microsoft/cat-agent-skills is a static website that catalogs reusable instruction sets and related packages for AI agents. People use it to search, filter, rate, and download skills for Cowork, Copilot Studio, and Scout, along with Copilot plugins and Scout automations. The catalogue entries are the skills, instructions, plugins, and settings displayed by the site.
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 microsoft/cat-agent-skills --skill copilot-studio-adaptive-card-buildergit clone --depth 1 https://github.com/microsoft/cat-agent-skillsWrote 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/microsoft/cat-agent-skills/copilot-studio-adaptive-card-builder)<a href="https://agentmods.dev/skills/microsoft/cat-agent-skills/copilot-studio-adaptive-card-builder"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/copilot-studio-adaptive-card-builder/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/microsoft/cat-agent-skills/copilot-studio-adaptive-card-builder"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/copilot-studio-adaptive-card-builder.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 | $0.00157 | $0.03022 |
| Opus 5.5 | $0.00063 | $0.01209 |
| Sonnet 5.5 | $0.00031 | $0.00604 |
| Haiku 4.5 | $0.00016 | $0.00302 |
Grade B, and why
copilot-studio-adaptive-card-builder scanned grade B with 1 finding 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.
Subtle steeringmediumPrompt injection
Instructions that bias recommendations or shape behaviour without the user noticing.
**Generative instructions do not dynamically render an Adaptive Card.** Produce artifacts that a maker can paste or configure in a standard-harness Copilot Studio card node. Never tell the user that adding JSON to agent How it starts
The opening of the file, as written. The whole thing — 305 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Studio Adaptive Card Builder
Create a complete maker-assistance package, not an isolated JSON block.
Non-negotiable platform boundary
The generated package is for Copilot Studio agents on the standard harness only. This skill may be invoked from a skills-capable GitHub Copilot harness, but Adaptive Cards and topic nodes are not supported there. Do not attempt to render or test the generated card in that same GitHub Copilot harness agent. Hand the package to a maker to configure and test in a standard-harness agent and its intended published channels.
Generative instructions do not dynamically render an Adaptive Card. Produce artifacts that a maker can paste or configure in a standard-harness Copilot Studio card node. Never tell the user that adding JSON to agent instructions makes a native card appear. Model-emitted JSON is normally displayed as text.
Use:
- Ask with Adaptive Card for interactive cards that collect input or submit an action.
- Message or Question for informational cards that do not submit.
- A Power Fx formula in the card node when the card must include dynamic topic, global, environment, or system values.
This skill does not publish an agent, edit a live Copilot Studio topic, guarantee rendering parity, replace authorization, or provide a complete Power Fx authoring framework.
Load supporting material only when needed
Read references/host-profiles-and-contracts.md when selecting a profile, template, output contract, or wiring pattern.
Read references/evals.md when evaluating this skill or checking an edge case.
Use the cards under assets/templates/ as known-good starting points. Adapt the smallest suitable template rather than drafting from scratch.
Use scripts/validate_cards.py for deterministic checks when Python execution is available. The script is a bounded semantic linter, not full official schema validation.
Workflow
What ships with it
18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/power-fx/status-progress.powerfx 890 B
- assets/sample-data/approval-decision.json 177 B
- assets/sample-data/request-intake.json 193 B
- assets/sample-data/status-progress.json 251 B
- assets/templates/approval-decision.json 2.1 KB
- assets/templates/choice-disambiguation.json 1.4 KB
- assets/templates/confirmation.json 1.7 KB
- assets/templates/data-collection-form.json 1.8 KB
- assets/templates/escalation-handoff.json 1.9 KB
- assets/templates/information-summary.json 798 B
- assets/templates/status-progress.json 930 B
- assets/templates/welcome-starter-prompts.json 1.3 KB
- metadata.json 548 B
- README.md 8.5 KB
- references/evals.md 13 KB
- references/host-profiles-and-contracts.md 21 KB
- scripts/tests/test_validate_cards.py 67 KB runs code
- scripts/validate_cards.py 56 KB runs code
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 · 305 lines · 157 tokens per session scan B 3fc0874081b4
copilot-studio-adaptive-card-builder is a skill published in the GitHub repository microsoft/cat-agent-skills (93 stars, last pushed today), licensed MIT. It adds 157 tokens to every session and 3,022 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it B with 1 finding (subtle steering). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-21.
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