Add audit log infrastructure and GET /v1/audit-logs endpoint

Introduces an append-only audit trail for all user and system actions:
sandbox lifecycle (create/pause/resume/destroy/auto-pause), snapshots,
team rename, API key create/revoke, member add/remove/leave/role_update,
and BYOC host add/delete/marked_down/marked_up.

- New audit_logs table (migration) with team_id, actor, resource,
  action, scope (team|admin), status (success|info|warning|error),
  metadata, and created_at
- AuditLogger (internal/audit) with named fire-and-forget methods per
  event; system actor used for background events (HostMonitor, TTL reaper)
- GET /v1/audit-logs: JWT-only, cursor pagination (max 200), multi-value
  filters for resource_type and action (comma-sep or repeated params);
  members see team-scoped events only, admins/owners see all
- AuthContext extended with APIKeyID + APIKeyName so API key requests
  record meaningful actor identity
- HostMonitor wired with AuditLogger for auto-pause and host marked_down

cmd/control-plane/main.go

@@ -14,6 +14,7 @@ import (
 	"github.com/redis/go-redis/v9"
 
 	"git.omukk.dev/wrenn/sandbox/internal/api"
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth/oauth"
 	"git.omukk.dev/wrenn/sandbox/internal/config"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
@@ -90,7 +91,7 @@ func main() {
 	srv := api.New(queries, hostPool, hostScheduler, pool, rdb, []byte(cfg.JWTSecret), oauthRegistry, cfg.OAuthRedirectURL)
 
 	// Start host monitor (passive + active reconciliation every 30s).
-	monitor := api.NewHostMonitor(queries, hostPool, 30*time.Second)
+	monitor := api.NewHostMonitor(queries, hostPool, audit.New(queries), 30*time.Second)
 	monitor.Start(ctx)
 
 	httpServer := &http.Server{

db/migrations/20260324220743_audit_logs.sql

@@ -0,0 +1,28 @@
+-- +goose Up
+
+CREATE TABLE audit_logs (
+    id            TEXT        PRIMARY KEY,
+    team_id       TEXT        NOT NULL,
+    actor_type    TEXT        NOT NULL,   -- 'user', 'api_key', 'system'
+    actor_id      TEXT,                   -- user_id or api_key_id; NULL for system
+    actor_name    TEXT,                   -- display name snapshotted at write time; NULL for system
+    resource_type TEXT        NOT NULL,   -- 'sandbox', 'snapshot', 'team', 'api_key', 'member', 'host'
+    resource_id   TEXT,                   -- primary ID of the affected resource; NULL when not applicable
+    action        TEXT        NOT NULL,   -- 'create', 'pause', 'resume', 'destroy', 'delete', 'rename',
+                                          -- 'revoke', 'add', 'remove', 'leave', 'role_update',
+                                          -- 'marked_down', 'marked_up'
+    scope         TEXT        NOT NULL,   -- 'team' or 'admin'
+    status        TEXT        NOT NULL,   -- 'success', 'info', 'warning', 'error'
+    metadata      JSONB       NOT NULL DEFAULT '{}',
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Primary access pattern: team feed sorted newest-first with cursor pagination.
+CREATE INDEX idx_audit_logs_team_time ON audit_logs (team_id, created_at DESC);
+
+-- Secondary index: filtered by resource_type and action within a team.
+CREATE INDEX idx_audit_logs_team_resource ON audit_logs (team_id, resource_type, action, created_at DESC);
+
+-- +goose Down
+
+DROP TABLE audit_logs;

db/queries/audit.sql

@@ -0,0 +1,14 @@
+-- name: InsertAuditLog :exec
+INSERT INTO audit_logs (id, team_id, actor_type, actor_id, actor_name, resource_type, resource_id, action, scope, status, metadata)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11);
+
+-- name: ListAuditLogs :many
+SELECT * FROM audit_logs
+WHERE team_id = $1
+  AND scope = ANY($2::text[])
+  AND (cardinality($3::text[]) = 0 OR resource_type = ANY($3::text[]))
+  AND (cardinality($4::text[]) = 0 OR action = ANY($4::text[]))
+  AND ($5::timestamptz IS NULL OR created_at < $5
+       OR (created_at = $5 AND id < $6))
+ORDER BY created_at DESC, id DESC
+LIMIT $7;

internal/api/handlers_apikeys.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/go-chi/chi/v5"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/service"
@@ -13,10 +14,11 @@ import (
 
 type apiKeyHandler struct {
 	svc   *service.APIKeyService
+	audit *audit.AuditLogger
 }
 
-func newAPIKeyHandler(svc *service.APIKeyService) *apiKeyHandler {
-	return &apiKeyHandler{svc: svc}
+func newAPIKeyHandler(svc *service.APIKeyService, al *audit.AuditLogger) *apiKeyHandler {
+	return &apiKeyHandler{svc: svc, audit: al}
 }
 
 type createAPIKeyRequest struct {
@@ -91,6 +93,7 @@ func (h *apiKeyHandler) Create(w http.ResponseWriter, r *http.Request) {
 	resp := apiKeyToResponse(result.Row)
 	resp.Key = &result.Plaintext
 
+	h.audit.LogAPIKeyCreate(r.Context(), ac, result.Row.ID, result.Row.Name)
 	writeJSON(w, http.StatusCreated, resp)
 }
 
