What this read moved
1–4 of 4community/working-groups/filesystems Changed · +3 / -2 lines
from line 47
4747
4848* **File Uploads WG.** Both groups transfer content to a server. Coordination needed on where an upload-oriented flow
4949 ends and a resource write operation begins.
50* **Skills Over MCP WG.** Filesystem dependency, including questions about write access, was an agenda item at the
51 office hours of 24 March 2026 and remains open.
50* **[Skills Over MCP WG](/community/working-groups/skills-over-mcp).** The published
51 [Skills extension](/extensions/skills/overview) uses Resources for file reads and defines optional directory reading.
52 It does not depend on filesystem write operations; coordinate on future resource operations that affect skills.
5253* **Agents WG.** Multi-agent and job orchestration systems are the motivating consumers of a shared write path.
5354
5455## Leadership
community/working-groups/skills-over-mcp Changed · +30 / -21 lines
### Completed Milestones ### Current Work ### Active Work Items
from line 15
1515which raised open questions about whether existing MCP primitives suffice or what
1616conventions to standardize. The WG produces specification extensions, reference
1717implementations, and coordination artifacts because solutions touch the protocol spec,
18registry schema, SDK implementations, and client behavior. The WG's current direction
19is captured in [SEP-2640 — Skills Extension](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2640)
20(Resources-based, Extensions Track).
18registry schema, SDK implementations, and client behavior.
2119
20[SEP-2640 — Skills Extension](/seps/2640-skills-extension) is Final. The WG maintains
21the official [Skills extension](/extensions/skills/overview)
22(`io.modelcontextprotocol/skills`) in
23[modelcontextprotocol/ext-skills](https://github.com/modelcontextprotocol/ext-skills).
24Current work focuses on implementation support, interoperability, and evolution
25of the published extension.
26
2227## Scope
2328
2429### In Scope
2530
26* **Specification Work**: SEPs defining how skills are represented, discovered, and
27 consumed within MCP — including the Skills Extension (Extensions Track) and related
28 protocol changes
31* **Specification Work**: Maintain and evolve the Skills extension, with changes
32 tracked in the [decision log](https://github.com/modelcontextprotocol/ext-skills/blob/main/docs/decisions.md);
33 propose related core protocol changes through the SEP process
2934* **Reference Implementations**: SDK components and reference servers demonstrating
3035 skill discovery and consumption patterns
3136* **Cross-Cutting Concerns**: Coordination with Registry WG (skills discovery/distribution,
3237 registry schema changes), Agents WG (skill activation, server metadata consumption),
33 Primitive Grouping WG (progressive disclosure patterns), and external projects including
38 Primitive Grouping IG (progressive disclosure patterns), and external projects including
3439 the [Agent Skills](https://agentskills.io/) spec (content format and well-known URI
3540 discovery), FastMCP, and PydanticAI
3641* **Documentation**: Specification sections and guidance covering skill authoring,
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5055
5156* **Agents WG** — How agents consume server metadata, skill activation
5257* **Registry WG** — Skills discovery/distribution, registry schema changes
53* **Primitive Grouping WG** — Progressive disclosure patterns
58* **Primitive Grouping IG** — Progressive disclosure patterns
5459
5560## Leadership
5661
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109114
110115## Resources
111116
112* Experimental findings and reference implementations: [modelcontextprotocol/experimental-ext-skills](https://github.com/modelcontextprotocol/experimental-ext-skills)
113* Project board: [Skills Over MCP WG](https://github.com/orgs/modelcontextprotocol/projects/38/views/1)
117* [Skills extension overview](/extensions/skills/overview) and [Final SEP-2640](/seps/2640-skills-extension)
118* Specification and WG documents: [modelcontextprotocol/ext-skills](https://github.com/modelcontextprotocol/ext-skills)
119* [Implementations](https://github.com/modelcontextprotocol/ext-skills/blob/main/docs/implementations.md) and [client support](/extensions/client-matrix)
120* [Decision log](https://github.com/modelcontextprotocol/ext-skills/blob/main/docs/decisions.md) and [archived design work](https://github.com/modelcontextprotocol/ext-skills/tree/main/docs/archive)
114121
115122## Deliverables & Success Metrics
116123
117### Active Work Items
124### Completed Milestones
118125
119Full live tracking is on the [Skills Over MCP WG project board](https://github.com/orgs/modelcontextprotocol/projects/38/views/1). Headline workstreams:
126* [SEP-2640](/seps/2640-skills-extension) is **Final**, merged on September 13, 2026.
