The missing layer.

Everyone builds the input side. Everyone monitors the output side. Nobody checks whether the code is compatible before it merges.

For the ecosystem map, see the Agent Stack →

AI Coding Agents Write code

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Rosentic Check all PRs against each other

Repository Code merges here

CI/CD Build and test

Observability Monitor production

Agents + Review

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Merge

Post-merge

Cursor AI agent

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Copilot AI agent

Windsurf AI agent

Claude Code AI agent

Each agent has its own review

Claude Code Review 1 PR

Codex PR Review 1 PR

Copilot Review 1 PR

Each reviews its own agent's PR.
None check across agents.

🌹

Rosentic

Checks every PR against every other PR. Cross-branch. Cross-agent. Cross-language.

Compatibility verification

GitHub

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CI/CD

Build, test, deploy

Tests merged code. Catches if it compiles and tests pass.

GitHub Actions CircleCI Jenkins

Observability

Monitor production

Is it running? Is it fast? Is it healthy?

Datadog Chronosphere New Relic

Every layer exists except one.

Agents have their own review tools. Repos have CI. Production has monitoring. Nobody checks whether all the agents' code is compatible with each other before it merges. That's the gap. That's Rosentic.

Code Review

1 PR

Is this code good?

Rosentic

All PRs

Do they work together?

Observability

Production

Is it running healthy?

CI impact

Runs alongside your tests. Finishes before they do.

Rosentic runs as a parallel GitHub Actions job. It doesn't insert into your build or test chain. No external API calls, no cloud round-trips.

1.4s

Median scan time across 106 real-world scans

74%

of scans finish under 5 seconds

lines of code leave your runner

⇵

Parallel, not serial

Runs as its own job. Your build and test suites are unaffected.

⚡

Scales with branches, not repo size

A 50,000-line repo scans as fast as a 5,000-line repo with the same branch count.

Inside your PR

What it looks like inside GitHub.

Rosentic comments directly on the line that breaks other branches. Engineers see the impact before they merge - without leaving the PR.

✓

feat: add shipping_address to create_order#347

agent/payments → main

Conversation

Files changed

backend/orders/services.py +8 -3

@@ -42,7 +42,12 @@ class OrderService:

def create_order(self, customer_id, items):

- order = Order(customer_id=customer_id, items=items)

+ def create_order(self, customer_id, items, shipping_address):

+ if not shipping_address:

+ raise ValueError("shipping_address required")

order.validate()

rosentic bot 2 minutes ago

UNSAFE

This function has 5 callers on 3 other active branches that still pass 2 arguments. Adding required parameter shipping_address will break them when both branches merge.

Source

services.py:create_order() line 44

Change

Required param added (was 2 args, now 3)

Callers

5 call sites across 3 branches still send 2 args

feat/checkout

feat/bulk-orders

agent/inventory

View full report

Intentional change

Dismiss

sarahdev author

Good catch - the bulk-orders branch is mine too, I'll update it. But the checkout branch was from last sprint, @mike is that still active?

Rosentic comments on the exact line. Engineers collaborate in the thread natively.

Coming soon

Where we're going

Compatibility monitoring, everywhere you work.

Every surface shows the same data at a different moment - while typing, before pushing, on the PR, and across the team.

PR Comment Live

Automatic scan on every PR. Conflicts posted as a comment. Zero config.

Interactive Report Internal

Full drill-down HTML reports with severity tiles, root cause grouping, and source context. Currently used internally. Shareable reports for teams coming soon.

GitHub App + Dashboard Next

One-click install from GitHub Marketplace. All repos in one view. Conflict trends, agent activity, resolution workflow.

CLI + IDE Planned

Scan from your terminal before pushing. Real-time warnings in VS Code, Cursor, and JetBrains while you code.