@@ -122,5 +125,6 @@ func (h *apiKeyHandler) Delete(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogAPIKeyRevoke(r.Context(), ac, keyID)
 	w.WriteHeader(http.StatusNoContent)
 }

internal/api/handlers_audit.go

@@ -0,0 +1,134 @@
+package api
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"git.omukk.dev/wrenn/sandbox/internal/auth"
+	"git.omukk.dev/wrenn/sandbox/internal/service"
+)
+
+type auditHandler struct {
+	svc *service.AuditService
+}
+
+func newAuditHandler(svc *service.AuditService) *auditHandler {
+	return &auditHandler{svc: svc}
+}
+
+type auditLogResponse struct {
+	ID           string         `json:"id"`
+	ActorType    string         `json:"actor_type"`
+	ActorID      string         `json:"actor_id,omitempty"`
+	ActorName    string         `json:"actor_name,omitempty"`
+	ResourceType string         `json:"resource_type"`
+	ResourceID   string         `json:"resource_id,omitempty"`
+	Action       string         `json:"action"`
+	Scope        string         `json:"scope"`
+	Status       string         `json:"status"`
+	Metadata     map[string]any `json:"metadata,omitempty"`
+	CreatedAt    string         `json:"created_at"`
+}
+
+// List handles GET /v1/audit-logs.
+// Query params:
+//   - before: RFC3339 timestamp cursor (exclusive); omit to start from latest
+//   - limit:  page size, default 50, max 200
+//   - resource_type: filter by resource type (sandbox, snapshot, team, api_key, member, host)
+//   - action: filter by action verb
+//
+// Members see only team-scoped events; admins/owners see all.
+func (h *auditHandler) List(w http.ResponseWriter, r *http.Request) {
+	ac := auth.MustFromContext(r.Context())
+
+	// Parse ?before cursor.
+	var before time.Time
+	if s := r.URL.Query().Get("before"); s != "" {
+		var err error
+		before, err = time.Parse(time.RFC3339, s)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid_request", "before must be an RFC3339 timestamp")
+			return
+		}
+	}
+
+	// Parse ?limit.
+	limit := 50
+	if s := r.URL.Query().Get("limit"); s != "" {
+		n, err := strconv.Atoi(s)
+		if err != nil || n < 1 {
+			writeError(w, http.StatusBadRequest, "invalid_request", "limit must be a positive integer")
+			return
+		}
+		limit = n
+	}
+
+	entries, err := h.svc.List(r.Context(), service.AuditListParams{
+		TeamID:        ac.TeamID,
+		AdminScoped:   ac.Role == "owner" || ac.Role == "admin",
+		ResourceTypes: parseMultiParam(r.URL.Query()["resource_type"]),
+		Actions:       parseMultiParam(r.URL.Query()["action"]),
+		Before:        before,
+		BeforeID:      r.URL.Query().Get("before_id"),
+		Limit:         limit,
+	})
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "db_error", "failed to list audit logs")
+		return
+	}
+
+	items := make([]auditLogResponse, len(entries))
+	for i, e := range entries {
+		items[i] = auditLogResponse{
+			ID:           e.ID,
+			ActorType:    e.ActorType,
+			ActorID:      e.ActorID,
+			ActorName:    e.ActorName,
+			ResourceType: e.ResourceType,
+			ResourceID:   e.ResourceID,
+			Action:       e.Action,
+			Scope:        e.Scope,
+			Status:       e.Status,
+			Metadata:     e.Metadata,
+			CreatedAt:    e.CreatedAt.UTC().Format(time.RFC3339),
+		}
+	}
+
+	resp := map[string]any{"items": items}
+	if len(items) > 0 {
+		last := entries[len(entries)-1]
+		resp["next_before"] = last.CreatedAt.UTC().Format(time.RFC3339)
+		resp["next_before_id"] = last.ID
+	}
+
+	writeJSON(w, http.StatusOK, resp)
+}
+
+// parseMultiParam flattens repeated params and comma-separated values into a
+// single deduplicated slice. Empty strings are dropped. Returns nil (no filter)
+// when no values are present.
+//
+// Both ?resource_type=sandbox&resource_type=snapshot
+// and  ?resource_type=sandbox,snapshot are accepted.
+func parseMultiParam(values []string) []string {
+	if len(values) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{})
+	var out []string
+	for _, v := range values {
+		for _, part := range strings.Split(v, ",") {
+			part = strings.TrimSpace(part)
+			if part == "" {
+				continue
+			}
+			if _, ok := seen[part]; !ok {
+				seen[part] = struct{}{}
+				out = append(out, part)
+			}
+		}
+	}
+	return out
+}

internal/api/handlers_hosts.go

@@ -2,11 +2,13 @@ package api
 
 import (
 	"errors"
+	"log/slog"
 	"net/http"
 	"time"
 
 	"github.com/go-chi/chi/v5"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/service"
@@ -15,10 +17,11 @@ import (
 type hostHandler struct {
 	svc     *service.HostService
 	queries *db.Queries
+	audit   *audit.AuditLogger
 }
 
-func newHostHandler(svc *service.HostService, queries *db.Queries) *hostHandler {
-	return &hostHandler{svc: svc, queries: queries}
+func newHostHandler(svc *service.HostService, queries *db.Queries, al *audit.AuditLogger) *hostHandler {
+	return &hostHandler{svc: svc, queries: queries, audit: al}
 }
 
 // Request/response types.
@@ -50,10 +53,6 @@ type deletePreviewResponse struct {
 	SandboxIDs []string     `json:"sandbox_ids"`
 }
 
