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

Thu, 22 Oct 2026 07:07:00 +0000

A deny rule that never fires is either perfect or dead, and there’s been no way to tell which. Six months after someone added Bash(curl *) to the project settings, nobody knows whether it stopped one stray download or a hundred. Meanwhile the hook that blocks destructive commands has been quietly failing on the one pattern agents actually produce, and the only evidence is a bad afternoon.

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

Thu, 15 Oct 2026 07:08:00 +0000

Somebody asks what the agent costs per ticket and the honest answer is a shrug. The /usage screen shows the current session. The Console shows the month. Neither says that the migration task burned six times what the bug fix did, or that half of Tuesday’s spend was one subagent re-reading the same directory.

Opentelemetry on Tokenise

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

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