Act on this, mostly signal

Running Claude Code and Codex on one repo needs isolation

What to do

Give each agent its own git worktree to stop concurrent writes to the same files.

Why

A Reddit user shares AGENTS.md and a shared memory, and worktrees are the suggested fix.

What the research found

A Reddit user runs Claude Code and Codex on the same repos, sharing AGENTS.md (imported by CLAUDE.md) and a shared memory, and asks how to prevent concurrent writes to the same files, with worktrees suggested as an option.

Claims and how well the evidence supports them

AGENTS.md is the shared instructions file and CLAUDE.md imports it 98%
Claude Code and Codex share a memory that agents read at task start and write at task end 98%
Concurrent edits to the same files by both agents remain an unsolved problem for the poster 96%

Evidence

reddit.com https://reddit.com/r/ClaudeAI/comments/1xas2n9/claude_code_codex_on_the_same_repo_how_do_you

Actionability rated medium.