Borrowing it
Nothing to install: this file belongs to nizos/probity. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nizos/probity/main/CLAUDE.mdgit clone --depth 1 https://github.com/nizos/probityWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/nizos/probity/claude-md)<a href="https://agentmods.dev/instructions/nizos/probity/claude-md"><img src="https://agentmods.dev/badge/instructions/nizos/probity/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/nizos/probity/claude-md"><img src="https://agentmods.dev/badge/instructions/nizos/probity/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00399 | $0.00399 |
| Opus 5.5 | $0.00160 | $0.00160 |
| Sonnet 5.5 | $0.00080 | $0.00080 |
| Haiku 4.5 | $0.00040 | $0.00040 |
Grade A, and why
probity CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Probity
Process discipline for coding agents. A vendor-agnostic policy engine that sits between the agent and the codebase, evaluating each attempted action against configurable rules and blocking or allowing it, and providing correction and guidance.
Discipline
- Strict TDD — failing test first, minimum impl to pass, no speculation.
- Atomic conventional commits — test and implementation together.
Layout
src/types.ts— the canonical domain types every layer shares.src/rules/— the built-in rules and the rule contract.rules/utils/— shared rule helpers.rules/matchers/— ast-grep test-node detection and the per-language modules enforceTdd's fast-path uses.
src/utils/— low-level cross-cutting helpers (parsing, safe and size-capped file reads, JSON/JSONL).src/vendors/— vendor-agnostic shared pieces (adapter contract, Edit-to-Write substitution, verdict parsing, path and payload shape normalization).<vendor>/— one vendor's adapter, AI agent, raw-event classifier, and transcript reader.
src/registry.ts— wires each supported vendor to its pieces.src/(top level) — application wiring: CLI, bin entry, config loading, the engine, and the trace it writes to the--debuglog.test/fixtures/— captured hook payloads, transcript fixtures, and config scenarios.test/helpers/— shared helpers for the unit and integration suites (sandboxing, bin invocation, response decoding, auth preflight).test/integration/— end-to-end tests; the AI-gated ones (enforce-tdd-*) needPROBITY_INTEGRATION_AI=1, the rest always run.docs/adr/— ADRs for load-bearing decisions and their rationale.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago Changed · +3 tokens per session 1ef3d5415e69
- 1mo ago First seen · 25 lines · 396 tokens per session scan A 9918b21b57a0
probity CLAUDE.md is an instructions file published in the GitHub repository nizos/probity (235 stars, last pushed yesterday), licensed MIT. It adds 399 tokens to every session, about $0.0016 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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