ci : improve action for duplicate issue (#20772)

* ci : show thinking traces of the agent

* cont : increase thinking

* cont : remove agent files

* cont : move the model selection to the provider

.github/workflows/ai-issues.yml

@@ -31,11 +31,18 @@ jobs:
               "webfetch": "deny"
             }
         run: |
-          opencode run -m llama.cpp-dgx/gpt-oss-120b-hf-low "A new issue has been created:
+          rm AGENTS.md
+          rm CLAUDE.md
+
+          opencode run -m llama.cpp-dgx/ai-review-issues-find-similar --thinking "A new issue has been created:
 
           Issue number: ${{ github.event.issue.number }}
 
-          Lookup this issue with `gh issue view ${{ github.event.issue.number }} --json title,body,url,number`
+          Lookup the contents of the issue using the following command:
+
+          ```bash
+          gh issue view ${{ github.event.issue.number }} --json title,body,url,number
+          ```
 
           Perform the following task and then post a SINGLE comment (if needed).