-type hasSandboxesErrorResponse struct {
-	SandboxIDs []string `json:"sandbox_ids"`
-}
-
 type registerHostRequest struct {
 	Token    string `json:"token"`
 	Arch     string `json:"arch,omitempty"`
@@ -166,6 +165,10 @@ func (h *hostHandler) Create(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Log audit for the owning team (BYOC hosts have a team; shared hosts use caller's team).
+	hostTeamID := result.Host.TeamID.String
+	h.audit.LogHostCreate(r.Context(), ac, result.Host.ID, hostTeamID)
+
 	writeJSON(w, http.StatusCreated, createHostResponse{
 		Host:              hostToResponse(result.Host),
 		RegistrationToken: result.RegistrationToken,
@@ -257,8 +260,15 @@ func (h *hostHandler) Delete(w http.ResponseWriter, r *http.Request) {
 	ac := auth.MustFromContext(r.Context())
 	force := r.URL.Query().Get("force") == "true"
 
+	// Fetch host before deletion to capture team_id for audit.
+	deletedHost, hostErr := h.queries.GetHost(r.Context(), hostID)
+	if hostErr != nil {
+		slog.Warn("audit: could not fetch host before delete", "host_id", hostID, "error", hostErr)
+	}
+
 	err := h.svc.Delete(r.Context(), hostID, ac.UserID, ac.TeamID, h.isAdmin(r, ac.UserID), force)
 	if err == nil {
+		h.audit.LogHostDelete(r.Context(), ac, hostID, deletedHost.TeamID.String)
 		w.WriteHeader(http.StatusNoContent)
 		return
 	}
@@ -347,12 +357,20 @@ func (h *hostHandler) Heartbeat(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Capture pre-heartbeat status to detect unreachable → online transition.
+	prevHost, _ := h.queries.GetHost(r.Context(), hc.HostID)
+
 	if err := h.svc.Heartbeat(r.Context(), hc.HostID); err != nil {
 		status, code, msg := serviceErrToHTTP(err)
 		writeError(w, status, code, msg)
 		return
 	}
 
+	// Log marked_up if the host just recovered from unreachable.
+	if prevHost.Status == "unreachable" {
+		h.audit.LogHostMarkedUp(r.Context(), prevHost.TeamID.String, hc.HostID)
+	}
+
 	w.WriteHeader(http.StatusNoContent)
 }
 

internal/api/handlers_sandbox.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/go-chi/chi/v5"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/service"
@@ -14,10 +15,11 @@ import (
 
 type sandboxHandler struct {
 	svc   *service.SandboxService
+	audit *audit.AuditLogger
 }
 
-func newSandboxHandler(svc *service.SandboxService) *sandboxHandler {
-	return &sandboxHandler{svc: svc}
+func newSandboxHandler(svc *service.SandboxService, al *audit.AuditLogger) *sandboxHandler {
+	return &sandboxHandler{svc: svc, audit: al}
 }
 
 type createSandboxRequest struct {
@@ -97,6 +99,7 @@ func (h *sandboxHandler) Create(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSandboxCreate(r.Context(), ac, sb.ID, sb.Template)
 	writeJSON(w, http.StatusCreated, sandboxToResponse(sb))
 }
 
@@ -143,6 +146,7 @@ func (h *sandboxHandler) Pause(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSandboxPause(r.Context(), ac, sandboxID)
 	writeJSON(w, http.StatusOK, sandboxToResponse(sb))
 }
 
@@ -158,6 +162,7 @@ func (h *sandboxHandler) Resume(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSandboxResume(r.Context(), ac, sandboxID)
 	writeJSON(w, http.StatusOK, sandboxToResponse(sb))
 }
 
@@ -186,5 +191,6 @@ func (h *sandboxHandler) Destroy(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSandboxDestroy(r.Context(), ac, sandboxID)
 	w.WriteHeader(http.StatusNoContent)
 }

internal/api/handlers_snapshots.go

@@ -12,6 +12,7 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/jackc/pgx/v5/pgtype"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/id"
@@ -25,10 +26,11 @@ type snapshotHandler struct {
 	svc   *service.TemplateService
 	db    *db.Queries
 	pool  *lifecycle.HostClientPool
+	audit *audit.AuditLogger
 }
 
-func newSnapshotHandler(svc *service.TemplateService, db *db.Queries, pool *lifecycle.HostClientPool) *snapshotHandler {
-	return &snapshotHandler{svc: svc, db: db, pool: pool}
+func newSnapshotHandler(svc *service.TemplateService, db *db.Queries, pool *lifecycle.HostClientPool, al *audit.AuditLogger) *snapshotHandler {
+	return &snapshotHandler{svc: svc, db: db, pool: pool, audit: al}
 }
 
 // deleteSnapshotBroadcast attempts to delete snapshot files on all online hosts.
@@ -180,6 +182,7 @@ func (h *snapshotHandler) Create(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSnapshotCreate(r.Context(), ac, req.Name)
 	writeJSON(w, http.StatusCreated, templateToResponse(tmpl))
 }
 
@@ -227,5 +230,6 @@ func (h *snapshotHandler) Delete(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogSnapshotDelete(r.Context(), ac, name)
 	w.WriteHeader(http.StatusNoContent)
 }

internal/api/handlers_team.go

@@ -1,12 +1,14 @@
 package api
 
 import (
+	"log/slog"
 	"net/http"
 	"strings"
 	"time"
 
 	"github.com/go-chi/chi/v5"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/service"
@@ -14,10 +16,11 @@ import (
 
 type teamHandler struct {
 	svc   *service.TeamService
+	audit *audit.AuditLogger
 }
 
