Thread a request id through the log output

trailhead-api · Codex · branch chore/logging · gpt-5-codex · cwd /home/user/code/trailhead-api · id aaaf854c-68f8-76e0-040c-f2ae4a563ecc · 2026-08-11 21:10 · 2 msgs · 10 tools · 1 min read · updated 3 weeks ago

Concurrent requests interleaved in the log with no way to separate them.

tools: Read, Edit, Bash
← trailhead-api Download .md
Tool calls
Edit Edit: 8 calls (47.1%) 8 Read Read: 5 calls (29.4%) 5 Bash Bash: 4 calls (23.5%) 4
Token usage14.8K total
Input12.5K
Cache creation0
Cache read0
Output2.4K
Cache hit ratio0%· cold cache

Concurrent requests interleaved in the log with no way to separate them.

Conversation

Turn 1 — User

I cannot follow a single request through the logs when there is any traffic.

Turn 2 — Assistant

Added a request id generated at the edge, stored in a context variable, and included by the log formatter on every line. Nothing has to pass it explicitly.

It is also returned as a response header, so a report about a specific failed request can be traced directly.

Turn 3 — User

Does it survive a background task?

Turn 4 — Assistant

Only if the task is spawned from the request context. Anything scheduled outside it gets a fresh id, which is correct — it is a different unit of work.

Subjects

  • [[REST API]]
  • [[Observability]]
  • [[Python]]

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