize a WrennHostHasCapsulesError.
+
+        Args:
+            code (str): Machine-readable error code.
+            message (str): Human-readable error description.
+            status_code (int): HTTP status code of the response.
+            capsule_ids (list[str]): IDs of capsules still on the host.
+        """
        self.capsule_ids = capsule_ids
        super().__init__(code, message, status_code)

@ -81,13 +110,18 @@ _ERROR_MAP: dict[str, type[WrennError]] = {
 }


-def handle_response(resp: httpx.Response) -> dict | list:
-    if resp.status_code >= 400:
+def _raise_for_status(resp: httpx.Response) -> None:
+    if resp.status_code < 400:
+        return
+
    try:
        body = resp.json()
    except Exception:
-            resp.raise_for_status()
-            raise
+        raise WrennInternalError(
+            code="internal_error",
+            message=resp.text or f"HTTP {resp.status_code}",
+            status_code=resp.status_code,
+        )

    err = body.get("error", {})
    code = err.get("code", "internal_error")
@ -100,7 +134,7 @@ def handle_response(resp: httpx.Response) -> dict | list:
            code=code,
            message=message,
            status_code=resp.status_code,
-                capsule_ids=body.get("sandbox_ids", []),
+            capsule_ids=body.get("capsule_ids") or body.get("sandbox_ids", []),
        )

    raise exc_cls(
@ -109,9 +143,16 @@ def handle_response(resp: httpx.Response) -> dict | list:
        status_code=resp.status_code,
    )

+
+def handle_response(resp: httpx.Response) -> dict | list:
+    _raise_for_status(resp)
+
    if resp.status_code == 204:
        return {}

+    if not resp.content:
+        return {}
+
    return resp.json()


--- a/src/wrenn/files.py
+++ b/src/wrenn/files.py
@ -0,0 +1,404 @@
+from __future__ import annotations
+
+import os
+from collections.abc import AsyncIterator, Iterator
+
+import httpx
+
+from wrenn.exceptions import WrennNotFoundError, _raise_for_status, handle_response
+from wrenn.models import FileEntry, ListDirResponse, MakeDirResponse
+
+
+class Files:
+    """Sync filesystem interface. Accessed via ``capsule.files``."""
+
+    def __init__(self, capsule_id: str, http: httpx.Client) -> None:
+        self._capsule_id = capsule_id
+        self._http = http
+
+    def read(self, path: str) -> str:
+        """Read a file as a UTF-8 string.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Returns:
+            str: File contents decoded as UTF-8.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        return self.read_bytes(path).decode("utf-8", errors="replace")
+
+    def read_bytes(self, path: str) -> bytes:
+        """Read a file as raw bytes.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Returns:
+            bytes: Raw file contents.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/read",
+            json={"path": path},
+        )
+        _raise_for_status(resp)
+        return resp.content
+
+    def write(self, path: str, data: str | bytes) -> None:
+        """Write data to a file inside the capsule.
+
+        Creates parent directories if they do not exist.
+
+        Args:
+            path (str): Absolute destination path inside the capsule.
+            data (str | bytes): Content to write. Strings are UTF-8 encoded.
+        """
+        if isinstance(data, str):
+            data = data.encode("utf-8")
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/write",
+            files={"file": ("upload", data)},
+            data={"path": path},
+        )
+        _raise_for_status(resp)
+
+    def list(self, path: str, depth: int = 1) -> list[FileEntry]:
+        """List directory contents.
+
+        Args:
+            path (str): Absolute path to the directory inside the capsule.
+            depth (int): Recursion depth. ``1`` lists only immediate children.
+                Defaults to ``1``.
+
+        Returns:
+            list[FileEntry]: Entries in the directory.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/list",
+            json={"path": path, "depth": depth},
+        )
+        parsed = ListDirResponse.model_validate(handle_response(resp))
+        return parsed.entries or []
+
+    def exists(self, path: str) -> bool:
+        """Check whether a path exists inside the capsule.
+
+        Args:
+            path (str): Absolute path to check.
+
+        Returns:
+            bool: ``True`` if the path exists.
+        """
+        parent = os.path.dirname(path)
+        name = os.path.basename(path)
+        try:
+            entries = self.list(parent, depth=1)
+        except WrennNotFoundError:
+            return False
+        return any(e.name == name for e in entries)
+
+    def make_dir(self, path: str) -> FileEntry:
+        """Create a directory (with parents). Idempotent.
+
+        Args:
+            path (str): Absolute path of the directory to create.
+
+        Returns:
+            FileEntry: The created (or already-existing) directory entry.
+        """
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/mkdir",
+            json={"path": path},
+        )
+        if resp.status_code == 409:
+            try:
+                body = resp.json()
+                if body.get("error", {}).get("code") == "conflict":
+                    parent = os.path.dirname(path)
+                    name = os.path.basename(path)
+                    for entry in self.list(parent, depth=1):
+                        if entry.name == name:
+                            return entry
+            except Exception:
+                pass
+        parsed = MakeDirResponse.model_validate(handle_response(resp))
+        if parsed.entry is None:
+            raise RuntimeError("mkdir response missing entry")
+        return parsed.entry
+
+    def remove(self, path: str) -> None:
+        """Remove a file or directory recursively.
+
+        Args:
+            path (str): Absolute path to remove.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/remove",
+            json={"path": path},
+        )
+        handle_response(resp)
+
+    def upload_stream(self, path: str, stream: Iterator[bytes]) -> None:
+        """Stream a large file into the capsule.
+
+        Prefer this over :meth:`write` when the file is too large to hold in
+        memory.
+
+        Args:
+            path (str): Absolute destination path inside the capsule.
+            stream (Iterator[bytes]): Iterable of byte chunks to upload.
+        """
+        boundary = os.urandom(16).hex().encode("utf-8")
+
+        def _multipart() -> Iterator[bytes]:
+            yield b"--" + boundary + b"\r\n"
+            yield b'Content-Disposition: form-data; name="path"\r\n\r\n'
+            yield path.encode("utf-8") + b"\r\n"
+            yield b"--" + boundary + b"\r\n"
+            yield b'Content-Disposition: form-data; name="file"; filename="upload.bin"\r\n'
+            yield b"Content-Type: application/octet-stream\r\n\r\n"
+            for chunk in stream:
+                yield chunk if isinstance(chunk, bytes) else chunk.encode("utf-8")
+            yield b"\r\n--" + boundary + b"--\r\n"
+
+        resp = self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/stream/write",
+            content=_multipart(),
+            headers={
+                "Content-Type": f"multipart/form-data; boundary={boundary.decode('utf-8')}"
+            },
+        )
+        _raise_for_status(resp)
+
+    def download_stream(self, path: str) -> Iterator[bytes]:
+        """Stream a large file out of the capsule.
+
+        Prefer this over :meth:`read_bytes` when the file is too large to hold
+        in memory.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Yields:
+            bytes: Successive byte chunks of the file.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        with self._http.stream(
+            "POST",
+            f"/v1/capsules/{self._capsule_id}/files/stream/read",
+            json={"path": path},
+        ) as resp:
+            resp.raise_for_status()
+            yield from resp.iter_bytes()
+
+
+class AsyncFiles:
+    """Async filesystem interface. Accessed via ``capsule.files``."""
+
+    def __init__(self, capsule_id: str, http: httpx.AsyncClient) -> None:
+        self._capsule_id = capsule_id
+        self._http = http
+
+    async def read(self, path: str) -> str:
+        """Read a file as a UTF-8 string.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Returns:
+            str: File contents decoded as UTF-8.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        data = await self.read_bytes(path)
+        return data.decode("utf-8", errors="replace")
+
+    async def read_bytes(self, path: str) -> bytes:
+        """Read a file as raw bytes.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Returns:
+            bytes: Raw file contents.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/read",
+            json={"path": path},
+        )
+        _raise_for_status(resp)
+        return resp.content
+
+    async def write(self, path: str, data: str | bytes) -> None:
+        """Write data to a file inside the capsule.
+
+        Creates parent directories if they do not exist.
+
+        Args:
+            path (str): Absolute destination path inside the capsule.
+            data (str | bytes): Content to write. Strings are UTF-8 encoded.
+        """
+        if isinstance(data, str):
+            data = data.encode("utf-8")
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/write",
+            files={"file": ("upload", data)},
+            data={"path": path},
+        )
+        _raise_for_status(resp)
+
+    async def list(self, path: str, depth: int = 1) -> list[FileEntry]:
+        """List directory contents.
+
+        Args:
+            path (str): Absolute path to the directory inside the capsule.
+            depth (int): Recursion depth. ``1`` lists only immediate children.
+                Defaults to ``1``.
+
+        Returns:
+            list[FileEntry]: Entries in the directory.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/list",
+            json={"path": path, "depth": depth},
+        )
+        parsed = ListDirResponse.model_validate(handle_response(resp))
+        return parsed.entries or []
+
+    async def exists(self, path: str) -> bool:
+        """Check whether a path exists inside the capsule.
+
+        Args:
+            path (str): Absolute path to check.
+
+        Returns:
+            bool: ``True`` if the path exists.
+        """
+        parent = os.path.dirname(path)
+        name = os.path.basename(path)
+        try:
+            entries = await self.list(parent, depth=1)
+        except WrennNotFoundError:
+            return False
+        return any(e.name == name for e in entries)
+
+    async def make_dir(self, path: str) -> FileEntry:
+        """Create a directory (with parents). Idempotent.
+
+        Args:
+            path (str): Absolute path of the directory to create.
+
+        Returns:
+            FileEntry: The created (or already-existing) directory entry.
+        """
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/mkdir",
+            json={"path": path},
+        )
+        if resp.status_code == 409:
+            try:
+                body = resp.json()
+                if body.get("error", {}).get("code") == "conflict":
+                    parent = os.path.dirname(path)
+                    name = os.path.basename(path)
+                    for entry in await self.list(parent, depth=1):
+                        if entry.name == name:
+                            return entry
+            except Exception:
+                pass
+        parsed = MakeDirResponse.model_validate(handle_response(resp))
+        if parsed.entry is None:
+            raise RuntimeError("mkdir response missing entry")
+        return parsed.entry
+
+    async def remove(self, path: str) -> None:
+        """Remove a file or directory recursively.
+
+        Args:
+            path (str): Absolute path to remove.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/remove",
+            json={"path": path},
+        )
+        handle_response(resp)
+
+    async def upload_stream(self, path: str, stream: AsyncIterator[bytes]) -> None:
+        """Stream a large file into the capsule.
+
+        Prefer this over :meth:`write` when the file is too large to hold in
+        memory.
+
+        Args:
+            path (str): Absolute destination path inside the capsule.
+            stream (AsyncIterator[bytes]): Async iterable of byte chunks to
+                upload.
+        """
+        boundary = os.urandom(16).hex().encode("utf-8")
+
+        async def _multipart() -> AsyncIterator[bytes]:
+            yield b"--" + boundary + b"\r\n"
+            yield b'Content-Disposition: form-data; name="path"\r\n\r\n'
+            yield path.encode("utf-8") + b"\r\n"
+            yield b"--" + boundary + b"\r\n"
+            yield b'Content-Disposition: form-data; name="file"; filename="upload.bin"\r\n'
+            yield b"Content-Type: application/octet-stream\r\n\r\n"
+            async for chunk in stream:
+                yield chunk if isinstance(chunk, bytes) else chunk.encode("utf-8")
+            yield b"\r\n--" + boundary + b"--\r\n"
+
+        resp = await self._http.post(
+            f"/v1/capsules/{self._capsule_id}/files/stream/write",
+            content=_multipart(),
+            headers={
+                "Content-Type": f"multipart/form-data; boundary={boundary.decode('utf-8')}"
+            },
+        )
+        _raise_for_status(resp)
+
+    async def download_stream(self, path: str) -> AsyncIterator[bytes]:
+        """Stream a large file out of the capsule.
+
+        Prefer this over :meth:`read_bytes` when the file is too large to hold
+        in memory.
+
+        Args:
+            path (str): Absolute path to the file inside the capsule.
+
+        Yields:
+            bytes: Successive byte chunks of the file.
+
+        Raises:
+            WrennNotFoundError: If the path does not exist.
+        """
+        async with self._http.stream(
+            "POST",
+            f"/v1/capsules/{self._capsule_id}/files/stream/read",
+            json={"path": path},
+        ) as resp:
+            resp.raise_for_status()
+            async for chunk in resp.aiter_bytes():
+                yield chunk
--- a/src/wrenn/models/init.py
+++ b/src/wrenn/models/init.py
@ -1,15 +1,9 @@
 from wrenn.models._generated import (
    APIKeyResponse,
    AuthResponse,
-    BackgroundExecResponse,
    Capsule,
-    CapsuleMetrics,
-    CapsuleStats,
-    ChangePasswordRequest,
-    ChannelResponse,
    CreateAPIKeyRequest,
    CreateCapsuleRequest,
-    CreateChannelRequest,
    CreateHostRequest,
    CreateHostResponse,
    CreateSnapshotRequest,
@ -20,55 +14,31 @@ from wrenn.models._generated import (
    ExecResponse,
    FileEntry,
    Host,
-    HostDeletePreview,
    ListDirRequest,
    ListDirResponse,
    LoginRequest,
    MakeDirRequest,
    MakeDirResponse,
-    MeResponse,
-    MetricPoint,
-    ProcessEntry,
-    ProcessListResponse,
    ReadFileRequest,
-    RefreshHostTokenRequest,
-    RefreshHostTokenResponse,
    RegisterHostRequest,
    RegisterHostResponse,
    RemoveRequest,
-    RotateConfigRequest,
    SignupRequest,
-    SignupResponse,
    Status,
    Status1,
    Template,
-    Team,
-    TeamDetail,
-    TeamMember,
-    TeamWithRole,
-    TestChannelRequest,
    Type,
    Type1,
    Type2,
-    UpdateChannelRequest,
-    UsageResponse,
-    UserSearchResult,
 )