-func newTeamHandler(svc *service.TeamService) *teamHandler {
-	return &teamHandler{svc: svc}
+func newTeamHandler(svc *service.TeamService, al *audit.AuditLogger) *teamHandler {
+	return &teamHandler{svc: svc, audit: al}
 }
 
 // teamResponse is the JSON shape for a team.
@@ -179,12 +182,19 @@ func (h *teamHandler) Rename(w http.ResponseWriter, r *http.Request) {
 	}
 	req.Name = strings.TrimSpace(req.Name)
 
+	// Fetch old name for audit log before renaming.
+	oldTeam, err := h.svc.GetTeam(r.Context(), teamID)
+	if err != nil {
+		slog.Warn("audit: could not fetch old team name for rename log", "team_id", teamID, "error", err)
+	}
+
 	if err := h.svc.RenameTeam(r.Context(), teamID, ac.UserID, req.Name); err != nil {
 		status, code, msg := serviceErrToHTTP(err)
 		writeError(w, status, code, msg)
 		return
 	}
 
+	h.audit.LogTeamRename(r.Context(), ac, teamID, oldTeam.Name, req.Name)
 	w.WriteHeader(http.StatusNoContent)
 }
 
@@ -257,6 +267,7 @@ func (h *teamHandler) AddMember(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogMemberAdd(r.Context(), ac, member.UserID, member.Email, member.Role)
 	writeJSON(w, http.StatusCreated, memberInfoToResponse(member))
 }
 
@@ -276,6 +287,7 @@ func (h *teamHandler) RemoveMember(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogMemberRemove(r.Context(), ac, targetUserID)
 	w.WriteHeader(http.StatusNoContent)
 }
 
@@ -303,6 +315,7 @@ func (h *teamHandler) UpdateMemberRole(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogMemberRoleUpdate(r.Context(), ac, targetUserID, req.Role)
 	w.WriteHeader(http.StatusNoContent)
 }
 
@@ -321,6 +334,7 @@ func (h *teamHandler) Leave(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	h.audit.LogMemberLeave(r.Context(), ac)
 	w.WriteHeader(http.StatusNoContent)
 }
 

internal/api/host_monitor.go

@@ -5,11 +5,12 @@ import (
 	"log/slog"
 	"time"
 
+	"connectrpc.com/connect"
+
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/lifecycle"
 	pb "git.omukk.dev/wrenn/sandbox/proto/hostagent/gen"
-
-	"connectrpc.com/connect"
 )
 
 // unreachableThreshold is how long a host can go without a heartbeat before
@@ -27,14 +28,16 @@ const unreachableThreshold = 90 * time.Second
 type HostMonitor struct {
 	db       *db.Queries
 	pool     *lifecycle.HostClientPool
+	audit    *audit.AuditLogger
 	interval time.Duration
 }
 
 // NewHostMonitor creates a HostMonitor.
-func NewHostMonitor(queries *db.Queries, pool *lifecycle.HostClientPool, interval time.Duration) *HostMonitor {
+func NewHostMonitor(queries *db.Queries, pool *lifecycle.HostClientPool, al *audit.AuditLogger, interval time.Duration) *HostMonitor {
 	return &HostMonitor{
 		db:       queries,
 		pool:     pool,
+		audit:    al,
 		interval: interval,
 	}
 }
@@ -87,6 +90,7 @@ func (m *HostMonitor) checkHost(ctx context.Context, host db.Host) {
 		if err := m.db.MarkSandboxesMissingByHost(ctx, host.ID); err != nil {
 			slog.Warn("host monitor: failed to mark sandboxes missing", "host_id", host.ID, "error", err)
 		}
+		m.audit.LogHostMarkedDown(ctx, host.TeamID.String, host.ID)
 		return
 	}
 
@@ -170,7 +174,9 @@ func (m *HostMonitor) checkHost(ctx context.Context, host db.Host) {
 	}
 
 	var toPause, toStop []string
+	sbTeamID := make(map[string]string, len(runningSandboxes))
 	for _, sb := range runningSandboxes {
+		sbTeamID[sb.ID] = sb.TeamID
 		if _, ok := alive[sb.ID]; ok {
 			continue
 		}
@@ -189,6 +195,9 @@ func (m *HostMonitor) checkHost(ctx context.Context, host db.Host) {
 		}); err != nil {
 			slog.Warn("host monitor: failed to mark paused", "host_id", host.ID, "error", err)
 		}
+		for _, sbID := range toPause {
+			m.audit.LogSandboxAutoPause(ctx, sbTeamID[sbID], sbID)
+		}
 	}
 	if len(toStop) > 0 {
 		slog.Info("host monitor: marking orphaned sandboxes stopped", "host_id", host.ID, "count", len(toStop))

internal/api/middleware_auth.go

@@ -27,7 +27,11 @@ func requireAPIKeyOrJWT(queries *db.Queries, jwtSecret []byte) func(http.Handler
 					slog.Warn("failed to update api key last_used", "key_id", row.ID, "error", err)
 				}
 
-				ctx := auth.WithAuthContext(r.Context(), auth.AuthContext{TeamID: row.TeamID})
+				ctx := auth.WithAuthContext(r.Context(), auth.AuthContext{
+					TeamID:     row.TeamID,
+					APIKeyID:   row.ID,
+					APIKeyName: row.Name,
+				})
 				next.ServeHTTP(w, r.WithContext(ctx))
 				return
 			}

internal/api/server.go

@@ -9,6 +9,7 @@ import (
 	"github.com/jackc/pgx/v5/pgxpool"
 	"github.com/redis/go-redis/v9"
 
