Back to Signal Feed
CodeTracked since May 22, 2026

Rollback now safely truncates session history before resume

This change adds a corrected `/rollback` (`/undo`) flow in cc-connect that truncates the session JSONL by the requested number of turns and restarts the same session with `--resume`, replacing the previous behavior where truncation could be overwritten by a still-running agent.

cc-connectrollbackundoJSONL

What Happened

  • This change adds a corrected `/rollback` (`/undo`) flow in cc-connect that truncates the session JSONL by the requested number of turns and restarts the same session with `--resume`, replacing the previous behavior where truncation could be overwritten by a still-running agent.
  • This change adds a corrected `/rollback` (`/undo`) flow in cc-connect that truncates the session JSONL by the requested number of turns and restarts the same session with `--resume`, replacing the previous behavior where truncation could be overwritten by a still-running agent.
  • 1 evidence item attached for review.

What is Different

Before

Scattered source updates, isolated context, and manual follow-up across multiple feeds.

Now

Implemented a concrete rollback persistence fix by ordering operations as stop-then-truncate-then-resume: the active agent is terminated before `TruncateSessionHistory` rewrites JSONL, and the session is restarted with `--resume` under the same session ID, making in-place context undo reliable.

Why Track This

Why It Matters

For operators and developers who use cc-connect sessions, a mistaken turn can be removed and re-run without corrupting or recreating the session, so recovery during long conversational workflows is faster and less disruptive. The implementation now prevents overwrite races by stopping the agent before truncation and then resuming with reduced context; watch for rollback-triggered races with concurrent writes and whether resume integrity holds when truncation happens near high message throughput.

Impact

For operators and developers who use cc-connect sessions, a mistaken turn can be removed and re-run without corrupting or recreating the session, so recovery during long conversational workflows is faster and less disruptive. The implementation now prevents overwrite races by stopping the agent before truncation and then resuming with reduced context; watch for rollback-triggered races with concurrent writes and whether resume integrity holds when truncation happens near high message throughput.

What To Watch Next

  • Watch whether cc-connect becomes a repeated pattern.
  • Track follow-up changes around AI Integration in IDEs.
  • Compare future signals against this evidence trail.
  • Re-check risk flags: jsonl_truncation_race, agent_restart_failure.
Open Topic TimelineOpen Technical EventOpen Original Sourcejsonl_truncation_race / agent_restart_failure / concurrent_message_write / resume_context_mismatch

Supporting Evidence

GITHUB PULL REQUESTHigh Trust

chenhg5/cc-connect PR #1061: feat: native session-name-sync, /fork, /rollback + daemon restart fixes

`/rollback` now stops the agent before truncating JSONL, then resumes the existing session from the shortened history.