Rosentic

Rosentic is a deterministic verification tool that sits between AI coding agents and your repository. Every time an agent opens a pull request, Rosentic checks that branch against every other open branch for structural incompatibilities—function signature mismatches, API contract drifts, and cross-language dependency conflicts that Git's text-based merge and individual CI checks miss. It runs as a GitHub Action on your own runner: one YAML file, no signup, no code leaves your infrastructure. Designed for teams deploying multiple parallel coding agents (Cursor, Claude Code, Copilot, Codex, Windsurf, Factory, or human contributors), Rosentic catches the invisible conflicts that arise when one agent changes an interface and another builds against the old version. Both branches pass CI independently; the merge breaks production. Rosentic detects those cases before merge and posts detailed PR comments pinpointing the breaking change, the stale caller, and the file locations. The engine is deterministic—no LLM inference, same input always yields same output. Its cross-branch analysis is commit-keyed and gated (advisory or blocking). An append-only audit trail with fingerprint and replay ensures every verdict is reproducible. Rosentic also offers an MCP server that lets agents validate files before writing them, putting the check inside the agent loop in under 100ms. Where it differs from alternatives: Rosentic doesn't observe runtime behavior or scan for security issues—it focuses purely on pre-merge cross-branch compatibility. Its deterministic, offline approach eliminates hallucination risk and data leakage, making it a pragmatic choice for teams scaling agent-based development. The free tier is generous (unlimited PR comments, no signup), while paid plans add dashboards, scan history, and the Merge Index for interface stability tracking.