Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add trsdn/github-copilot-agent --skill copilot-compatibility-checkergit clone --depth 1 https://github.com/trsdn/github-copilot-agentWrote 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/skills/trsdn/github-copilot-agent/copilot-compatibility-checker)<a href="https://agentmods.dev/skills/trsdn/github-copilot-agent/copilot-compatibility-checker"><img src="https://agentmods.dev/badge/skills/trsdn/github-copilot-agent/copilot-compatibility-checker/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/skills/trsdn/github-copilot-agent/copilot-compatibility-checker"><img src="https://agentmods.dev/badge/skills/trsdn/github-copilot-agent/copilot-compatibility-checker.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 | $0.00042 | $0.02995 |
| Opus 5.5 | $0.00017 | $0.01198 |
| Sonnet 5.5 | $0.00008 | $0.00599 |
| Haiku 4.5 | $0.00004 | $0.00299 |
Grade A, and why
copilot-compatibility-checker 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 — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compatibility Checker
This skill helps diagnose and verify VS Code / GitHub Copilot feature compatibility based on version and settings.
When to use this skill
- User reports a feature isn't working
- Setting up experimental/preview features
- Checking if a feature is available in the user's VS Code version
- Diagnosing missing capabilities
Reference Sources
When diagnosing issues, consult these sources for the latest information:
VS Code Release Notes
- VS Code 1.108 Release Notes
- VS Code 1.107 Release Notes
- VS Code 1.106 Release Notes
- VS Code 1.105 Release Notes
- VS Code 1.104 Release Notes
- VS Code 1.103 Release Notes
- VS Code 1.102 Release Notes
- VS Code 1.99 Release Notes
- VS Code 1.95 Release Notes
- All VS Code Updates
Copilot Customization Documentation
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 · 283 lines · 42 tokens per session scan A 456a6f5f25f7
copilot-compatibility-checker is a skill published in the GitHub repository trsdn/github-copilot-agent (3 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 2,995 once invoked, about $0.0002 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.
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