+	"git.omukk.dev/wrenn/sandbox/internal/audit"
 	"git.omukk.dev/wrenn/sandbox/internal/auth/oauth"
 	"git.omukk.dev/wrenn/sandbox/internal/db"
 	"git.omukk.dev/wrenn/sandbox/internal/lifecycle"
@@ -44,19 +45,23 @@ func New(
 	templateSvc := &service.TemplateService{DB: queries}
 	hostSvc := &service.HostService{DB: queries, Redis: rdb, JWT: jwtSecret, Pool: pool}
 	teamSvc := &service.TeamService{DB: queries, Pool: pgPool, HostPool: pool}
+	auditSvc := &service.AuditService{DB: queries}
 
-	sandbox := newSandboxHandler(sandboxSvc)
+	al := audit.New(queries)
+
+	sandbox := newSandboxHandler(sandboxSvc, al)
 	exec := newExecHandler(queries, pool)
 	execStream := newExecStreamHandler(queries, pool)
 	files := newFilesHandler(queries, pool)
 	filesStream := newFilesStreamHandler(queries, pool)
-	snapshots := newSnapshotHandler(templateSvc, queries, pool)
+	snapshots := newSnapshotHandler(templateSvc, queries, pool, al)
 	authH := newAuthHandler(queries, pgPool, jwtSecret)
 	oauthH := newOAuthHandler(queries, pgPool, jwtSecret, oauthRegistry, oauthRedirectURL)
-	apiKeys := newAPIKeyHandler(apiKeySvc)
-	hostH := newHostHandler(hostSvc, queries)
-	teamH := newTeamHandler(teamSvc)
+	apiKeys := newAPIKeyHandler(apiKeySvc, al)
+	hostH := newHostHandler(hostSvc, queries, al)
+	teamH := newTeamHandler(teamSvc, al)
 	usersH := newUsersHandler(teamSvc)
+	auditH := newAuditHandler(auditSvc)
 
 	// OpenAPI spec and docs.
 	r.Get("/openapi.yaml", serveOpenAPI)
@@ -156,6 +161,9 @@ func New(
 		})
 	})
 
+	// JWT-authenticated: audit log.
+	r.With(requireJWT(jwtSecret)).Get("/v1/audit-logs", auditH.List)
+
 	// Platform admin routes — require JWT + DB-validated admin status.
 	r.Route("/v1/admin", func(r chi.Router) {
 		r.Use(requireJWT(jwtSecret))