 __all__ = [
    "APIKeyResponse",
    "AuthResponse",
-    "BackgroundExecResponse",
-    "Capsule",
-    "CapsuleMetrics",
-    "CapsuleStats",
-    "ChangePasswordRequest",
-    "ChannelResponse",
    "CreateAPIKeyRequest",
-    "CreateCapsuleRequest",
-    "CreateChannelRequest",
    "CreateHostRequest",
    "CreateHostResponse",
+    "CreateCapsuleRequest",
    "CreateSnapshotRequest",
    "Encoding",
    "Error",
@ -77,37 +47,21 @@ __all__ = [
    "ExecResponse",
    "FileEntry",
    "Host",
-    "HostDeletePreview",
    "ListDirRequest",
    "ListDirResponse",
    "LoginRequest",
    "MakeDirRequest",
    "MakeDirResponse",
-    "MeResponse",
-    "MetricPoint",
-    "ProcessEntry",
-    "ProcessListResponse",
    "ReadFileRequest",
-    "RefreshHostTokenRequest",
-    "RefreshHostTokenResponse",
    "RegisterHostRequest",
    "RegisterHostResponse",
    "RemoveRequest",
-    "RotateConfigRequest",
+    "Capsule",
    "SignupRequest",
-    "SignupResponse",
    "Status",
    "Status1",
    "Template",
-    "Team",
-    "TeamDetail",
-    "TeamMember",
-    "TeamWithRole",
-    "TestChannelRequest",
    "Type",
    "Type1",
    "Type2",
-    "UpdateChannelRequest",
-    "UsageResponse",
-    "UserSearchResult",
 ]
--- a/src/wrenn/models/_generated.py
+++ b/src/wrenn/models/_generated.py
@ -1,14 +1,12 @@
 # generated by datamodel-codegen:
 #   filename:  openapi.yaml
-#   timestamp: 2026-04-19T19:56:15+00:00
+#   timestamp: 2026-05-15T07:57:28+00:00

 from __future__ import annotations
-
+from pydantic import AwareDatetime, BaseModel, EmailStr, Field
+from typing import Annotated
 from datetime import date as date_aliased
 from enum import StrEnum
-from typing import Annotated
-
-from pydantic import AwareDatetime, BaseModel, EmailStr, Field


 class SignupRequest(BaseModel):
@ -135,7 +133,10 @@ class Status(StrEnum):
    pending = "pending"
    starting = "starting"
    running = "running"
+    pausing = "pausing"
    paused = "paused"
+    resuming = "resuming"
+    stopping = "stopping"
    hibernated = "hibernated"
    stopped = "stopped"
    missing = "missing"
--- a/src/wrenn/pty.py
+++ b/src/wrenn/pty.py
@ -153,7 +153,8 @@ class PtySession:
            if event.pid is not None:
                self._pid = event.pid
        if event.type == PtyEventType.exit:
-            raise StopIteration
+            self._done = True
+            return event
        if event.type == PtyEventType.error and event.fatal:
            self._done = True
            return event
@ -281,7 +282,8 @@ class AsyncPtySession:
            if event.pid is not None:
                self._pid = event.pid
        if event.type == PtyEventType.exit:
-            raise StopAsyncIteration
+            self._done = True
+            return event
        if event.type == PtyEventType.error and event.fatal:
            self._done = True
            return event
--- a/src/wrenn/sandbox.py
+++ b/src/wrenn/sandbox.py
@ -1,25 +1,21 @@
 import warnings as _warnings

-from wrenn.capsule import (  # noqa: F401
-    CodeResult,
-    ExecResult,
+from wrenn.capsule import Capsule  # noqa: F401
+from wrenn.commands import (  # noqa: F401
    StreamErrorEvent,
    StreamEvent,
    StreamExitEvent,
    StreamStartEvent,
    StreamStderrEvent,
    StreamStdoutEvent,
-    _build_proxy_url,
-    _parse_stream_event,
 )
-from wrenn.capsule import Capsule


