Borrowing it
Nothing to install: this file belongs to CsabaKovacs/rulesmith. 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/CsabaKovacs/rulesmith/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/CsabaKovacs/rulesmithWrote 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/csabakovacs/rulesmith/copilot-instructions)<a href="https://agentmods.dev/instructions/csabakovacs/rulesmith/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/csabakovacs/rulesmith/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/csabakovacs/rulesmith/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/csabakovacs/rulesmith/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 | $0.00448 | $0.00448 |
| Opus 5.5 | $0.00179 | $0.00179 |
| Sonnet 5.5 | $0.00090 | $0.00090 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
rulesmith 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 — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Copilot Instructions for rulesmith
Purpose
This repository builds rulesmith: a local-first MCP server + CLI for deterministic repository evidence and instruction file generation.
Primary Stack
- TypeScript + Node.js ESM monorepo.
- Source code under
packages/*/src. - Fixture repositories under
examples/fixturesare test inputs, not production architecture.
Required Workflow
- Prefer small, scoped changes.
- Keep behavior evidence-backed with file references.
- Preserve contracts unless a breaking change is explicitly requested.
- Update tests/docs with behavior changes.
Commands
- install:
pnpm install - build:
pnpm -r build - test:
pnpm -r test - lint:
pnpm -r lint
Critical Guardrails
- Do not weaken safe path protections in
packages/core/src/fs/safe.ts. - Do not broaden write allowlist casually.
- Keep MCP logs on stderr and avoid protocol-breaking stdout noise.
- Maintain MCP tool compatibility where possible.
- Keep render target outputs stable:
AGENTS.mdCLAUDE.md.junie/guidelines.md.github/copilot-instructions.md.github/instructions/*.instructions.md
Change-Specific Requirements
- If changing renderer templates/behavior, update
packages/core/test/render.test.tsand snapshots. - If changing scanner/sampling logic, verify bundle and sampling behavior remains deterministic.
- If changing CLI flags/examples, update
README.mdanddocs/integrations/*. - If changing risk/data-handling behavior, update
SECURITY.mdand README disclaimers.
Do / Don't
- DO edit
srcfirst and rebuilddist. - DO keep TypeScript types explicit across public boundaries.
- DO preserve backward compatibility for MCP schema changes when feasible.
- DON'T infer core project standards from fixture language files.
- DON'T introduce broad rewrites mixed with functional changes.
- DON'T include secrets in prompts, examples, or evidence artifacts.
Unknowns
- Root
formatscript is not defined. - Root
devscript is not defined.
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 · 52 lines · 448 tokens per session scan A 05d36157bd81
rulesmith copilot-instructions.md is an instructions file published in the GitHub repository CsabaKovacs/rulesmith (15 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 448 tokens to every session, about $0.0018 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.
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.