Borrowing it
Nothing to install: this file belongs to tin-computer/with-md. 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/tin-computer/with-md/main/AGENTS.mdgit clone --depth 1 https://github.com/tin-computer/with-mdWrote 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/tin-computer/with-md/agents-md)<a href="https://agentmods.dev/instructions/tin-computer/with-md/agents-md"><img src="https://agentmods.dev/badge/instructions/tin-computer/with-md/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/tin-computer/with-md/agents-md"><img src="https://agentmods.dev/badge/instructions/tin-computer/with-md/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 | $0.00912 | $0.00912 |
| Opus 5 | $0.00456 | $0.00456 |
| Sonnet 5 | $0.00182 | $0.00182 |
| Haiku 4.5 | $0.00091 | $0.00091 |
Grade A, and why
with-md 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 yesterday.
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 — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for agents working in this repository.
Project Purpose
with.md is a filesystem-first markdown collaboration app:
- GitHub stores canonical markdown files.
- Convex stores synced file metadata/content and collaboration state.
- Hocuspocus + Yjs power realtime editing.
- Next.js (
web/) is the product UI and API surface.
Architecture At A Glance
web/: Next.js 15 app (port4040), UI + API routes.convex/: backend schema/functions (DB, storage, sync metadata, comments, queue).hocuspocus-server/: websocket collaboration bridge (default port3001).
Runtime flow:
- User authenticates in
web/. - Web app syncs markdown from GitHub into Convex.
- Realtime editor connects to Hocuspocus.
- Hocuspocus loads/stores snapshots and markdown through Convex HTTP actions.
- Changes queue for push back to GitHub.
Local Development
From repo root:
npm install
npx convex dev
npm run dev:hocuspocus
npm run dev:web
Validation:
npm run test:web
npm --workspace web run build
npx tsc --noEmit -p hocuspocus-server/tsconfig.json
Repository Map
web/src/components/with-md/with-md-shell.tsx: top-level UI orchestrator.web/src/components/with-md/collab-editor.tsx: TipTap/Yjs realtime editor.web/src/hooks/with-md/use-collab-doc.ts: provider lifecycle and IndexedDB behavior.web/src/app/api/auth/collab-token/route.ts: user realtime token minting.web/src/lib/with-md/collab-token.ts: token format/signing.convex/collab.ts: realtime authentication and document load/store logic.convex/http.ts: internal endpoints used by Hocuspocus.convex/mdFiles.ts: markdown file CRUD/import/move/delete/save/repair paths.convex/repos.ts: repo records and fallback seed behavior.hocuspocus-server/src/index.ts: websocket auth/load/store lifecycle.
Critical Product Invariants
- GitHub is source of truth for repository files.
- Do not enable rich edit for unsupported markdown syntax; preserve Source mode fallback.
- Realtime load/store must be idempotent; avoid duplicate bootstrap paths.
- File switching must not leak stale editor state between files.
- Prefer minimal-diff markdown updates and preserve meaningful content.
- Keep oversized-file guardrails intact (source-only editing for very large docs).
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.
- yesterday First seen · 107 lines · 912 tokens per session scan A ec52fa57a649
with-md AGENTS.md is an instructions file published in the GitHub repository tin-computer/with-md (72 stars, last pushed yesterday), licensed MIT. It adds 912 tokens to every session, about $0.0046 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 2026-09-11.
Other instructions, from other repositories
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
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).
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.
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).