127* The official specification is published in [ext-skills](https://github.com/modelcontextprotocol/ext-skills/blob/main/specification/stable/skills.mdx), with a [website overview](/extensions/skills/overview).
128* [Skills conformance scenarios](https://github.com/modelcontextprotocol/conformance/pull/330) were merged on September 11, 2026.
120129
121| Item | Status | Target Date | Champion |
122| ----------------------------------------------------------------------------------------------------------------- | ----------- | ----------- | -------------------------------------------------------------------------------------------- |
123| [Skills Extension SEP](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2640) (Extensions Track) | In Review | | [@pja-ant](https://github.com/pja-ant) |
124| Skills Extension reference implementation | In Review | | [@olaservo](https://github.com/olaservo) |
125| Agent Skills spec coordination | In Progress | | [@jonathanhefner](https://github.com/jonathanhefner), [@pja-ant](https://github.com/pja-ant) |
126| Registry skills.json proposal | In Progress | | [@JAORMX](https://github.com/JAORMX) |
130### Current Work
127131
132Track proposals, implementation work, and coordination in
133[ext-skills issues](https://github.com/modelcontextprotocol/ext-skills/issues),
134with links to SDK or client issues where the implementation lives.
135Owners, progress, and priorities are maintained there rather than in this charter.
136
128137### Success Criteria
129138
130* **Short-term**: Documented consensus on requirements and evaluation of existing approaches
131* **Medium-term**: Clear recommendation (convention vs. protocol extension vs. both) — the draft Skills Extension SEP represents the WG's current direction: a formal extension using existing Resources primitives
132* **Long-term**: Interoperable skill distribution across MCP servers and clients
139* **Specification**: A published Resources-based Skills extension — achieved with Final SEP-2640.
140* **Implementation**: SDK and host implementations that pass the applicable conformance scenarios.
141* **Interoperability**: Independent MCP servers and clients that discover and load skills consistently.
133142
134143## Changelog
135144
extensions/skills/overview Changed · +8 / -1 lines
from line 3
33> Discover and read Agent Skills from MCP servers
44
55The [ext-skills repository](https://github.com/modelcontextprotocol/ext-skills)
6contains the specification for Skills over MCP.
6contains the published specification for the official Skills extension
7(`io.modelcontextprotocol/skills`). [SEP-2640](/seps/2640-skills-extension) is Final.
8
9The [Skills Over MCP Working Group](/community/working-groups/skills-over-mcp)
10maintains the extension. SDK and host support is still being implemented;
11see the [client support matrix](/extensions/client-matrix) and
12[implementations list](https://github.com/modelcontextprotocol/ext-skills/blob/main/docs/implementations.md)
13for current coverage.
714
815<Card title="modelcontextprotocol/ext-skills" icon="github" href="https://github.com/modelcontextprotocol/ext-skills">
916 Specification and documentation for Skills over MCP.
community/interest-groups/primitive-grouping Changed · +2 / -2 lines
from line 26
2626### Related Groups
2727
2828* **[Tool Annotations IG](/community/interest-groups/tool-annotations)** - annotation-based filtering and selection of primitives intersects with how primitives are organized and surfaced
29* **[Skills Over MCP WG](/community/working-groups/skills-over-mcp)** - the MCP-and-Skills effort is evaluating how capabilities are discovered and organized, which overlaps with grouping
29* **[Skills Over MCP WG](/community/working-groups/skills-over-mcp)** - maintains the published [Skills extension](/extensions/skills/overview); skill discovery and progressive disclosure overlap with grouping
3030* **[Registry WG](/community/working-groups/registry)** - organizing MCP servers (beyond this group's mandate) is evaluated here
3131* **[Security IG](/community/interest-groups/security)** - organizing and disclosing primitives by privilege level is a security concern outside this group's scope
3232
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4343**Beyond Scope**
4444
4545* **Organization for security** - organizing and disclosing primitives to clients based on their privilege level is an important problem but beyond this group's mandate
46* **Organizing MCP servers** - the MCP Registry and MCP-and-Skills groups are evaluating how different servers should be organized to improve the client experience
46* **Organizing MCP servers** - server discovery and registry schema decisions belong to the [Registry WG](/community/working-groups/registry), with skill-distribution requirements contributed by the Skills Over MCP WG
4747
4848## Goals
4949