name: add-gcal-tool

description: Add Google Calendar as an MCP tool (list calendars, list/search/create events, free/busy queries) using OneCLI-managed OAuth. Multi-calendar and multi-account supported. Mirrors /add-gmail-tool's stub pattern — no raw credentials ever reach the container; OneCLI injects real tokens at request time.

Add Google Calendar Tool (OneCLI-native)

This skill wires [@cocal/google-calendar-mcp](https://github.com/cocal-com/google-calendar-mcp) into selected agent groups. The MCP server reads stub credentials containing the onecli-managed placeholder; the OneCLI gateway intercepts outbound calls to calendar.googleapis.com / oauth2.googleapis.com and swaps the bearer for the real OAuth token from its vault.

Why this package (and not gongrzhe's): @gongrzhe/server-calendar-autoauth-mcp only supports the primary calendar and exposes 5 tools (no list_calendars). @cocal/google-calendar-mcp explicitly supports multi-calendar and multi-account, and is actively maintained.

Tools exposed (surfaced as mcp__calendar__<name>, exact set depends on version — run tools/list against the MCP server to enumerate): list-calendars, list-events, search-events, create-event, update-event, delete-event, get-event, list-colors, get-freebusy, get-current-time, plus multi-account management tools.

Why this pattern: v2's invariant is that containers never receive raw API keys (CHANGELOG 2.0.0). Same stub pattern /add-gmail-tool uses. This skill is deliberately a sibling, not a combined "Google Workspace" skill — installs independently and removes cleanly.

Phase 1: Pre-flight

Verify OneCLI has Google Calendar connected

onecli apps get --provider google-calendar

Expected: "connection": { "status": "connected" } with scopes including calendar.readonly and calendar.events.

If not connected, tell the user:

Open the OneCLI web UI at http://127.0.0.1:10254, go to Apps → Google Calendar, and click Connect. Sign in with the Google account the agent should act as. calendar.readonly + calendar.events are the minimum useful scopes.

Verify stub credentials exist

The stub lives at ~/.calendar-mcp/ by convention (shared with /add-gmail-tool's sibling). cocal doesn't default to this path (it uses ~/.config/google-calendar-mcp/tokens.json) — we override via env vars below so it reads our stubs instead.

ls -la ~/.calendar-mcp/gcp-oauth.keys.json ~/.calendar-mcp/credentials.json 2>&1

If both exist with onecli-managed:

grep -l onecli-managed ~/.calendar-mcp/gcp-oauth.keys.json ~/.calendar-mcp/credentials.json

...skip to Phase 2. If either file has real credentials (no onecli-managed), STOP — back up and delete before proceeding.

If absent, write them:

mkdir -p ~/.calendar-mcp
cat > ~/.calendar-mcp/gcp-oauth.keys.json <<'EOF'
{
  "installed": {
    "client_id": "onecli-managed.apps.googleusercontent.com",
    "client_secret": "onecli-managed",
    "redirect_uris": ["http://localhost:3000/oauth2callback"]
  }
}
EOF
cat > ~/.calendar-mcp/credentials.json <<'EOF'
{
  "access_token": "onecli-managed",
  "refresh_token": "onecli-managed",
  "token_type": "Bearer",
  "expiry_date": 99999999999999,
  "scope": "https://www.googleapis.com/auth/calendar.readonly https://www.googleapis.com/auth/calendar.events"
}
EOF
chmod 600 ~/.calendar-mcp/*.json

Verify mount allowlist covers the path

cat ~/.config/nanoclaw/mount-allowlist.json

~/.calendar-mcp must sit under an allowedRoots entry.

Check agent secret-mode

For each target agent group, confirm OneCLI will inject the Google Calendar token:

onecli agents list

secretMode: all is sufficient. If selective, explicitly assign the Calendar secret.

Phase 2: Apply Code Changes

Check if already applied

grep -q 'CALENDAR_MCP_VERSION' container/Dockerfile && \
echo "ALREADY APPLIED — skip to Phase 3"

Add MCP server to Dockerfile

Edit container/Dockerfile. Find the pinned-version ARG block and add:

ARG CALENDAR_MCP_VERSION=2.6.1

If /add-gmail-tool has already been applied, the pnpm global-install block already exists with its zod-to-json-schema@3.22.5 pin. Just append the calendar package — **the calendar-mcp uses zod@4.x and does NOT need that pin**, but it's harmless to share the block:

RUN --mount=type=cache,target=/root/.cache/pnpm \
    pnpm install -g \
        "@gongrzhe/server-gmail-autoauth-mcp@${GMAIL_MCP_VERSION}" \
        "@cocal/google-calendar-mcp@${CALENDAR_MCP_VERSION}" \
        "zod-to-json-schema@3.22.5"

If /add-gmail-tool hasn't been applied, install Calendar standalone:

RUN --mount=type=cache,target=/root/.cache/pnpm \
    pnpm install -g "@cocal/google-calendar-mcp@${CALENDAR_MCP_VERSION}"

container/agent-runner/src/providers/claude.ts derives the allow-pattern dynamically from eac