ci: support GEMINI_MODEL repository variable in triage-issue workflow

Author: dkhawk

.github/scripts/answer_issue.py

@@ -46,8 +46,8 @@ def validate_response(response_text: str) -> bool:
     return True
 
 def get_gemini_response(api_key, system_instruction, user_content):
-    # Using gemini-3.5-flash for fast and reliable answering
-    url = f"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.5-flash:generateContent?key={api_key}"
+    model = os.getenv("GEMINI_MODEL", "gemini-3.8-flash")
+    url = f"https://generativelanguage.googleapis.com/v1beta/models/{model}:generateContent?key={api_key}"
     headers = {'Content-Type': 'application/json'}
     data = {
         "system_instruction": {

.github/scripts/triage_issue.py

@@ -35,8 +35,8 @@ def sanitize_content(text: str) -> str:
     return text.replace("</issue_content>", "&lt;/issue_content&gt;").replace("<issue_content>", "&lt;issue_content&gt;")
 
 def get_gemini_response(api_key, system_instruction, user_content):
-    # Using the stable Gemini 3.5 Flash
-    url = f"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.5-flash:generateContent?key={api_key}"
+    model = os.getenv("GEMINI_MODEL", "gemini-3.8-flash")
+    url = f"https://generativelanguage.googleapis.com/v1beta/models/{model}:generateContent?key={api_key}"
     headers = {'Content-Type': 'application/json'}
     data = {
         "system_instruction": {

.github/workflows/triage-issue.yml

@@ -51,6 +51,7 @@ jobs:
         id: run_script
         env:
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
+          GEMINI_MODEL: ${{ vars.GEMINI_MODEL }}
           ISSUE_TITLE: ${{ github.event.issue.title || github.event.inputs.title }}
           ISSUE_BODY: ${{ github.event.issue.body || github.event.inputs.body }}
         run: |
@@ -85,6 +86,7 @@ jobs:
         if: github.event_name == 'workflow_dispatch' || github.event.action == 'opened'
         env:
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
+          GEMINI_MODEL: ${{ vars.GEMINI_MODEL }}
           ISSUE_TITLE: ${{ github.event.issue.title || github.event.inputs.title }}
           ISSUE_BODY: ${{ github.event.issue.body || github.event.inputs.body }}
         run: |