OSCAR — GitHub Coding Assistant for VS Code

AI-powered sidebar assistant for GitHub repository operations. Compare branches, review PRs, analyze diffs, and run commands — all through natural language.

Features

Branch comparison — compare any two branches with LLM-summarized diffs
Code review — get PR-style feedback on branch changes
Git operations — status, log, diff, checkout, commit, push via natural language
Shell commands — run tests, builds, and scripts with safety confirmation
Web search — look up documentation and error messages
Persistent memory — remembers context across sessions
Bring your own LLM — Gemini, OpenAI GPT-5, Anthropic Claude 4, Groq, or local Ollama; switch from the status-bar

Getting Started

Install the extension
Start the OSCAR backend server:
```
pip install oscar-agent
oscar-server
```
Click the OSCAR icon in the VS Code activity bar
Start typing queries in the sidebar chat

Configuration

Setting	Default	Description
`oscar.serverUrl`	`http://127.0.0.1:8420`	URL of the OSCAR backend server

Commands

Command	Description
`OSCAR: Select LLM provider and model`	Pick a provider/model from the catalog. Selected env vars are copied to your clipboard for pasting into `.env` (the backend is restarted to apply).

Example Queries

"Show me the git status"
"Compare main and feature-branch"
"Review the changes on dev vs main"
"What changed in the last 5 commits?"
"Run the test suite"
"Search for Python async best practices"

Architecture

OSCAR uses the Asterix agentic framework with pluggable LLM backends — Gemini (default), OpenAI GPT-5, Anthropic Claude 4, Groq, or local Ollama. The extension communicates with a FastAPI backend that wraps the Asterix agent. Switch providers from the status-bar at any time.

Safety

Destructive operations (git push, dangerous shell commands) require explicit user confirmation before execution. All tool calls are logged to an audit trail.

License

MIT

OSCAR - GitHub Coding Assistant

Aditya Sarade