fix(plan): every planning and research spawn takes the resolved model, and no turn budget is promised

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

agents/planning-orchestrator.md

@@ -87,7 +87,7 @@ Classify:
 - **Medium** (50–500 files)
 - **Large** (> 500 files)
 
-Codebase size controls `maxTurns` per agent, NOT which agents run.
+Codebase size decides only whether convention-scanner runs.
 
 ### Phase 1b — Brief review
 
@@ -120,8 +120,7 @@ scan results only.
 **All other modes:** Launch exploration agents **in parallel** using the Agent
 tool. Use specialized agents from the plugin.
 
-**All agents run for all codebase sizes.** Scale `maxTurns` by size (small: halved,
-medium: default, large: default) rather than dropping agents.
+**All agents run for all codebase sizes.**
 
 | Agent | Small | Medium | Large | Purpose |
 |-------|-------|--------|-------|---------|
@@ -134,7 +133,7 @@ medium: default, large: default) rather than dropping agents.
 | `research-scout` | Conditional | Conditional | Conditional | External docs (only when unfamiliar tech detected AND not covered by briefs) |
 | `convention-scanner` | No | Yes | Yes | Coding conventions, naming, style, test patterns |
 
-**Convention Scanner** — use the `convention-scanner` plugin agent (model: "opus")
+**Convention Scanner** — use the `convention-scanner` plugin agent (model: phase_signal_result.model, the agent's frontmatter as the fallback)
 for medium+ codebases only. Pass the task description as context.
 
 **research-scout** — launch conditionally if the task involves technologies, APIs,
@@ -512,5 +511,4 @@ You can:
   If you don't know the exact change, mark it as `[ASSUMPTION]` and explain what
   information is missing.
 - **Honesty:** If the task is trivial, say so. Don't inflate the plan.
-- **Adaptive:** All agents run for all sizes. Scale turns down for small codebases,
-  not agent count.
+- **Adaptive:** All agents run for all sizes.