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 compare-key-termsgit 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/compare-key-terms)<a href="https://agentmods.dev/skills/microsoft/cat-agent-skills/compare-key-terms"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/compare-key-terms/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/compare-key-terms"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/compare-key-terms.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 | $0.00153 | $0.02452 |
| Opus 5.5 | $0.00061 | $0.00981 |
| Sonnet 5.5 | $0.00031 | $0.00490 |
| Haiku 4.5 | $0.00015 | $0.00245 |
Grade A, and why
compare-key-terms 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 2d 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 — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compare key terms
Apply one consistent extraction schema across every document in scope and deliver the comparison in the medium the user selected. The output is a structured review aid — not a risk assessment, a legal opinion, or a substitute for verification against the source documents.
Required delivery decision
Before reading sources, defining the schema, or loading a file creation skill, determine whether the user explicitly selected the output medium. The medium defines the deliverable and the execution path; it is not a formatting preference and must not be inferred.
If the user already specified a choice, honour it and do not ask again. Otherwise your first action is a question card, whose first question is Where would you like the output delivered?, offering exactly, in this order: In Chat, As a Word Document, As an Excel. Do not mark any option recommended or default. Stop and wait. Words such as "compare", "extract", "grid", "table" or "summary" do not themselves select a delivery choice.
When NOT to Use
- Obligations, deadlines, notice periods and who must do what by when — use
extract-obligations-and-deadlines. - A document against a term sheet, heads of terms or other agreed commercial terms — out of scope for this skill.
- A document against legislation, a rulebook or an internal policy — use
identify-regulatory-gaps. - Comparing tracked changes between versions — use
summarize-redlines. - The same fields across jurisdictions rather than across documents — use
compare-across-jurisdictions. - Deriving standard positions and fallbacks from precedent — use
create-playbook. - Drafting, editing or redlining — use
edit-contract. - A spreadsheet with no legal extraction schema (a budget, a model, an ordinary tracker) — use Cowork's built-in Excel workbook creator.
- Legal advice, enforceability, market standard benchmarking, negotiation positions or risk scoring.
Hand-off rule. If a request, or part of one, matches an item above that names another skill, do
not do that part here — even when the documents are already open and the work looks quick. Name the
skill that handles it (for example, "That part is a job for extract-obligations-and-deadlines") and stop
that part; finish only what belongs to this skill. If the named skill is not installed, say so
plainly and do not attempt it here.
What ships with it
1 file 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.
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.
- 2d ago First seen · 158 lines · 153 tokens per session scan A d23a6cd0ab58
compare-key-terms is a skill published in the GitHub repository microsoft/cat-agent-skills (101 stars, last pushed yesterday), licensed MIT. It adds 153 tokens to every session and 2,452 once invoked, about $0.0006 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 2026-11-06.
compare-key-terms compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| compare-key-termsmicrosoft/cat-agent-skills | Skill | 101 | yesterday | MIT | A | 153 | Claude Code, Codex |
| mqc-chronicle-masterMiaoQichuan/new-litigation-visualization | Skill | 145 | 11d ago | AGPL-3.0 | A | 88 | Claude Code |
| liquidacao-planilha-bossmann007ThomasMoreAI/legal-skills-open | Skill | 100 | 27d ago | Apache-2.0 | A | 132 | Claude Code, Codex |
| ai-hive-after-death-official-checklistwubin1836/ai-hive-agent-skills | Skill | 23 | 28d ago | MIT | A | 121 | Codex |
| tabular-reviewstakwork/stakgraph | Skill | 113 | yesterday | none | A | 124 | Claude Code, Codex |
| przeglad-tabelarycznyiura-ai/IURA-Plugins | Skill | 10 | 3mo ago | Apache-2.0 | A | 284 | Claude Code |
| tabellarische-beoordelingiura-ai/IURA-Plugins | Skill | 10 | 3mo ago | Apache-2.0 | A | 187 | Claude Code |