Borrowing it
Nothing to install: this file belongs to jakub-k-slys/substack-gateway-oss. 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/jakub-k-slys/substack-gateway-oss/main/CLAUDE.mdgit clone --depth 1 https://github.com/jakub-k-slys/substack-gateway-ossWrote 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/jakub-k-slys/substack-gateway-oss/claude-md)<a href="https://agentmods.dev/instructions/jakub-k-slys/substack-gateway-oss/claude-md"><img src="https://agentmods.dev/badge/instructions/jakub-k-slys/substack-gateway-oss/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/jakub-k-slys/substack-gateway-oss/claude-md"><img src="https://agentmods.dev/badge/instructions/jakub-k-slys/substack-gateway-oss/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 | $0.02530 | $0.02530 |
| Opus 5 | $0.01265 | $0.01265 |
| Sonnet 5 | $0.00506 | $0.00506 |
| Haiku 4.5 | $0.00253 | $0.00253 |
Grade A, and why
substack-gateway-oss 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 today.
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 — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Commands
# Install dependencies (dev included, all workspace members)
uv sync --all-packages --dev
# Run the server (dev mode with reload)
uv run python -m substack_gateway.main
# Lint
uv run ruff check .
# Format check / fix
uv run ruff format --check .
uv run ruff format .
# Type-check
uv run ty check .
# Unit tests (pytest)
uv run pytest packages/gateway_oss/tests/
uv run pytest packages/gateway_drafts/tests/
uv run pytest packages/gateway_stats/tests/
# Run a single test file
uv run pytest packages/gateway_oss/tests/test_markdown.py
# BDD integration tests (behave)
uv run behave packages/gateway_oss/features/
# Run a single feature file
uv run behave packages/gateway_oss/features/api/notes.feature
# Build all workspace packages (shell + gateway_core + every domain trio)
uv build --all-packages
When introducing changes, validate them before finishing the task. Prefer targeted runs first, but the expected OSS validation set is:
uv run ruff check .uv run ruff format --check .uv run ty check .uv build --all-packagesuv run pytestuv run behave packages/gateway_oss/features/
Before committing or pushing, always run the relevant lint, format, type-check, and test commands for the touched area. Do not skip validation just because the change looks small.
Commit and PR titles must use Conventional Commits / semver-style prefixes such as feat:, fix:, chore:, docs:, refactor:, test:, or ci:. Prefer the narrowest correct prefix and keep the subject concise and imperative. For breaking changes, use Conventional Commits semver signaling with ! in the type or scope, and/or include a BREAKING CHANGE: footer in the commit body.
Repository layout
This repository is a uv workspace. The root is a thin shell package
(substack-gateway, source in src/substack_gateway/) that composes the
Starlette app; functionality is provided by per-domain packages under
packages/.
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.
- today Changed · +88 tokens per session 0eed4cbab7bd
- yesterday Changed · +29 lines · +720 tokens per session 64ed92f81e3c
- 9d ago First seen · 142 lines · 1,722 tokens per session scan A d28814038cbe
substack-gateway-oss CLAUDE.md is an instructions file published in the GitHub repository jakub-k-slys/substack-gateway-oss (26 stars, last pushed today), licensed MIT. It adds 2,530 tokens to every session, about $0.0127 per session on Opus 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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