feat: update plan

Author: wislertt

.amazonq/plan/cookiecutter-template-plan.md

@@ -200,4 +200,17 @@
 - **Multi-problem testing** ensures template generalization
 - **Explicit file comparison** documents exact requirements
 
+## Critical Rule: Reference Directory Protection
+
+**NEVER modify these reference directories:**
+
+- `.templates/leetcode/.example/` - Template reference examples
+- `leetcode/.example/` - Generated file reference examples
+
+**ONLY modify the actual template directory:**
+
+- `.templates/leetcode/{{cookiecutter.question_name}}/` - The actual cookiecutter template
+
+**Workflow**: Modify template → Generate (`make q-gen`) → Compare vs reference (`make q-validate`)
+
 This plan ensures the template generates files that exactly match `leetcode/.example/` while maintaining the robust generation process described in the rules.

.amazonq/rules/template-modification-rules.md

@@ -0,0 +1,46 @@
+# Template Modification Rules
+
+## Critical: Do NOT Modify Reference Directories
+
+**NEVER modify these reference directories:**
+
+- `.templates/leetcode/.example/` - Template reference examples
+- `leetcode/.example/` - Generated file reference examples
+
+These are reference implementations that show what the final generated files should look like.
+
+## Only Modify Template Source
+
+**ONLY modify the actual template directory:**
+
+- `.templates/leetcode/{{cookiecutter.question_name}}/` - The actual cookiecutter template
+
+## Workflow
+
+1. **Modify**: Only `.templates/leetcode/{{cookiecutter.question_name}}/` files
+2. **Generate**: `make q-gen QUESTION=name` → creates files in `leetcode/name/`
+3. **Compare**: Generated `leetcode/name/` vs reference `leetcode/.example/name/`
+4. **Validate**: `make q-validate QUESTION=name`
+
+## Template Structure
+
+```
+.templates/leetcode/
+├── {{cookiecutter.question_name}}/     ← MODIFY THESE FILES
+│   ├── __init__.py
+│   ├── solution.py
+│   ├── tests.py
+│   ├── README.md
+│   └── playground.ipynb
+├── cookiecutter.json                   ← MODIFY THIS CONFIG
+└── gen.py                             ← MODIFY IF NEEDED
+```
+
+## Reference Structure (DO NOT MODIFY)
+
+```
+.templates/leetcode/.example/           ← DO NOT MODIFY
+leetcode/.example/                      ← DO NOT MODIFY
+```
+
+This ensures template changes are properly tested against stable reference implementations.