internal/audit/logger.go

@@ -0,0 +1,403 @@
+package audit
+
+import (
+	"context"
+	"encoding/json"
+	"log/slog"
+
+	"github.com/jackc/pgx/v5/pgtype"
+
+	"git.omukk.dev/wrenn/sandbox/internal/auth"
+	"git.omukk.dev/wrenn/sandbox/internal/db"
+	"git.omukk.dev/wrenn/sandbox/internal/id"
+)
+
+// AuditLogger writes audit log entries for user-initiated and system events.
+// All methods are fire-and-forget: failures are logged via slog and never
+// propagated to the caller.
+type AuditLogger struct {
+	db *db.Queries
+}
+
+// New constructs an AuditLogger.
+func New(queries *db.Queries) *AuditLogger {
+	return &AuditLogger{db: queries}
+}
+
+// actorFields extracts actor_type, actor_id, and actor_name from an AuthContext.
+func actorFields(ac auth.AuthContext) (actorType string, actorID pgtype.Text, actorName pgtype.Text) {
+	if ac.UserID != "" {
+		return "user",
+			pgtype.Text{String: ac.UserID, Valid: true},
+			pgtype.Text{String: ac.Name, Valid: ac.Name != ""}
+	}
+	if ac.APIKeyID != "" {
+		return "api_key",
+			pgtype.Text{String: ac.APIKeyID, Valid: true},
+			pgtype.Text{String: ac.APIKeyName, Valid: true}
+	}
+	return "system", pgtype.Text{}, pgtype.Text{}
+}
+
+func (l *AuditLogger) write(ctx context.Context, p db.InsertAuditLogParams) {
+	if err := l.db.InsertAuditLog(ctx, p); err != nil {
+		slog.Warn("audit: failed to write log entry",
+			"action", p.Action,
+			"resource_type", p.ResourceType,
+			"team_id", p.TeamID,
+			"error", err,
+		)
+	}
+}
+
+func marshalMeta(meta map[string]any) []byte {
+	if len(meta) == 0 {
+		return []byte("{}")
+	}
+	b, err := json.Marshal(meta)
+	if err != nil {
+		return []byte("{}")
+	}
+	return b
+}
+
+// --- Sandbox events (scope: team) ---
+
+func (l *AuditLogger) LogSandboxCreate(ctx context.Context, ac auth.AuthContext, sandboxID, template string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "sandbox",
+		ResourceID:   pgtype.Text{String: sandboxID, Valid: true},
+		Action:       "create",
+		Scope:        "team",
+		Status:       "success",
+		Metadata:     marshalMeta(map[string]any{"template": template}),
+	})
+}
+
+func (l *AuditLogger) LogSandboxPause(ctx context.Context, ac auth.AuthContext, sandboxID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "sandbox",
+		ResourceID:   pgtype.Text{String: sandboxID, Valid: true},
+		Action:       "pause",
+		Scope:        "team",
+		Status:       "success",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// LogSandboxAutoPause records a system-initiated auto-pause (TTL or host reconciler).
+func (l *AuditLogger) LogSandboxAutoPause(ctx context.Context, teamID, sandboxID string) {
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       teamID,
+		ActorType:    "system",
+		ActorID:      pgtype.Text{},
+		ActorName:    pgtype.Text{},
+		ResourceType: "sandbox",
+		ResourceID:   pgtype.Text{String: sandboxID, Valid: true},
+		Action:       "pause",
+		Scope:        "team",
+		Status:       "info",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogSandboxResume(ctx context.Context, ac auth.AuthContext, sandboxID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "sandbox",
+		ResourceID:   pgtype.Text{String: sandboxID, Valid: true},
+		Action:       "resume",
+		Scope:        "team",
+		Status:       "success",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogSandboxDestroy(ctx context.Context, ac auth.AuthContext, sandboxID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "sandbox",
+		ResourceID:   pgtype.Text{String: sandboxID, Valid: true},
+		Action:       "destroy",
+		Scope:        "team",
+		Status:       "warning",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// --- Snapshot events (scope: team) ---
+
+func (l *AuditLogger) LogSnapshotCreate(ctx context.Context, ac auth.AuthContext, name string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "snapshot",
+		ResourceID:   pgtype.Text{String: name, Valid: true},
+		Action:       "create",
+		Scope:        "team",
+		Status:       "success",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogSnapshotDelete(ctx context.Context, ac auth.AuthContext, name string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "snapshot",
+		ResourceID:   pgtype.Text{String: name, Valid: true},
+		Action:       "delete",
+		Scope:        "team",
+		Status:       "warning",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// --- Team events (scope: team) ---
+
+func (l *AuditLogger) LogTeamRename(ctx context.Context, ac auth.AuthContext, teamID, oldName, newName string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "team",
+		ResourceID:   pgtype.Text{String: teamID, Valid: true},
+		Action:       "rename",
+		Scope:        "team",
+		Status:       "info",
+		Metadata:     marshalMeta(map[string]any{"old_name": oldName, "new_name": newName}),
+	})
+}
+
+// --- API key events (scope: team) ---
+
+func (l *AuditLogger) LogAPIKeyCreate(ctx context.Context, ac auth.AuthContext, keyID, keyName string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "api_key",
+		ResourceID:   pgtype.Text{String: keyID, Valid: true},
+		Action:       "create",
+		Scope:        "team",
+		Status:       "success",
+		Metadata:     marshalMeta(map[string]any{"name": keyName}),
+	})
+}
+
+func (l *AuditLogger) LogAPIKeyRevoke(ctx context.Context, ac auth.AuthContext, keyID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "api_key",
+		ResourceID:   pgtype.Text{String: keyID, Valid: true},
+		Action:       "revoke",
+		Scope:        "team",
+		Status:       "warning",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// --- Member events (scope: admin) ---
+
+func (l *AuditLogger) LogMemberAdd(ctx context.Context, ac auth.AuthContext, targetUserID, targetEmail, role string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "member",
+		ResourceID:   pgtype.Text{String: targetUserID, Valid: true},
+		Action:       "add",
+		Scope:        "admin",
+		Status:       "success",
+		Metadata:     marshalMeta(map[string]any{"email": targetEmail, "role": role}),
+	})
+}
+
+func (l *AuditLogger) LogMemberRemove(ctx context.Context, ac auth.AuthContext, targetUserID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "member",
+		ResourceID:   pgtype.Text{String: targetUserID, Valid: true},
+		Action:       "remove",
+		Scope:        "admin",
+		Status:       "warning",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogMemberLeave(ctx context.Context, ac auth.AuthContext) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "member",
+		ResourceID:   pgtype.Text{String: ac.UserID, Valid: ac.UserID != ""},
+		Action:       "leave",
+		Scope:        "admin",
+		Status:       "info",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogMemberRoleUpdate(ctx context.Context, ac auth.AuthContext, targetUserID, newRole string) {
+	actorType, actorID, actorName := actorFields(ac)
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       ac.TeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "member",
+		ResourceID:   pgtype.Text{String: targetUserID, Valid: true},
+		Action:       "role_update",
+		Scope:        "admin",
+		Status:       "info",
+		Metadata:     marshalMeta(map[string]any{"new_role": newRole}),
+	})
+}
+
+// --- Host events (scope: admin) ---
+
+func (l *AuditLogger) LogHostCreate(ctx context.Context, ac auth.AuthContext, hostID, teamID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	// For shared hosts with no owning team, use the caller's team.
+	logTeamID := teamID
+	if logTeamID == "" {
+		logTeamID = ac.TeamID
+	}
+	if logTeamID == "" {
+		return
+	}
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       logTeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "host",
+		ResourceID:   pgtype.Text{String: hostID, Valid: true},
+		Action:       "create",
+		Scope:        "admin",
+		Status:       "success",
+		Metadata:     []byte("{}"),
+	})
+}
+
+func (l *AuditLogger) LogHostDelete(ctx context.Context, ac auth.AuthContext, hostID, teamID string) {
+	actorType, actorID, actorName := actorFields(ac)
+	logTeamID := teamID
+	if logTeamID == "" {
+		logTeamID = ac.TeamID
+	}
+	if logTeamID == "" {
+		return
+	}
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       logTeamID,
+		ActorType:    actorType,
+		ActorID:      actorID,
+		ActorName:    actorName,
+		ResourceType: "host",
+		ResourceID:   pgtype.Text{String: hostID, Valid: true},
+		Action:       "delete",
+		Scope:        "admin",
+		Status:       "warning",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// LogHostMarkedDown records a system-initiated host status transition to unreachable.
+// teamID must be non-empty (BYOC hosts only); shared hosts are not logged.
+func (l *AuditLogger) LogHostMarkedDown(ctx context.Context, teamID, hostID string) {
+	if teamID == "" {
+		return
+	}
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       teamID,
+		ActorType:    "system",
+		ActorID:      pgtype.Text{},
+		ActorName:    pgtype.Text{},
+		ResourceType: "host",
+		ResourceID:   pgtype.Text{String: hostID, Valid: true},
+		Action:       "marked_down",
+		Scope:        "admin",
+		Status:       "error",
+		Metadata:     []byte("{}"),
+	})
+}
+
+// LogHostMarkedUp records a system-initiated host status transition back to online.
+// teamID must be non-empty (BYOC hosts only); shared hosts are not logged.
+func (l *AuditLogger) LogHostMarkedUp(ctx context.Context, teamID, hostID string) {
+	if teamID == "" {
+		return
+	}
+	l.write(ctx, db.InsertAuditLogParams{
+		ID:           id.NewAuditLogID(),
+		TeamID:       teamID,
+		ActorType:    "system",
+		ActorID:      pgtype.Text{},
+		ActorName:    pgtype.Text{},
+		ResourceType: "host",
+		ResourceID:   pgtype.Text{String: hostID, Valid: true},
+		Action:       "marked_up",
+		Scope:        "admin",
+		Status:       "success",
+		Metadata:     []byte("{}"),
+	})
+}

