Model routing, PostCompact hook, parallel spawning, error recovery

Model tier assignment:
- model: haiku → help, sprint-status, story-readiness, scope-check,
  project-stage-detect, changelog, patch-notes, onboard (read-only/format)
- model: opus → review-all-gdds, architecture-review, gate-check
  (multi-doc synthesis, high-stakes verdicts)

PostCompact hook:
- New .claude/hooks/post-compact.sh — fires after compaction, reminds
  Claude to re-read production/session-state/active.md to restore context
- Registered in settings.json between PreCompact and Stop

Parallel Task spawning:
- review-all-gdds: Phase 2 (consistency) and Phase 3 (design theory) now
  explicitly instructed to spawn as parallel Task agents simultaneously

Error Recovery Protocol:
- Standard BLOCKED-handling section added to: review-all-gdds,
  architecture-review, dev-story, team-combat, team-qa, team-narrative,
  team-level, team-ui, team-audio, team-release, team-polish
- Pattern: surface blocker → assess dependencies → offer 3 options via
  AskUserQuestion → always produce partial report

Coordination rules:
- Added Model Tier Assignment table with routing rationale
- Added Subagents vs Agent Teams section (experimental agent teams docs)
- Added Parallel Task Protocol (when/how to spawn parallel agents)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/skills/team-audio/SKILL.md

@@ -88,3 +88,21 @@ Spawn the `gameplay-programmer` agent to:
 
 6. **Output a summary** with: audio event count, estimated asset count,
    implementation tasks, and any open questions between team members.
+
+## Error Recovery Protocol
+
+If any spawned agent (via Task) returns BLOCKED, errors, or cannot complete:
+
+1. **Surface immediately**: Report "[AgentName]: BLOCKED — [reason]" to the user before continuing to dependent phases
+2. **Assess dependencies**: Check whether the blocked agent's output is required by subsequent phases. If yes, do not proceed past that dependency point without user input.
+3. **Offer options** via AskUserQuestion with choices:
+   - Skip this agent and note the gap in the final report
+   - Retry with narrower scope
+   - Stop here and resolve the blocker first
+4. **Always produce a partial report** — output whatever was completed. Never discard work because one agent blocked.
+
+Common blockers:
+- Input file missing (story not found, GDD absent) → redirect to the skill that creates it
+- ADR status is Proposed → do not implement; run `/architecture-decision` first
+- Scope too large → split into two stories via `/create-stories`
+- Conflicting instructions between ADR and story → surface the conflict, do not guess