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Claude Code Autonomous Loop Instructions

·2026.05.07 00:41

Key point

Claude Code v2.1.129 overhauled autonomous loop instructions and background agent classification.

Details

In v2.1.129, the CLAUDE_CODE_LOOP_PERSISTENT system prompt was added, refining the timer invocation instructions for autonomous work loops and encouraging continuation of already-started work and the current PR.

Before stopping, it now first broadens scope to check, and irreversible actions are not to proceed without clear approval.

Conversely, the verification specialist subagent prompt and the background agent state classification example data were removed.

The background agent state classifier made the done / working / blocked / failed boundaries more specific, and expanded the following items.

  • Marker rules
  • Built-in examples
  • cron and repolling handling
  • Distinction between optional-offer and delivery-gate
  • detail, needs, and output.result guidance for the lock screen
system-promptclaude-codeautonomous-loop
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