 def __getattr__(name: str) -> type:
    if name == "Sandbox":
        _warnings.warn(
            "'Sandbox' is deprecated, use 'Capsule' instead",
-            DeprecationWarning,
+            FutureWarning,
            stacklevel=2,
        )
        return Capsule
--- a/tests/conftest.py
+++ b/tests/conftest.py
@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+import pytest
+
+ENV_FILE = Path(__file__).resolve().parent.parent / ".env"
+
+
+def _read_env_file() -> dict[str, str]:
+    result: dict[str, str] = {}
+    if not ENV_FILE.exists():
+        return result
+    for line in ENV_FILE.read_text().splitlines():
+        line = line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        key, _, value = line.partition("=")
+        key = key.strip()
+        value = value.strip().strip("\"'")
+        if key:
+            result[key] = value
+    return result
+
+
+def pytest_collection_modifyitems(
+    config: pytest.Config, items: list[pytest.Item]
+) -> None:
+    env_vars = _read_env_file()
+    has_key = bool(os.environ.get("WRENN_API_KEY") or env_vars.get("WRENN_API_KEY"))
+    if has_key:
+        return
+    skip = pytest.mark.skip(reason="WRENN_API_KEY not set")
+    for item in items:
+        if "integration" in item.keywords:
+            item.add_marker(skip)
--- a/tests/integration/init.py
+++ b/tests/integration/init.py
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@ -1,95 +0,0 @@
-from __future__ import annotations
-
-import os
-from typing import Generator
-
-import pytest
-import pytest_asyncio
-from typing_extensions import AsyncGenerator
-
-from wrenn.capsule import Capsule
-from wrenn.client import AsyncWrennClient, WrennClient
-
-WRENN_API_KEY = os.environ.get("WRENN_API_KEY")
-WRENN_TOKEN = os.environ.get("WRENN_TOKEN")
-WRENN_BASE_URL = os.environ.get("WRENN_BASE_URL", "http://localhost:8080")
-WRENN_TEST_EMAIL = os.environ.get("WRENN_TEST_EMAIL")
-WRENN_TEST_PASSWORD = os.environ.get("WRENN_TEST_PASSWORD")
-
-
-def _has_auth() -> bool:
-    return bool(WRENN_API_KEY or WRENN_TOKEN)
-
-
-requires_auth = pytest.mark.skipif(
-    not _has_auth(),
-    reason="Set WRENN_API_KEY or WRENN_TOKEN to run integration tests",
-)
-
-
-@pytest.fixture
-def client() -> Generator[WrennClient, None, None]:
-    with WrennClient(
-        api_key=WRENN_API_KEY,
-        token=WRENN_TOKEN,
-        base_url=WRENN_BASE_URL,
-    ) as c:
-        yield c
-
-
-@pytest_asyncio.fixture
-async def async_client() -> AsyncGenerator[AsyncWrennClient, None]:
-    async with AsyncWrennClient(
-        api_key=WRENN_API_KEY, token=WRENN_TOKEN, base_url=WRENN_BASE_URL
-    ) as c:
-        yield c
-
-
-@pytest.fixture
-def bearer_client() -> Generator[WrennClient, None, None]:
-    if WRENN_TOKEN:
-        with WrennClient(token=WRENN_TOKEN, base_url=WRENN_BASE_URL) as c:
-            yield c
-    elif WRENN_TEST_EMAIL and WRENN_TEST_PASSWORD:
-        with WrennClient(api_key=WRENN_API_KEY, base_url=WRENN_BASE_URL) as c:
-            resp = c.auth.login(WRENN_TEST_EMAIL, WRENN_TEST_PASSWORD)
-        with WrennClient(token=resp.token, base_url=WRENN_BASE_URL) as c:
-            yield c
-    else:
-        pytest.skip(
-            "Set WRENN_TOKEN or WRENN_TEST_EMAIL+WRENN_TEST_PASSWORD for bearer-auth tests"
-        )
-
-
-@pytest_asyncio.fixture
-async def async_minimal_capsule(
-    async_client: AsyncWrennClient,
-) -> AsyncGenerator[Capsule, None]:
-    """Provides a ready-to-use minimal capsule and cleans it up afterward."""
-    cap = await async_client.capsules.create(template="minimal", timeout_sec=120)
-    await cap.async_wait_ready(timeout=60, interval=1)
-    yield cap
-    await cap.async_destroy()
-
-
-@pytest_asyncio.fixture
-async def async_python_capsule(
-    async_client: AsyncWrennClient,
-) -> AsyncGenerator[Capsule, None]:
-    """Provides a ready-to-use Python interpreter capsule."""
-    cap = await async_client.capsules.create(
-        template="python-interpreter-v0-beta", timeout_sec=120
-    )
-    await cap.async_wait_ready(timeout=60, interval=1)
-    yield cap
-    await cap.async_destroy()
-
-
-@pytest.fixture
-def minimal_capsule(
-    client: WrennClient,
-) -> Generator[Capsule, None, None]:
-    """Provides a ready-to-use minimal capsule and cleans it up afterward."""
-    with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-        cap.wait_ready(timeout=60, interval=1)
-        yield cap
--- a/tests/integration/test_async.py
+++ b/tests/integration/test_async.py
@ -1,79 +0,0 @@
-from __future__ import annotations
-
-import pytest
-
-from wrenn.capsule import Capsule, ExecResult
-
-from .conftest import requires_auth
-
-# --- Tests ---
-
-
-@requires_auth
-class TestAsyncCapsuleLifecycle:
-    @pytest.mark.asyncio
-    async def test_async_create_exec_destroy(self, async_minimal_capsule: Capsule):
-        result = await async_minimal_capsule.async_exec("echo", args=["async_hello"])
-        assert isinstance(result, ExecResult)
-        assert result.exit_code == 0
-        assert "async_hello" in result.stdout
-
-    @pytest.mark.asyncio
-    async def test_async_upload_download(self, async_minimal_capsule: Capsule):
-        content = b"Async upload test"
-        await async_minimal_capsule.async_upload("/tmp/async_test.txt", content)
-        downloaded = await async_minimal_capsule.async_download("/tmp/async_test.txt")
-        assert downloaded == content
-
-    @pytest.mark.asyncio
-    async def test_async_run_code(self, async_python_capsule: Capsule):
-        r = await async_python_capsule.async_run_code("42 * 2")
-        assert r.text == "84"
-
-
-@requires_auth
-class TestAsyncFilesystem:
-    @pytest.mark.asyncio
-    async def test_async_list_dir(self, async_minimal_capsule: Capsule):
-        await async_minimal_capsule.async_mkdir("/tmp/async_ls_test")
-        await async_minimal_capsule.async_upload("/tmp/async_ls_test/file.txt", b"data")
-        entries = await async_minimal_capsule.async_list_dir("/tmp/async_ls_test")
-
-        assert isinstance(entries, list)
-        assert any(e.name == "file.txt" for e in entries)
-
-    @pytest.mark.asyncio
-    async def test_async_mkdir(self, async_minimal_capsule: Capsule):
-        entry = await async_minimal_capsule.async_mkdir("/tmp/async_mkdir_test")
-        assert entry.type == "directory"
-        assert entry.name == "async_mkdir_test"
-
-    @pytest.mark.asyncio
-    async def test_async_remove(self, async_minimal_capsule: Capsule):
-        await async_minimal_capsule.async_upload("/tmp/async_rm.txt", b"bye")
-
-        entries = await async_minimal_capsule.async_list_dir("/tmp")
-        assert any(e.name == "async_rm.txt" for e in entries)
-
-        await async_minimal_capsule.async_remove("/tmp/async_rm.txt")
-        entries = await async_minimal_capsule.async_list_dir("/tmp")
-        assert not any(e.name == "async_rm.txt" for e in entries)
-
-    @pytest.mark.asyncio
-    async def test_async_full_filesystem_roundtrip(
-        self, async_minimal_capsule: Capsule
-    ):
-        await async_minimal_capsule.async_mkdir("/tmp/async_rt")
-        await async_minimal_capsule.async_upload(
-            "/tmp/async_rt/file.txt", b"async content"
-        )
-
-        entries = await async_minimal_capsule.async_list_dir("/tmp/async_rt")
-        assert any(e.name == "file.txt" for e in entries)
-
-        data = await async_minimal_capsule.async_download("/tmp/async_rt/file.txt")
-        assert data == b"async content"
-
-        await async_minimal_capsule.async_remove("/tmp/async_rt/file.txt")
-        entries = await async_minimal_capsule.async_list_dir("/tmp/async_rt")
-        assert not any(e.name == "file.txt" for e in entries)
--- a/tests/integration/test_auth_apikeys.py
+++ b/tests/integration/test_auth_apikeys.py
@ -1,28 +0,0 @@
-from __future__ import annotations
-
-from wrenn.client import WrennClient
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestSnapshots:
-    def test_list_templates(self, client: WrennClient):
-        templates = client.snapshots.list()
-        assert isinstance(templates, list)
-
-
-@requires_auth
-class TestAPIKeys:
-    def test_create_list_delete(self, bearer_client: WrennClient):
-        key_resp = bearer_client.api_keys.create(name="integration-test-key")
-        assert key_resp.name == "integration-test-key"
-        assert key_resp.key is not None
-        assert key_resp.id is not None
-
-        try:
-            keys = bearer_client.api_keys.list()
-            ids = [k.id for k in keys]
-            assert key_resp.id in ids
-        finally:
-            bearer_client.api_keys.delete(key_resp.id)
--- a/tests/integration/test_capsule_lifecycle.py
+++ b/tests/integration/test_capsule_lifecycle.py
@ -1,91 +0,0 @@
-from __future__ import annotations
-
-import pytest
-
-from wrenn.capsule import Capsule
-from wrenn.client import WrennClient
-from wrenn.exceptions import WrennNotFoundError, WrennValidationError
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestCapsuleLifecycle:
-    def test_create_exec_destroy(self, minimal_capsule: Capsule):
-        result = minimal_capsule.exec("echo", args=["hello"])
-        assert result.exit_code == 0
-        assert "hello" in result.stdout
-
-    def test_exec_with_args(self, minimal_capsule: Capsule):
-        result = minimal_capsule.exec("echo", args=["hello", "world"])
-        assert result.exit_code == 0
-        assert "hello world" in result.stdout
-
-    def test_exec_nonzero_exit(self, minimal_capsule: Capsule):
-        result = minimal_capsule.exec("sh", args=["-c", "exit 42"])
-        assert result.exit_code == 42
-
-    def test_exec_stderr(self, minimal_capsule: Capsule):
-        result = minimal_capsule.exec("sh", args=["-c", "echo err>&2"])
-        assert result.exit_code == 0
-        assert "err" in result.stderr
-
-    def test_context_manager_cleanup(self, client: WrennClient):
-        # This test explicitly requires manual management to verify the context manager
-        cap = client.capsules.create(template="minimal", timeout_sec=120)
-        cap_id = cap.id
-
-        with cap:
-            cap.wait_ready(timeout=60, interval=1)
-
-        fetched = client.capsules.get(cap_id)
-        assert fetched.status in ("stopped", "destroyed")
-
-
-@requires_auth
-class TestPauseResume:
-    def test_pause_and_resume(self, minimal_capsule: Capsule):
-        minimal_capsule.pause()
-        assert minimal_capsule.status == "paused"
-
-        minimal_capsule.resume()
-        minimal_capsule.wait_ready(timeout=60, interval=1)
-
-        result = minimal_capsule.exec("echo", args=["resumed"])
-        assert result.exit_code == 0
-        assert "resumed" in result.stdout
-
-
-@requires_auth
-class TestPing:
-    def test_ping_resets_timer(self, minimal_capsule: Capsule):
-        minimal_capsule.ping()
-        result = minimal_capsule.exec("echo", args=["still_alive"])
-        assert result.exit_code == 0
-        assert "still_alive" in result.stdout
-
-
-@requires_auth
-class TestProxy:
-    def test_get_url(self, minimal_capsule: Capsule):
-        url = minimal_capsule.get_url(8888)
-        assert minimal_capsule.id in url
-        assert "8888" in url
-
-
-@requires_auth
-class TestListAndGet:
-    def test_list_capsules(self, client: WrennClient, minimal_capsule: Capsule):
-        # Require minimal_capsule to ensure one exists, use client to list
-        boxes = client.capsules.list()
-        ids = [b.id for b in boxes]
-        assert minimal_capsule.id in ids
-
-    def test_get_existing_capsule(self, client: WrennClient, minimal_capsule: Capsule):
-        fetched = client.capsules.get(minimal_capsule.id)
-        assert fetched.id == minimal_capsule.id
-        assert fetched.status == "running"
-
-    def test_get_nonexistent_capsule(self, client: WrennClient):
-        with pytest.raises((WrennNotFoundError, WrennValidationError)):
-            client.capsules.get("cl-nonexistent00000000000000000")
--- a/tests/integration/test_filesystem.py
+++ b/tests/integration/test_filesystem.py
@ -1,133 +0,0 @@
-from __future__ import annotations
-
-import pytest
-
-from wrenn.client import WrennClient
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestFileIO:
-    def test_upload_and_download(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            content = b"Hello from integration test!"
-            cap.upload("/tmp/test_file.txt", content)
-            downloaded = cap.download("/tmp/test_file.txt")
-            assert downloaded == content
-
-    def test_download_nonexistent_file(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with pytest.raises(Exception):
-                cap.download("/tmp/no_such_file_12345")
-
-
-@requires_auth
-class TestFilesystemListDir:
-    def test_list_dir_root(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/ls_test_root")
-            cap.upload("/tmp/ls_test_root/hello.txt", b"hello")
-            entries = cap.list_dir("/tmp/ls_test_root")
-            assert isinstance(entries, list)
-            names = [e.name for e in entries]
-            assert "hello.txt" in names
-
-    def test_list_dir_after_mkdir(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/fs_test_dir")
-            entries = cap.list_dir("/tmp")
-            names = [e.name for e in entries]
-            assert "fs_test_dir" in names
-
-    def test_list_dir_file_metadata(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.upload("/tmp/meta_test.txt", b"hello world")
-            entries = cap.list_dir("/tmp")
-            match = [e for e in entries if e.name == "meta_test.txt"]
-            assert len(match) == 1
-            f = match[0]
-            assert f.type == "file"
-            assert f.size == 11
-            assert f.permissions is not None
-            assert f.owner is not None
-            assert f.group is not None
-            assert f.modified_at is not None
-
-    def test_list_dir_depth(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/depth_a/depth_b")
-            cap.upload("/tmp/depth_a/depth_b/nested.txt", b"deep")
-            entries = cap.list_dir("/tmp/depth_a", depth=2)
-            paths = [e.path for e in entries]
-            assert any("nested.txt" in p for p in paths)
-
-    def test_list_dir_empty_directory(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/empty_dir_test")
-            entries = cap.list_dir("/tmp/empty_dir_test")
-            assert entries == []
-
-
-@requires_auth
-class TestFilesystemMkdir:
-    def test_mkdir_creates_directory(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            entry = cap.mkdir("/tmp/mkdir_test")
-            assert entry.name == "mkdir_test"
-            assert entry.type == "directory"
-            assert entry.path == "/tmp/mkdir_test"
-
-    def test_mkdir_creates_parents(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            entry = cap.mkdir("/tmp/a/b/c/d")
-            assert entry.type == "directory"
-
-    def test_mkdir_already_exists(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/exist_test")
-            entry = cap.mkdir("/tmp/exist_test")
-            assert entry.type == "directory"
-
-
-@requires_auth
-class TestFilesystemRemove:
-    def test_remove_file(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.upload("/tmp/rm_test.txt", b"delete me")
-            entries_before = cap.list_dir("/tmp")
-            assert any(e.name == "rm_test.txt" for e in entries_before)
-            cap.remove("/tmp/rm_test.txt")
-            entries_after = cap.list_dir("/tmp")
-            assert not any(e.name == "rm_test.txt" for e in entries_after)
-
-    def test_remove_directory(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            cap.mkdir("/tmp/rm_dir_test")
-            cap.upload("/tmp/rm_dir_test/file.txt", b"inside")
-            cap.remove("/tmp/rm_dir_test")
-            entries = cap.list_dir("/tmp")
-            assert not any(e.name == "rm_dir_test" for e in entries)
-
-    def test_upload_download_remove_roundtrip(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            content = b"round trip test data " * 100
-            cap.upload("/tmp/rt.txt", content)
-            downloaded = cap.download("/tmp/rt.txt")
-            assert downloaded == content
-            cap.remove("/tmp/rt.txt")
-            with pytest.raises(Exception):
-                cap.download("/tmp/rt.txt")
--- a/tests/integration/test_pty.py
+++ b/tests/integration/test_pty.py
@ -1,77 +0,0 @@
-from __future__ import annotations
-
-from wrenn.client import WrennClient
-from wrenn.pty import PtyEventType
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestPty:
-    def test_pty_basic_output(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with cap.pty(cmd="/bin/sh", cwd="/tmp") as term:
-                term.write(b"echo pty_hello\n")
-                output = b""
-                for event in term:
-                    if event.type == PtyEventType.output:
-                        output += event.data
-                    elif event.type == PtyEventType.exit:
-                        break
-                    if b"pty_hello" in output:
-                        term.write(b"exit\n")
-                assert b"pty_hello" in output
-
-    def test_pty_tag_and_pid(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with cap.pty(cmd="/bin/sh") as term:
-                started = False
-                for event in term:
-                    if event.type == PtyEventType.started:
-                        started = True
-                        assert term.tag is not None
-                        assert term.pid is not None
-                        assert term.tag.startswith("pty-")
-                    elif event.type == PtyEventType.output:
-                        term.write(b"exit\n")
-                    elif event.type == PtyEventType.exit:
-                        break
-                assert started
-
-    def test_pty_exit_on_command_exit(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with cap.pty(cmd="/bin/echo", args=["immediate"]) as term:
-                events = list(term)
-                types = [e.type for e in events]
-                assert PtyEventType.started in types
-                assert PtyEventType.output in types or PtyEventType.exit in types
-
-    def test_pty_resize(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with cap.pty(cmd="/bin/sh", cols=80, rows=24) as term:
-                for event in term:
-                    if event.type == PtyEventType.started:
-                        term.resize(120, 40)
-                        term.write(b"exit\n")
-                    elif event.type == PtyEventType.exit:
-                        break
-
-    def test_pty_envs(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            with cap.pty(cmd="/bin/sh", envs={"MY_VAR": "hello_env"}) as term:
-                output = b""
-                for event in term:
-                    if event.type == PtyEventType.started:
-                        term.write(b"echo $MY_VAR\n")
-                    elif event.type == PtyEventType.output:
-                        output += event.data
-                        if b"hello_env" in output:
-                            term.write(b"exit\n")
-                    elif event.type == PtyEventType.exit:
-                        break
-                assert b"hello_env" in output
--- a/tests/integration/test_run_code.py
+++ b/tests/integration/test_run_code.py
@ -1,49 +0,0 @@
-from __future__ import annotations
-
-from wrenn.client import WrennClient
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestRunCode:
-    def test_basic_execution(self, client: WrennClient):
-        with client.capsules.create(
-            template="python-interpreter-v0-beta", timeout_sec=120
-        ) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-
-            r = cap.run_code("x = 42")
-            assert r.error is None
-
-            r = cap.run_code("x * 2")
-            assert r.text == "84"
-
-    def test_state_persists(self, client: WrennClient):
-        with client.capsules.create(
-            template="python-interpreter-v0-beta", timeout_sec=120
-        ) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-
-            cap.run_code("def greet(name): return f'hello {name}'")
-            r = cap.run_code("greet('capsule')")
-            assert "hello capsule" in (r.text or "")
-
-    def test_error_traceback(self, client: WrennClient):
-        with client.capsules.create(
-            template="python-interpreter-v0-beta", timeout_sec=120
-        ) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-
-            r = cap.run_code("1/0")
-            assert r.error is not None
-            assert "ZeroDivisionError" in r.error
-
-    def test_stdout_capture(self, client: WrennClient):
-        with client.capsules.create(
-            template="python-interpreter-v0-beta", timeout_sec=120
-        ) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-
-            r = cap.run_code("print('hello from kernel')")
-            assert "hello from kernel" in r.stdout
--- a/tests/integration/test_streaming.py
+++ b/tests/integration/test_streaming.py
@ -1,30 +0,0 @@
-from __future__ import annotations
-
-from wrenn.client import WrennClient
-
-from .conftest import requires_auth
-
-
-@requires_auth
-class TestStreamUploadDownload:
-    def test_stream_upload_and_download(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            chunks = [b"chunk0_", b"chunk1_", b"chunk2"]
-
-            def data_gen():
-                yield from chunks
-
-            cap.stream_upload("/tmp/stream_test.bin", data_gen())
-            downloaded = cap.download("/tmp/stream_test.bin")
-            assert downloaded == b"chunk0_chunk1_chunk2"
-
-    def test_stream_download_large(self, client: WrennClient):
-        with client.capsules.create(template="minimal", timeout_sec=120) as cap:
-            cap.wait_ready(timeout=60, interval=1)
-            content = b"x" * 65536 * 3
-            cap.upload("/tmp/large.bin", content)
-            collected = b""
-            for chunk in cap.stream_download("/tmp/large.bin"):
-                collected += chunk
-            assert collected == content
--- a/tests/test_capsule_features.py
+++ b/tests/test_capsule_features.py
@ -1,24 +1,18 @@
 from __future__ import annotations

-import pytest
+import httpx
 import respx

-from wrenn.capsule import Capsule, CodeResult, _build_proxy_url
-from wrenn.client import WrennClient
+from wrenn.capsule import Capsule, _build_proxy_url
+from wrenn.code_interpreter.models import Execution, ExecutionError, Logs, Result

