rosentic-mcp 0.1.0

MCP server for Rosentic — deterministic cross-branch conflict detection for AI coding agents

Rosentic MCP Server

CI checks each PR against main. It doesn't check open PRs against each other.

Rosentic does. Install one package. Your coding agent checks for cross-branch conflicts before you merge.

One agent changes a function signature. Another agent still calls the old version. Both pass CI. Git merges the text cleanly. Main breaks.

Rosentic compares every open PR against every other open PR. Deterministic static analysis. No LLM. 12 languages. Code never leaves your machine.

Install

pip install rosentic-mcp

Configure

Claude Code

Add to ~/.claude.json:

{
  "mcpServers": {
    "rosentic": {
      "command": "rosentic-mcp"
    }
  }
}

Cursor / VS Code

Add to MCP settings:

{
  "rosentic": {
    "command": "rosentic-mcp"
  }
}

Tools

check_conflicts

Scan a git repo for cross-branch conflicts affecting your current branch.

Parameters:

• repo_path (required) — path to local git repository
• branch — branch to check (defaults to current branch)
• base — base branch to compare against (defaults to main)
• format — "summary" (natural language) or "json" (structured findings)

Example response:

Rosentic found 4 unique conflict(s) for feature/auth-refactor: 2 UNSAFE, 2 WARNING. Layer breakdown: 3 L1 signature, 1 L2 route. Most critical: createUser() in src/auth/users.ts — changed from 2 to 3 required params. Recommendation: inspect the UNSAFE findings first and update the stale branch before merging.

explain_conflict

Get detailed explanation of a specific finding, including affected branches, consumer locations, and remediation steps.

Parameters:

• repo_path (required) — path to local git repository
• finding_id (required) — ID from a previous check_conflicts result

list_branches

List local branches sorted by most recent commit date.

Parameters:

• repo_path (required) — path to local git repository

What it detects

Layer	What	Example
L1	Function signature mismatches	Branch A adds required param, Branch B still calls with old arity
L2	HTTP route contract breaks	Route path or method changes, consumers still call old endpoint
L3	Schema incompatibilities	Proto field removed, GraphQL type changed, OpenAPI contract broken

How it works

• Deterministic — no LLM in the scan path. Tree-sitter AST parsing + evidence-gated verdicts.
• Fast — scans 30 branches in under 30 seconds for most repos.
• Evidence-based — every finding includes proof: which symbol changed, where it's called, why it's linked.

Requirements

• Python 3.11+
• Git repository with branches to scan
• Works on macOS, Linux, Windows (WSL)

Links

• Website
• GitHub
• GitHub Action