Reflexive

Reflexive - Ai's missing debugger


[View full video (mp4)](demo1_clipped_4x.mp4)

Reflexive is like puppeteer but for the cli, it embeds Claude inside your running application. It sees logs, reads source, edits files, sets breakpoints, and responds to runtime events.

**Supports:** Node.js, Python, Go, .NET, Rust

Quickstart

# Node.js
echo "console.log('hello')" > app.js
npx reflexive --write app.js

# Python
echo "print('hello')" > app.py
npx reflexive --write app.py

# Open http://localhost:3099 and chat with your app

Oneliner

npm i -g reflexive
echo "console.log('hello')" > app.js; reflexive --write --inject --open app.js

What This Is

   Claude Agent SDK (Claude Code as a library) + your running application = an agent that:

• Agent loop - keeps working until done, tool calls, retries, reasoning
• Process lifecycle - start, stop, restart, watch for file changes
• Multi-language debugging - breakpoints, stepping, scope inspection (Node.js, Python, Go, .NET, Rust)
• Watch triggers - pattern-match logs and auto-prompt the agent
• File read/write + shell - behind explicit flags

+---------------------------------------------------------+
|  reflexive CLI                                          |
|  - Dashboard server (chat UI + logs)                    |
|  - Claude Agent SDK with MCP tools                      |
|  - Process control, file ops, shell                     |
|                                                         |
|  +---------------------------------------------------+  |
|  |  your-app.js / app.py / main.go (child process)   |  |
|  |  - stdout/stderr captured                         |  |
|  |  - Optional: deep instrumentation (Node.js)       |  |
|  +---------------------------------------------------+  |
+---------------------------------------------------------+

Safety Model

**Default is read-only.** No flags = agent can see logs, read files, ask que