-
-@pytest.fixture
-def client():
-    with WrennClient(
-        api_key="wrn_test1234567890abcdef12345678", token="jwt-test-token-abc123"
-    ) as c:
-        yield c
+BASE = "https://app.wrenn.dev/api"


 class TestBuildProxyUrl:
    def test_https_production(self):
-        url = _build_proxy_url("https://api.wrenn.dev", "cl-abc123", 8888)
-        assert url == "wss://8888-cl-abc123.api.wrenn.dev"
+        url = _build_proxy_url("https://app.wrenn.dev/api", "cl-abc123", 8888)
+        assert url == "wss://8888-cl-abc123.app.wrenn.dev"

    def test_http_localhost(self):
        url = _build_proxy_url("http://localhost:8080", "cl-abc123", 3000)
@ -33,176 +27,186 @@ class TestBuildProxyUrl:
        assert url == "ws://5000-sb-2.192.168.1.1"


-class TestCapsuleGetUrl:
+class TestCapsuleCreate:
    @respx.mock
-    def test_get_url_returns_proxy_url(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "cl-abc", "status": "pending"}
+    def test_capsule_constructor_creates(self):
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202, json={"id": "cl-1", "status": "starting", "template": "minimal"}
        )
-        cap = client.capsules.create(template="minimal")
-        url = cap.get_url(8888)
-        assert url == "wss://8888-cl-abc.api.wrenn.dev"
-
-    @respx.mock
-    def test_get_url_localhost(self):
-        with WrennClient(
+        cap = Capsule(
+            template="minimal",
            api_key="wrn_test1234567890abcdef12345678",
-            base_url="http://localhost:8080",
-        ) as c:
-            respx.post("http://localhost:8080/v1/capsules").respond(
-                201, json={"id": "cl-xyz", "status": "pending"}
+            base_url=BASE,
        )
-            cap = c.capsules.create()
-            url = cap.get_url(3000)
-            assert url == "ws://3000-cl-xyz.localhost:8080"
-
-
-class TestCapsuleHttpClient:
-    @respx.mock
-    def test_http_client_has_api_key_header(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "cl-abc", "status": "pending"}
-        )
-        cap = client.capsules.create()
-        hc = cap.http_client
-        assert hc.headers["X-API-Key"] == "wrn_test1234567890abcdef12345678"
+        assert cap.capsule_id == "cl-1"
+        assert hasattr(cap, "commands")
+        assert hasattr(cap, "files")

    @respx.mock
-    def test_http_client_sends_to_proxy(self, client):
-        route = respx.get("https://8888-cl-abc.api.wrenn.dev/api/kernels").respond(
-            200, json=[]
+    def test_capsule_create_classmethod(self):
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202, json={"id": "cl-2", "status": "starting"}
        )
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "cl-abc", "status": "pending"}
+        cap = Capsule.create(api_key="wrn_test1234567890abcdef12345678", base_url=BASE)
+        assert cap.capsule_id == "cl-2"
+
+    @respx.mock
+    def test_capsule_context_manager_kills(self):
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202, json={"id": "cl-1", "status": "starting"}
+        )
+        kill_route = respx.delete(f"{BASE}/v1/capsules/cl-1").respond(202)
+        with Capsule(api_key="wrn_test1234567890abcdef12345678", base_url=BASE) as cap:
+            assert cap.capsule_id == "cl-1"
+        assert kill_route.called
+
+    @respx.mock
+    def test_capsule_env_var(self, monkeypatch):
+        monkeypatch.setenv("WRENN_API_KEY", "wrn_from_env_key")
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202, json={"id": "cl-3", "status": "starting"}
+        )
+        cap = Capsule(base_url=BASE)
+        assert cap.capsule_id == "cl-3"
+
+
+class TestCapsuleStaticMethods:
+    @respx.mock
+    def test_static_destroy(self):
+        route = respx.delete(f"{BASE}/v1/capsules/cl-1").respond(202)
+        Capsule._static_destroy(
+            "cl-1", api_key="wrn_test1234567890abcdef12345678", base_url=BASE
        )
-        cap = client.capsules.create()
-        resp = cap.http_client.get("/api/kernels")
-        assert resp.status_code == 200
        assert route.called

-    def test_jwt_only_get_url_works(self):
-        with WrennClient(token="jwt-abc") as c:
-            cap = Capsule(id="cl-abc")
-            assert c._mgmt_http is not None
-            cap._bind(
-                c._mgmt_http, str(c._mgmt_http.base_url), api_key=None, token="jwt-abc"
-            )
-            url = cap.get_url(8888)
-            assert "8888-cl-abc" in url
-
-    def test_jwt_only_http_client_has_bearer_header(self):
-        with WrennClient(token="jwt-abc") as c:
-            cap = Capsule(id="cl-abc")
-            assert c._mgmt_http is not None
-            cap._bind(
-                c._mgmt_http, str(c._mgmt_http.base_url), api_key=None, token="jwt-abc"
-            )
-            hc = cap.http_client
-            assert hc.headers["Authorization"] == "Bearer jwt-abc"
-
-
-class TestCreateReturnsBoundCapsule:
    @respx.mock
-    def test_create_returns_capsule_subclass(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "cl-1", "status": "pending", "template": "minimal"}
+    def test_static_pause(self):
+        respx.post(f"{BASE}/v1/capsules/cl-1/pause").respond(
+            202, json={"id": "cl-1", "status": "pausing"}
        )
-        cap = client.capsules.create(template="minimal")
-        assert isinstance(cap, Capsule)
-        assert cap.id == "cl-1"
-        assert hasattr(cap, "exec")
-        assert hasattr(cap, "run_code")
-        assert hasattr(cap, "get_url")
+        info = Capsule._static_pause(
+            "cl-1", api_key="wrn_test1234567890abcdef12345678", base_url=BASE
+        )
+        assert info.status.value == "pausing"

    @respx.mock
-    def test_create_context_manager(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/capsules/cl-1").respond(204)
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "cl-1", "status": "pending"}
+    def test_static_list(self):
+        respx.get(f"{BASE}/v1/capsules").respond(
+            200, json=[{"id": "cl-1", "status": "running"}]
        )
-        cap = client.capsules.create()
-        with cap:
-            assert cap.id == "cl-1"
-        assert route.called
+        items = Capsule.list(api_key="wrn_test1234567890abcdef12345678", base_url=BASE)
+        assert len(items) == 1
+        assert items[0].id == "cl-1"

-
-class TestCodeResult:
-    def test_defaults(self):
-        r = CodeResult()
-        assert r.text is None
-        assert r.data is None
-        assert r.stdout == ""
-        assert r.stderr == ""
-        assert r.error is None
-
-    def test_with_values(self):
-        r = CodeResult(
-            text="84",
-            data={"text/plain": "84"},
-            stdout="",
-            stderr="",
-            error=None,
+    @respx.mock
+    def test_static_get_info(self):
+        respx.get(f"{BASE}/v1/capsules/cl-1").respond(
+            200, json={"id": "cl-1", "status": "running"}
        )
+        info = Capsule._static_get_info(
+            "cl-1", api_key="wrn_test1234567890abcdef12345678", base_url=BASE
+        )
+        assert info.id == "cl-1"
+
+
+class TestCapsuleConnect:
+    @respx.mock
+    def test_connect_running(self):
+        respx.get(f"{BASE}/v1/capsules/cl-1").respond(
+            200, json={"id": "cl-1", "status": "running"}
+        )
+        cap = Capsule.connect(
+            "cl-1", api_key="wrn_test1234567890abcdef12345678", base_url=BASE
+        )
+        assert cap.capsule_id == "cl-1"
+
+    @respx.mock
+    def test_connect_paused_resumes(self):
+        get_route = respx.get(f"{BASE}/v1/capsules/cl-1")
+        get_route.side_effect = [
+            httpx.Response(200, json={"id": "cl-1", "status": "paused"}),
+            httpx.Response(200, json={"id": "cl-1", "status": "running"}),
+        ]
+        respx.post(f"{BASE}/v1/capsules/cl-1/resume").respond(
+            202, json={"id": "cl-1", "status": "resuming"}
+        )
+        cap = Capsule.connect(
+            "cl-1", api_key="wrn_test1234567890abcdef12345678", base_url=BASE
+        )
+        assert cap.capsule_id == "cl-1"
+
+
+class TestExecutionModels:
+    def test_execution_defaults(self):
+        e = Execution()
+        assert e.results == []
+        assert e.logs.stdout == []
+        assert e.logs.stderr == []
+        assert e.error is None
+        assert e.text is None
+
+    def test_result_from_bundle(self):
+        bundle = {"text/plain": "84", "image/png": "base64data"}
+        r = Result.from_bundle(bundle, is_main_result=True)
        assert r.text == "84"
-        assert r.data is not None
-        assert r.data["text/plain"] == "84"
+        assert r.png == "base64data"
+        assert r.is_main_result is True

-    def test_error_result(self):
-        r = CodeResult(error="ZeroDivisionError: division by zero\n...")
-        assert r.error is not None
-        assert "ZeroDivisionError" in r.error
+    def test_result_from_bundle_strips_quotes(self):
+        bundle = {"text/plain": "'hello'"}
+        r = Result.from_bundle(bundle)
+        assert r.text == "hello"

+    def test_result_from_bundle_extra_mimes(self):
+        bundle = {"text/plain": "x", "application/vnd.custom": "data"}
+        r = Result.from_bundle(bundle)
+        assert r.extra == {"application/vnd.custom": "data"}

-class TestJupyterMessageFormat:
-    def test_execute_request_structure(self):
-        cap = Capsule(id="test")
-        msg = cap._jupyter_execute_request("x = 42")
-        assert msg["msg_type"] == "execute_request"
-        assert msg["content"]["code"] == "x = 42"
-        assert msg["content"]["silent"] is False
-        assert "msg_id" in msg
-        assert "header" in msg
-        assert msg["header"]["msg_type"] == "execute_request"
+    def test_result_formats(self):
+        r = Result(text="hi", png="data")
+        assert "text" in r.formats()
+        assert "png" in r.formats()
+        assert "html" not in r.formats()

-    def test_execute_request_unique_ids(self):
-        cap = Capsule(id="test")
-        m1 = cap._jupyter_execute_request("a")
-        m2 = cap._jupyter_execute_request("b")
-        assert m1["msg_id"] != m2["msg_id"]
+    def test_execution_text_property(self):
+        e = Execution(
+            results=[
+                Result(text="chart", is_main_result=False),
+                Result(text="42", is_main_result=True),
+            ]
+        )
+        assert e.text == "42"
+
+    def test_execution_error(self):
+        err = ExecutionError(
+            name="ZeroDivisionError",
+            value="division by zero",
+            traceback="Traceback ...\nZeroDivisionError: division by zero",
+        )
+        e = Execution(error=err)
+        assert e.error is not None
+        assert "ZeroDivisionError" in e.error.name
+
+    def test_logs(self):
+        logs = Logs(stdout=["hello\n", "world\n"], stderr=["warn\n"])
+        assert "".join(logs.stdout) == "hello\nworld\n"
+        assert "".join(logs.stderr) == "warn\n"


 class TestDeprecationWarnings:
-    def test_import_sandbox_from_capsule_warns(self):
-        import warnings
-
-        import wrenn.capsule as capsule_mod
-
-        with warnings.catch_warnings(record=True) as w:
-            warnings.simplefilter("always")
-            klass = capsule_mod.Sandbox
-            assert klass is Capsule
-            assert len(w) == 1
-            assert issubclass(w[0].category, DeprecationWarning)
-            assert "Sandbox" in str(w[0].message)
-
    def test_import_sandbox_from_wrenn_warns(self):
+        import sys
        import warnings

+        # Clear cached attribute
+        if "Sandbox" in dir(sys.modules.get("wrenn", object())):
+            delattr(sys.modules["wrenn"], "Sandbox")
+
        with warnings.catch_warnings(record=True) as w:
            warnings.simplefilter("always")
            from wrenn import Sandbox

            assert Sandbox is Capsule
-            assert any(issubclass(x.category, DeprecationWarning) for x in w)
-
-    def test_client_sandboxes_property_warns(self):
-        import warnings
-
-        with WrennClient(api_key="wrn_test1234567890abcdef12345678") as c:
-            with warnings.catch_warnings(record=True) as w:
-                warnings.simplefilter("always")
-                resource = c.sandboxes
-                assert resource is c.capsules
-                assert len(w) == 1
-                assert issubclass(w[0].category, DeprecationWarning)
-                assert "sandboxes" in str(w[0].message)
+            fw = [x for x in w if issubclass(x.category, FutureWarning)]
+            assert len(fw) >= 1
+            assert "Sandbox" in str(fw[0].message)
--- a/tests/test_client.py
+++ b/tests/test_client.py
@ -8,112 +8,38 @@ from wrenn.exceptions import (
    WrennAgentError,
    WrennAuthenticationError,
    WrennConflictError,
-    WrennForbiddenError,
-    WrennHostHasCapsulesError,
    WrennInternalError,
    WrennNotFoundError,
    WrennValidationError,
 )
 from wrenn.models import (
-    APIKeyResponse,
    Capsule,
-    CreateHostResponse,
-    Host,
-    SignupResponse,
    Status,
    Template,
-    UsageResponse,
 )

