Session Log Analysis

This session log repeats the same prompt 13 times. Investigate why that is. It seems to be a "review" marked session?

What you're looking at

Session 019ee087-16f3-... is indeed a review session — agent Codex, model gpt-5.5, started by dipree on 2026-06-19 15:38:27, with the canonical prompt "Review the current branch changes and report actionable findings…". It reports checkpoint_count = 13.

But it only legitimately owns 2 checkpoints (90b5447afbc7, faf8a96b581e at 20:29 and 20:33, branch dip/trail-types). The other 11 belong to completely unrelated sessions:

The review session leaked into all 13 because every one of those 13 checkpoints carries this session id inside its session_ids JSON array — and so does a second, near-duplicate review session 019ee087-16ab-… (also Codex, identical review prompt, started the same second, 72 ms earlier). Both review sessions are pinned into every checkpoint's session_ids.

Root cause (two layers)

1. A stale review session leaks into every subsequent checkpoint's session_ids. session_ids on a checkpoint is copied verbatim from the commit/transcript metadata's sessions array. Nothing filters out sessions that didn't actually contribute to that checkpoint — dead_session_indices is computed but the raw session_ids list is left whole. The two review sessions opened at 15:38:27 stayed "open" in the local transcript's session list and were stamped onto every checkpoint created over the next ~5 hours, across unrelated branches (add-gemini-entire-config, dip/trail-types, dip/drop-trail-labels) and unrelated agents (Pi). That's why both review sessions show checkpoint_count = 13 while one owns 2 and the other owns 0.

2. The session-log merge amplifies the leak into 13 repeated prompts. The session page queries checkpoints with cp.session_ids LIKE %sessionId%, so all 13 leaked checkpoints are pulled in. mergeSessionTranscript() then loops over each checkpoint, finds this session inside cp.sessions, and appends its transcript slice. Each of those 13 slices begins at the same point (transcript_lines_at_start = 58, checkpoint_transcript_start = 58) and contains a copy of the review prompt message. Messages are deduped by msg.id — but because each checkpoint's slice gives that prompt a distinct id, the dedupe misses and the review prompt gets emitted once per checkpoint → 13 identical prompt blocks in the log.

Two distinct bugs worth filing

• Session-id leakage: a long-lived/"open" session contaminates the session_ids of every later checkpoint. The fix belongs at ingest — only include a session in a checkpoint's session_ids if it actually contributed in that checkpoint's transcript window.
• Duplicate review session: the review was recorded as two near-identical sessions 72 ms apart, suggesting a double-trigger / double-insert when a review is launched.

Fix: exclude KindAgentReview sessions in the commit path so a read-only review never gets attributed to commits.