Semamerge

Detects semantic merge conflicts between Git branches using AST-level analysis

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "semamerge": {
      "command": "npx",
      "args": [
        "-y",
        "semamerge"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

SemaMerge

An MCP (Model Context Protocol) server that detects semantic merge conflicts between Git branches using AST-level analysis.

When two branches change code in ways that Git merges cleanly but are functionally incompatible, SemaMerge catches it before the merge breaks your app.

What It Detects

Conflict Type	Example
Type signature change	Branch A changes `getUser()` return type, Branch B calls `getUser().address`
Removed/renamed export	Branch A removes `export function validate()`, Branch B adds `import { validate }`
Parameter change	Branch A adds required param to function, Branch B calls with old signature
Interface/contract break	Branch A adds required field to interface, Branch B implements without it
Enum/constant change	Branch A removes `Status.PENDING`, Branch B uses `Status.PENDING`
Import path change	Branch A moves file, Branch B imports from old path

Installation

Terminal

npx semamerge

Or install globally:

Terminal

npm install -g semamerge

Or clone and build from source:

bash

git clone https://github.com/vineethwilson15/semamerge.git
cd semamerge
npm install
npm run build

MCP Tools

`check_merge_safety`

Quick pre-merge check. Returns a risk score (safe/warning/danger).

config.json

{
  "repoPath": "/path/to/repo",
  "sourceBranch": "feature-x",
  "targetBranch": "main"
}

`analyze_branches`

Deep analysis with per-file breakdown of all semantic conflicts.

config.json

{
  "repoPath": "/path/to/repo",
  "branchA": "feature-x",
  "branchB": "feature-y",
  "baseBranch": "main"
}

`list_semantic_changes`

Lists all semantic changes on a branch (functions, exports, types, etc.).

config.json

{
  "repoPath": "/path/to/repo",
  "branch": "feature-x",
  "baseBranch": "main"
}

`analyze_file_pair`

Deep-dive into a specific file's semantic diff between two branches.

config.json

{
  "repoPath": "/path/to/repo",
  "filePath": "src/utils.ts",
  "branchA": "feature-x",
  "branchB": "main"
}

Configuration

VS Code (Copilot)

Add to your VS Code settings.json:

config.json

{
  "mcp": {
    "servers": {
      "semamerge": {
        "command": "node",
        "args": ["/path/to/semamerge/dist/index.js"]
      }
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

config.json

{
  "mcpServers": {
    "semamerge": {
      "command": "node",
      "args": ["/path/to/semamerge/dist/index.js"]
    }
  }
}

Supported Languages

TypeScript / JavaScript (.ts, .tsx, .js, .jsx, .mjs, .cjs)
Python support planned

How It Works

Git layer — Reads file content from branches without checkout using git show
AST parsing — Parses source code with tree-sitter (WASM) into syntax trees
Semantic extraction — Walks ASTs to extract function signatures, types, exports, imports, enums
Three-way comparison — Computes semantic diffs from common ancestor to each branch
Conflict detection — Cross-references changes to find incompatibilities

Development

Terminal

npm run build    # Compile TypeScript
npm run dev      # Watch mode
npm test         # Run tests

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Semamerge

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "semamerge": { "command": "npx", "args": ["-y", "semamerge"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

35Quality signal: Fair · 35/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools15/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

★ Featured

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MCP & Agent Skills for Automated Documentation, and codebase conventions + context

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Semamerge →Install in Claude Desktop Install in Cursor Install in VS Code

Semamerge

Detects semantic merge conflicts between Git branches using AST-level analysis

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "semamerge": {
      "command": "npx",
      "args": [
        "-y",
        "semamerge"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

SemaMerge

An MCP (Model Context Protocol) server that detects semantic merge conflicts between Git branches using AST-level analysis.

When two branches change code in ways that Git merges cleanly but are functionally incompatible, SemaMerge catches it before the merge breaks your app.

What It Detects

Conflict Type	Example
Type signature change	Branch A changes `getUser()` return type, Branch B calls `getUser().address`
Removed/renamed export	Branch A removes `export function validate()`, Branch B adds `import { validate }`
Parameter change	Branch A adds required param to function, Branch B calls with old signature
Interface/contract break	Branch A adds required field to interface, Branch B implements without it
Enum/constant change	Branch A removes `Status.PENDING`, Branch B uses `Status.PENDING`
Import path change	Branch A moves file, Branch B imports from old path

Installation

Terminal

npx semamerge

Or install globally:

Terminal

npm install -g semamerge

Or clone and build from source:

bash

git clone https://github.com/vineethwilson15/semamerge.git
cd semamerge
npm install
npm run build

MCP Tools

`check_merge_safety`

Quick pre-merge check. Returns a risk score (safe/warning/danger).

config.json

{
  "repoPath": "/path/to/repo",
  "sourceBranch": "feature-x",
  "targetBranch": "main"
}

`analyze_branches`

Deep analysis with per-file breakdown of all semantic conflicts.

config.json

{
  "repoPath": "/path/to/repo",
  "branchA": "feature-x",
  "branchB": "feature-y",
  "baseBranch": "main"
}

`list_semantic_changes`

Lists all semantic changes on a branch (functions, exports, types, etc.).

config.json

{
  "repoPath": "/path/to/repo",
  "branch": "feature-x",
  "baseBranch": "main"
}

`analyze_file_pair`

Deep-dive into a specific file's semantic diff between two branches.

config.json

{
  "repoPath": "/path/to/repo",
  "filePath": "src/utils.ts",
  "branchA": "feature-x",
  "branchB": "main"
}

Configuration

VS Code (Copilot)

Add to your VS Code settings.json:

config.json

{
  "mcp": {
    "servers": {
      "semamerge": {
        "command": "node",
        "args": ["/path/to/semamerge/dist/index.js"]
      }
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

config.json

{
  "mcpServers": {
    "semamerge": {
      "command": "node",
      "args": ["/path/to/semamerge/dist/index.js"]
    }
  }
}

Supported Languages

TypeScript / JavaScript (.ts, .tsx, .js, .jsx, .mjs, .cjs)
Python support planned

How It Works

Git layer — Reads file content from branches without checkout using git show
AST parsing — Parses source code with tree-sitter (WASM) into syntax trees
Semantic extraction — Walks ASTs to extract function signatures, types, exports, imports, enums
Three-way comparison — Computes semantic diffs from common ancestor to each branch
Conflict detection — Cross-references changes to find incompatibilities

Development

Terminal

npm run build    # Compile TypeScript
npm run dev      # Watch mode
npm test         # Run tests

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Semamerge

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "semamerge": { "command": "npx", "args": ["-y", "semamerge"] } }

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/semamerge?style=directory)](https://allmcps.com/mcp/semamerge)

HTML Embed

<a href="https://allmcps.com/mcp/semamerge"><img src="https://allmcps.com/api/badge/semamerge?style=directory" alt="Semamerge on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

35Quality signal: Fair · 35/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools15/30

Adoption & activity1/15

Community engagement0/10

★ Featured

Moxie Docs MCP

MCP & Agent Skills for Automated Documentation, and codebase conventions + context

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Semamerge →Install in Claude Desktop Install in Cursor Install in VS Code