+BASE = "https://app.wrenn.dev/api"
+

@pytest.fixture
 def client():
-    with WrennClient(
-        api_key="wrn_test1234567890abcdef12345678", token="jwt-test-token-abc123"
-    ) as c:
+    with WrennClient(api_key="wrn_test1234567890abcdef12345678", base_url=BASE) as c:
        yield c


@pytest.fixture
 def async_client():
-    return AsyncWrennClient(
-        api_key="wrn_test1234567890abcdef12345678", token="jwt-test-token-abc123"
-    )
-
-
-class TestAuth:
-    @respx.mock
-    def test_signup(self, client):
-        respx.post("https://api.wrenn.dev/v1/auth/signup").respond(
-            201,
-            json={"message": "Account created. Check your email to activate."},
-        )
-        resp = client.auth.signup("a@b.com", "password123", "Test User")
-        assert isinstance(resp, SignupResponse)
-        assert resp.message is not None
-
-    @respx.mock
-    def test_signup_no_creds(self):
-        respx.post("https://api.wrenn.dev/v1/auth/signup").respond(
-            201,
-            json={"message": "Account created."},
-        )
-        with WrennClient() as c:
-            resp = c.auth.signup("a@b.com", "password123", "Test User")
-            assert isinstance(resp, SignupResponse)
-
-    @respx.mock
-    def test_login(self, client):
-        respx.post("https://api.wrenn.dev/v1/auth/login").respond(
-            200,
-            json={"token": "jwt-token", "email": "a@b.com"},
-        )
-        resp = client.auth.login("a@b.com", "password123")
-        assert resp.token == "jwt-token"
-
-
-class TestAPIKeys:
-    @respx.mock
-    def test_create(self, client):
-        respx.post("https://api.wrenn.dev/v1/api-keys").respond(
-            201,
-            json={
-                "id": "key-1",
-                "name": "my-key",
-                "key_prefix": "wrn_ab12cd34",
-                "key": "wrn_ab12cd34fullkey",
-            },
-        )
-        resp = client.api_keys.create(name="my-key")
-        assert isinstance(resp, APIKeyResponse)
-        assert resp.name == "my-key"
-        assert resp.key == "wrn_ab12cd34fullkey"
-
-    @respx.mock
-    def test_list(self, client):
-        respx.get("https://api.wrenn.dev/v1/api-keys").respond(
-            200,
-            json=[{"id": "key-1", "name": "k1"}, {"id": "key-2", "name": "k2"}],
-        )
-        keys = client.api_keys.list()
-        assert len(keys) == 2
-        assert keys[0].id == "key-1"
-
-    @respx.mock
-    def test_delete(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/api-keys/key-1").respond(204)
-        client.api_keys.delete("key-1")
-        assert route.called
+    return AsyncWrennClient(api_key="wrn_test1234567890abcdef12345678", base_url=BASE)


 class TestCapsules:
    @respx.mock
    def test_create(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201,
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202,
            json={
                "id": "sb-1",
-                "status": "pending",
+                "status": "starting",
                "template": "base-python",
                "vcpus": 2,
                "memory_mb": 1024,
@ -122,19 +48,19 @@ class TestCapsules:
        resp = client.capsules.create(template="base-python", vcpus=2, memory_mb=1024)
        assert isinstance(resp, Capsule)
        assert resp.id == "sb-1"
-        assert resp.status == Status.pending
+        assert resp.status == Status.starting

    @respx.mock
    def test_create_defaults(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
-            201, json={"id": "sb-2", "status": "pending"}
+        respx.post(f"{BASE}/v1/capsules").respond(
+            202, json={"id": "sb-2", "status": "starting"}
        )
        resp = client.capsules.create()
        assert resp.id == "sb-2"

    @respx.mock
    def test_list(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules").respond(
+        respx.get(f"{BASE}/v1/capsules").respond(
            200, json=[{"id": "sb-1", "status": "running"}]
        )
        boxes = client.capsules.list()
@ -143,7 +69,7 @@ class TestCapsules:

    @respx.mock
    def test_get(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/sb-1").respond(
+        respx.get(f"{BASE}/v1/capsules/sb-1").respond(
            200, json={"id": "sb-1", "status": "running"}
        )
        resp = client.capsules.get("sb-1")
@ -151,49 +77,37 @@ class TestCapsules:

    @respx.mock
    def test_destroy(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/capsules/sb-1").respond(204)
+        route = respx.delete(f"{BASE}/v1/capsules/sb-1").respond(202)
        client.capsules.destroy("sb-1")
        assert route.called

    @respx.mock
-    def test_usage(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/usage").respond(
-            200,
-            json={
-                "from": "2026-03-21",
-                "to": "2026-04-20",
-                "points": [
-                    {
-                        "date": "2026-04-19",
-                        "cpu_minutes": 12.5,
-                        "ram_mb_minutes": 640.0,
-                    },
-                    {"date": "2026-04-20", "cpu_minutes": 8.0, "ram_mb_minutes": 512.0},
-                ],
-            },
+    def test_pause(self, client):
+        respx.post(f"{BASE}/v1/capsules/sb-1/pause").respond(
+            202, json={"id": "sb-1", "status": "pausing"}
        )
-        resp = client.capsules.usage()
-        assert isinstance(resp, UsageResponse)
-        assert resp.points is not None
-        assert len(resp.points) == 2
-        assert resp.points[0].cpu_minutes == 12.5
+        resp = client.capsules.pause("sb-1")
+        assert resp.status == Status.pausing

    @respx.mock
-    def test_usage_with_dates(self, client):
-        route = respx.get("https://api.wrenn.dev/v1/capsules/usage").respond(
-            200,
-            json={"from": "2026-04-01", "to": "2026-04-15", "points": []},
+    def test_resume(self, client):
+        respx.post(f"{BASE}/v1/capsules/sb-1/resume").respond(
+            202, json={"id": "sb-1", "status": "resuming"}
        )
-        client.capsules.usage(from_date="2026-04-01", to_date="2026-04-15")
-        req = route.calls[0].request
-        assert "from=2026-04-01" in str(req.url)
-        assert "to=2026-04-15" in str(req.url)
+        resp = client.capsules.resume("sb-1")
+        assert resp.status == Status.resuming
+
+    @respx.mock
+    def test_ping(self, client):
+        route = respx.post(f"{BASE}/v1/capsules/sb-1/ping").respond(204)
+        client.capsules.ping("sb-1")
+        assert route.called


 class TestSnapshots:
    @respx.mock
    def test_create(self, client):
-        respx.post("https://api.wrenn.dev/v1/snapshots").respond(
+        respx.post(f"{BASE}/v1/snapshots").respond(
            201,
            json={"name": "snap-1", "type": "snapshot", "vcpus": 1},
        )
@ -203,7 +117,7 @@ class TestSnapshots:

    @respx.mock
    def test_create_with_overwrite(self, client):
-        route = respx.post("https://api.wrenn.dev/v1/snapshots").respond(
+        route = respx.post(f"{BASE}/v1/snapshots").respond(
            201, json={"name": "snap-1", "type": "snapshot"}
        )
        client.snapshots.create(capsule_id="sb-1", overwrite=True)
@ -212,7 +126,7 @@ class TestSnapshots:

    @respx.mock
    def test_list(self, client):
-        respx.get("https://api.wrenn.dev/v1/snapshots").respond(
+        respx.get(f"{BASE}/v1/snapshots").respond(
            200, json=[{"name": "base-python", "type": "base"}]
        )
        snaps = client.snapshots.list()
@ -220,92 +134,22 @@ class TestSnapshots:

    @respx.mock
    def test_list_with_filter(self, client):
-        route = respx.get("https://api.wrenn.dev/v1/snapshots").respond(200, json=[])
+        route = respx.get(f"{BASE}/v1/snapshots").respond(200, json=[])
        client.snapshots.list(type="snapshot")
        req = route.calls[0].request
        assert "type=snapshot" in str(req.url)

    @respx.mock
    def test_delete(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/snapshots/snap-1").respond(204)
+        route = respx.delete(f"{BASE}/v1/snapshots/snap-1").respond(204)
        client.snapshots.delete("snap-1")
        assert route.called


-class TestHosts:
-    @respx.mock
-    def test_create(self, client):
-        respx.post("https://api.wrenn.dev/v1/hosts").respond(
-            201,
-            json={
-                "host": {"id": "h-1", "type": "regular", "status": "pending"},
-                "registration_token": "reg-tok-123",
-            },
-        )
-        resp = client.hosts.create(type="regular")
-        assert isinstance(resp, CreateHostResponse)
-        assert resp.registration_token == "reg-tok-123"
-
-    @respx.mock
-    def test_list(self, client):
-        respx.get("https://api.wrenn.dev/v1/hosts").respond(
-            200, json=[{"id": "h-1", "status": "online"}]
-        )
-        hosts = client.hosts.list()
-        assert len(hosts) == 1
-        assert isinstance(hosts[0], Host)
-
-    @respx.mock
-    def test_get(self, client):
-        respx.get("https://api.wrenn.dev/v1/hosts/h-1").respond(
-            200, json={"id": "h-1", "status": "online"}
-        )
-        resp = client.hosts.get("h-1")
-        assert resp.id == "h-1"
-
-    @respx.mock
-    def test_delete(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/hosts/h-1").respond(204)
-        client.hosts.delete("h-1")
-        assert route.called
-
-    @respx.mock
-    def test_regenerate_token(self, client):
-        respx.post("https://api.wrenn.dev/v1/hosts/h-1/token").respond(
-            201,
-            json={
-                "host": {"id": "h-1"},
-                "registration_token": "new-tok",
-            },
-        )
-        resp = client.hosts.regenerate_token("h-1")
-        assert resp.registration_token == "new-tok"
-
-    @respx.mock
-    def test_list_tags(self, client):
-        respx.get("https://api.wrenn.dev/v1/hosts/h-1/tags").respond(
-            200, json=["gpu", "high-mem"]
-        )
-        tags = client.hosts.list_tags("h-1")
-        assert tags == ["gpu", "high-mem"]
-
-    @respx.mock
-    def test_add_tag(self, client):
-        route = respx.post("https://api.wrenn.dev/v1/hosts/h-1/tags").respond(204)
-        client.hosts.add_tag("h-1", "gpu")
-        assert route.called
-
-    @respx.mock
-    def test_remove_tag(self, client):
-        route = respx.delete("https://api.wrenn.dev/v1/hosts/h-1/tags/gpu").respond(204)
-        client.hosts.remove_tag("h-1", "gpu")
-        assert route.called
-
-
 class TestErrorHandling:
    @respx.mock
    def test_validation_error(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
+        respx.post(f"{BASE}/v1/capsules").respond(
            400,
            json={"error": {"code": "invalid_request", "message": "bad input"}},
        )
@ -316,25 +160,16 @@ class TestErrorHandling:

    @respx.mock
    def test_auth_error(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules").respond(
+        respx.get(f"{BASE}/v1/capsules").respond(
            401,
            json={"error": {"code": "unauthorized", "message": "bad key"}},
        )
        with pytest.raises(WrennAuthenticationError):
            client.capsules.list()

-    @respx.mock
-    def test_forbidden_error(self, client):
-        respx.post("https://api.wrenn.dev/v1/hosts").respond(
-            403,
-            json={"error": {"code": "forbidden", "message": "nope"}},
-        )
-        with pytest.raises(WrennForbiddenError):
-            client.hosts.create(type="regular")
-
    @respx.mock
    def test_not_found_error(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/nope").respond(
+        respx.get(f"{BASE}/v1/capsules/nope").respond(
            404,
            json={"error": {"code": "not_found", "message": "capsule not found"}},
        )
@ -343,32 +178,16 @@ class TestErrorHandling:

    @respx.mock
    def test_conflict_error(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/sb-1").respond(
+        respx.get(f"{BASE}/v1/capsules/sb-1").respond(
            409,
            json={"error": {"code": "invalid_state", "message": "not running"}},
        )
        with pytest.raises(WrennConflictError):
            client.capsules.get("sb-1")

-    @respx.mock
-    def test_host_has_capsules_error(self, client):
-        respx.delete("https://api.wrenn.dev/v1/hosts/h-1").respond(
-            409,
-            json={
-                "error": {
-                    "code": "host_has_capsules",
-                    "message": "host has running capsules",
-                },
-                "sandbox_ids": ["sb-1", "sb-2"],
-            },
-        )
-        with pytest.raises(WrennHostHasCapsulesError) as exc_info:
-            client.hosts.delete("h-1")
-        assert exc_info.value.capsule_ids == ["sb-1", "sb-2"]
-
    @respx.mock
    def test_agent_error(self, client):
-        respx.post("https://api.wrenn.dev/v1/capsules").respond(
+        respx.post(f"{BASE}/v1/capsules").respond(
            502,
            json={"error": {"code": "agent_error", "message": "host agent failed"}},
        )
@ -377,7 +196,7 @@ class TestErrorHandling:

    @respx.mock
    def test_internal_error(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/sb-1").respond(
+        respx.get(f"{BASE}/v1/capsules/sb-1").respond(
            500,
            json={"error": {"code": "internal_error", "message": "oops"}},
        )
@ -386,7 +205,7 @@ class TestErrorHandling:

