feat(goal): sync blocked lifecycle and user abort handling

[code-yeongyu]

Summary

• Sync the vendored goal builtin to pi-goal 0.3.0: completed-goal replacement with JSONL history, marker-aware 4,000-code-point objective spills, and blocked lifecycle persistence/tool semantics.
• Deliver an explicit agent-end abort payload (aborted, abortSource) and use it to block only user-interrupted active goals; the next real user run resumes them.
• Align vendored pi-todotools provenance to 0.2.0 while retaining Senpi renderer, /todo, builtin identity, and persistence-key adaptations.

Provenance

• Approved plan: .omo/plans/pi-todo-goal-upgrade.md
• Upstream goal source: pi-goal PR #1
• Upstream todo source: pi-todotools PR #13

Verification

• npm run check at repository root
• npx vitest run goal goal-extension goal-turn-usage goal-modules goal-store goal-abort-extension app-server-thread-goal todo builtin-extension-sync (144 tests)
• Isolated real-CLI mock-loop QA receipts: local-ignore/qa-evidence/20260726-goal-todo-resync/
  • create -> complete -> create/archive
  • blocked with reason -> next-user-message resume
  • 4,200-character objective spill
  • todo init/start/done/append/view
  • abort injection is not exposed by the mock-loop helper; goal-abort-extension.test.ts supplies the deterministic ESC-abort proof.

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Summary by cubic

Syncs the goal builtin to pi-goal@0.3.0 and todo tools to pi-todotools@0.2.0, adding a blocked goal lifecycle, JSONL goal history, 4,000‑char objective truncation with spill files, and explicit user/system abort attribution so only user‑aborted turns block and the next user‑triggered run resumes.

• New Features

  • Blocked lifecycle: model may set blocked with a non-empty reason; persisted as blockedReason/blockedAt; no auto-continue while blocked; the next user run resumes to active.
  • Abort handling: agent_end now includes aborted and abortSource; user-aborted active turns are marked blocked after usage accounting; system aborts do not block.
  • Objective handling: 4,000 code point limit with marker-aware truncation; full text saved to <thread>.objective-full.txt; tool responses include a truncation notice.
  • Goal replacement + history: create_goal replaces a completed goal and appends the old goal to <thread>.history.jsonl; rejected if an unfinished goal exists.
  • Tools/API: update_goal supports complete and blocked (requires reason for blocked, rejects reason for complete); guidance updated to avoid premature blocking and to audit repeated blocks; create_goal docs note limits and replacement; thread API exposes blocked on get while thread/goal/set still rejects setting blocked directly.
  • Accounting/UI: usage accounted for blocked turns; continuation suppressed while blocked; UI shows “Goal blocked: ”; thread wire includes blocked status.

• Dependencies

  • Updated pi-goal to 0.3.0.
  • Updated pi-todotools to 0.2.0.

^{Written for commit 01144db. Summary will update on new commits.}