Move-only (TASK-rectification-code-split-20260926 T3/T4). No behavior,
receipt, billing, Skill or scoring change.
- agent-run.ts: 1400 -> 135 lines; runV9AgentTurn 1046 -> 25 lines, no
nested functions. It keeps the public types, the budget constants and the
phase order: agent-run-prepare.ts (reliability, session, year re-ask, Skill
identity, delivered guard, reserve, turn row / replay),
agent-run-retry.ts (attempt loop), agent-run-attempt.ts (the old nested
streamAttempt), agent-run-finish.ts (billing settle, receipts, interview,
finalize), agent-run-support.ts (outcome types, retry classification, turn
receipt writers), agent-run-messages.ts (buildAgentMessages /
buildOpeningBrief, re-exported).
- One token changed with the move: the attempt passes its own
`previousErrorCode` argument to buildAgentMessages instead of reading the
enclosing `lastAttemptError`; the loop passes that same value (clears the
old unused-parameter warning).
- Tests: whole-source contracts read tests/rectification-agent-run-surface.ts;
behavioral runV9AgentTurn tests unchanged. agent-run growth caps added.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8
