* fix: graceful session shutdown — close stdin before signals
The old Close() called context.Cancel() which sends SIGKILL immediately
via Go's exec.CommandContext, giving Claude Code zero time to run Stop
hooks. This broke claude-mem session summaries (120s timeout) and any
other cleanup that depends on a clean exit.
New three-phase shutdown:
1. Close stdin (EOF) — Claude Code exits cleanly, running Stop hooks
2. SIGTERM after 30s grace period if still alive
3. SIGKILL after 5s more as last resort
Also increases engine-level close timeout from 10s to 45s to accommodate
the longer graceful window.
Tested: all agent/claudecode and core tests pass. Verified Claude Code
exits cleanly on stdin EOF (exit code 0).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: 120s graceful close + hold message during session transition
Increases the default graceful stop timeout from 30s to 120s to match
claude-mem's Stop hook timeout. The wait ends as soon as the process
exits — typical shutdowns take seconds, not the full 120s.
When a user messages during an idle-reset that triggers a graceful
close, they now see "Wrapping up your previous session (usually a few
seconds, up to 2 minutes). Your new session will start automatically."
instead of a silent delay. The hold message is sent before the blocking
close, and the new session starts immediately when the old one finishes.
Engine-level close timeout raised to 130s (120s grace + 5s SIGTERM +
5s buffer).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
