fix: don't wait for sessions that are older then 120s

[Soph]

Added a stale file check at the top of waitForTranscriptFlush: if the transcript file's mtime is older than 2 minutes, skip the poll loop entirely. The agent clearly isn't running, so the sentinel will never appear.

Files changed:

• cmd/entire/cli/agent/claudecode/lifecycle.go — stale mtime check
• cmd/entire/cli/agent/claudecode/lifecycle_test.go — tests for stale, recent, and nonexistent files

Not fixed (potential follow-ups)

• The stale active session is still processed on every commit (condensation, carry-forward) — just no longer blocks for 12s
• No automatic expiry of stale "active" sessions (would need staleness detection to transition them to IDLE)
• The 9.1MB transcript is still read/parsed on every commit for content detection

[cursor]

PR Summary

Low Risk
Low risk behavioral change limited to transcript-flush waiting; the main risk is prematurely skipping the sentinel wait if a transcript appears stale despite an active agent.

Overview
Avoids blocking on transcript flush for stale Claude Code sessions by adding a fast-path staleness check in waitForTranscriptFlush: if the transcript file’s mtime is older than 2 minutes, it skips the 3s polling loop and logs a debug message.

Adds unit tests covering stale files (returns quickly), recent files (still waits ~3s without a sentinel), and nonexistent files (completes without hanging).

^{Written by Cursor Bugbot for commit a009258. Configure here.}

[Copilot]

Pull request overview

This pull request optimizes the transcript flush waiting mechanism in Claude Code agent lifecycle management by adding a fast-path check for stale transcript files. The change prevents unnecessary 3-second polling loops when waiting for transcripts that haven't been modified in over 2 minutes, which indicates the agent is no longer running.

Changes:

• Added stale file detection (2-minute threshold) to skip polling when agent clearly isn't active
• Added comprehensive test coverage for stale, recent, and nonexistent file scenarios
• Maintains existing timeout behavior for recently-modified files

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
cmd/entire/cli/agent/claudecode/lifecycle.go	Implements stale file check using os.Stat and ModTime() comparison before entering the poll loop
cmd/entire/cli/agent/claudecode/lifecycle_test.go	Adds three test cases covering stale (10min old), recent (just created), and nonexistent file scenarios with timing assertions