Library
Claude SDK Audit Kit
Kit files are in English.
Map where your setup uses the Claude SDK and estimate its billing exposure.
Yearly: every kit included. Monthly: one new kit per billing cycle.
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Monthly: one new standalone kit per billing cycle, no bundles. Re-downloads are free and do not use a new claim.
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How it works
Anthropic announced a separate billing pool for the Agent SDK and claude -p, then pulled it on the day it was due to take effect. The pause is not a promise: they committed to advance notice before the next change, not to never changing billing again. This kit maps your exposure now, while knowing costs you nothing. Hand it to your Claude Code agent, say "run the audit", and it finds every claude -p call, Agent SDK import, and cron or launchd job on your machine, then estimates what each plan would charge if programmatic usage moved to API rates. Four mitigation playbooks are ready to apply the day the next change lands: drive interactive Claude, add a second harness, route narrow calls, audit and trim. 12 months of updates, so when Anthropic moves again the kit moves with it.
An add-on for the Claude Code agent you already run. Maps your SDK exposure before the next billing change.
Latest update: 2026-09-09
September 9, 2026: Cost estimator recomputed at current list rates (Sonnet 5 at $2 / $10, Opus 5 at $5 / $25), which lowers the modelled per-call cost by about 19%. Routing mitigations now name current models instead of retired ones.
What you get
Package includes
- •START-HERE.html: styled entry page, open first
- •AGENT-INSTRUCTIONS.md: prompt your Claude Code uses to drive the audit
- •README.md: pitch and overview
- •QUICKSTART.md: 10-minute DIY install
- •audit/run-audit.sh: wrapper that runs the four sub-scripts
- •audit/scan-claude-p.sh: finds every claude -p invocation in scripts, cron, launchd, shell config
- •audit/scan-sdk-imports.py: finds Agent SDK imports across Python and TypeScript repos
- •audit/find-cron-leaks.sh: surfaces cron jobs and launchd plists that touch Claude
- •audit/estimate-cost.py: ballparks monthly cost on each plan with assumptions you can tune
- •mitigations/01-drive-interactive-claude.md: the AppleScript + Terminal + clipboard paste pattern
- •mitigations/02-second-harness.md: Codex as insurance + extension
- •mitigations/03-route-narrow-calls.md: OpenRouter and local-model routing recipes
- •mitigations/04-trim-checklist.md: KILL, SLOW, MERGE, TRIM, CHEAPER, INTERACTIVE, HARNESS-SWAP labels
- •templates/migration-spec.md: one-page migration spec per call
- •templates/audit-report-template.md: shape of the output your agent writes
- •examples/example-audit-report.md: sanitized worked example from my own machine
- •CHANGELOG.md: update history
FAQ
Why $9.99 and not the usual kit price?
This is a cheap add-on, not a full kit. The audit scripts are simple, the playbooks are short, the migration spec is one page. The value is timing. If you wait until July to run an audit, your June bill already hurts.
Does this work with Codex or Cursor?
The audit can scan any directory and find imports for any provider, but the cost model and the four mitigations are Claude-specific. If you only use Codex, this kit is not for you.
How accurate is the cost estimate?
It is a ballpark with documented assumptions. Default is 50k input + 5k output tokens per call, 70% Sonnet 5 / 30% Opus 5 mix at September 2026 list rates, no prompt cache credit. Tweak the constants in estimate-cost.py to match your measured usage. Real bills will usually be lower because of prompt caching.
Will Anthropic patch Mitigation 1 (driving interactive Claude)?
Probably, inside a year. The kit treats it as a 6-12 month bridge and tells you so. The orchestration pattern (one job, one window, one result file) is reusable. The specific clipboard-paste trick might not be.
I am on Pro, not Max. Is this still worth $9.99?
If you have any cron firing claude -p, yes. The Pro credit is $20 and the audit usually shows that a single misconfigured cron drains it in a week. The trim checklist alone pays the kit back.
How does the 12-month update policy work?
Your purchase confirmation has a download link. Reuse that link within 12 months for the latest version. When Anthropic ships the next pricing change, the kit gets a new mitigation chapter and your existing download upgrades.