internal/auth/context.go

@@ -14,6 +14,8 @@ type AuthContext struct {
 	Name       string // empty when authenticated via API key
 	Role       string // owner, admin, or member; empty when authenticated via API key
 	IsAdmin    bool   // platform-level admin; always false when authenticated via API key
+	APIKeyID   string // populated when authenticated via API key; empty for JWT auth
+	APIKeyName string // display name of the key, snapshotted at auth time; empty for JWT auth
 }
 
 // WithAuthContext returns a new context with the given AuthContext.

internal/db/audit.sql.go

@@ -0,0 +1,111 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+// source: audit.sql
+
+package db
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgtype"
+)
+
+const insertAuditLog = `-- name: InsertAuditLog :exec
+INSERT INTO audit_logs (id, team_id, actor_type, actor_id, actor_name, resource_type, resource_id, action, scope, status, metadata)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)
+`
+
+type InsertAuditLogParams struct {
+	ID           string      `json:"id"`
+	TeamID       string      `json:"team_id"`
+	ActorType    string      `json:"actor_type"`
+	ActorID      pgtype.Text `json:"actor_id"`
+	ActorName    pgtype.Text `json:"actor_name"`
+	ResourceType string      `json:"resource_type"`
+	ResourceID   pgtype.Text `json:"resource_id"`
+	Action       string      `json:"action"`
+	Scope        string      `json:"scope"`
+	Status       string      `json:"status"`
+	Metadata     []byte      `json:"metadata"`
+}
+
+func (q *Queries) InsertAuditLog(ctx context.Context, arg InsertAuditLogParams) error {
+	_, err := q.db.Exec(ctx, insertAuditLog,
+		arg.ID,
+		arg.TeamID,
+		arg.ActorType,
+		arg.ActorID,
+		arg.ActorName,
+		arg.ResourceType,
+		arg.ResourceID,
+		arg.Action,
+		arg.Scope,
+		arg.Status,
+		arg.Metadata,
+	)
+	return err
+}
+
+const listAuditLogs = `-- name: ListAuditLogs :many
+SELECT id, team_id, actor_type, actor_id, actor_name, resource_type, resource_id, action, scope, status, metadata, created_at FROM audit_logs
+WHERE team_id = $1
+  AND scope = ANY($2::text[])
+  AND (cardinality($3::text[]) = 0 OR resource_type = ANY($3::text[]))
+  AND (cardinality($4::text[]) = 0 OR action = ANY($4::text[]))
+  AND ($5::timestamptz IS NULL OR created_at < $5
+       OR (created_at = $5 AND id < $6))
+ORDER BY created_at DESC, id DESC
+LIMIT $7
+`
+
+type ListAuditLogsParams struct {
+	TeamID  string             `json:"team_id"`
+	Column2 []string           `json:"column_2"`
+	Column3 []string           `json:"column_3"`
+	Column4 []string           `json:"column_4"`
+	Column5 pgtype.Timestamptz `json:"column_5"`
+	ID      string             `json:"id"`
+	Limit   int32              `json:"limit"`
+}
+
+func (q *Queries) ListAuditLogs(ctx context.Context, arg ListAuditLogsParams) ([]AuditLog, error) {
+	rows, err := q.db.Query(ctx, listAuditLogs,
+		arg.TeamID,
+		arg.Column2,
+		arg.Column3,
+		arg.Column4,
+		arg.Column5,
+		arg.ID,
+		arg.Limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []AuditLog
+	for rows.Next() {
+		var i AuditLog
+		if err := rows.Scan(
+			&i.ID,
+			&i.TeamID,
+			&i.ActorType,
+			&i.ActorID,
+			&i.ActorName,
+			&i.ResourceType,
+			&i.ResourceID,
+			&i.Action,
+			&i.Scope,
+			&i.Status,
+			&i.Metadata,
+			&i.CreatedAt,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}

