Merge pull request #2552 from paperclipai/PAPA-42-add-model-used-to-pr-template-and-checklist

feat: add Model Used section to PR template and checklist

.github/PULL_REQUEST_TEMPLATE.md

@@ -38,9 +38,25 @@
 
 -
 
+## Model Used
+
+<!--
+  Required. Specify which AI model was used to produce or assist with
+  this change. Be as descriptive as possible — include:
+    • Provider and model name (e.g., Claude, GPT, Gemini, Codex)
+    • Exact model ID or version (e.g., claude-opus-4-6, gpt-4-turbo-2024-04-09)
+    • Context window size if relevant (e.g., 1M context)
+    • Reasoning/thinking mode if applicable (e.g., extended thinking, chain-of-thought)
+    • Any other relevant capability details (e.g., tool use, code execution)
+  If no AI model was used, write "None — human-authored".
+-->
+
+-
+
 ## Checklist
 
 - [ ] I have included a thinking path that traces from project context to this change
+- [ ] I have specified the model used (with version and capability details)
 - [ ] I have run tests locally and they pass
 - [ ] I have added or updated tests where applicable
 - [ ] If this change affects the UI, I have included before/after screenshots