writing-extensions SKILL.md skillA
writing-extensions from gerritcodereview/gerrit-mcp-server is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gerritcodereview/gerrit-mcp-server/writing-extensions@git:20260811.def7665Pins git:20260811.def7665 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gerritcodereview/gerrit-mcp-server
- Path
.claude/skills/writing-extensions/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260811.c6b13b1, committed Aug 11, 2026
- First version recorded
- Aug 11, 2026
- Size
- 13,999 bytes
- Repository stars
- 22
- License
- Apache-2.0
Guide for authoring a new in-process MCP tool extension for gerrit-mcp-server. Use when a user wants to add new Gerrit tools, port a standalone plugin MCP server into the extension framework, or needs a worked example of the ExtensionContext API.
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
# Writing a gerrit-mcp-server Extension Extensions register new MCP tools inside the running `gerrit-mcp-server` process via the `gerrit_mcp_server.extensions` entry-point group. They share the server's auth, config, and HTTP machinery through the stable `ExtensionContext` API. ## 1. Package layout Each extension is a standalone Python package: ``` myext/ ├── __init__.py # empty ├── extension.py # defines register(ctx) └── pyproject.toml # declares the entry point ``` This is a flat layout (package files alongside `pyproject.toml` rather than in a `src/myext/` subdirectory). It requires an explicit `package-dir` in `pyproject.toml` — see [section 8](#8_entry_point-declaration). Without it, setuptools looks for a `./myext/` subdirectory and the build fails with `package directory 'myext' does not exist`. If the extension is a workspace member of a uv workspace, it lives at the repo root alongside other workspace members. ## 2. The `register(ctx)` contract `extension.py` must export a top-level `register(ctx: ExtensionContext) -> None`. The server calls it once at startup. ```python from gerrit_mcp_server.extensions import ExtensionContext …
Read the whole file at its exact version.
How to install
mdr add gerritcodereview/gerrit-mcp-server/writing-extensions@sha256:37492a246ea5961bThe line at the top of this page pins the label git:20260811.def7665, 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_6w3pboxuizef4kl2)
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Versions
The registry has recorded 2 versions of this file, all committed on Aug 11, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260811.c6b13b1 latest | 2026-08-11 | c6b13b1 | 13,999 B | A | view · diff |
| git:20260811.def7665 | 2026-08-11 | def7665 | 14,467 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 (13999 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
gerritcodereview/gerrit-mcp-server · 22 stars · license Apache-2.0 · pushed 2026-11-07 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_6w3pboxuizef4kl2 GET https://markdownregistry.com/api/v1/resolve?ref=gerritcodereview/gerrit-mcp-server/writing-extensions GET https://markdownregistry.com/api/v1/blob/37492a246ea5961bc5a64f505262eec673d09a2aec0d90fb5935c24b2d2fcede
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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.