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35 people reported

All time, since Oct 1, including 32 thumbs-up on GitHub.

Idle auto-compaction

“Since 2.1.286, idle sessions are compacted automatically before the prompt cache expires ("Compacted while idle, before the prompt cache expired").”

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I hit this bug: rapsheet.dev/sheets/claude-code/issues/11640/file
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Quiet. No reports and thumbs-up in the last two weeks, down from 15 a week at the early-October peak.

Sessions auto-compact while idle far below context limit. Shows as "Compacted while idle, before the prompt cache expired"; no opt-out or warning, and working context is replaced by a summary.

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Where
Context compaction
Error text
Compacted while idle, before the prompt cache expired
Versions
2.1.286 to 2.1.296
Platforms
macOS
How bad
Breaks a normal workflow. Some reports say it used to work.

Part of: Auto-compaction loses session context6 bugs

  1. Auto-compaction loses session context6 people
  2. Autocompact thrashing ends session3 people
  3. Auto-compaction fires early3 people
  4. Idle after compaction2 people
  5. Opus 4.6 context capped at 200K12 people

Original reports3, newest first

  1. Auto-compact runs while idle after prompt cache expires, forcing manual session restarts#102332
  2. Auto-compact triggers early at ~89% context remaining#101209
  3. 2.1.286 idle compaction silently discards working context in long-running sessions; no opt-out, logged as "manual"#98747

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