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 build-case-chronologygit 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/build-case-chronology)<a href="https://agentmods.dev/skills/microsoft/cat-agent-skills/build-case-chronology"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/build-case-chronology/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/build-case-chronology"><img src="https://agentmods.dev/badge/skills/microsoft/cat-agent-skills/build-case-chronology.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 | $0.00166 | $0.03060 |
| Opus 5.5 | $0.00066 | $0.01224 |
| Sonnet 5.5 | $0.00033 | $0.00612 |
| Haiku 4.5 | $0.00017 | $0.00306 |
Grade A, and why
build-case-chronology 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 — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Build case chronology
Order supplied case materials into a neutral, fully cited timeline of events, with every entry traceable to a named document and pinpoint. The chronology is a working document for counsel review, not legal advice.
When NOT to Use
- A view on liability, merits, quantum, limitation or prospects — decline the
evaluative part and use
legal-reasoning; the chronology itself is still available. - Contractual obligations, deadlines and consequences taken from an agreement —
use
extract-obligations-and-deadlines. - Activity across matters drawn from email, Teams and calendar — use
summarize-legal-matters. - Drafting pleadings, statements, submissions or correspondence — use
edit-contractor Cowork's built-in Word document creator. - A general summary or explanation of one document — use
legal-reasoningorexplain-legal-concepts. - Disclosure, privilege review or redaction passes — distinct workflows with their own controls.
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 legal-reasoning") 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.
Step 1: Required delivery decision
The output medium defines the deliverable and must not be inferred. If the user already stated one, honor it. Otherwise your first action is a question card, whose first question is Where would you like the output delivered? offering In chat, As a Word document, As an Excel workbook, and Another file format (type it below). Stop and wait; do not read sources or build anything first. Words such as "build", "prepare", "chronology" or "timeline" do not themselves select a medium. If a requested format cannot be produced and validated by an available path, explain and offer the supported ones.
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 · 231 lines · 166 tokens per session scan A b0bd6c332fd9
build-case-chronology is a skill published in the GitHub repository microsoft/cat-agent-skills (101 stars, last pushed yesterday), licensed MIT. It adds 166 tokens to every session and 3,060 once invoked, about $0.0007 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.
build-case-chronology compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| build-case-chronologymicrosoft/cat-agent-skills | Skill | 101 | yesterday | MIT | A | 166 | Claude Code, Codex |
| fto-triageanthropics/claude-for-legal | Skill | 9.9k | yesterday | Apache-2.0 | A | 81 | Claude Code |
| legal-holdanthropics/claude-for-legal | Skill | 9.9k | yesterday | Apache-2.0 | A | 68 | Claude Code |
| specification-writingwanshuiyin/Auto-claude-code-research-in-sleep | Skill | 19k | today | MIT | A | 49 | Claude Code |
| regulatory-research-fallbackHKUDS/OpenSpace | Skill | 7.9k | 2d ago | MIT | A | 20 | Claude Code, Codex |
| terms-of-servicegenspark-ai/genoffice | Skill | 12k | today | Apache-2.0 | A | 32 | Claude Code, Codex |
| x-scorecardx-cmd/x-cmd | Skill | 4.7k | 8d ago | Apache-2.0 | A | 57 | Claude Code, Codex |