Opentelemetry

A concrete wall of narrow doorways, the central one sealed by a heavy slab deeply scratched as if something kept pushing at it, with one dim doorway open beside it

Claude Code now logs every tool call it stops. Build a refusal ledger that shows which rules earn their keep

Version 2.1.307 added a telemetry event for each call a rule, hook or sandbox blocked. Point it at a 45-line local receiver and a 34-line report, and you can see what your guardrails actually do. About 15 minutes.

22 October 202610 min read

Five columns of thin glass coins stacked at different heights, the tallest glowing teal at its top

DevOps Playbook

Build a cost ledger for Claude Code: dollars per task, in about 90 lines

Claude Code can stream every API call as an OpenTelemetry event. Point it at a local receiver, tag each run with a task name, and you get a table of what each task actually cost and why. About 15 minutes.

15 October 202611 min read