Day three: the loop leaves a trace

说明与用途

为每次代理运行实现了带时间戳的日志记录，并改进了错误处理，确保每次执行都可追踪和调试。

问题

The agent loop ran but produced no visible output or error, and subsequent runs overwrote previous logs, making it impossible to review past executions.

结果

All agent runs now leave a trace in timestamped JSON files, enabling review of status, cost, and debugging. The loop’s error handling is robust, and ticket lookup is accurate.

工作流

• 1. Identify ticket file by name or heading using grep with fallback.
• 2. Neutralize pipefail with || true to allow error block execution.
• 3. Anchor grep to ^# US-XX to avoid false positives.
• 4. Execute agent loop and pipe output to Claude.
• 5. Tee output to a timestamped history file in history/<TICKET_ID>_<timestamp>.json.
• 6. Verify script with bash -n and isolated simulation.
• 7. Review history files for status, cost, and debugging information.

证据

The loop had been running for two days, and that early morning, for the first time, there was no way to see it.

来源

The fix added a second content-matching attempt — look for the # US-04 — ... heading inside the file when the name isn't enough — and neutralized pipefail with || true on both pipelines, so the existing error block would actually run when it should.

来源

The implementation was a tee at the end of the pipeline: claude ... | tee "$HISTORY_FILE"

来源