docs(skills): collapse three overlapping skills trees into one verified tree

Three parallel trees documented the same ecosystem: omp-docs/skills/
(two overview pages), tools/npx-skills/ (10 pi-era npm pages), and
tools/vercel-labs-skills/ (11 CLI pages), plus a fourth leaderboard page
at engineering/skills-ecosystem.md. Verbatim overlap (identical SKILL.md
field tables in skills-spec.md vs skill-format.md; 13-agent vs 68-agent
copies of the same upstream table). Consolidated to four concept pages:

- skills/agent-skills.md: standard, format, loading, authoring (merges
  skills-spec, skill-format, skill-file-structure, skill-loading,
  best-practices, skills-vs-extensions)
- skills/skills-cli.md: CLI reference (merges commands, source-formats,
  installation-scope, skill-discovery, lock-file, env-variables,
  agent-support, related-links)
- skills/store-wiring.md: moved, fleet ops, links retargeted
- skills/ecosystem.md: replaces skills-ecosystem.md; stale 2026-08-12
  top-50 table dropped, replaced with a live top-10 re-queried from the
  skills.sh API tonight and the API contract re-verified (zero-based,
  200/page, {skills,total,hasMore,page}, total 9909)

All facts re-verified 2026-10-19 against primary sources:
agentskills.io, vercel-labs/skills README + src/cli.ts (command set,
--full-depth) + src/skill-lock.ts (v3 lock, XDG path, wipe-on-old),
live skills.sh API. Deleted superseded core/index-doc.md (old pi-era
docs index). Retargeted all inbound links (tools/index, engineering x3,
packages x3, pi/skills, core/index). Pi-era npm skill packaging is
listed as archived under /pi/.

