Borrowing it
Nothing to install: this file belongs to damienbenveniste/substack-mcp. 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/damienbenveniste/substack-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/damienbenveniste/substack-mcpWrote 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/damienbenveniste/substack-mcp/agents-md)<a href="https://agentmods.dev/instructions/damienbenveniste/substack-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/damienbenveniste/substack-mcp/agents-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/damienbenveniste/substack-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/damienbenveniste/substack-mcp/agents-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 | $0.01203 | $0.01203 |
| Opus 5.5 | $0.00481 | $0.00481 |
| Sonnet 5.5 | $0.00241 | $0.00241 |
| Haiku 4.5 | $0.00120 | $0.00120 |
Grade A, and why
substack-mcp AGENTS.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 2mo 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 — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Instructions
These rules apply to every code, test, documentation, and configuration change in this repository.
Project Orientation
- This is
substack-mcp, a strict TypeScript package generated byscaffold-guard. - Keep source in
src/and tests intests/. - Treat this file as the shared instruction source for coding agents.
- This repository implements a private Substack draft MCP server. Keep product scope draft-only unless the user explicitly changes that boundary.
- Keep roadmap and milestone material in plan documents or README sections, not in this operating contract.
Working Style
- Start by inspecting relevant files, tests, docs, and current repository state.
- Make focused changes that satisfy the request without unrelated rewrites.
- Preserve user changes and do not overwrite existing work without explicit intent.
- Do not claim completion until relevant validation has passed or a concrete blocker is reported.
Delegation and External Context
- Keep the main thread focused on decisions, edits, validation, and final synthesis.
- For non-trivial implementation work, use worker subagents when available and assign concrete files, modules, templates, docs, tests, or configuration ownership before substantial local edits.
- Use read-only subagents for bounded work that would otherwise clutter the main thread: broad codebase reconnaissance, test-failure triage, documentation review, compatibility research, or issue/PR summarization.
- Give subagents a narrow brief with explicit paths, ownership, expected output, and recommended validation. Do not delegate final judgment, destructive actions, secret handling, or release decisions.
- Treat subagent output as evidence to verify, not as authoritative truth. The primary agent owns all edits and completion claims.
- Use MCP servers when available for current external context: repository hosting for issues, PRs, and CI; documentation/context servers for library APIs; browser tools for rendered UI checks; and read-only database or observability servers for diagnostics.
- Keep MCP usage read-only unless the user explicitly asks for mutation. If an MCP server is unavailable, continue with repo-local evidence and state the limitation.
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.
- 2mo ago First seen · 119 lines · 1,203 tokens per session scan A 5969a839c1cb
substack-mcp AGENTS.md is an instructions file published in the GitHub repository damienbenveniste/substack-mcp (1 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 1,203 tokens to every session, about $0.0048 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 2026-08-31.
substack-mcp AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| substack-mcp AGENTS.mddamienbenveniste/substack-mcp | Instructions file | 1 | 1mo ago | Apache-2.0 | A | 1,203 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |