feat: workflow intelligence, quality loop, completion promises, parallel teams

Sprint 1 — Workflow Intelligence (A1-A3):
- Conditional escalation: fast→standard on 2+ CRITICALs
- Guardian fast-path: skip remaining reviewers on clean pass
- Confidence-triggered escalation: pause/upgrade/probe on low scores

Sprint 2 — Quality Loop (B1-B2, B5-B6):
- Maker self-review checklist before submitting to Check phase
- Proposal diff ("What Changed") on cycle 2+ revisions
- Convergence detection: escalate to user if same finding persists 2 cycles
- Cross-archetype dedup: merge duplicate findings from different reviewers

Sprint 3 — Completion & Verification (B3-B4):
- Completion promise: user-defined done criteria checked in Act phase
- Post-merge verification: run tests on main, auto-revert on failure

Sprint 4 — Parallel & Scale (C1-C4):
- Parallel team orchestration: 2-3 independent teams with merge gate
- Task dependency graph in autonomous queue format
- Auto-resume on interruption via .archeflow/state.json
- Budget-aware scheduling with automatic workflow downgrade

skills/check-phase/SKILL.md

@@ -66,6 +66,12 @@ After all reviewers finish, compile:
 |----------|----------|----------|-------------|-----|
 | src/auth/handler.ts:48 | CRITICAL | reliability | Empty string bypasses validation | Add `if (!token || token.trim() === '')` guard |
 
+### Deduplication
+If two reviewers raise the same issue (same file + same category), merge:
+| Guardian + Skeptic | CRITICAL | security | Input not sanitized (src/api.ts:30) | Add validation |
+
+Use the higher severity. Don't double-count in the verdict.
+
 ### Verdict: REJECTED — 1 critical finding
 → Build cycle feedback (see orchestration skill) and feed to Plan phase
 ```