Borrowing it
Nothing to install: this file belongs to wictorwilen/MRSF. 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/wictorwilen/MRSF/main/.github/copilot-instructions.mdgit 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/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/wictorwilen/mrsf/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/wictorwilen/mrsf/copilot-instructions.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 | $0.01574 | $0.01574 |
| Opus 5.5 | $0.00630 | $0.00630 |
| Sonnet 5.5 | $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 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.
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.
- 1mo 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 (31 stars, last pushed 28d ago), licensed MIT. It adds 1,574 tokens to every session, about $0.0063 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 2026-08-30.
Other instructions, from other repositories
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).
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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).