code-analyze-mcp

Standalone MCP server for code structure analysis using tree-sitter.

Overview

code-analyze-mcp is a Model Context Protocol server that analyzes code structure across 5 programming languages. It provides three analysis modes: directory overview (file tree with metrics), file-level semantic analysis (functions, classes, imports), and symbol-focused call graphs. It integrates with any MCP-compatible orchestrator (Claude Code, Kiro, Fast-Agent, MCP-Agent, and others), minimizing token usage while giving the LLM precise structural context.

Installation

Homebrew (macOS and Linux)

brew install clouatre-labs/tap/code-analyze-mcp

Update: brew upgrade code-analyze-mcp

cargo-binstall (no Rust required)

cargo binstall code-analyze-mcp

cargo install (requires Rust toolchain)

cargo install code-analyze-mcp

Quick Start

Build from source

cargo build --release

The binary is at target/release/code-analyze-mcp.

Configure MCP Client

Add to .mcp.json at your project root (shared with your team via version control):

{
  "mcpServers": {
    "code-analyze": {
      "command": "/path/to/code-analyze-mcp",
      "args": []
    }
  }
}

Or add via the Claude Code CLI:

claude mcp add code-analyze /path/to/code-analyze-mcp

Tool Interface

The analyze tool accepts these parameters:

Mode Auto-Detection

graph TD
    A["analyze tool called"] --> B{"Parameters provided?"}
    B -->|focus param| C["Symbol Focus Mode"]
    B -->|path is file| D["File Details Mode"]
    B -->|path is directory| E["Directory Overview Mode"]
    C --> F["Build call graph for symbol"]
    D --> G["Extract semantic elements from file"]
    E --> H["Walk directory tree and count elements"]
    F --> I["Return MCP response"]
    G --> I
    H --> I

Analysis Modes

Directory Overview

Walks a directory tree, counts lines of code, functions, and classes per file. Respects .gitignore rules via the ignore crate.

Triggered when: Path is a directory and no focus parameter is provided.

Example output:

src/                                [328 LOC | F:28 C:5]
  main.rs                           [18 LOC | F:1 C:0]
  lib.rs                            [156 LOC | F:12 C:3]
  parser.rs                         [89 LOC | F:8 C:2]
  formatter.rs                      [65 LOC | F:7 C:0]
  languages/                        [142 LOC | F:19 C:5]
    mod.rs                          [45 LOC | F:5 C:2]
    rust.rs                         [97 LOC | F:14 C:3]

Total: 4 files, 328 LOC, 28 functions, 5 classes

Usage:

# Overview with default recursion
analyze path: /path/to/project

# Limit depth to 2 levels
analyze path: /path/to/project max_depth: 2

# Get summary totals only
analyze path: /path/to/project summary: true

File Details

Extracts functions, classes, imports, and type references from a single file.

Triggered when: Path is a file and no focus parameter is provided.

Example output:

FILE: src/lib.rs [156 LOC | F:12 C:3]

CLASSES:
  CodeAnalyzer:20
  SemanticExtractor:45

FUNCTIONS:
  new:27
  analyze:35
  extract:52
  format_content:78
  build_index:89

IMPORTS:
  rmcp (3)
  serde (2)
  tree_sitter (4)
  thiserror (1)

REFERENCES:
  methods: [analyze, extract, format_content]
  types: [AnalysisResult, SemanticData, ParseError]
  fields: [path, mode, language]

Usage:

# File details
analyze path: /path/to/file.rs

# Get paginated results (100 items per page)
analyze path: /path/to/file.rs page_size: 50

# Fetch next page
analyze path: /path/to/file.rs cursor: eyJvZmZzZXQiOjUwfQ==

Symbol Call Graph

Builds a call graph for a named symbol and traverses it with configurable depth. Uses sentinel values <module> (top-level calls) and <reference> (type references).

Triggered when: focus parameter is provided.

Example output:

FOCUS: analyze
DEPTH: 2
FILES: 12 analyzed

DEFINED:
  src/lib.rs:35

CALLERS (incoming):
  main -> analyze [src/main.rs:12]
  <module> -> analyze [src/lib.rs:40]
  process_request -> analyze [src/handler.rs:88]

CALLEES (outgoing):
  analyze -> determine_mode [src/analyze.rs:44]
  analyze -> format_output [src/formatter.rs:12] (•2)
  analyze -> validate_params [src/validation.rs:5]
  determine_mode -> is_directory [src/utils.rs:23]

Functions called >3 times show (•N) notation.

Usage:

# Call graph with default depth (1)
analyze path: /path/to/project focus: my_function

# Deeper traversal
analyze path: /path/to/project focus: my_function follow_depth: 3

# With directory limit
analyze path: /path/to/project focus: my_function max_depth: 3 follow_depth: 2

Output Management

For large codebases, two mechanisms prevent context overflow:

Pagination

File details and symbol focus modes append a NEXT_CURSOR: line when output is truncated. Pass the token back as cursor to fetch the next page.

# Response ends with:
NEXT_CURSOR: eyJvZmZzZXQiOjUwfQ==

# Fetch next page:
analyze path: /my/project cursor: eyJvZmZzZXQiOjUwfQ== page_size: 100

Summary Mode

When output exceeds 50K chars, the server auto-compacts results using aggregate statistics. Override with summary: true (force) or summary: false (disable).

# Force summary for large project
analyze path: /huge/codebase summary: true

# Disable summary (get full details, may be large)
analyze path: /project summary: false

Supported Languages

Documentation

• ARCHITECTURE.md - Design goals, module map, data flow, language handler system, caching strategy
• CONTRIBUTING.md - Development workflow, commit conventions, PR checklist
• SECURITY.md - Security policy and vulnerability reporting

License

Apache-2.0. See LICENSE for details.