mcp-migration SKILL.md skillA
mcp-migration from alpayc/mcp-migration-check is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add alpayc/mcp-migration-check/mcp-migration@git:20260904.9c01ea0Pins git:20260904.9c01ea0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- alpayc/mcp-migration-check
- Path
skill/mcp-migration/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260904.9c01ea0, committed Sep 4, 2026
- First version recorded
- Aug 27, 2026
- Size
- 10,653 bytes
- Repository stars
- 5
- License
- MIT
Diagnose and carry out the migration of an MCP server to the 2026-07-28 specification — the revision that made the transport stateless, formalized OAuth 2.1, and deprecated the logging, sampling, and roots capabilities. Use this skill whenever someone mentions migrating, upgrading, or checking an MCP server against the 2026-07-28 spec; asks whether their MCP server still works, is "ready", or will break; mentions the stateless transport model, Mcp-Session-Id, or OAuth 2.1 for MCP; or is…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# MCP 2026-07-28 migration The 2026-07-28 revision is a refactor, not a version bump. Six things this checker looks for break existing servers: 1. **The transport is stateless.** The `initialize`/`notifications/initialized` handshake and the `Mcp-Session-Id` header are gone from *this* revision. Every request carries its own protocol version and client capabilities in `_meta`. **This does not mean deleting the handshake.** A server "wishing to support both legacy clients … and modern clients **MAY** implement both behaviors" and picks its semantics from how each request opens — so the goal is to *add* the modern path, and retire the legacy one on the schedule your own clients dictate. Removing it for compliance breaks every v1 client for no gain. 2. **OAuth 2.1 is formalized** for remote servers: a protected MCP server acts as an OAuth 2.1 resource server and **MUST** implement RFC 9728 protected-resource metadata. 3. **`logging`, `sampling`, and `roots` are deprecated** — still functional, with a twelve-month minimum window, but new implementations should not adopt them. 4. **The TypeScript SDK moved to v2 under new package names.** …
Read the whole file at its exact version.
How to install
mdr add alpayc/mcp-migration-check/mcp-migration@sha256:5e95efa95fc2d249The line at the top of this page pins the label git:20260904.9c01ea0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_veghtwi2mnalfuri)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 27, 2026 and Sep 4, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260904.9c01ea0 latest | 2026-09-04 | 9c01ea0 | 10,653 B | A | view · diff |
| git:20260904.e1a432a | 2026-09-04 | e1a432a | 10,504 B | A | view · diff |
| git:20260828.08a3e25 | 2026-08-28 | 08a3e25 | 9,531 B | A | view · diff |
| git:20260828.6270b85 | 2026-08-28 | 6270b85 | 9,462 B | A | view · diff |
| git:20260827.5de427e | 2026-08-27 | 5de427e | 9,356 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10653 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
alpayc/mcp-migration-check · 5 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_veghtwi2mnalfuri GET https://markdownregistry.com/api/v1/resolve?ref=alpayc/mcp-migration-check/mcp-migration GET https://markdownregistry.com/api/v1/blob/5e95efa95fc2d249c019500a5214e3343027905266fa7f29a94e3e1ff27ae4fa
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.