diff --git a/.github/workflows/pr-agent.yaml b/.github/workflows/pr-agent.yaml
index f26a6785..20e66b9e 100644
--- a/.github/workflows/pr-agent.yaml
+++ b/.github/workflows/pr-agent.yaml
@@ -20,10 +20,11 @@ jobs:
           LLM_PROVIDER: gemini
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
           LLM_MODEL: gemini-1.5-flash
+          MODEL: gemini/gemini-1.5-flash
+          FALLBACK_MODELS: ""
           # Enable summary comments on PRs
           PR_SUMMARIZER: true
-          # Optionally enable full reviews/checklists. Set to true if desired.
-          PR_REVIEWER: false
+          # Optionally enable full reviews/checklists. Omit to avoid settings shape issues
           # Optional: model/provider tuning (defaults work fine)
           # GEMINI_API_BASE: ${{ secrets.GEMINI_API_BASE }}
           # LLM_TEMPERATURE: "0.2"