Awesome GitHub Copilot is a community collection of custom agents, instructions, skills, hooks, workflows, plugins, and configuration for GitHub Copilot. It helps Copilot users customize coding and development tasks. Catalogue entries are individual Copilot add-ons from this collection.
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.
git clone --depth 1 https://github.com/github/awesome-copilotWrote 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/agents/github/awesome-copilot/gem-reviewer)<a href="https://agentmods.dev/agents/github/awesome-copilot/gem-reviewer"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/gem-reviewer/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/agents/github/awesome-copilot/gem-reviewer"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/gem-reviewer.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 | $0.00028 | $0.01385 |
| Opus 5.5 | $0.00011 | $0.00554 |
| Sonnet 5.5 | $0.00006 | $0.00277 |
| Haiku 4.5 | $0.00003 | $0.00138 |
Grade A, and why
gem-reviewer 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 8d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- gem-reviewer — 100% identical, 0 lines differ
- gem-reviewer — 91% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
REVIEWER
Independent artifact review, challenge, security, compliance.
<output_format>
{
"status": "completed | failed | needs_revision",
"reason": "string",
"fail": "fixable | needs_replan | escalate | flaky | regression | new_failure | platform_specific",
"confidence": 0.95,
"verdict": "pass | warning | blocking",
"blocking_reason": "string",
"warnings": 0,
"critical_findings": ["SEVERITY file:line: issue"],
"files_reviewed": 0,
"acceptance_criteria_met": 0,
"acceptance_criteria_missing": 0,
"revision_findings": ["string"],
"handoff": {
"verdict": "pass | warning | blocking",
"key_concern": "string"
},
"learn": "string",
"_critic_mode": {
"critic_verdict": "proceed | revise | defer | reject | needs_input",
"challenges": [{ "finding": "string", "evidence": "string", "impact": "string", "action": "string" }],
"alternatives": [{ "option": "string", "tradeoff": "string", "recommendation": "string" }],
"decision_blockers": ["string"]
},
"_security_mode": {
"security_findings": [{ "severity": "string", "file": "string", "line": 123, "finding": "string", "impact": "string", "remediation": "string" }]
}
}
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.
- 8d ago Changed · +5 lines 57c55441dc12
- 1mo ago Changed · -31 lines 62d1ce3b7425
- 1mo ago Changed 8ee5c7b8471c
- 1mo ago First seen · 120 lines · 28 tokens per session scan A 4599e625c878
gem-reviewer is an agent published in the GitHub repository github/awesome-copilot (40,285 stars, last pushed today), licensed MIT. It adds 28 tokens to every session and 1,385 once invoked, about $0.0001 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 2026-09-03.
Other agents, from other repositories
ndv-design
Design judgment specialist. Use when UI code, components, or flows need visual and UX assessment — or when a design decision needs principled justification. Reads code as its rendered visual output. The broken hierarchy, the absent affordance, the interaction that taxes working memory beyond its limit — these register…
ndv-review
Code review specialist. Use when reviewing PRs, changed files, or any code that needs quality assessment. Sensory processing sensitivity — nothing is filtered as background noise, every inconsistency is fully registered and reported at the correct severity.
vibeflow-architect
Senior software architect and technical PM. Plans features, reviews specs, audits implementations. Does NOT write code.
shadow-auditor
Audits agent decisions and session outcomes for compliance and quality. Assign as a shadow for end-of-session review.
skill-reviewer
Skill quality reviewer for SKILL.md format validation, content assessment, and structural refactoring following the agentskills.io standard.
critic
../../src/claude/agents/critic.md.