diff --git a/templates/plan-template.md b/templates/plan-template.md
index e812b41..283ffd4 100644
--- a/templates/plan-template.md
+++ b/templates/plan-template.md
@@ -15,7 +15,7 @@ scripts:
 1. Load feature spec from Input path
    → If not found: ERROR "No feature spec at {path}"
 2. Fill Technical Context (scan for NEEDS CLARIFICATION)
-   → Detect Project Type from context (web=frontend+backend, mobile=app+api)
+   → Detect Project Type from file system structure or context (web=frontend+backend, mobile=app+api)
    → Set Structure Decision based on project type
 3. Fill the Constitution Check section based on the content of the constitution document.
 4. Evaluate Constitution Check section below
@@ -69,8 +69,14 @@ specs/[###-feature]/
 ```
 
 ### Source Code (repository root)
+<!--
+  ACTION REQUIRED: Replace the placeholder tree below with the concrete layout
+  for this feature. Delete unused options and expand the chosen structure with
+  real paths (e.g., apps/admin, packages/something). The delivered plan must
+  not include Option labels.
+-->
 ```
-# Option 1: Single project (DEFAULT)
+# [REMOVE IF UNUSED] Option 1: Single project (DEFAULT)
 src/
 ├── models/
 ├── services/
@@ -82,7 +88,7 @@ tests/
 ├── integration/
 └── unit/
 
-# Option 2: Web application (when "frontend" + "backend" detected)
+# [REMOVE IF UNUSED] Option 2: Web application (when "frontend" + "backend" detected)
 backend/
 ├── src/
 │   ├── models/
@@ -97,15 +103,16 @@ frontend/
 │   └── services/
 └── tests/
 
-# Option 3: Mobile + API (when "iOS/Android" detected)
+# [REMOVE IF UNUSED] Option 3: Mobile + API (when "iOS/Android" detected)
 api/
 └── [same as backend above]
 
 ios/ or android/
-└── [platform-specific structure]
+└── [platform-specific structure: feature modules, UI flows, platform tests]
 ```
 
-**Structure Decision**: [DEFAULT to Option 1 unless Technical Context indicates web/mobile app]
+**Structure Decision**: [Document the selected structure and reference the real
+directories captured above]
 
 ## Phase 0: Outline & Research
 1. **Extract unknowns from Technical Context** above: