mac: add signing helper and document debug bundle

docs/mac/signing.md

@@ -4,13 +4,15 @@ This app is usually built from `scripts/package-mac-app.sh`, which now:
 
 - sets a stable debug bundle identifier: `com.steipete.clawdis.debug`
 - writes the Info.plist with that bundle id (override via `BUNDLE_ID=...`)
-- ad‑hoc signs the main binary, the bundled CLI, and the app bundle so macOS treats each rebuild as the same signed bundle and keeps TCC permissions (notifications, accessibility, screen recording, mic, speech)
+- calls `scripts/codesign-mac-app.sh` to sign the main binary, bundled CLI, and app bundle so macOS treats each rebuild as the same signed bundle and keeps TCC permissions (notifications, accessibility, screen recording, mic, speech). Defaults to ad‑hoc; set `SIGN_IDENTITY="Developer ID Application: …"` to use a real cert.
+- injects build metadata into Info.plist: `ClawdisBuildTimestamp` (UTC) and `ClawdisGitCommit` (short hash) so the About pane can show build, git, and debug/release channel.
 
 ## Usage
 
 ```bash
 # from repo root
-scripts/package-mac-app.sh
+scripts/package-mac-app.sh               # ad-hoc signing
+SIGN_IDENTITY="Developer ID Application: Your Name" scripts/package-mac-app.sh   # real cert
 ```
 
 If you need a different bundle id (e.g. release build):
@@ -19,6 +21,14 @@ If you need a different bundle id (e.g. release build):
 BUNDLE_ID=com.steipete.clawdis scripts/package-mac-app.sh
 ```
 
+## Build metadata for About
+
+`package-mac-app.sh` stamps the bundle with:
+- `ClawdisBuildTimestamp`: ISO8601 UTC at package time
+- `ClawdisGitCommit`: short git hash (or `unknown` if unavailable)
+
+The About tab reads these keys to show version, build date, git commit, and whether it’s a debug build (via `#if DEBUG`). Run the packager to refresh these values after code changes.
+
 ## Why
 
-TCC permissions are tied to the bundle identifier *and* code signature. Unsigned debug builds with changing UUIDs were causing macOS to forget grants after each rebuild. Ad‑hoc signing the binaries and keeping a fixed bundle id/path (`dist/Clawdis.app`) preserves the grants between builds, matching the VibeTunnel approach.
+TCC permissions are tied to the bundle identifier *and* code signature. Unsigned debug builds with changing UUIDs were causing macOS to forget grants after each rebuild. Signing the binaries (ad‑hoc by default) and keeping a fixed bundle id/path (`dist/Clawdis.app`) preserves the grants between builds, matching the VibeTunnel approach.

scripts/codesign-mac-app.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+APP_BUNDLE="${1:-dist/Clawdis.app}"
+IDENTITY="${SIGN_IDENTITY:--}"
+ENT_TMP=$(mktemp /tmp/clawdis-entitlements.XXXXXX.plist)
+
+if [ ! -d "$APP_BUNDLE" ]; then
+  echo "App bundle not found: $APP_BUNDLE" >&2
+  exit 1
+fi
+
+echo "Using signing identity: $IDENTITY"
+
+cat > "$ENT_TMP" <<'PLIST'
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.security.hardened-runtime</key>
+    <true/>
+    <key>com.apple.security.automation.apple-events</key>
+    <true/>
+</dict>
+</plist>
+PLIST
+
+# clear extended attributes to avoid stale signatures
+xattr -cr "$APP_BUNDLE" 2>/dev/null || true
+
+sign_item() {
+  local target="$1"
+  codesign --force --options runtime --timestamp=none --entitlements "$ENT_TMP" --sign "$IDENTITY" "$target"
+}
+
+# Sign main binary and CLI helper if present
+if [ -f "$APP_BUNDLE/Contents/MacOS/Clawdis" ]; then
+  echo "Signing main binary"; sign_item "$APP_BUNDLE/Contents/MacOS/Clawdis"
+fi
+if [ -f "$APP_BUNDLE/Contents/MacOS/ClawdisCLI" ]; then
+  echo "Signing CLI helper"; sign_item "$APP_BUNDLE/Contents/MacOS/ClawdisCLI"
+fi
+
+# Sign any embedded frameworks/dylibs if they ever appear
+if [ -d "$APP_BUNDLE/Contents/Frameworks" ]; then
+  find "$APP_BUNDLE/Contents/Frameworks" \( -name "*.framework" -o -name "*.dylib" \) -print0 | while IFS= read -r -d '' f; do
+    echo "Signing framework: $f"; sign_item "$f"
+  done
+fi
+
+# Finally sign the bundle
+sign_item "$APP_BUNDLE"
+
+rm -f "$ENT_TMP"
+echo "Codesign complete for $APP_BUNDLE"

scripts/package-mac-app.sh

@@ -8,7 +8,9 @@ ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
 APP_ROOT="$ROOT_DIR/dist/Clawdis.app"
 BUILD_PATH="$ROOT_DIR/apps/macos/.build"
 PRODUCT="Clawdis"
-BUNDLE_ID="com.steipete.clawdis.debug"
+BUNDLE_ID="${BUNDLE_ID:-com.steipete.clawdis.debug}"
+BUILD_TS=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+GIT_COMMIT=$(cd "$ROOT_DIR" && git rev-parse --short HEAD 2>/dev/null || echo "unknown")
 
 cd "$ROOT_DIR/apps/macos"
 
@@ -42,6 +44,10 @@ cat > "$APP_ROOT/Contents/Info.plist" <<PLIST
     <string>15.0</string>
     <key>LSUIElement</key>
     <true/>
+    <key>ClawdisBuildTimestamp</key>
+    <string>${BUILD_TS}</string>
+    <key>ClawdisGitCommit</key>
+    <string>${GIT_COMMIT}</string>
     <key>NSUserNotificationUsageDescription</key>
     <string>Clawdis needs notification permission to show alerts for agent actions.</string>
     <key>NSScreenCaptureDescription</key>
@@ -70,12 +76,8 @@ fi
 echo "⏹  Stopping any running Clawdis"
 killall -q Clawdis 2>/dev/null || true
 
-echo "🔏 Ad-hoc signing binaries for stable TCC permissions"
-codesign --force --options runtime --timestamp=none --sign - "$APP_ROOT/Contents/MacOS/Clawdis"
-if [ -f "$APP_ROOT/Contents/MacOS/ClawdisCLI" ]; then
-  codesign --force --options runtime --timestamp=none --sign - "$APP_ROOT/Contents/MacOS/ClawdisCLI"
-fi
-codesign --force --options runtime --timestamp=none --sign - "$APP_ROOT"
+echo "🔏 Signing bundle (ad-hoc by default; set SIGN_IDENTITY for real cert)"
+SIGN_IDENTITY="${SIGN_IDENTITY:--}" "$ROOT_DIR/scripts/codesign-mac-app.sh" "$APP_ROOT"
 
 echo "✅ Bundle ready at $APP_ROOT"