Refs #29
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## See Also
* [SDLC and Tooling](sdlc.md)
* [Skills Ecosystem](skills-ecosystem.md)
* [Skills Ecosystem](/skills/ecosystem.md)
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* [Language and Framework Stacks](languages/index.md) - Node/JavaScript, React, Python, Rust, Go.
* [Infrastructure and Cloud](infra/index.md) - Terraform/OpenTofu, containers, Kubernetes, AWS, DigitalOcean, Hetzner.
* [Pi Plugins](plugins.md) - The pi extension ecosystem and notable packages.
* [Skills Ecosystem](skills-ecosystem.md) - skills.sh registry and the top skills.
* [Skills Ecosystem](/skills/ecosystem.md) - skills.sh registry and the live install leaderboard.
* [Signal Remote Control](signal-remote.md) - Drive a pi instance from Signal messages.
## Conventions
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## Related Ecosystem
Pi implements the open Agent Skills standard. This makes pi skills compatible with Claude Code, Codex CLI, Amp, Droid, Cursor, and many other agents. See the [Skills Ecosystem](skills-ecosystem.md) page.
Pi implements the open Agent Skills standard. This makes pi skills compatible with Claude Code, Codex CLI, Amp, Droid, Cursor, and many other agents. See the [Skills Ecosystem](/skills/ecosystem.md) page.
## Citations
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---
type: reference
title: Skills Ecosystem and Top Skills
description: The skills.sh registry, the Agent Skills ecosystem, and the verified top 50 skills by installs.
tags:
- skills
- skills-sh
- agent-skills
- ecosystem
- engineering
- unverified
---
verified: 2026-08-28
# Skills Ecosystem and Top Skills
This page covers the open agent skills ecosystem. It describes the registries, the install tooling, and the top skills by category.
## The Ecosystem
`skills.sh` is the primary registry and leaderboard for agent skills. It runs on the open-source `skills` CLI from Vercel Labs. Use these commands:
```bash
npx skills add <owner/repo> # Install skills
npx skills find [query] # Search skills
npx skills list # List installed skills
```
The underlying standard is the Agent Skills specification at [agentskills.io](https://agentskills.io). Over 20 coding agents support it. A single `SKILL.md` works across these agents.
Related registries:
| Registry | Focus |
|----------|-------|
| skills.sh | Primary registry and leaderboard. |
| agentskill.sh | Directory and marketplace with many indexed skills. |
| officialskills.sh | Verified skills from major organizations. |
| qaskills.sh | QA and testing skills. |
Use the local `npx skills` command to explore what is available. You can query the leaderboard data directly at `GET /api/skills/all-time/{page}` on skills.sh. The page index is zero-based and returns 200 skills per page.
## Top 50 Skills by All-Time Installs
The table lists the top 50 skills verified from the live skills.sh API on 2026-08-12. Install counts are exact at query time.
| # | Skill | Source | Installs |
|----|-------|--------|----------|
| 1 | `find-skills` | vercel-labs/skills | 2,918,155 |
| 2 | `grill-me` | mattpocock/skills | 832,797 |
| 3 | `frontend-design` | anthropics/skills | 767,871 |
| 4 | `grill-with-docs` | mattpocock/skills | 708,703 |
| 5 | `improve-codebase-architecture` | mattpocock/skills | 683,652 |
| 6 | `tdd` | mattpocock/skills | 660,660 |
| 7 | `agent-browser` | vercel-labs/agent-browser | 659,465 |
| 8 | `vercel-react-best-practices` | vercel-labs/agent-skills | 625,739 |
| 9 | `setup-matt-pocock-skills` | mattpocock/skills | 607,703 |
| 10 | `handoff` | mattpocock/skills | 570,592 |
| 11 | `triage` | mattpocock/skills | 568,784 |
| 12 | `lark-doc` | open.feishu.cn | 561,794 |
| 13 | `lark-approval` | open.feishu.cn | 561,758 |
| 14 | `lark-base` | open.feishu.cn | 561,634 |
| 15 | `lark-drive` | open.feishu.cn | 561,452 |
| 16 | `lark-shared` | open.feishu.cn | 561,337 |
| 17 | `lark-calendar` | open.feishu.cn | 561,273 |
| 18 | `lark-im` | open.feishu.cn | 561,248 |
| 19 | `lark-contact` | open.feishu.cn | 561,157 |
| 20 | `lark-sheets` | open.feishu.cn | 561,006 |
| 21 | `lark-wiki` | open.feishu.cn | 560,924 |
| 22 | `lark-attendance` | open.feishu.cn | 560,891 |
| 23 | `lark-event` | open.feishu.cn | 560,888 |
| 24 | `lark-minutes` | open.feishu.cn | 560,818 |
| 25 | `lark-openapi-explorer` | open.feishu.cn | 560,777 |
| 26 | `lark-whiteboard` | open.feishu.cn | 560,768 |
| 27 | `lark-mail` | open.feishu.cn | 560,720 |
| 28 | `lark-task` | open.feishu.cn | 560,692 |
| 29 | `lark-slides` | open.feishu.cn | 560,590 |
| 30 | `lark-skill-maker` | open.feishu.cn | 560,554 |
| 31 | `lark-vc` | open.feishu.cn | 560,466 |
| 32 | `lark-workflow-meeting-summary` | open.feishu.cn | 560,368 |
| 33 | `lark-workflow-standup-report` | open.feishu.cn | 560,358 |
| 34 | `prototype` | mattpocock/skills | 556,403 |
| 35 | `lark-okr` | open.feishu.cn | 541,430 |
| 36 | `web-design-guidelines` | vercel-labs/agent-skills | 535,426 |
| 37 | `lark-markdown` | open.feishu.cn | 526,555 |
| 38 | `microsoft-foundry` | microsoft/azure-skills | 523,287 |
| 39 | `azure-diagnostics` | microsoft/azure-skills | 518,052 |
| 40 | `azure-ai` | microsoft/azure-skills | 517,867 |
| 41 | `azure-deploy` | microsoft/azure-skills | 517,694 |
| 42 | `azure-prepare` | microsoft/azure-skills | 517,512 |
| 43 | `azure-validate` | microsoft/azure-skills | 517,228 |
| 44 | `azure-storage` | microsoft/azure-skills | 516,821 |
| 45 | `entra-app-registration` | microsoft/azure-skills | 516,567 |
| 46 | `appinsights-instrumentation` | microsoft/azure-skills | 516,335 |
| 47 | `azure-resource-lookup` | microsoft/azure-skills | 516,249 |
| 48 | `azure-compliance` | microsoft/azure-skills | 516,198 |
| 49 | `azure-aigateway` | microsoft/azure-skills | 516,058 |
| 50 | `azure-kusto` | microsoft/azure-skills | 515,980 |
## Notable Categories
The top 50 breaks down into these groups:
* Development workflow: find-skills, grill-me, tdd, handoff, triage, prototype.
* Design and frontend: frontend-design, vercel-react-best-practices, web-design-guidelines.
* Lark office suite: 22 skills from open.feishu.cn, roughly ranks 12-35.
* Azure infrastructure: 13 skills from microsoft/azure-skills, ranks 38-50.
* Agent orchestration: agent-browser, setup-matt-pocock-skills.
`find-skills` leads by a wide margin with 2.9 million installs. The Lark suite and Azure suite dominate the middle of the list.
## SKILL.md Format
A skill is a directory that contains a `SKILL.md` file:
```yaml
---
name: my-skill
description: What this skill does
---
```
The `name` field is required and lowercase. The `description` field is required. Skills load progressively: discovery loads only the metadata, activation loads the full file on match.
## 2025/2026 Trends
* The Agent Skills spec is the common standard across 20+ agents.
* Skills are write once, use everywhere.
* Registries add security audits for skill content.
* Specialized registries, such as QA, are emerging.
## Citations
* [skills.sh](https://skills.sh)
* [skills.sh API `/api/skills/all-time/0`](https://skills.sh/api/skills/all-time/0)
* [vercel-labs/skills](https://github.com/vercel-labs/skills)
* [vercel-labs/agent-skills](https://github.com/vercel-labs/agent-skills)
* [agentskills.io](https://agentskills.io)
* [openai/skills](https://github.com/openai/skills)
## See Also
* [Agent Instruction Files](agents-files.md)
* [Pi Plugins](plugins.md)
* [Skills Documentation](../skills/index.md)