fix: address Guardian review findings — sync Creator agent, wire hooks, add cost table

- Sync agents/creator.md output format with plan-phase skill (3-axis confidence,
  alternatives considered, mini-reflect) — fixes adaptation rule A3 dependency
- Wire hook points into orchestration Act phase (pre-merge, post-merge)
- Add cost-per-agent-tier table to autonomous-mode for budget scheduling
- Add team preset loading reference to orchestration Step 0

skills/autonomous-mode/SKILL.md

@@ -171,7 +171,15 @@ Budget: $5.00 (or ~2M tokens)
 | < 25% | Run remaining tasks as `fast` only |
 | Exhausted | Stop. Log remaining tasks as "skipped — budget exhausted" |
 
-Budget is tracked per-task in the session log. Estimated cost = agents spawned x model tier pricing.
+Budget is tracked per-task in the session log. Estimated cost per agent by model tier:
+
+| Tier | Model | Est. Cost/Agent |
+|------|-------|----------------|
+| cheap | Haiku | ~$0.01 |
+| standard | Sonnet | ~$0.05 |
+| premium | Opus | ~$0.25 |
+
+A standard workflow (6 agents, mostly Sonnet) costs ~$0.30. A thorough workflow (8 agents) costs ~$0.50. These are rough estimates — actual cost depends on context size and output length.
 
 ## Auto-Resume on Interruption