rust-lsp

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This skill MUST be used for semantic Rust navigation and analysis: resolving definitions across crate boundaries, finding all references to a symbol, inspecting inferred types or trait implementations, searching symbols by name, and renaming symbols safely. SHOULD be preferred over grep or file reads whenever the task requires Rust-aware understanding.

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Sourcefedemagnani/rust-lsp-plugin

Added on2026-04-24

NPX Install

npx skill4agent add fedemagnani/rust-lsp-plugin rust-lsp

SKILL.md Content

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Rust Analyzer Agent Skill

When to use

MUST use the MCP tools when the task involves:

Resolving where a symbol is defined, including across crate boundaries
Finding all references to a function, type, field, or trait method
Inspecting type signatures, inferred types, or trait implementations
Searching for symbols by name across a workspace
Renaming a symbol across all usage sites

SHOULD prefer the MCP tools over grep or file reads when the task requires Rust-aware semantic understanding (scoping, imports, trait dispatch, macro expansion).

Fall back to grep or file reads when the task is not Rust-specific, targets string literals or comments, or covers files outside the Rust compilation.

Installation

If the Rust LSP tools are not available yet, run

scripts/install.sh

from this skill before using the MCP tools. Treat the tools as "not available yet" whenever the current session does not expose the Rust LSP MCP tool APIs: attempt the install/setup path first, then verify whether the tools become usable.

Common workflows

Navigate to a definition

```
definitions
```
at the symbol position
Read the target file at the returned location

Find all callers

```
references
```
at the function name position
Review the returned locations

Inspect a type

```
hover
```
at the position — returns the resolved type even for inferred types, trait objects, and generic instantiations

Find a symbol by name

```
workspace_symbols
```
with the name as query
Read the returned location if needed

Rename a symbol safely

```
open_document
```
with the file contents
```
rename_symbol
```
at the position with the new name
Apply the returned workspace edits to disk
```
close_document
```
when done

Update in-memory content for analysis

Position-based tools work on saved files without

open_document

. Use the document lifecycle only when analyzing unsaved or in-memory content:

```
open_document
```
to synchronize contents with rust-analyzer
```
replace_document
```
to update contents (version auto-increments)
```
close_document
```
when done (idempotent)

React to project structure changes

```
reload_workspace
```
after editing
```
Cargo.toml
```
or adding/removing crates
```
rebuild_proc_macros
```
if proc-macro source changed