msd-core/.changeset/fix-3360-codex-execute-worktrees.md

type, pr

type	pr
Fixed	3365

Codex execute-phase now fails closed when workflow.use_worktrees=true — because Codex spawn_agent has no direct mapping for Claude Code's isolation="worktree", the workflow now stops before executor dispatch instead of letting workspace-write agents edit the main checkout while the workflow assumes worktree isolation. (#3360)