agentmods.dev

chamber: Instructions file for GitHub Copilot

.github/copilot-instructions.md

chamber copilot-instructions.md is an instructions file for GitHub Copilot from ianphil/chamber. It costs 3,822 tokens per session, scanned A, original, MIT.

A set of project-specific instructions for GitHub Copilot, an AI coding assistant, working in the Chamber codebase.

In plain words
What is it for?
It guides code generation and review in Chamber, including TypeScript and Electron changes that must match the repository's pinned setup.
Why use it?
It reduces incompatible changes by telling Copilot which versions, architecture rules, security boundaries, and existing coding patterns to follow.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file. Also seen: mentions AGENTS.md.

This is ianphil/chamber's own configuration. It tells GitHub Copilot how to work on chamber itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything chamber configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import type { ChatService } from '../services/chat/ChatService';.

not rated 12repo 1mo ago A scan 3,822 tokens original MIT
View source ↗ ianphil/chamber chmbr.dev
Reuse

Borrowing it

Nothing to install: this file belongs to ianphil/chamber. 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/ianphil/chamber/master/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/ianphil/chamber

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.

agentmods badge for chamber copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/ianphil/chamber/copilot-instructions/github.svg)](https://agentmods.dev/instructions/ianphil/chamber/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/ianphil/chamber/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ianphil/chamber/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.

agentmods 80×15 button for chamber copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ianphil/chamber/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ianphil/chamber/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3,822 This file is loaded in full into every session.
When invoked 3,822 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.03822 $0.03822
Opus 5.5 $0.01529 $0.01529
Sonnet 5.5 $0.00764 $0.00764
Haiku 4.5 $0.00382 $0.00382

Measured 2mo ago against content hash 63c3055c6445, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

chamber 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 2mo 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 · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GitHub Copilot Instructions — Chamber

These instructions tell Copilot how to produce code that fits the Chamber codebase. They reflect patterns that already exist here. When in doubt, prefer consistency with surrounding code over external best practices.

Priority Guidelines

  1. Version compatibility — match the exact versions pinned in package.json and .nvmrc. Never use APIs newer than what is installed.
  2. Architecture first — respect the dependency direction described in Architecture below. A change that violates it is wrong, even if it compiles.
  3. Read these files first when context is needed: AGENTS.md, CONTRIBUTING.md, CHANGELOG.md, tsconfig.json, eslint.config.mjs.
  4. Codebase patterns over invention — scan neighboring files (same folder, same kind of test, same kind of service) and copy their shape. Do not introduce a pattern that does not already exist somewhere in src/.
  5. Security boundaries are non-negotiable — see Security below.

Stack & Versions (pinned)

  • Runtime: Node 24.15.0 (.nvmrc), Electron 41
  • Language: TypeScript 6.0, ESM source (CommonJS module target in tsconfig.json), target: ESNext, strict: true, noImplicitAny: true, moduleResolution: bundler, JSX react-jsx
  • Path alias: @/* → ./src/* (tsconfig + config/vitest.config.ts + components.json)
  • UI: React 19, Tailwind CSS 4, shadcn/ui style radix-nova (Radix primitives + CVA + tailwind-merge + clsx), Lucide icons
  • Markdown: react-markdown + remark-gfm + rehype-highlight + highlight.js
  • Build: Electron Forge 7.11 + @electron-forge/plugin-vite + Vite 8
  • Testing: Vitest 4, @testing-library/react, @testing-library/jest-dom, jsdom
  • Lint: ESLint 10 flat config, typescript-eslint 8, eslint-plugin-import-x
  • Copilot SDK: @github/[email protected] and @github/[email protected] — both pinned exactly, not ranged. The runtime is committed under chamber-copilot-runtime/ and shipped in the package; do not bump either without a coordinated changelog entry.
  • Other: keytar@7 (credentials), croner@10 (cron), radix-ui@1, [email protected]

Read the full file on GitHub · 231 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.

  1. 2mo ago First seen · 231 lines · 3,822 tokens per session scan A 63c3055c6445

Subscribe to this mod's changes

chamber copilot-instructions.md is an instructions file published in the GitHub repository ianphil/chamber (12 stars, last pushed 1mo ago), licensed MIT. It adds 3,822 tokens to every session, about $0.0153 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.

agentagent-harnessagent-osagenticai-agentai-agents
Related

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).

microsoft/vscode · 9,715 tokens

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.

vercel/next.js · 7,461 tokens

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).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

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).

microsoft/vscode · 2,731 tokens

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.

deepseek-ai/deepseek-harness · 4,261 tokens