Add PR-Agent Review

.github/workflows/pr-agent.yaml

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+---
+name: PR Agent
+on:
+  pull_request:
+    types: [opened, synchronize]
+jobs:
+  pr_agent_job:
+    runs-on: ubuntu-latest
+    steps:
+    - name: PR Agent action step
+      uses: the-pr-agent/pr-agent@main
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        OPENAI_KEY: ${{ secrets.OPENAI_KEY }}
+        OPENAI.API_BASE: "https://api.orakel.x-cellent.com/api"
+        pr_reviewer.extra_instructions: "Focus on Golang and Proto best practices, type hints, and docstrings."
+        github_action_config.auto_review: "true"
+        github_action_config.auto_describe: "true"
+        github_action_config.auto_improve: "false"
+        config.verbosity_level: "2"
+        config.model: "Qwen/Qwen3.6-35B-A3B-FP8"

.pr_agent.toml

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+# NOTE: This file is consumed by Qodo's "free for open source" agent
+# (the `qodo-free-for-open-source-projects` bot) — a separate, hosted, closed-source
+# service. It is NOT read by the open-source pr-agent in this repository; some keys
+# below (e.g. the [review_agent] section) only exist in that hosted agent.
+
+[pr_reviewer]
+enable_review_labels_effort = true
+enable_auto_approval = true
+
+[github_app]
+pr_commands = [
+    "/describe --pr_description.publish_description_as_comment=true",
+    "/improve",
+    "/agentic_review"
+]
+
+handle_push_trigger = true
+push_commands = [
+    "/improve",
+    "/agentic_review"
+]