Borrowing it
Nothing to install: this file belongs to membrane/api-gateway. 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/membrane/api-gateway/master/CLAUDE.mdgit clone --depth 1 https://github.com/membrane/api-gatewayWrote 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/membrane/api-gateway/claude-md)<a href="https://agentmods.dev/instructions/membrane/api-gateway/claude-md"><img src="https://agentmods.dev/badge/instructions/membrane/api-gateway/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/membrane/api-gateway/claude-md"><img src="https://agentmods.dev/badge/instructions/membrane/api-gateway/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 | $0.02145 | $0.02145 |
| Opus 5.5 | $0.00858 | $0.00858 |
| Sonnet 5.5 | $0.00429 | $0.00429 |
| Haiku 4.5 | $0.00215 | $0.00215 |
Grade A, and why
api-gateway 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 26d 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.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Membrane API Gateway — a lightweight Java API gateway for REST, GraphQL, and legacy SOAP/WSDL services, configurable in YAML or XML. Upstream: https://github.com/membrane/api-gateway
Git & Commit Policy
- NEVER commit, push, or open/merge a PR unless the user explicitly asks for it in that moment. Stage nothing automatically; report what changed and wait.
- Use
Closes #<issue>in commit messages when the work resolves a filed issue. - Never commit customer-derived artifacts — real customer names, WSDLs, XML, or sample payloads,
not even as test fixtures. Generate synthetic equivalents (
example.com-style) or reuse existing generic fixtures.
Working principles
- Don't refactor, reformat, or "improve" adjacent code, even if it's messy. Remove imports/vars/methods your change made unused; leave pre-existing dead code alone (mention it, don't touch it).
- For bug fixes: reproduce with a failing test first, then fix.
- If a simpler approach than the one requested exists, say so, even if it means pushing back.
Modules
Maven multi-module reactor (root pom.xml), Java 21 (javac.source/target):
annot— the@MCElement/@MCAttribute/... annotations that drive the config grammar; also generatesrouter-conf.xsd.core— the router engine and all built-in interceptors/plugins. Primary library code.distribution— assembles the runnable.zip(membrane.sh/membrane.cmd,conf/proxies.xml,tutorials/,examples/). Also owns the tutorial/example integration tests.distribution/router/conf/is what actually ships as the zip'sconf/(seesrc/assembly/distribution.xml);distribution/conf/is a separate, unpackaged scratch directory for the programmer's own local testing — never treat it as shipped config or reference it from tutorials/examples/docs.war— packagescorefor deployment into a servlet container (Tomcat, Jetty).test— shared test utilities (HTTP client helpers, fixtures), depended on astestscope.
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.
- 26d ago Changed · +18 lines · +321 tokens per session 3c72ded45936
- 1mo ago Changed · +8 lines · +119 tokens per session b4e0ad1c75ee
- 1mo ago Changed · -39 lines · -592 tokens per session 75756f407748
- 1mo ago Changed · +1 lines · +65 tokens per session 03d66102d04a
- 1mo ago Changed · -6 lines · -334 tokens per session aff813f773d8
- 2mo ago First seen · 167 lines · 2,566 tokens per session scan A 2ea02d1231a8
api-gateway CLAUDE.md is an instructions file published in the GitHub repository membrane/api-gateway (656 stars, last pushed yesterday), licensed Apache-2.0. It adds 2,145 tokens to every session, about $0.0086 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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