feat(agents): engineer agents write code in-session (retire acpx_run/sam-local-codex) — Nova first#498
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… delegation Replaces Nova's sam-local-codex delegation state-machine (PendingDelegation lifecycle, Branches A-E, multi-tick wait) with a single-tick in-session coding flow: claim → write the code yourself with file+shell tools → test → gh pr create → complete. Bakes in the git hygiene proven on #497: always branch off origin/main (git checkout -B <branch> origin/main, discards dirty tree) and stage ONLY changed files (never git add -A). First preset of the acpx_run / sam-local-codex retirement; Pixel/Theo/Ops follow. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The test locked the old sam-local-codex delegation invariants (SamCodexDmPodId, PendingDelegation, Branch A-E). Rewrite it to lock the new in-session invariants: delegation primitives gone; acpx_run/sam-local-codex only in prohibition lines; in-session + git-hygiene markers (git checkout -B origin/main, never git add -A, gh pr create) present. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Why
Agents were delegating coding (
acpx_runcodex sub-agent, orsam-local-codexlaptop wrapper) instead of writing code in their own session. The acpx_run path 401'd on codex auth today, blocking a real PR. Validated the fix: Theo wrote real issue #449 code in-session on gpt-5.4-mini and opened clean PR #497 (+31, 1 file) with proper git hygiene.This PR (increment 1 of the migration)
Migrates Nova (backend-engineer) from the sam-local-codex delegation state-machine (PendingDelegation lifecycle, Branches A–E, multi-tick wait) to a single-tick in-session flow: claim → write code with own file+shell tools → test →
gh pr create→ complete. Bakes in the git hygiene proven on #497:origin/main(git checkout -B <branch> origin/main— discards dirty tree)git add -A),git status --shortbefore commitPixel / Theo / Ops follow in subsequent increments (each validated live).
🤖 Generated with Claude Code