    @respx.mock
    def test_unknown_error_code_falls_back(self, client):
-        respx.get("https://api.wrenn.dev/v1/capsules/sb-1").respond(
+        respx.get(f"{BASE}/v1/capsules/sb-1").respond(
            418,
            json={"error": {"code": "teapot", "message": "I'm a teapot"}},
        )
@ -398,92 +217,19 @@ class TestErrorHandling:


 class TestAuthModes:
-    def test_api_key_only_creates_data_client(self):
+    def test_api_key_header(self):
        with WrennClient(api_key="wrn_test1234567890abcdef12345678") as c:
-            assert c._data_http is not None
-            assert (
-                c._data_http.headers["X-API-Key"] == "wrn_test1234567890abcdef12345678"
-            )
-            assert c._mgmt_http is None
+            assert c._http.headers["X-API-Key"] == "wrn_test1234567890abcdef12345678"

-    def test_token_only_creates_mgmt_client(self):
-        with WrennClient(token="jwt-token-abc") as c:
-            assert c._mgmt_http is not None
-            assert c._mgmt_http.headers["Authorization"] == "Bearer jwt-token-abc"
-            assert c._data_http is None
+    def test_no_auth_raises(self, monkeypatch):
+        monkeypatch.delenv("WRENN_API_KEY", raising=False)
+        with pytest.raises(ValueError, match="No API key"):
+            WrennClient()

-    def test_no_auth_allowed(self):
+    def test_env_var_fallback(self, monkeypatch):
+        monkeypatch.setenv("WRENN_API_KEY", "wrn_from_env")
        with WrennClient() as c:
-            assert c._data_http is None
-            assert c._mgmt_http is None
-            assert c._public_http is not None
-
-    def test_both_creds_creates_both_clients(self):
-        with WrennClient(
-            api_key="wrn_test1234567890abcdef12345678", token="jwt-abc"
-        ) as c:
-            assert c._data_http is not None
-            assert c._mgmt_http is not None
-
-    def test_capsule_ops_require_api_key(self):
-        with WrennClient(token="jwt-abc") as c:
-            with pytest.raises(ValueError, match="API key"):
-                c.capsules.list()
-
-    def test_snapshot_ops_require_api_key(self):
-        with WrennClient(token="jwt-abc") as c:
-            with pytest.raises(ValueError, match="API key"):
-                c.snapshots.list()
-
-    def test_mgmt_ops_require_token(self):
-        with WrennClient(api_key="wrn_test1234567890abcdef12345678") as c:
-            with pytest.raises(ValueError, match="JWT token"):
-                c.api_keys.list()
-            with pytest.raises(ValueError, match="JWT token"):
-                c.teams.list()
-            with pytest.raises(ValueError, match="JWT token"):
-                c.hosts.list()
-            with pytest.raises(ValueError, match="JWT token"):
-                c.channels.list()
-            with pytest.raises(ValueError, match="JWT token"):
-                c.users.search("a@b.com")
-            with pytest.raises(ValueError, match="JWT token"):
-                c.account.get()
-            with pytest.raises(ValueError, match="JWT token"):
-                c.auth.switch_team("team-1")
-
-    @respx.mock
-    def test_mgmt_sends_bearer_only(self):
-        route = respx.get("https://api.wrenn.dev/v1/api-keys").respond(200, json=[])
-        with WrennClient(
-            api_key="wrn_test1234567890abcdef12345678", token="jwt-abc"
-        ) as c:
-            c.api_keys.list()
-        req = route.calls[0].request
-        assert req.headers["Authorization"] == "Bearer jwt-abc"
-        assert "X-API-Key" not in req.headers
-
-    @respx.mock
-    def test_data_sends_api_key_only(self):
-        route = respx.get("https://api.wrenn.dev/v1/capsules").respond(200, json=[])
-        with WrennClient(
-            api_key="wrn_test1234567890abcdef12345678", token="jwt-abc"
-        ) as c:
-            c.capsules.list()
-        req = route.calls[0].request
-        assert req.headers["X-API-Key"] == "wrn_test1234567890abcdef12345678"
-        assert "Authorization" not in req.headers
-
-    @respx.mock
-    def test_public_sends_no_auth(self):
-        route = respx.post("https://api.wrenn.dev/v1/auth/signup").respond(
-            201, json={"message": "ok"}
-        )
-        with WrennClient() as c:
-            c.auth.signup("a@b.com", "password123", "Test")
-        req = route.calls[0].request
-        assert "X-API-Key" not in req.headers
-        assert "Authorization" not in req.headers
+            assert c._http.headers["X-API-Key"] == "wrn_from_env"


 class TestAsyncClient:
@ -491,8 +237,8 @@ class TestAsyncClient:
    @respx.mock
    async def test_async_capsules_create(self, async_client):
        async with async_client:
-            respx.post("https://api.wrenn.dev/v1/capsules").respond(
-                201, json={"id": "sb-1", "status": "pending"}
+            respx.post(f"{BASE}/v1/capsules").respond(
+                202, json={"id": "sb-1", "status": "starting"}
            )
            resp = await async_client.capsules.create(template="base-python")
            assert resp.id == "sb-1"
@ -501,25 +247,15 @@ class TestAsyncClient:
    @respx.mock
    async def test_async_capsules_list(self, async_client):
        async with async_client:
-            respx.get("https://api.wrenn.dev/v1/capsules").respond(
-                200, json=[{"id": "sb-1"}]
-            )
+            respx.get(f"{BASE}/v1/capsules").respond(200, json=[{"id": "sb-1"}])
            boxes = await async_client.capsules.list()
            assert len(boxes) == 1

-    @pytest.mark.asyncio
-    @respx.mock
-    async def test_async_hosts_list(self, async_client):
-        async with async_client:
-            respx.get("https://api.wrenn.dev/v1/hosts").respond(200, json=[])
-            hosts = await async_client.hosts.list()
-            assert hosts == []
-
    @pytest.mark.asyncio
    @respx.mock
    async def test_async_error_handling(self, async_client):
        async with async_client:
-            respx.get("https://api.wrenn.dev/v1/capsules/nope").respond(
+            respx.get(f"{BASE}/v1/capsules/nope").respond(
                404,
                json={"error": {"code": "not_found", "message": "not found"}},
            )
--- a/tests/test_filesystem_pty.py
+++ b/tests/test_filesystem_pty.py
@ -8,7 +8,6 @@ import pytest
 import respx

 from wrenn.capsule import Capsule
-from wrenn.client import WrennClient
 from wrenn.models import FileEntry
 from wrenn.pty import (
    AsyncPtySession,
@ -17,25 +16,59 @@ from wrenn.pty import (
    _parse_pty_event,
 )

-
-@pytest.fixture
-def client():
-    with WrennClient(api_key="wrn_test1234567890abcdef12345678") as c:
-        yield c
+BASE = "https://app.wrenn.dev/api"


-def _make_capsule(client: WrennClient, cap_id: str = "cl-abc") -> Capsule:
-    respx.post("https://api.wrenn.dev/v1/capsules").respond(
+def _make_capsule(cap_id: str = "cl-abc") -> Capsule:
+    respx.post(f"{BASE}/v1/capsules").respond(
        201, json={"id": cap_id, "status": "running"}
    )
-    return client.capsules.create()
+    return Capsule(api_key="wrn_test1234567890abcdef12345678", base_url=BASE)


-class TestListDir:
+class TestFilesRead:
    @respx.mock
-    def test_list_dir_returns_entries(self, client):
-        cap = _make_capsule(client)
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/list").respond(
+    def test_read_returns_string(self):
+        cap = _make_capsule()
+        content = b"file contents here"
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/read").respond(
+            200, content=content
+        )
+        data = cap.files.read("/app/main.py")
+        assert data == "file contents here"
+
+    @respx.mock
+    def test_read_bytes(self):
+        cap = _make_capsule()
+        content = b"\x00\x01\x02"
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/read").respond(
+            200, content=content
+        )
+        data = cap.files.read_bytes("/bin/binary")
+        assert data == b"\x00\x01\x02"
+
+
+class TestFilesWrite:
+    @respx.mock
+    def test_write_string(self):
+        cap = _make_capsule()
+        route = respx.post(f"{BASE}/v1/capsules/cl-abc/files/write").respond(204)
+        cap.files.write("/app/main.py", "print('hello')")
+        assert route.called
+
+    @respx.mock
+    def test_write_bytes(self):
+        cap = _make_capsule()
+        route = respx.post(f"{BASE}/v1/capsules/cl-abc/files/write").respond(204)
+        cap.files.write("/app/data.bin", b"\x00\x01\x02")
+        assert route.called
+
+
+class TestFilesList:
+    @respx.mock
+    def test_list_returns_entries(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
            200,
            json={
                "entries": [
@ -66,7 +99,7 @@ class TestListDir:
                ]
            },
        )
-        entries = cap.list_dir("/home/user")
+        entries = cap.files.list("/home/user")
        assert len(entries) == 2
        assert isinstance(entries[0], FileEntry)
        assert entries[0].name == "main.py"
@ -75,57 +108,30 @@ class TestListDir:
        assert entries[1].type == "directory"

    @respx.mock
-    def test_list_dir_with_depth(self, client):
-        cap = _make_capsule(client)
-        route = respx.post(
-            "https://api.wrenn.dev/v1/capsules/cl-abc/files/list"
-        ).respond(200, json={"entries": []})
-        cap.list_dir("/home/user", depth=3)
+    def test_list_with_depth(self):
+        cap = _make_capsule()
+        route = respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
+            200, json={"entries": []}
+        )
+        cap.files.list("/home/user", depth=3)
        body = json.loads(route.calls[0].request.content)
        assert body["depth"] == 3

    @respx.mock
-    def test_list_dir_empty(self, client):
-        cap = _make_capsule(client)
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/list").respond(
+    def test_list_empty(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
            200, json={"entries": []}
        )
-        entries = cap.list_dir("/empty")
+        entries = cap.files.list("/empty")
        assert entries == []

-    @respx.mock
-    def test_list_dir_symlink(self, client):
-        cap = _make_capsule(client)
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/list").respond(
-            200,
-            json={
-                "entries": [
-                    {
-                        "name": "link",
-                        "path": "/home/user/link",
-                        "type": "symlink",
-                        "size": 4,
-                        "mode": 41471,
-                        "permissions": "lrwxrwxrwx",
-                        "owner": "root",
-                        "group": "root",
-                        "modified_at": 1712899000,
-                        "symlink_target": "/bin",
-                    }
-                ]
-            },
-        )
-        entries = cap.list_dir("/home/user")
-        assert len(entries) == 1
-        assert entries[0].type == "symlink"
-        assert entries[0].symlink_target == "/bin"

-
-class TestMkdir:
+class TestFilesMakeDir:
    @respx.mock
-    def test_mkdir_returns_entry(self, client):
-        cap = _make_capsule(client)
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/mkdir").respond(
+    def test_make_dir_returns_entry(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/mkdir").respond(
            200,
            json={
                "entry": {
@ -142,19 +148,19 @@ class TestMkdir:
                }
            },
        )
-        entry = cap.mkdir("/home/user/data")
+        entry = cap.files.make_dir("/home/user/data")
        assert isinstance(entry, FileEntry)
        assert entry.name == "data"
        assert entry.type == "directory"

    @respx.mock
-    def test_mkdir_existing_returns_gracefully(self, client):
-        cap = _make_capsule(client)
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/mkdir").respond(
+    def test_make_dir_existing_returns_gracefully(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/mkdir").respond(
            409,
            json={"error": {"code": "conflict", "message": "already exists"}},
        )
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/list").respond(
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
            200,
            json={
                "entries": [
@ -173,52 +179,48 @@ class TestMkdir:
                ]
            },
        )
-        entry = cap.mkdir("/home/user/data")
+        entry = cap.files.make_dir("/home/user/data")
        assert entry.name == "data"


-class TestRemove:
+class TestFilesRemove:
    @respx.mock
-    def test_remove_succeeds(self, client):
-        cap = _make_capsule(client)
-        route = respx.post(
-            "https://api.wrenn.dev/v1/capsules/cl-abc/files/remove"
-        ).respond(204)
-        cap.remove("/home/user/old_data")
+    def test_remove_succeeds(self):
+        cap = _make_capsule()
+        route = respx.post(f"{BASE}/v1/capsules/cl-abc/files/remove").respond(204)
+        cap.files.remove("/home/user/old_data")
        assert route.called

    @respx.mock
-    def test_remove_sends_path(self, client):
-        cap = _make_capsule(client)
-        route = respx.post(
-            "https://api.wrenn.dev/v1/capsules/cl-abc/files/remove"
-        ).respond(204)
-        cap.remove("/tmp/test.txt")
+    def test_remove_sends_path(self):
+        cap = _make_capsule()
+        route = respx.post(f"{BASE}/v1/capsules/cl-abc/files/remove").respond(204)
+        cap.files.remove("/tmp/test.txt")
        body = json.loads(route.calls[0].request.content)
        assert body["path"] == "/tmp/test.txt"


