token.json is sealed with AES-256-GCM (key derived from the OAuth client secret,
bound to the chat), so the agent's processes can read the file but not the
refresh token. Plain files, including VolcanicSecretary's refresh_token format,
are rewritten sealed on first read.
The scheduler gains IScriptEnvironment: extra per-run variables set after the
process environment filter and redacted from the run's output. The Telegram
host uses it to pass GOOGLE_ACCESS_TOKEN, refreshed to cover the job's timeout;
the refresh token and client secret never reach the script.
Tokens now live in <cwd>/.volcanic/google-calendar/token.json, as in the
VolcanicSecretary reference, instead of <agentDir>/google-calendar/<chat
key>/. GoogleCalendarOptions.TokenDirectory, when set, keeps the old
per-chat layout under that root. Spec, docs and CLAUDE.md updated.
- log an unknown stored zone once even when the tool description reads it first
- serialise the flow's token write with /calendar_disconnect under the flow gate
- a cancelled or expired pending flow is cleared, not re-sent or shown
- chat keys anchor with \z so a trailing newline is hashed
- a timeMax date includes that whole day (spec updated)
- dispose the flow's CancellationTokenSource, drop ConnectFlow.Token, Begin is a plain write
- GoogleCalendarOptions.IsConfigured replaces the host's copy of the rule; StoredToken is internal
- test BotSetupService's menu through DI, tokens absent from tool results
- Telegram.Tests csproj reference placed as in telegram-message-context; ChatHost passes calendar by name
- docs: per-event timeZone, both config sources for /calendar_*
Spec §3: DeviceAuthorization/PollStatus shapes, Success carries the access token, 5xx without error is a transport error, RefreshAsync returns AccessToken, RevokeAsync returns the failure reason (null on success).
Adds the GoogleCalendar extension project (Abstractions only, Private=false), GoogleCalendarOptions with
env fallbacks and a secret-free ToString, GoogleCalendarException/Messages, ChatKeys (scope -> safe directory
name), StoredToken and GoogleTokenStore (atomic write, owner-only on Unix, reads never throw), and an empty
GoogleCalendarConnections stub for Task 3. The test project gains the extension reference and
Microsoft.Extensions.TimeProvider.Testing 10.9.0.
