Borrowing it
Nothing to install: this file belongs to LBurny/symkit-mcp. 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/LBurny/symkit-mcp/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/LBurny/symkit-mcpWrote 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/lburny/symkit-mcp/copilot-instructions)<a href="https://agentmods.dev/instructions/lburny/symkit-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/lburny/symkit-mcp/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/lburny/symkit-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/lburny/symkit-mcp/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 | $0.00419 | $0.00419 |
| Opus 5.5 | $0.00168 | $0.00168 |
| Sonnet 5.5 | $0.00084 | $0.00084 |
| Haiku 4.5 | $0.00042 | $0.00042 |
Grade A, and why
symkit-mcp 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.
What it actually says
Copilot Custom Instructions
This document provides project context for VS Code GitHub Copilot Agent Mode.
Development Philosophy
- Write or update design docs before changing behavior.
- Add tests to
tests/for any new logic. - Keep the Domain Layer free of external dependencies.
Governance
You must follow this hierarchy:
- Constitution:
CONSTITUTION.md— top-level principles, must not be violated - Bylaws:
.github/bylaws/*.md— detailed rules
Architecture Principles
- Domain-Driven Design (DDD)
- Data Access Layer (DAL) must be independent
- Dependency direction:
Presentation → Application → Domain ← Infrastructure
See .github/bylaws/ddd-architecture.md for details.
Python Environment (uv preferred)
- Prefer uv for package and virtual environment management.
- New projects must create
pyproject.toml+uv.lock. - Do not install packages globally.
# Initialize environment
uv venv
uv sync --all-extras
# Install dependencies
uv add package-name
uv add --dev pytest ruff
See .github/bylaws/python-environment.md for details.
Git Workflow
Before committing, run this checklist:
- ✅ Run tests:
uv run pytest - ✅ Run lint:
uv run ruff check src/ tests/ - ✅ Run type check:
uv run mypy src/ - 📖 Update README if user-facing behavior changed
- 📋 Update CHANGELOG if applicable
- 🗺️ Update ROADMAP if progress was made
See .github/bylaws/git-workflow.md for details.
Project Notes
- SymKit is a domain-agnostic symbolic formula derivation engine.
- It exposes 45 MCP tools for math, derivation sessions, assumptions, verification, and orchestration.
- Respond in Simplified Chinese when the user writes in Chinese.
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 Changed 36760ee5cb73
- 1mo ago Changed d48e34209598
- 2mo ago First seen · 74 lines · 419 tokens per session scan A 8fd370b7253e
symkit-mcp copilot-instructions.md is an instructions file published in the GitHub repository LBurny/symkit-mcp (13 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 419 tokens to every session, about $0.0017 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 2026-08-31.
Other instructions, from other repositories
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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.
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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).
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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.
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).
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.