-class TestUpload:
+class TestFilesExists:
    @respx.mock
-    def test_upload_sends_multipart(self, client):
-        cap = _make_capsule(client)
-        route = respx.post(
-            "https://api.wrenn.dev/v1/capsules/cl-abc/files/write"
-        ).respond(204)
-        cap.upload("/app/main.py", b"print('hello')")
-        assert route.called
-        req = route.calls[0].request
-        assert b"multipart/form-data" in req.headers.get("content-type", "").encode()
+    def test_exists_true(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
+            200,
+            json={
+                "entries": [
+                    {"name": "hello.txt", "path": "/tmp/hello.txt", "type": "file"}
+                ]
+            },
+        )
+        assert cap.files.exists("/tmp/hello.txt") is True

    @respx.mock
-    def test_download_returns_bytes(self, client):
-        cap = _make_capsule(client)
-        content = b"file contents here"
-        respx.post("https://api.wrenn.dev/v1/capsules/cl-abc/files/read").respond(
-            200, content=content
+    def test_exists_false(self):
+        cap = _make_capsule()
+        respx.post(f"{BASE}/v1/capsules/cl-abc/files/list").respond(
+            200, json={"entries": []}
        )
-        data = cap.download("/app/main.py")
-        assert data == content
+        assert cap.files.exists("/tmp/nope.txt") is False


 class TestPtyEventParsing:
@ -254,11 +256,6 @@ class TestPtyEventParsing:
        assert event.data == "process not found"
        assert event.fatal is True

-    def test_error_event_non_fatal(self):
-        raw = {"type": "error", "data": "something", "fatal": False}
-        event = _parse_pty_event(raw)
-        assert event.fatal is False
-
    def test_ping_event(self):
        raw = {"type": "ping"}
        event = _parse_pty_event(raw)
@ -314,12 +311,14 @@ class TestPtySessionIteration:
        ws.receive_text.side_effect = messages
        session = PtySession(ws, "cl-abc")
        events = list(session)
-        assert len(events) == 2
+        assert len(events) == 3
        assert events[0].type == PtyEventType.started
        assert session.tag == "pty-abc12345"
        assert session.pid == 1
        assert events[1].type == PtyEventType.output
        assert events[1].data == b"hello"
+        assert events[2].type == PtyEventType.exit
+        assert events[2].exit_code == 0

    def test_iter_stops_on_fatal_error(self):
        ws = MagicMock()
@ -385,9 +384,6 @@ class TestPtySessionSendStart:
        assert sent["cmd"] == "/bin/zsh"
        assert sent["args"] == ["-l"]
        assert sent["cols"] == 120
-        assert sent["rows"] == 40
-        assert sent["envs"] == {"TERM": "xterm-256color"}
-        assert sent["cwd"] == "/home/user"


 class TestPtySessionSendConnect:
@ -453,16 +449,6 @@ class TestAsyncPtySession:
        assert sent["type"] == "start"
        assert sent["cmd"] == "/bin/zsh"
        assert sent["cols"] == 100
-        assert sent["rows"] == 30
-
-    @pytest.mark.asyncio
-    async def test_async_send_connect(self):
-        ws = AsyncMock()
-        session = AsyncPtySession(ws, "cl-abc")
-        await session._send_connect("pty-abc12345")
-        sent = json.loads(ws.send_text.call_args[0][0])
-        assert sent["type"] == "connect"
-        assert sent["tag"] == "pty-abc12345"

    @pytest.mark.asyncio
    async def test_async_iteration(self):
@ -477,10 +463,11 @@ class TestAsyncPtySession:
        events = []
        async for event in session:
            events.append(event)
-        assert len(events) == 2
+        assert len(events) == 3
        assert events[0].type == PtyEventType.started
        assert session.tag == "pty-xyz"
        assert session.pid == 5
+        assert events[2].type == PtyEventType.exit


 class TestExports:
--- a/tests/test_git.py
+++ b/tests/test_git.py
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@ -0,0 +1,405 @@
+from __future__ import annotations
+
+import os
+import time
+from pathlib import Path
+
+import pytest
+
+from wrenn import Capsule, CommandResult
+from wrenn.commands import CommandHandle, ProcessInfo
+from wrenn.models import Capsule as CapsuleModel, FileEntry, Status
+
+pytestmark = pytest.mark.integration
+
+_env_loaded = False
+
+
+def _ensure_env() -> None:
+    global _env_loaded
+    if _env_loaded:
+        return
+    _env_loaded = True
+    env_file = Path(__file__).resolve().parent.parent / ".env"
+    if not env_file.exists():
+        return
+    for line in env_file.read_text().splitlines():
+        line = line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        key, _, value = line.partition("=")
+        key, value = key.strip(), value.strip().strip("\"'")
+        if key and key not in os.environ:
+            os.environ[key] = value
+
+
+class TestCapsuleLifecycle:
+    """Each test manages its own capsule to test create/destroy paths."""
+
+    def setup_method(self):
+        _ensure_env()
+
+    def test_create_and_destroy(self):
+        capsule = Capsule()
+        capsule_id = capsule.capsule_id
+        try:
+            assert capsule_id
+            assert capsule.info is not None
+        finally:
+            capsule.destroy()
+
+        info = Capsule.get_info(capsule_id)
+        assert info.status in (Status.stopped, Status.missing)
+
+    def test_create_with_wait(self):
+        capsule = Capsule(wait=True)
+        try:
+            assert capsule.info is not None
+            assert capsule.info.status == Status.running
+        finally:
+            capsule.destroy()
+
+    def test_context_manager_destroys(self):
+        with Capsule(wait=True) as capsule:
+            capsule_id = capsule.capsule_id
+            assert capsule.is_running()
+
+        info = Capsule.get_info(capsule_id)
+        assert info.status in (Status.stopped, Status.missing)
+
+    def test_get_info(self):
+        capsule = Capsule(wait=True)
+        try:
+            info = capsule.get_info()
+            assert isinstance(info, CapsuleModel)
+            assert info.id == capsule.capsule_id
+            assert info.status == Status.running
+        finally:
+            capsule.destroy()
+
+    def test_pause_and_resume(self):
+        capsule = Capsule(wait=True)
+        try:
+            paused = capsule.pause()
+            assert paused.status == Status.paused
+            assert not capsule.is_running()
+
+            resumed = capsule.resume()
+            assert resumed.status == Status.running
+        finally:
+            capsule.destroy()
+
+    def test_static_destroy(self):
+        capsule = Capsule(wait=True)
+        capsule_id = capsule.capsule_id
+        try:
+            Capsule.destroy(capsule_id)
+        except Exception:
+            capsule.destroy()
+            raise
+
+        info = Capsule.get_info(capsule_id)
+        assert info.status in (Status.stopped, Status.missing)
+
+    def test_connect_to_existing(self):
+        capsule = Capsule(wait=True)
+        try:
+            connected = Capsule.connect(capsule.capsule_id)
+            assert connected.capsule_id == capsule.capsule_id
+            assert connected.info is not None
+            assert connected.info.status == Status.running
+        finally:
+            capsule.destroy()
+
+    def test_connect_resumes_paused(self):
+        capsule = Capsule(wait=True)
+        try:
+            capsule.pause()
+            connected = Capsule.connect(capsule.capsule_id)
+            assert connected.info is not None
+            assert connected.info.status == Status.running
+        finally:
+            capsule.destroy()
+
+    def test_list_capsules(self):
+        capsule = Capsule(wait=True)
+        try:
+            capsules = Capsule.list()
+            assert isinstance(capsules, list)
+            ids = [c.id for c in capsules]
+            assert capsule.capsule_id in ids
+        finally:
+            capsule.destroy()
+
+    def test_wait_ready(self):
+        capsule = Capsule()
+        try:
+            capsule.wait_ready(timeout=60)
+            assert capsule.is_running()
+        finally:
+            capsule.destroy()
+
+    def test_ping(self):
+        capsule = Capsule(wait=True)
+        try:
+            capsule.ping()
+        finally:
+            capsule.destroy()
+
+
+class TestCommands:
+    """Shared capsule for command execution tests."""
+
+    capsule: Capsule
+
+    @classmethod
+    def setup_class(cls):
+        _ensure_env()
+        cls.capsule = Capsule(wait=True)
+
+    @classmethod
+    def teardown_class(cls):
+        try:
+            cls.capsule.destroy()
+        except Exception:
+            pass
+
+    def test_run_foreground(self):
+        result = self.capsule.commands.run("echo hello")
+        assert isinstance(result, CommandResult)
+        assert result.exit_code == 0
+        assert "hello" in result.stdout
+
+    def test_run_stderr(self):
+        result = self.capsule.commands.run("echo error >&2")
+        assert "error" in result.stderr
+
+    def test_run_exit_code(self):
+        result = self.capsule.commands.run("exit 42")
+        assert result.exit_code == 42
+
+    def test_run_with_envs(self):
+        result = self.capsule.commands.run("export MY_VAR=test_value && echo $MY_VAR")
+        assert "test_value" in result.stdout
+
+    def test_run_with_cwd(self):
+        result = self.capsule.commands.run("cd /tmp && pwd")
+        assert result.stdout.strip() == "/tmp"
+
+    def test_run_multiline_output(self):
+        result = self.capsule.commands.run("echo -e 'line1\\nline2\\nline3'")
+        assert result.exit_code == 0
+        lines = result.stdout.strip().splitlines()
+        assert len(lines) == 3
+
+    def test_run_background(self):
+        handle = self.capsule.commands.run("sleep 30", background=True, tag="bg-test")
+        assert isinstance(handle, CommandHandle)
+        assert handle.pid > 0
+        assert handle.tag == "bg-test"
+        assert handle.capsule_id == self.capsule.capsule_id
+
+        self.capsule.commands.kill(handle.pid)
+
+    def test_list_processes(self):
+        handle = self.capsule.commands.run("sleep 30", background=True, tag="list-test")
+        try:
+            time.sleep(0.5)
+            processes = self.capsule.commands.list()
+            assert isinstance(processes, list)
+            pids = [p.pid for p in processes]
+            assert handle.pid in pids
+
+            proc = next(p for p in processes if p.pid == handle.pid)
+            assert isinstance(proc, ProcessInfo)
+        finally:
+            self.capsule.commands.kill(handle.pid)
+
+    def test_kill_process(self):
+        handle = self.capsule.commands.run("sleep 30", background=True)
+        self.capsule.commands.kill(handle.pid)
+        time.sleep(0.5)
+
+        processes = self.capsule.commands.list()
+        pids = [p.pid for p in processes]
+        assert handle.pid not in pids
+
+    def test_run_duration_ms(self):
+        result = self.capsule.commands.run("sleep 1")
+        assert result.duration_ms is None or result.duration_ms >= 900
+
+
+class TestFiles:
+    """Shared capsule for filesystem tests."""
+
+    capsule: Capsule
+
+    @classmethod
+    def setup_class(cls):
+        _ensure_env()
+        cls.capsule = Capsule(wait=True)
+
+    @classmethod
+    def teardown_class(cls):
+        try:
+            cls.capsule.destroy()
+        except Exception:
+            pass
+
+    def test_write_and_read(self):
+        self.capsule.files.write("/tmp/test.txt", "hello world")
+        content = self.capsule.files.read("/tmp/test.txt")
+        assert content == "hello world"
+
+    def test_write_and_read_bytes(self):
+        data = b"\x00\x01\x02\xff"
+        self.capsule.files.write("/tmp/test.bin", data)
+        result = self.capsule.files.read_bytes("/tmp/test.bin")
+        assert result == data
+
+    def test_list_directory(self):
+        self.capsule.files.write("/tmp/listdir/a.txt", "a")
+        self.capsule.files.write("/tmp/listdir/b.txt", "b")
+        entries = self.capsule.files.list("/tmp/listdir")
+        assert isinstance(entries, list)
+        names = [e.name for e in entries]
+        assert "a.txt" in names
+        assert "b.txt" in names
+
+    def test_exists(self):
+        self.capsule.files.write("/tmp/exists_test.txt", "x")
+        assert self.capsule.files.exists("/tmp/exists_test.txt")
+        assert not self.capsule.files.exists("/tmp/does_not_exist_xyz.txt")
+
+    def test_make_dir(self):
+        entry = self.capsule.files.make_dir("/tmp/newdir")
+        assert isinstance(entry, FileEntry)
+        assert self.capsule.files.exists("/tmp/newdir")
+
+    def test_make_dir_idempotent(self):
+        self.capsule.files.make_dir("/tmp/idempotent_dir")
+        entry = self.capsule.files.make_dir("/tmp/idempotent_dir")
+        assert isinstance(entry, FileEntry)
+
+    def test_remove_file(self):
+        self.capsule.files.write("/tmp/to_remove.txt", "delete me")
+        assert self.capsule.files.exists("/tmp/to_remove.txt")
+        self.capsule.files.remove("/tmp/to_remove.txt")
+        assert not self.capsule.files.exists("/tmp/to_remove.txt")
+
+    def test_remove_directory(self):
+        self.capsule.files.make_dir("/tmp/dir_to_remove")
+        self.capsule.files.write("/tmp/dir_to_remove/child.txt", "data")
+        self.capsule.files.remove("/tmp/dir_to_remove")
+        assert not self.capsule.files.exists("/tmp/dir_to_remove")
+
+    def test_write_creates_parent_dirs(self):
+        self.capsule.files.write("/tmp/deep/nested/dir/file.txt", "nested")
+        content = self.capsule.files.read("/tmp/deep/nested/dir/file.txt")
+        assert content == "nested"
+
+    def test_list_with_depth(self):
+        self.capsule.files.write("/tmp/depth_test/a/b.txt", "deep")
+        entries_shallow = self.capsule.files.list("/tmp/depth_test", depth=1)
+        entries_deep = self.capsule.files.list("/tmp/depth_test", depth=2)
+        assert len(entries_deep) >= len(entries_shallow)
+
+    def test_overwrite_file(self):
+        self.capsule.files.write("/tmp/overwrite.txt", "original")
+        self.capsule.files.write("/tmp/overwrite.txt", "updated")
+        content = self.capsule.files.read("/tmp/overwrite.txt")
+        assert content == "updated"
+
+    def test_upload_and_download_stream(self):
+        chunks = [b"chunk1", b"chunk2", b"chunk3"]
+        self.capsule.files.upload_stream("/tmp/streamed.bin", iter(chunks))
+        downloaded = b"".join(self.capsule.files.download_stream("/tmp/streamed.bin"))
+        assert downloaded == b"chunk1chunk2chunk3"
+
+
+class TestGit:
+    """Shared capsule for git operation tests.
+
+    Initializes a repo at /root (default cwd) since the exec API
+    does not support the cwd parameter.
+    """
+
+    capsule: Capsule
+
+    @classmethod
+    def setup_class(cls):
+        _ensure_env()
+        cls.capsule = Capsule(wait=True)
+        cls.capsule.git.init(".", initial_branch="main")
+        cls.capsule.git.configure_user("Test User", "test@example.com")
+
+    @classmethod
+    def teardown_class(cls):
+        try:
+            cls.capsule.destroy()
+        except Exception:
+            pass
+
+    def test_init_created_repo(self):
+        assert self.capsule.files.exists("/root/.git")
+
+    def test_status_clean(self):
+        status = self.capsule.git.status()
+        assert status.branch == "main"
+
+    def test_add_and_commit(self):
+        self.capsule.files.write("/root/hello.txt", "hello git")
+        self.capsule.git.add(all=True)
+        result = self.capsule.git.commit("initial commit")
+        assert result.exit_code == 0
+
+    def test_status_after_commit(self):
+        status = self.capsule.git.status()
+        assert status.is_clean
+
+    def test_status_with_changes(self):
+        self.capsule.files.write("/root/dirty.txt", "uncommitted")
+        try:
+            status = self.capsule.git.status()
+            assert not status.is_clean
+            paths = [f.path for f in status.files]
+            assert "dirty.txt" in paths
+        finally:
+            self.capsule.files.remove("/root/dirty.txt")
+
+    def test_branches(self):
+        branches = self.capsule.git.branches()
+        assert len(branches) >= 1
+        names = [b.name for b in branches]
+        assert "main" in names
+        current = [b for b in branches if b.is_current]
+        assert len(current) == 1
+
+    def test_create_and_checkout_branch(self):
+        self.capsule.git.create_branch("feature-1")
+        branches = self.capsule.git.branches()
+        names = [b.name for b in branches]
+        assert "feature-1" in names
+
+        current = [b for b in branches if b.is_current]
+        assert current[0].name == "feature-1"
+
+        self.capsule.git.checkout_branch("main")
+
+    def test_delete_branch(self):
+        self.capsule.git.create_branch("to-delete")
+        self.capsule.git.checkout_branch("main")
+        self.capsule.git.delete_branch("to-delete")
+
+        branches = self.capsule.git.branches()
+        names = [b.name for b in branches]
+        assert "to-delete" not in names
+
+    def test_set_and_get_config(self):
+        self.capsule.git.set_config("test.key", "test-value")
+        value = self.capsule.git.get_config("test.key")
+        assert value == "test-value"
+
+    def test_get_config_missing_returns_none(self):
+        value = self.capsule.git.get_config("nonexistent.key")
+        assert value is None
--- a/uv.lock
+++ b/uv.lock
@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = ">=3.13"
 resolution-markers = [
    "python_full_version >= '3.14'",
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 name = "wrenn"
-version = "0.1.0"
+version = "0.1.1"
 source = { editable = "." }
 dependencies = [
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@ -684,8 +1132,10 @@ dependencies = [

