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.
npx agentmods add instructions/wictorwilen/mrsf/copilot-instructionsgit clone --depth 1 https://github.com/wictorwilen/MRSFWrote 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/wictorwilen/mrsf/copilot-instructions)<a href="https://agentmods.dev/instructions/wictorwilen/mrsf/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/wictorwilen/mrsf/copilot-instructions.svg" alt="Measured on agentmods" 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 | $0.01574 | $0.01574 |
| Opus 5 | $0.00787 | $0.00787 |
| Sonnet 5 | $0.00315 | $0.00315 |
| Haiku 4.5 | $0.00157 | $0.00157 |
Grade A, and why
MRSF 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 6d 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions for MRSF
Project Overview
MRSF (Markdown Review Sidecar Format), also known as Sidemark, is a specification plus tooling for storing review comments in sidecar files alongside Markdown documents. The canonical spec is MRSF-v1.0.md.
Repository Architecture
This is a multi-package monorepo with no root package.json. Each package is managed independently:
| Package | Path | npm name | Build | Purpose |
|---|---|---|---|---|
| CLI & library | cli/ |
@mrsf/cli |
tsc |
Core library + CLI binary (mrsf) |
| MCP server | mcp/ |
@mrsf/mcp |
esbuild |
Model Context Protocol server for AI agents |
| Plugin shared | plugins/shared/ |
@mrsf/plugin-shared |
tsc |
Shared types, comment logic, CSS, and controller for rendering plugins (private) |
| markdown-it plugin | plugins/markdown-it/ |
@mrsf/markdown-it-mrsf |
tsc |
Standalone markdown-it plugin for rendering comments |
| rehype plugin | plugins/rehype/ |
@mrsf/rehype-mrsf |
tsc |
Standalone rehype plugin for rendering comments (unified ecosystem) |
| VS Code extension | vscode/ |
mrsf-vscode |
esbuild |
Editor integration (marketplace: wictor.mrsf-vscode) |
| Documentation | docs/ |
(private) | VitePress | Site deployed to Azure Static Web Apps |
Key dependencies:
@mrsf/mcpdepends on@mrsf/cliviafile:../cli@mrsf/markdown-it-mrsfand@mrsf/rehype-mrsfdepend on@mrsf/plugin-sharedviafile:../sharedand@mrsf/cliviafile:../../cli
Build, Test, and Lint
All commands run from within the respective package directory — there is no root-level build.
TypeScript packages (cli/, mcp/, vscode/, plugins/)
# Build
npm run build
# Run all tests (Vitest)
npm test
# Run a single test file
npx vitest run src/__tests__/reanchor.test.ts
# Run tests matching a pattern
npx vitest run -t "fuzzy match"
# Type-check without emitting
npm run lint
Tests live in src/__tests__/ within each package. Packages with test suites: cli (most comprehensive), mcp, plugins/markdown-it, plugins/rehype. The VS Code extension and plugins/shared have no tests.
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.
- 6d ago First seen · 102 lines · 1,574 tokens per session scan A 1cc89024863c
MRSF copilot-instructions.md is an instructions file published in the GitHub repository wictorwilen/MRSF (28 stars, last pushed 18d ago), licensed MIT. It adds 1,574 tokens to every session, about $0.0079 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.
Other instructions, from other repositories
mq commit.instructions.md
Instructions for harehare/mq: Use the following format for commit messages.
core copilot-instructions.md
Copilot instructions for asdecided/core: These decisions are already accepted. Do not re-open or contradict them; ask the AsDecided MCP tools (getartifact, searchartifacts) for the full text before proposing a change that touches one.
telegramify-markdown AGENTS.md
Instructions for sudoskys/telegramify-markdown, covering telegramify-markdown agent guide, task routing, quick commands, project rules and architecture map.
easy-notion-mcp CLAUDE.md
Claude Code instructions for Grey-Iris/easy-notion-mcp, covering easy-notion-mcp, open source context, .meta/ publication policy (hybrid, 2026-07-02), standing priorities and commands.
research-os AGENTS.md
Instructions for lxinfei5/research-os, covering researchos — constitution, §0 what this is, §1 directory discipline, §2 half-life (innovation 1) — memory design and §3 behavior pillars (innovations 2–5).
markview CLAUDE.md
Instructions for paulhkang94/markview, covering markview — ai development guide, quick reference, architecture, mcp tools (for ai integration) and safety rules.