What is matimo copilot-instructions.md?

A repository guide for Matimo, a software development kit that defines tools in YAML and runs them from TypeScript or Python. It describes the monorepo layout, SDK layers, provider packages, and supported agent runtimes.

Use it as background when developing or modifying Matimo's core, command-line tools, provider packages, or TypeScript and Python SDKs.

It gives coding agents the project map and shared terminology they need before making changes. This helps them place files in the right package and understand how the two SDKs relate.

How tallclub/matimo configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to tallclub/matimo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/tallclub/matimo/main/.github/copilot-instructions.md

Clone the repo

git clone --depth 1 https://github.com/tallclub/matimo

Made for: GitHub Copilot.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/tallclub/matimo/copilot-instructions/github.svg)](https://agentmods.dev/instructions/tallclub/matimo/copilot-instructions)

Your own site

<a href="https://agentmods.dev/instructions/tallclub/matimo/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/tallclub/matimo/copilot-instructions/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/tallclub/matimo/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/tallclub/matimo/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 7,883 This file is loaded in full into every session.

When invoked 7,883 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.07883	$0.07883
Opus 5.5	$0.03153	$0.03153
Sonnet 5.5	$0.01577	$0.01577
Haiku 4.5	$0.00788	$0.00788

Measured 1mo ago against content hash f8fa5458520f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

matimo copilot-instructions.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 1mo 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.

.github/copilot-instructions.md · 765 lines

How it starts

The opening of the file, as written. The whole thing — 765 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot Instructions for Matimo

30-Second Summary

Matimo is a configuration-driven AI tools SDK. Define tools once in YAML and execute them from:

TypeScript SDK (MatimoInstance.init() → execute()) — factory, decorator, LangChain, MCP patterns
Python SDK (Matimo.init() → execute()) — factory, decorator, LangChain, CrewAI, MCP patterns
10 provider packages — Slack, GitHub, Gmail, Notion, Postgres, Twilio, HubSpot, Mailchimp (TS + Python)

The big idea: Write YAML once, use everywhere — across frameworks, languages, and agent runtimes.

Monorepo Structure

matimo/
├── typescript/          # TypeScript SDK (pnpm workspaces)
│   ├── packages/core/   # Core SDK: MatimoInstance, executors, policy, MCP, skills
│   ├── packages/cli/    # CLI: validate, install, doctor, search, review, mcp
│   ├── packages/slack/  # Slack provider tools
│   ├── packages/github/ # GitHub provider tools
│   ├── packages/gmail/  # Gmail provider tools
│   ├── packages/notion/ # Notion provider tools
│   ├── packages/postgres/
│   ├── packages/twilio/
│   ├── packages/hubspot/
│   └── packages/mailchimp/
├── python/              # Python SDK (uv workspaces)
│   ├── packages/core/   # Core SDK: Matimo, executors, policy, MCP, skills
│   ├── packages/cli/    # CLI (Python)
│   ├── packages/slack/  # Slack provider tools
│   ├── packages/github/
│   ├── packages/gmail/
│   ├── packages/notion/
│   ├── packages/postgres/
│   ├── packages/twilio/
│   ├── packages/hubspot/
│   ├── packages/mailchimp/
│   └── examples/        # native/, langchain/, crewai/ usage patterns
│       └── mcp/         # HTTP MCP server (port 3101) — exposes all tools via JSON-RPC
├── docs/                # GitHub Pages documentation (matimo.dev/docs)
│   └── mcp/             # MCP setup & developer guides (SETUP_GUIDE, QUICK_REFERENCE, etc.)
├── landing-page/        # Marketing site (matimo.dev)
└── .github/
    ├── copilot-instructions.md  # This file
    ├── agents/          # VS Code Copilot agent definitions
    │   ├── matimo-tool-creator.agent.md           # Original tool creator agent
    │   └── matimo-tool-creator-refactored.agent.md # Lean orchestrator (200 lines)
    ├── skills/          # Reusable skill files for agents
    │   ├── matimo-provider-creation/SKILL.md      # Bilingual TS+Python provider patterns (400+ lines)
    │   ├── matimo-tool-generator/SKILL.md          # Self-maintenance patterns (220 lines)
    │   └── tool-creation/SKILL.md                 # General tool creation guidance
    └── workflows/       # GitHub Actions CI/CD

Read the full file on GitHub · 765 lines

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.

1mo ago First seen · 765 lines · 7,883 tokens per session scan A f8fa5458520f

Subscribe to this mod's changes

matimo copilot-instructions.md is an instructions file published in the GitHub repository tallclub/matimo (18 stars, last pushed yesterday), licensed MIT. It adds 7,883 tokens to every session, about $0.0315 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 2026-10-05.

Building agents

matimo copilot-instructions.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
matimo copilot-instructions.mdtallclub/matimo	Instructions file	18	yesterday	MIT	A	7,883	GitHub Copilot
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	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

matimo: Instructions file for GitHub Copilot