Borrowing it
Nothing to install: this file belongs to toniher/youtube-personal-feed. 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/toniher/youtube-personal-feed/main/AGENTS.mdgit clone --depth 1 https://github.com/toniher/youtube-personal-feedWrote 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/toniher/youtube-personal-feed/agents-md)<a href="https://agentmods.dev/instructions/toniher/youtube-personal-feed/agents-md"><img src="https://agentmods.dev/badge/instructions/toniher/youtube-personal-feed/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/toniher/youtube-personal-feed/agents-md"><img src="https://agentmods.dev/badge/instructions/toniher/youtube-personal-feed/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 | $0.01862 | $0.01862 |
| Opus 5 | $0.00931 | $0.00931 |
| Sonnet 5 | $0.00372 | $0.00372 |
| Haiku 4.5 | $0.00186 | $0.00186 |
Grade A, and why
youtube-personal-feed 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 8d 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 — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Guidelines for YouTube Personal Feed MCP Server
This repository provides an MCP (Model Context Protocol) server and a CLI for a user's personal YouTube subscription feed and video details using the YouTube Data API v3 and Google OAuth 2.0.
Project Overview
- Name:
youtube-personal-feed - Runtime: Node.js (>= 18), TypeScript (ES2022 / NodeNext ESM)
- Protocol: MCP over
stdiotransport (@modelcontextprotocol/sdk) - API Integration: YouTube Data API v3 via
googleapisandgoogle-auth-library - Interfaces: MCP over stdio and JSON-output CLI
- Key Purpose: List subscriptions, build subscription video feeds, query channel uploads, and retrieve video details.
Directory & Layout
youtube-personal-feed/
├── package.json # Scripts, dependencies, binary definition
├── LICENSE # MIT license
├── tsconfig.json # Root TypeScript config (ES2022, NodeNext)
├── tsconfig.build.json # Build-specific config (compiles src/ -> dist/)
├── .env.example # Template for CLIENT_ID and CLIENT_SECRET
├── .github/workflows/
│ └── publish.yml # Release-triggered npm publishing workflow
├── scripts/
│ └── smoke.ts # Standalone smoke test script
└── src/
├── config.ts # Environment loading (.env) and path helper functions
├── types.ts # Shared TypeScript interfaces (SubscriptionItem, FeedVideo, VideoDetail)
├── auth.ts # One-time OAuth 2.0 loopback server flow
├── cli.ts # JSON-output CLI entrypoint
├── youtube.ts # YouTube API wrapper client with in-memory caching & error mapping
└── index.ts # MCP server entrypoint exposing tools over stdio
Command Reference
| Command | Purpose |
|---|---|
npm run typecheck |
Validates TypeScript types across src/ and scripts/ using tsc --noEmit. |
npm run build |
Compiles TypeScript files from src/ to dist/ via tsconfig.build.json. |
npm run dev |
Runs the MCP server in development mode using tsx src/index.ts. |
npm run start |
Runs the production build (node dist/index.js). |
npm run auth |
Launches the local loopback server to handle Google OAuth authentication. |
npm run cli -- <args> |
Runs the CLI from source; for example, npm run cli -- feed --limit 10. |
npm run smoke |
Executes the smoke test script (scripts/smoke.ts) to test API operations. |
npm run lint |
Lints TypeScript sources and verifies their Biome formatting. |
npm run format |
Applies Biome formatting to TypeScript sources. |
npm run precommit |
Runs the staged-file checks and full TypeScript typecheck used by the pre-commit hook. |
npm pack --dry-run |
Verifies the files included in the published npm package. |
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.
- 8d ago First seen · 126 lines · 1,862 tokens per session scan A d87e86d1e945
youtube-personal-feed AGENTS.md is an instructions file published in the GitHub repository toniher/youtube-personal-feed (0 stars, last pushed 10d ago), licensed MIT. It adds 1,862 tokens to every session, about $0.0093 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 2026-08-31.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.