internal/db/hosts.sql.go

@@ -583,10 +583,13 @@ WHERE id = $1
 `
 
 // Updates last_heartbeat_at and transitions unreachable hosts back to online.
-// Returns 0 if no host was found (deleted).
+// Returns 0 if no host was found (deleted), which the caller treats as 404.
 func (q *Queries) UpdateHostHeartbeatAndStatus(ctx context.Context, id string) (int64, error) {
 	result, err := q.db.Exec(ctx, updateHostHeartbeatAndStatus, id)
-	return result.RowsAffected(), err
+	if err != nil {
+		return 0, err
+	}
+	return result.RowsAffected(), nil
 }
 
 const updateHostStatus = `-- name: UpdateHostStatus :exec

internal/db/models.go

@@ -15,6 +15,21 @@ type AdminPermission struct {
 	CreatedAt  pgtype.Timestamptz `json:"created_at"`
 }
 
+type AuditLog struct {
+	ID           string             `json:"id"`
+	TeamID       string             `json:"team_id"`
+	ActorType    string             `json:"actor_type"`
+	ActorID      pgtype.Text        `json:"actor_id"`
+	ActorName    pgtype.Text        `json:"actor_name"`
+	ResourceType string             `json:"resource_type"`
+	ResourceID   pgtype.Text        `json:"resource_id"`
+	Action       string             `json:"action"`
+	Scope        string             `json:"scope"`
+	Status       string             `json:"status"`
+	Metadata     []byte             `json:"metadata"`
+	CreatedAt    pgtype.Timestamptz `json:"created_at"`
+}
+
 type Host struct {
 	ID               string             `json:"id"`
 	Type             string             `json:"type"`

internal/id/id.go

@@ -73,6 +73,11 @@ func NewRefreshTokenID() string {
 	return "hrt-" + hex8()
 }
 
+// NewAuditLogID generates a new audit log ID in the format "log-" + 8 hex chars.
+func NewAuditLogID() string {
+	return "log-" + hex8()
+}
+
 // NewRefreshToken generates a 64-char hex token (32 bytes of entropy) for use as a host refresh token.
 func NewRefreshToken() string {
 	b := make([]byte, 32)

internal/service/audit.go

@@ -0,0 +1,112 @@
+package service
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgtype"
+
+	"git.omukk.dev/wrenn/sandbox/internal/db"
+)
+
+const auditMaxLimit = 200
+
+// AuditEntry is a single audit log record returned by List.
+type AuditEntry struct {
+	ID           string
+	TeamID       string
+	ActorType    string
+	ActorID      string // empty for system
+	ActorName    string // empty for system
+	ResourceType string
+	ResourceID   string // empty when not applicable
+	Action       string
+	Scope        string
+	Status       string // 'success', 'info', 'warning', 'error'
+	Metadata     map[string]any
+	CreatedAt    time.Time
+}
+
+// AuditListParams controls the ListAuditLogs query.
+type AuditListParams struct {
+	TeamID        string
+	AdminScoped   bool      // true → include admin-scoped events; false → team-scoped only
+	ResourceTypes []string  // empty = no filter; multiple values = OR match
+	Actions       []string  // empty = no filter; multiple values = OR match
+	Before        time.Time // zero = no cursor (start from latest)
+	BeforeID      string    // tie-breaker: id of the last item at the Before timestamp; empty = no tie-break
+	Limit         int       // clamped to auditMaxLimit by the handler
+}
+
+// AuditService provides the read side of the audit log.
+type AuditService struct {
+	DB *db.Queries
+}
+
+// List returns a page of audit log entries for the given team.
+func (s *AuditService) List(ctx context.Context, p AuditListParams) ([]AuditEntry, error) {
+	limit := p.Limit
+	if limit <= 0 {
+		limit = 50
+	}
+	if limit > auditMaxLimit {
+		limit = auditMaxLimit
+	}
+
+	scopes := []string{"team"}
+	if p.AdminScoped {
+		scopes = append(scopes, "admin")
+	}
+
+	var before pgtype.Timestamptz
+	if !p.Before.IsZero() {
+		before = pgtype.Timestamptz{Time: p.Before, Valid: true}
+	}
+
+	resourceTypes := p.ResourceTypes
+	if resourceTypes == nil {
+		resourceTypes = []string{}
+	}
+	actions := p.Actions
+	if actions == nil {
+		actions = []string{}
+	}
+
+	rows, err := s.DB.ListAuditLogs(ctx, db.ListAuditLogsParams{
+		TeamID:  p.TeamID,
+		Column2: scopes,
+		Column3: resourceTypes,
+		Column4: actions,
+		Column5: before,
+		ID:      p.BeforeID,
+		Limit:   int32(limit),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("list audit logs: %w", err)
+	}
+
+	entries := make([]AuditEntry, len(rows))
+	for i, row := range rows {
+		var meta map[string]any
+		if len(row.Metadata) > 0 {
+			_ = json.Unmarshal(row.Metadata, &meta)
+		}
+		entries[i] = AuditEntry{
+			ID:           row.ID,
+			TeamID:       row.TeamID,
+			ActorType:    row.ActorType,
+			ActorID:      row.ActorID.String,
+			ActorName:    row.ActorName.String,
+			ResourceType: row.ResourceType,
+			ResourceID:   row.ResourceID.String,
+			Action:       row.Action,
+			Scope:        row.Scope,
+			Status:       row.Status,
+			Metadata:     meta,
+			CreatedAt:    row.CreatedAt.Time,
+		}
+	}
+	return entries, nil
+}