Rosentic - Cross-Branch Merge Safety

Rosentic checks whether your active branches are compatible with each other before merge. It detects broken function signatures, HTTP route conflicts, and schema mismatches across 15+ languages using deterministic AST analysis.

This is not AI code review. Rosentic finds structural contract conflicts that would cause runtime failures after merge - the kind of breaks that tests don't catch because they only run on one branch at a time.

Install

pip install rosentic-mcp

Then add to your editor's MCP config:

{
  "mcpServers": {
    "rosentic": {
      "command": "rosentic-mcp",
      "args": [],
      "env": {}
    }
  }
}

Works with Cursor, Claude Code, Cline, Windsurf, and any editor that supports MCP.

What it does

Rosentic gives your AI coding agent three MCP tools:

Tool	Purpose
check_conflicts	Scan a repo for cross-branch contract conflicts
explain_conflict	Explain a specific finding and what to do about it
list_branches	List active branches so the agent can choose what to scan

Example conflicts Rosentic catches

• Branch A adds a required parameter to createOrder(). Branch B calls createOrder() with the old signature. Both pass CI. Merge breaks production.
• Branch A changes POST /api/users to require email in the request body. Branch B's frontend still sends the old payload.
• Branch A removes a field from a GraphQL type that Branch B's query depends on.

How it works

Before you push, open a PR, or merge, your agent runs a cross-branch compatibility check. It calls check_conflicts, which scans your repo's branch heads using tree-sitter AST parsing and reports any conflicts.

No code leaves your machine. The scan runs locally against your git repo.

Compared to Semgrep Guardian

Semgrep Guardian checks each file for security vulnerabilities and code issues. Rosentic checks whether your branches are compatible with each other. They solve different problems and work well together:

• Semgrep Guardian: "Is this code safe and correct on its own?"
• Rosentic: "Will this branch break other branches when merged?"

Links

• Rosentic website
• GitHub Action
• PyPI package