The resumed lane had lost its managed worktree, but the remote branch and proof still existed. The remaining OpenSpec cleanup step still pointed at dev even though gitguardex now finishes this branch against main, so I corrected the task log before merge.

Constraint: Existing split-cli commit already published on origin and should not be rewritten
Rejected: Leave tasks.md stale and rely on operator memory | merged OpenSpec artifact would keep wrong cleanup command
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep OpenSpec cleanup commands aligned with the repo's protected base branch before finish
Tested: node --check bin/multiagent-safety.js; node --check src/cli/main.js src/cli/args.js src/cli/dispatch.js src/git/index.js; node --test test/doctor.test.js; node --test test/setup.test.js; node --test test/metadata.test.js; node --test test/cli-args-dispatch.test.js; openspec validate setup-current-single-repo-alias --type change --strict; openspec validate agent-codex-split-cli-main-args-dispatch-2026-04-22-13-48 --type change --strict; openspec validate --specs; node bin/multiagent-safety.js doctor --current --dry-run; node bin/multiagent-safety.js setup --current --dry-run --no-global-install
Not-tested: gx branch finish merge and cleanup before it runs