fix: agent runtime bugs

[MODSetter]

Description

Motivation and Context

FIX #

Screenshots

API Changes

• This PR includes API changes

Change Type

• Bug fix
• New feature
• Performance improvement
• Refactoring
• Documentation
• Dependency/Build system
• Breaking change
• Other (specify):

Testing Performed

• Tested locally
• Manual/QA verification

Checklist

• Follows project coding standards and conventions
• Documentation updated as needed
• Dependencies updated as needed
• No lint/build errors or new warnings
• All relevant tests are passing

High-level PR Summary

This PR fixes two critical runtime bugs in the agent system: first, it addresses a TypeError crash in the summarization middleware caused by AIMessage objects with content=None (common with Azure OpenAI gpt-5.x responses through LiteLLM) by wrapping the upstream middleware with a safe version that sanitizes message content before processing; second, it prevents LLM routing failures where requests were incorrectly routed to wrong endpoints (e.g., OpenRouter requests hitting Azure endpoints) by adding provider-aware default api_base URLs and general-purpose fallback configurations in the LLM router service. The changes also include a LiteLLM version bump from >=1.83.0 to >=1.83.4 and corresponding lock file updates.

⏱️ Estimated Review Time: 30-90 minutes

💡 Review Order Suggestion

Order	File Path
1	surfsense_backend/pyproject.toml
2	surfsense_backend/uv.lock
3	surfsense_web/pnpm-lock.yaml
4	surfsense_backend/app/agents/new_chat/middleware/safe_summarization.py
5	surfsense_backend/app/agents/new_chat/chat_deepagent.py
6	surfsense_backend/app/services/llm_router_service.py

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
surf-sense-frontend	Ready	Preview, Comment	Apr 22, 2026 8:00am

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4c4a7624-4472-435d-b64d-a84e9f19e7ec

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dev_mod

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[recurseml]

Review by RecurseML

🔍 Review performed on 9b56d45..95de054

✨ No bugs found, your code is sparkling clean

✅ Files analyzed, no issues (6)

• surfsense_backend/app/agents/new_chat/chat_deepagent.py
• surfsense_backend/app/agents/new_chat/middleware/safe_summarization.py
• surfsense_backend/app/services/llm_router_service.py
• surfsense_backend/pyproject.toml
• surfsense_backend/uv.lock
• surfsense_web/pnpm-lock.yaml