Borrowing it
Nothing to install: this file belongs to atlanhq/atlan-python. 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/atlanhq/atlan-python/main/CLAUDE.mdgit clone --depth 1 https://github.com/atlanhq/atlan-pythonWrote 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/atlanhq/atlan-python/claude-md)<a href="https://agentmods.dev/instructions/atlanhq/atlan-python/claude-md"><img src="https://agentmods.dev/badge/instructions/atlanhq/atlan-python/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/atlanhq/atlan-python/claude-md"><img src="https://agentmods.dev/badge/instructions/atlanhq/atlan-python/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 | $0.00346 | $0.00346 |
| Opus 5.5 | $0.00138 | $0.00138 |
| Sonnet 5.5 | $0.00069 | $0.00069 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
atlan-python 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
Security
Follow these security guidelines for every change to the pyatlan SDK.
Contact
- Security Team: #bu-security-and-it on Slack
Quickstart for Agents
pyatlan is Atlan's Python SDK. It wraps the Atlan REST API using httpx, handles API key auth, and provides typed models for all Atlan entities. Review every change for:
- API key logging — the
api_key(and impersonation tokens fromImpersonationClient) must never appear in log output or error messages; log only thebase_urland response status codes. verify=Falsein httpx transport — TLS certificate verification must not be disabled;trust_env=Trueis correct for proxy support.- Proxy credential leakage — if proxy credentials are configured via environment variables (
HTTPS_PROXY), they must not be echoed in log output. - User-supplied URL validation —
base_urlmust be validated as HTTPS before constructing the client.
Security Invariants
- [MUST]
api_keyand impersonation tokens must never appear in log output. - [MUST] TLS certificate verification must not be disabled (
verify=Falseis forbidden). - [MUST]
base_urlmust be validated as HTTPS.
Review Checklist
-
api_keyand impersonation tokens absent from all log output and error messages -
verify=Falsenot used in any httpx transport or session -
base_urlvalidated as HTTPS before client construction - All direct dependencies in
pyproject.tomlpinned exactly
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 First seen · 30 lines · 346 tokens per session scan A cf593fc1eb69
atlan-python CLAUDE.md is an instructions file published in the GitHub repository atlanhq/atlan-python (21 stars, last pushed yesterday), licensed Apache-2.0. It adds 346 tokens to every session, about $0.0014 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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