microsoft/github-constellation-software is a public collection of GitHub and GitHub Copilot resources for Constellation Software portfolio companies. It helps those companies migrate to GitHub, adopt and govern GitHub and Copilot, and participate in related training and support activities. The catalogue instruction provides guidance related to this resource hub.
Borrowing it
Nothing to install: this file belongs to microsoft/github-constellation-software. 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/microsoft/github-constellation-software/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/microsoft/github-constellation-softwareWrote 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/microsoft/github-constellation-software/copilot-instructions)<a href="https://agentmods.dev/instructions/microsoft/github-constellation-software/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/microsoft/github-constellation-software/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/microsoft/github-constellation-software/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/microsoft/github-constellation-software/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 | $0.01438 | $0.01438 |
| Opus 5.5 | $0.00575 | $0.00575 |
| Sonnet 5.5 | $0.00288 | $0.00288 |
| Haiku 4.5 | $0.00144 | $0.00144 |
Grade A, and why
github-constellation-software 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 12d 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 — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub @ CSI repository instructions
Commands
- Use Node.js 22, matching the GitHub Actions workflows.
- Install the locked dependencies with
npm ci. - Start the local Vite server with
npm run dev. - Validate the visual contract with
npm run design:lint. - Run the production validation with
npm run build. This runstsc --noEmitbefore the Vite multi-page build. - Run only the TypeScript check with
npm run typecheck. - Preview the generated
dist/artifact withnpm run preview. - No test runner or general source-lint script is currently configured, so
there is no single-test command.
design:lintvalidates onlyDESIGN.md. Do not invent test or lint commands; use the documented checks unless the repository adds a runner.
Architecture
This is a static, README-driven React site deployed to GitHub Pages.
DESIGN.mdis the project-specific visual contract. Read it before changing UI, CSS, layout, responsive behavior, or visual components. It is normative unless it conflicts with a Primer component API or accessibility guidance.- The canonical page content lives in five Markdown files:
README.md,build-days/README.md,ai-enablement/README.md,csi-pricing/README.md, andusage-based-billing/README.md. Keep them useful when viewed directly on GitHub; the Pages site enhances the same content rather than maintaining a separate copy. src/content.tsimports those READMEs with Vite's?rawloader and is the central registry for page IDs, routes, labels, descriptions, source paths, and table-of-contents extraction.- Each public route has its own HTML entry point. Its
<body>suppliesdata-pageanddata-site-root;src/App.tsxuses those values to select content and construct project-relative URLs. vite.config.tsdeclares every HTML entry underbuild.rollupOptions.input.base: './'is required so assets resolve under the/github-constellation-software/GitHub Pages project path.src/App.tsxis the shared Primer shell. It owns navigation, theme persistence, Markdown rendering, link/image normalization, heading anchors, tables of contents, and deep-link scrolling.src/main.tsxloads Primer primitives, Primer Markdown styles, and the repository-specific styles fromsrc/styles.css.- Pull requests run
.github/workflows/ci.yml; pushes tomainbuild and deploydist/through.github/workflows/deploy-pages.yml.
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.
- 12d ago Changed · +7 tokens per session 403189b5287a
- 2mo ago First seen · 118 lines · 1,431 tokens per session scan A cee5a05f4e0d
github-constellation-software copilot-instructions.md is an instructions file published in the GitHub repository microsoft/github-constellation-software (12 stars, last pushed 11d ago), licensed MIT. It adds 1,438 tokens to every session, about $0.0058 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.
github-constellation-software copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| github-constellation-software copilot-instructions.mdmicrosoft/github-constellation-software | Instructions file | 12 | 11d ago | MIT | A | 1,438 | GitHub Copilot |
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| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |