fix: recover from corrupt session when previous_message_id is invalid#32
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When a claude -p run is interrupted before an assistant response is written, the stored session JSONL ends on a user-turn entry (UUID format). On the next --resume, Claude Code passes that UUID as diagnostics.previous_message_id, which the API rejects with a 400 because it must start with msg_. Detect this specific error in the background goroutine, drop the stored session_id so the retry runs without --resume, and register the pattern in DetectRetryableError so the message is automatically retried. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
claude -prun is interrupted before an assistant response is written, the session JSONL ends on a user-turn entry (UUID format likead38b534-...)--resume, Claude Code passes that UUID asdiagnostics.previous_message_id, which the API rejects with400: must be the 'id' from a prior /v1/messages response (starts with 'msg_')session_idfile, and log a warning — so the next retry runs without--resumeand creates a fresh sessiondiagnostics.previous_message_idinDetectRetryableErrorso the message is automatically retriedTest plan
claude -pprocess mid-response, then verify the next message starts a fresh session (no--resume) rather than failing again🤖 Generated with Claude Code