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I've been asking teams a simple question:

The answers have all been reasonable:

• One worktree per agent
• Rebase before merge
• CI on every PR
• Codex or Copilot reviewing Claude's diff
• Human review before merge

But most of these workflows check one branch at a time.

Standard CI asks:

Multi-agent teams increasingly need to ask:

Those are not the same question.

The failure mode

Branch A, opened by Agent A:

function createUser(email: string, role: string) {}

Branch B, opened by Agent B:

createUser(email)

Both branches can pass CI against main.

There may be no Git conflict. No file overlap. No obvious review comment. Each PR can look safe in isolation.

The break only appears when both changes exist together.

That's the merge safety gap.

What we're building

This is what we're building Rosentic to check.

Rosentic runs in CI and compares active branches against each other for semantic conflicts:

• Function signature drift
• Route and client mismatches
• GraphQL, OpenAPI, and proto contract breaks

It runs inside your GitHub runner. Source code stays in your infrastructure. The result is a PR comment showing conflicts between the current PR and other active branches.

What teams told me

I asked about this in a few engineering communities this week. Nobody said, "we already have a tool for that."

People had good workflows. But the workflows were mostly variations of:

• Rebase sequentially
• Rely on CI
• Review manually
• Ask another model to review the diff

A developer framed it well:

That's exactly the risk.

What each tool actually covers

Worktrees solve local isolation.

CI solves branch-to-main validation.

Code review solves local diff quality.

None of those automatically prove that two open branches still agree on the same function signatures, routes, schemas, or service contracts.

That mattered less when one developer owned most of the context. It matters more when teams have several developers each running Claude Code, Codex, Cursor, or Copilot agents in parallel.

Looking for teams hitting this

I'm looking to compare notes with teams actually experiencing this. Especially teams where:

• Multiple developers use coding agents in the same repo
• Several agent-assisted PRs are open at once
• PRs touch shared APIs, routes, schemas, or service layers
• CI is green, but integration still feels fragile

I'm not trying to sell you a dashboard. I'm trying to understand where the breakage actually appears.

If this is happening on your team, email me: [email protected].