5adfff5952* docs: point README and AGENTS.md at the released spec and official docs SEP-2640 is Final and the extension ships from specification/stable/skills.mdx, so the README now leads with a Specification section linking the spec file, the official docs page (modelcontextprotocol.io/extensions/skills/overview), the published SEP, and the client matrix. The experimental banner is replaced with a note that docs/ holds working documents; the charter, pulls, and issues links move off the redirecting experimental-ext-skills / charter URLs. AGENTS.md no longer names the SEP PR as the source of truth; it points agents at the stable spec page and describes the decision-log flow against that file. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: accepted spec changes land in a draft revision, not the stable file The stable specification is a released snapshot. README and AGENTS.md now say accepted decision-log proposals go into a draft revision that ships as a new release, matching the ext-tasks specification layout. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: move pre-release design documents to docs/archive SEP-2640 is Final, so docs/ now holds only living working documents. Eight historical documents move to docs/archive with an index explaining what each was and what superseded it: the SEP baseline copy, why-and-when, use-cases, approaches, skill-uri-scheme, glossary, client-mcp-support (superseded by the official client matrix), and agent-plugins-analysis. Files the published SEP links to by path (decisions, experimental-findings, open-questions, problem-statement, rationale, related-work, skill-meta-keys) stay in place so those links keep working. Cross-links are rewritten and verified; the README contents table is trimmed to match. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: archive open-questions and skill-meta-keys Both are pre-release documents whose outcomes live in the decision log and the specification. The published SEP links to them by path; a companion change in modelcontextprotocol/modelcontextprotocol repoints those links. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: fix sibling links inside archived open-questions and skill-meta-keys Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: keep only the decision log and rationale in docs/ threat-model, experimental-findings, findings-template, problem-statement, and related-work move to docs/archive with index rows. The candidates tracker and the archived client-support survey are removed in favor of the official extension client matrix, and links to them are repointed there. README drops the Why and Problem Statement sections, which duplicate the SEP's Motivation and the official overview page. CONTRIBUTING routes new implementation findings to GitHub issues. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: fix sibling links inside newly archived documents Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: add a concise implementations list One table each for servers/SDKs and hosts, one line per entry, replacing the retired candidates tracker and the related-work implementation tables. Seeded from those plus PR #141 and issue #144. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: put tracking links in the Status column of the implementations list Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: add a vendor/community category to the implementations list Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: replace the interim reference package with the TypeScript SDK row The @olaservo/ext-skills package is retired in favor of first-class skills APIs in the TypeScript SDK (typescript-sdk#2798, phase 1 in #2818). The archived related-work page now points at implementations.md for current information. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: drop pre-SEP rows from the implementations list They are already recorded in the archived related-work page; the list now points there instead. FastMCP stays because its row tracks the migration to v1. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: add official SDK progress, Tachyon, and Inspector 2.6.0 to implementations From the WG Discord channel and the SDK repos as of 2026-09-15: Go, TypeScript, Python, and C# SDKs all have open SEP-2640 PRs (Go passes conformance); the conformance suite merged; Inspector 2.6.0 shipped skills verification; Tachyon reports a server implementation. Adds an "in progress" status for open PRs. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: track Goose host support via the official issue Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: only tag community rows in the implementations list Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: tag MCP-project rows as official in the implementations list Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: split the implementations list into SDKs, servers, and hosts Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * docs: add MCPJam Inspector to hosts Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * Revise implementations table format and content Updated the implementations table to include language and status columns. Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * Correct links and clarify documentation references Updated links to SEP-2640 and clarified document references. Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com> Co-authored-by: Sambhav Kothari <sambhavs.email@gmail.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Skills Over MCP Working Group
This repository is the home of the official Model Context Protocol Skills extension (io.modelcontextprotocol/skills), based on SEP-2640, and of the Skills Over MCP Working Group's working documents.
Specification
| Resource | Where |
|---|---|
| Specification (source of truth) | specification/stable/skills.mdx — the extension spec, written against base protocol revision 2026-07-28 |
| Official documentation | modelcontextprotocol.io/extensions/skills/overview — condensed overview with examples and message flow |
| SEP-2640: Skills Extension | modelcontextprotocol.io/seps/2640-skills-extension — the accepted SEP (Status: Final; PR #2640 merged 2026-09-13) |
| Client support | Extension client matrix — which clients implement the extension |
The stable specification is a released snapshot and is not edited in place. Changes are proposed as dated entries in the decision log (see AGENTS.md for the process) and, once accepted, land in a draft revision of the specification that ships as a new release.
ℹ️ The
docs/folder holds the decision log, the design rationale, and the implementations list. Earlier design documents, findings, and trackers are frozen indocs/archive/. None of it is part of the specification.
Charter: modelcontextprotocol.io/community/working-groups/skills-over-mcp — mission, scope, membership, active work items, and success criteria. Project board: Skills Over MCP WG Meeting notes: Skills Over MCP WG discussions Discord: #skills-over-mcp-wg Open work: Pull requests and issues — proposals, decisions, implementations, and other in-flight contributions welcome.
Repository Contents
| Document | Description |
|---|---|
| Specification | The Skills extension specification (io.modelcontextprotocol/skills) — source of truth |
| Decision Log | ADR-lite record of the group's decisions, and the vehicle for proposing changes to the specification |
| Rationale | Design rationale for the Resources-based extension |
| Implementations | Servers, SDKs, and hosts that serve or consume skills over MCP |
| Archive | Pre-release design documents, findings, and trackers, frozen when SEP-2640 was marked Final |
For the case for serving skills over MCP, see the official overview and the Motivation section of SEP-2640.
Contributing
See CONTRIBUTING.md for how to participate.