Under the hood
Useful1 Signal1
Diagnostics logging only builds its payload when a diagnostics file is set, and never throws.
What's wrong with this entry?
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What
The diagnostics log writer now accepts a function as its payload and calls it only when a diagnostics file is configured, so the cost is skipped otherwise. If building or serialising the payload throws, it writes a failure record instead of letting the error escape.
Details
- Active only when
CLAUDE_CODE_DIAGNOSTICS_FILEis set.
Evidence
diagnostics_payload_failed
Strings lifted out of the shipped bundle, so the claim above can be checked against them.