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lsp-extract-function SKILL.md skillA

lsp-extract-function from blackwell-systems/agent-lsp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add blackwell-systems/agent-lsp/lsp-extract-function@git:20261104.5790d48

Pins git:20261104.5790d48 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: blackwell-systems/agent-lsp
Path: skills/lsp-extract-function/SKILL.md
Versions recorded: 6
Latest version: git:20261104.5790d48, committed Nov 4, 2026
First version recorded: Apr 21, 2026
Size: 8,117 bytes
Repository stars: 173
License: MIT

Extract a selected code block into a named function. Primary path uses the language server's extract-function code action; falls back to manual extraction when no code action is available. Validates captured variables, scope shadowing, and compilation after extraction.

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

> Requires the agent-lsp MCP server.

# lsp-extract-function: Extract Code Block into a Named Function

**This skill RESTRUCTURES existing code** — it takes code that already exists
and moves it into a new function. This is distinct from `/lsp-generate`, which
creates NEW code that does not yet exist (stubs, mocks, interface implementations).
Use this skill when the code is already written; use `/lsp-generate` when you
need to generate code from scratch.

**Invocation:** User provides `file_path` (absolute path), `start_line` and
`end_line` (1-indexed range), and `new_function_name` (desired name for the
extracted function).

---

## Prerequisites

If LSP is not yet initialized, call `mcp__agent-lsp__start_lsp` with the workspace
root first. Auto-inference applies when file paths are provided, but an explicit
start is required when switching workspaces.

---

## Step 1 — Get context (document symbols)

Call `mcp__agent-lsp__open_document` to open the file, then call
`mcp__agent-lsp__list_symbols` to understand the containing function and scope:

```
mcp__agent-lsp__open_document({ "file_path": "<file_path>" })
mcp__agent-lsp__list_symbols({ "file_path": "<file_path>" })
```
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add blackwell-systems/agent-lsp/lsp-extract-function@sha256:3e1277477d5c6e92

The line at the top of this page pins the label git:20261104.5790d48, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_ixhyw324xqqwc76k.svg)](https://markdownregistry.com/a/art_ixhyw324xqqwc76k)

5 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 6 versions of this file, between Apr 21, 2026 and Nov 4, 2026, about one every 39 days.

version	committed	commit	size	audit
git:20261104.5790d48 latest	2026-11-04	5790d48	8,117 B	A	view · diff
git:20260510.2c5eef2	2026-05-10	2c5eef2	7,967 B	A	view · diff
git:20260423.17e71a8	2026-04-23	17e71a8	8,000 B	A	view · diff
git:20260423.0c48c28	2026-04-23	0c48c28	7,979 B	A	view · diff
git:20260422.b42794c	2026-04-22	b42794c	7,850 B	A	view · diff
git:20260421.8c07e2d	2026-04-21	8c07e2d	7,747 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (8117 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

GitHub

blackwell-systems/agent-lsp · 173 stars · license MIT · pushed 2026-11-07 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ixhyw324xqqwc76k
GET https://markdownregistry.com/api/v1/resolve?ref=blackwell-systems/agent-lsp/lsp-extract-function
GET https://markdownregistry.com/api/v1/blob/3e1277477d5c6e9262a180b129f66b5e8d8092ec9bbc8270165d614c8369ac09

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.