 [package.dev-dependencies]
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+    { name = "pydoc-markdown" },
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@ -702,8 +1152,10 @@ requires-dist = [

 [package.metadata.requires-dev]
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Author	SHA1	Message	Date
pptx704	e5e4e1a85b	fix: update SDK for v0.2.0 API compatibility Some checks failed ci/woodpecker/pr/check Pipeline failed Details Sync OpenAPI spec to v0.2.0, fix type annotation shadowing by using builtins.list in annotated signatures, guard poll interval lookup against None status, and reorder capsule ID assignment to validate before storing.	2026-05-16 17:57:20 +06:00
Tasnim Kabir Sadik	d9c028564e	Merge branch 'bugfix/timeout-related-issues' into dev Some checks failed ci/woodpecker/pr/check Pipeline failed Details	2026-05-02 21:53:33 +06:00
Tasnim Kabir Sadik	06b4a8cbcb	Merge issues fixed All checks were successful ci/woodpecker/pr/check Pipeline was successful Details	2026-05-02 21:46:16 +06:00
Tasnim Kabir Sadik	04e5dc652f	Fix error handling, resource leaks, and logic bugs across the SDK Bugs fixed: - files.py: use typed error checking (_raise_for_status) instead of raw raise_for_status(), ensuring WrennNotFoundError etc. are raised correctly - exceptions.py: check both "capsule_ids" and "sandbox_ids" response keys for backwards compatibility - code_interpreter: retry _ensure_kernel on 5xx errors (only fail on 4xx), remove redundant TimeoutError in bare except, clean up non-standard top-level msg_id/msg_type from Jupyter messages Resource leaks fixed: - capsule.py: close WrennClient if capsule creation or init fails - code_interpreter: add close()/__del__ for _proxy_client cleanup when not using context manager Logic fixes: - pty.py: yield exit events to callers instead of silently discarding them - capsule.py: auto-resume paused capsules in wait_ready instead of failing - capsule.py: log warnings on destroy failure in __exit__ instead of silently swallowing errors	2026-05-02 21:34:02 +06:00
Tasnim Kabir Sadik	4a7db8e204	fix: set httpx read timeout for long-running commands and handle non-JSON error responses - Set per-request httpx timeout (command timeout + 10s buffer) in Commands.run() and AsyncCommands.run() for foreground exec calls, preventing HTTP read timeouts on long-running commands - Raise WrennInternalError instead of raw httpx.HTTPStatusError when handle_response() encounters a non-JSON error body (e.g. 502 from a reverse proxy)	2026-05-02 19:02:39 +06:00
pptx704	a76be96682	Merge branch 'main' of git.omukk.dev:wrenn/python-sdk into dev	2026-05-02 05:07:13 +06:00
pptx704	be573d07a3	v0.1.1 (#7 ) Co-authored-by: Tasnim Kabir Sadik <tksadik92@gmail.com> Reviewed-on: #7 Co-authored-by: pptx704 <rafeed@omukk.dev> Co-committed-by: pptx704 <rafeed@omukk.dev>	2026-05-01 23:06:54 +00:00
pptx704	dc66ac24d5	Updated woodpecker def All checks were successful ci/woodpecker/pr/check Pipeline was successful Details	2026-05-02 04:50:11 +06:00
pptx704	b5e2b12ef1	Version bump and other minor changes	2026-05-02 04:45:05 +06:00
pptx704	213af4aee7	Increased timeout for long running API calls and updated typehints	2026-05-02 04:44:26 +06:00
pptx704	aa9477ffe8	Added doc generator for SDK All checks were successful ci/woodpecker/push/check Pipeline was successful Details	2026-04-24 00:01:20 +06:00
pptx704	2bb3dbd71d	Merge branch 'main' of git.omukk.dev:wrenn/python-sdk into dev	2026-04-23 23:53:15 +06:00
Rafeed M. Bhuiyan	d46a715839	v0.1.0 Some checks failed ci/woodpecker/push/check Pipeline was successful Details Publish to PyPI / Upload release to PyPI (push) Has been cancelled	2026-04-23 12:46:43 +00:00
Rafeed M. Bhuiyan	3f26a2fbcf	Merge branch 'main' into dev Some checks failed ci/woodpecker/push/check Pipeline was canceled Details	2026-04-23 12:38:41 +00:00
pptx704	2faf0dd0ae	Updated woodpecker config All checks were successful ci/woodpecker/push/check Pipeline was successful Details	2026-04-23 18:36:35 +06:00
pptx704	68c7d0de42	ci: add test pipeline, PyPI release workflow, and lint fixes - Update Woodpecker to run unit and integration tests in parallel - Add GitHub Actions workflow for PyPI trusted publishing on main - Add license, classifiers, keywords, and URLs to pyproject.toml - Fix ruff lint errors (unused imports, duplicate class name) and formatting	2026-04-23 18:32:59 +06:00
Rafeed M. Bhuiyan	ad64c85393	Merge pull request 'Feat: Added git support' (#5 ) from feat/git-support into dev Some checks failed ci/woodpecker/push/check Pipeline failed Details Reviewed-on: #5	2026-04-22 23:45:36 +00:00
pptx704	bab53aedbe	Updated readme	2026-04-23 05:44:49 +06:00
pptx704	82e181dd7e	test: add integration tests for capsule lifecycle, commands, files, and git 43 tests across 4 classes hitting the live API. Shared capsule per class to minimize VM boot overhead. All capsules destroyed in teardown. Skips automatically when WRENN_API_KEY is not available.	2026-04-23 05:40:06 +06:00
pptx704	ee1f55635f	fix: wrap commands in /bin/sh -c for proper server-side argv expansion The server-side agent runs commands through a nice wrapper that uses "${@}" expansion. Sending the full command string as a single cmd field caused nice to treat it as one executable name. Now Commands.run sends cmd=/bin/sh args=["-c", cmd_string] so "${@}" expands into proper argv.	2026-04-23 05:16:08 +06:00
pptx704	6bdf28e2ae	Added git integration	2026-04-23 04:46:57 +06:00
pptx704	61bc040098	Minor patches Some checks failed ci/woodpecker/push/check Pipeline failed Details	2026-04-23 02:31:47 +06:00
pptx704	7b35ffb60c	docs: add Google-style docstrings to all public SDK methods Some checks failed ci/woodpecker/push/check Pipeline failed Details	2026-04-17 04:29:34 +06:00
pptx704	42bcc792d6	Updated dependency Some checks failed ci/woodpecker/push/check Pipeline failed Details	2026-04-17 03:29:45 +06:00
pptx704	3f97c73b2f	feat: redesign code interpreter with structured Execution model Some checks failed ci/woodpecker/push/check Pipeline failed Details Replace flat CodeResult with a proper model hierarchy: Execution (top-level), Result (per-output with typed MIME fields), Logs (stdout/stderr as lists), and ExecutionError (structured name/value/traceback). Handle display_data messages for rich output, add streaming callbacks (on_result, on_stdout, on_stderr, on_error), and remove the misleading stdout-to-text fallback. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-04-17 03:16:39 +06:00
Rafeed M. Bhuiyan	7e7ecbd48a	Merge pull request 'feat: implement client architecture and sandbox environment' (#3 ) from feat/client-and-sandbox-support into dev Some checks failed ci/woodpecker/push/check Pipeline failed Details Reviewed-on: #3	2026-04-15 15:35:40 +00:00
pptx704	7b9a06d1b5	chore: add python-dotenv dependency Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-15 21:33:53 +06:00
pptx704	3d0eda5c60	feat: rename kill to destroy, improve code interpreter, update README - Rename Capsule.kill/AsyncCapsule.kill to destroy for frontend consistency - Add Sandbox deprecation alias to wrenn.code_interpreter module - run_code text falls back to stripped stdout when no expression result - Strip quotes from string expression results (matching e2b behavior) - _ensure_kernel reuses existing Jupyter kernels before creating new ones - Rewrite README with complete examples for capsules and code interpreter - Remove stale AGENTS.md Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-15 18:58:59 +06:00
pptx704	eecf1dc65b	chore: update OpenAPI schema, generated models, and build config Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-15 15:31:07 +06:00
pptx704	3cced768a4	feat: redesign SDK with e2b-compatible interface Replace the WrennClient-centric API with a top-level Capsule class that mirrors e2b's Sandbox interface, enabling drop-in migration. Key changes: - Capsule/AsyncCapsule with direct construction (reads WRENN_API_KEY and WRENN_BASE_URL env vars), namespaced sub-objects (capsule.commands, capsule.files), dual instance/static lifecycle methods via _DualMethod descriptor (capsule.kill() and Capsule.kill(id)) - WrennClient simplified to API-key-only endpoints (capsules, snapshots); JWT-based resources (auth, hosts, teams) removed - wrenn.code_interpreter submodule with Capsule subclass defaulting to code-runner-beta template and run_code() support - Sandbox alias emits FutureWarning instead of DeprecationWarning Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-15 15:19:23 +06:00
Tasnim Kabir Sadik	2ad8cdebc1	Merge pull request 'Initial project structure' (#1 ) from dev into main Reviewed-on: #1	2026-04-09 15:26:06 +00:00