agentmods.dev

codemirror-mcp AGENTS.md

Project instructions for developing CodeMirror 6 integration with the Model Context Protocol, a standard for connecting AI tools and context to applications. They cover installation, tests, linting, type checks, demos, and releases.

In plain words
What is it for?
Use them when installing dependencies, running tests or checks, building the demo, or publishing the CodeMirror MCP package.
Why use it?
They give contributors the project's required commands and release process in one place.

Instructions file for CodexOpenCode

79 1mo ago A scan 215 tokens original Apache-2.0
View the source file marimo-team/codemirror-mcp
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/marimo-team/codemirror-mcp/agents-md
Clone the repo
git clone --depth 1 https://github.com/marimo-team/codemirror-mcp

Made for: Codex, OpenCode.

Per session 215 This file is loaded in full into every session.
When invoked 215 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00215 $0.00215
Opus 5 $0.00108 $0.00108
Sonnet 5 $0.00043 $0.00043
Haiku 4.5 $0.00021 $0.00021

Measured 3d ago against content hash a3f07c3593d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codemirror-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 3d 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.

AGENTS.md · 18 lines

What it actually says

codemirror-mcp

CodeMirror 6 extension implementing the Model Context Protocol for @resource mention and /prompt command completions. Published to npm as @marimo-team/codemirror-mcp and used by marimo's editor.

Development

pnpm install --ignore-scripts --frozen-lockfile  # CI install
pnpm test              # vitest
pnpm run lint          # biome check --write (autofix.ci runs this on PRs)
pnpm exec biome ci .   # non-mutating lint CI enforces
pnpm run typecheck     # tsc --noEmit
pnpm run demo          # vite build of demo/
  • Install with --ignore-scripts: the prepare script otherwise runs husky install && pnpm build on every install.
  • Release: pnpm run release (pnpm version) bumps + tags; pushing a v* tag triggers release.yml, which publishes to npm via OIDC.
Changes

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.

  1. 3d ago First seen · 18 lines · 215 tokens per session scan A a3f07c3593d1

Subscribe to this mod's changes

codemirror-mcp AGENTS.md is an instructions file published in the GitHub repository marimo-team/codemirror-mcp (79 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 215 tokens to every session, about $0.0011 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.

codemirrorcodemirror-extensionmcp
Related

Other instructions, from other repositories

LeGit CLAUDE.md

Claude Code instructions for ateleris/LeGit, covering legit — project guide for claude, layout, architecture & key decisions, conventions and backlog.

ateleris/LeGit · 4,285 tokens

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).

microsoft/vscode · 6,785 tokens

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.

github/spec-kit · 7,104 tokens

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.

openai/codex · 5,182 tokens

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.

langchain-ai/langchain · 4,345 tokens

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).

microsoft/vscode · 5,001 tokens