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+---
+summary: "Bundled bun gateway: packaging, launchd, signing, and bytecode"
+read_when:
+  - Packaging Clawdis.app
+  - Debugging the bundled gateway binary
+  - Changing bun build flags or codesigning
+---
+
+# Bundled bun Gateway (macOS)
+
+Goal: ship **Clawdis.app** with a self-contained Gateway binary. No global `npm install -g clawdis`, no system Node requirement.
+
+## What gets bundled
+
+App bundle layout:
+
+- `Clawdis.app/Contents/Resources/Relay/clawdis-gateway`
+  - bun `--compile` executable built from `dist/macos/gateway-daemon.js`
+- `Clawdis.app/Contents/Resources/Relay/package.json`
+  - tiny “Pi compatibility” file (see below)
+- `Clawdis.app/Contents/Resources/Relay/theme/`
+  - Pi TUI theme payload (optional, but strongly recommended)
+
+Why the sidecar files matter:
+- `@mariozechner/pi-coding-agent` detects “bun binary mode” and then looks for `package.json` + `theme/` **next to `process.execPath`** (i.e. next to `clawdis-gateway`).
+- So even if bun can embed assets, Pi currently expects filesystem paths. Keep the sidecar files.
+
+## Build pipeline
+
+Packaging script:
+- `scripts/package-mac-app.sh`
+
+It builds:
+- TS: `pnpm exec tsc`
+- Swift app + helper: `swift build …`
+- bun gateway: `bun build dist/macos/gateway-daemon.js --compile --bytecode …`
+
+Important bundler flags:
+- `--compile`: produces a standalone executable
+- `--bytecode`: reduces startup time / parsing overhead (works here)
+- externals:
+  - `-e playwright-core -e electron -e "chromium-bidi*"`
+  - Reason: keep heavy/optional browser-control deps out of the embedded daemon path
+
+Version injection:
+- `--define "__CLAWDIS_VERSION__=\"<pkg version>\""`
+- `src/version.ts` also supports `__CLAWDIS_VERSION__` (and `CLAWDIS_BUNDLED_VERSION`) so `--version` doesn’t depend on reading `package.json` at runtime.
+
+## Launchd (Gateway as LaunchAgent)
+
+Label:
+- `com.steipete.clawdis.gateway`
+
+Plist location (per-user):
+- `~/Library/LaunchAgents/com.steipete.clawdis.gateway.plist`
+
+Manager:
+- `apps/macos/Sources/Clawdis/GatewayLaunchAgentManager.swift`
+
+Behavior:
+- “Clawdis Active” enables/disables the LaunchAgent.
+- App quit does **not** stop the gateway (launchd keeps it alive).
+
+Logging:
+- launchd stdout/err: `/tmp/clawdis/clawdis-gateway.log`
+
+Default LaunchAgent env:
+- `CLAWDIS_SKIP_BROWSER_CONTROL_SERVER=1`
+- `CLAWDIS_IMAGE_BACKEND=sips` (avoid sharp native addon under bun)
+
+## Codesigning (hardened runtime + bun)
+
+Symptom (when mis-signed):
+- `Ran out of executable memory …` on launch
+
+Fix:
+- The bun executable needs JIT-ish permissions under hardened runtime.
+- `scripts/codesign-mac-app.sh` signs `Relay/clawdis-gateway` with:
+  - `com.apple.security.cs.allow-jit`
+  - `com.apple.security.cs.allow-unsigned-executable-memory`
+
+## Image processing under bun
+
+Problem:
+- bun can’t load some native Node addons like `sharp` (and we don’t want to ship native addon trees for the gateway).
+
+Solution:
+- Central helper `src/media/image-ops.ts`
+  - Prefers `/usr/bin/sips` on macOS (esp. when running under bun)
+  - Falls back to `sharp` when available (Node/dev)
+- Used by:
+  - `src/web/media.ts` (optimize inbound/outbound images)
+  - `src/browser/screenshot.ts`
+  - `src/agents/pi-tools.ts` (image sanitization)
+
+## Browser control server (optional)
+
+Browser control pulls in Playwright/Electron baggage. For the embedded gateway:
+- `src/gateway/server.ts` starts browser control via lazy dynamic import.
+- Embedded mode sets `CLAWDIS_SKIP_BROWSER_CONTROL_SERVER=1` so it never imports that module.
+
+Override (dev only):
+- set `CLAWDIS_BROWSER_CONTROL_MODULE` to force-load the module path.
+
+## Tests / smoke checks
+
+From a packaged app (local build):
+
+```bash
+dist/Clawdis.app/Contents/Resources/Relay/clawdis-gateway --version
+
+CLAWDIS_SKIP_PROVIDERS=1 \
+CLAWDIS_SKIP_BROWSER_CONTROL_SERVER=1 \
+CLAWDIS_SKIP_CANVAS_HOST=1 \
+dist/Clawdis.app/Contents/Resources/Relay/clawdis-gateway --port 18999 --bind loopback
+```
+
+Then, in another shell:
+
+```bash
+pnpm -s clawdis gateway call health --url ws://127.0.0.1:18999 --timeout 3000
+```
+
+## Repo hygiene
+
+Bun may leave dotfiles like `*.bun-build` in the repo root or subfolders.
+- These are ignored via `.gitignore` (`*.bun-build`).
+