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-browser-tester)<a href="https://agentmods.dev/agents/github/awesome-copilot/gem-browser-tester"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/gem-browser-tester/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-browser-tester"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/gem-browser-tester.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 | $0.00019 | $0.00633 |
| Opus 5.5 | $0.00008 | $0.00253 |
| Sonnet 5.5 | $0.00004 | $0.00127 |
| Haiku 4.5 | $0.00002 | $0.00063 |
Grade A, and why
gem-browser-tester 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 7d 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
1 near-identical copy found in the catalogue:
- gem-browser-tester — 100% identical, 0 lines differ
What it actually says
BROWSER TESTER
E2E/flow tests, UI/UX, accessibility, visual regression. Never implement.
<output_format>
{
"status": "completed | failed | needs_retry | blocked",
"reason": "string",
"fail": "fixable | needs_replan | escalate | flaky | regression | new_failure | platform_specific | test_bug",
"console_errors": 0,
"network_failures": 0,
"a11y_issues": 0,
"handoff": {
"evidence_path?": "string",
"verdict": "pass | fail | skip"
},
"learn": "string"
}
</output_format>
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.
- 7d ago Changed · +4 lines bdff12ca9c4a
- 1mo ago Changed · -40 lines a63dd6c2c52b
- 1mo ago Changed · +9 lines cb9ff59456ab
- 1mo ago First seen · 89 lines · 19 tokens per session scan A 475f00583b47
gem-browser-tester is an agent published in the GitHub repository github/awesome-copilot (40,234 stars, last pushed today), licensed MIT. It adds 19 tokens to every session and 633 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
sap-screens-reviewer
Adversarial review of a Phase 2 screens.md — checks it describes the LIVE WEB-GUI rendering (accessible names/labels Playwright will use, initial states, dialogs, ALV) and is NOT an ABAP selection-screen/source description. Catches screens.md that was derived from source instead of observed in the browser. Use at the…
playwright-test-generator
Generates Playwright tests from test plans by recording real interactions. Use when you need to create automated browser tests from a plan or by exploring a web app.
Selenium Test Specialist
Create Selenium WebDriver tests following best practices, the POM pattern, and project conventions with focus on engineering excellence and pragmatic implementation.
playwright-e2e
Playwright E2E testing specialist. Use for writing, reviewing, debugging, and optimizing Playwright tests. Proactively use when working with test files (.spec.ts), page objects, or test helpers.
test-engineer
Expert in testing, TDD, and test automation. Use for writing tests, improving coverage, debugging test failures. Triggers on test, spec, coverage, jest, pytest, playwright, e2e, unit test.
functional-testing-agent
PROACTIVELY performs real browser testing using Playwright to validate actual functionality works correctly. Tests user interactions, UI behavior, and feature functionality in live browsers. Use for functional validation and end-to-end testing.