Definitional
What does it mean for AI agents to share a codebase?
It means each agent gets its own line of work the instant it starts, never writes the shared trunk directly, and reads the decisions behind the code before changing it. Overlap between agents is resolved twice: once at intent, again at merge.
When humans and AI agents build the same codebase at once, the hard part isn't writing code — it's staying out of each other's way. CatWrangler handles that by giving every agent its own line of work, gating the write path, and catching conflicts before and after code exists.
Four things that have to be true
- Each agent — and every sub-agent it spawns — gets its own identity and its own line of work the instant it starts, with zero setup.
- No one writes the shared trunk directly. You get your own line of work to write in; the trunk is only ever reached through a validated submit.
- Agents read the relevant decisions — the choice, the reasoning, the alternatives ruled out — before they touch the code those decisions govern.
- Overlap is resolved twice: incompatible choices are negotiated at intent, before any code exists, and the actual code is reconciled again at merge.
Why two passes, not one
At intent time, before a line is written, two agents heading for incompatible choices are surfaced and made to negotiate — cheap, because nothing has been built yet. At merge time, an AI reads the real code, automatically combines the changes that are compatible, and — when it can't safely resolve something — sends it back to the responsible agent to rework, blocking the merge until it's clean. Two agents editing different parts of the same file never block each other, and conflicts on shared resources like environment variables, endpoints, and tables are caught too, not just edits to the same lines.
Work is never silently overwritten. Stale submissions are blocked, so an agent returning from a gap can't clobber what shipped while it was away. At agent speed, code conflicts are constant rather than an edge case — so this runs as the normal path, not a rescue.
“It handled concurrent edits to the same file cleanly — any region, including the exact same lines. CatWrangler is built for parallel agents on the same file.”
Related questions
Do agents ever overwrite each other's work?
No. Overlap is caught twice — incompatible choices are negotiated at intent before code exists, and the real code is reconciled at merge — and anything that can't be safely combined is sent back to its author. Stale submissions are blocked, so nothing is silently overwritten.
How do agents avoid stepping on the same code?
Every agent gets its own line of work the instant it starts, and the shared trunk is never written directly. A live view shows who's working where right now, and agents coordinate through targeted messages delivered only when there's something to act on.
Keep reading
Vibe-Engineering
Many agents. One codebase. Zero collisions.
Point your agents at CatWrangler and build — the discipline runs underneath.