Built a CLI coding agent in Rust. Works with Gemini, Claude, GPT. 1M context. Single 12MB binary.

Tech: - tokio + reqwest for async/streaming - clap + rustyline for CLI - Canonical message format across all 3 providers - 16 tools (read, write, edit, bash, search, git, MCP) - Safety classifier with per-project policy

The bug that took the longest: Gemini 3 added thoughtSignature at the Part level — sibling of functionCall, not nested inside. Took 3 iterations to get the deserialization right.

Honest split: AI generated ~70% of the code. I did architecture, review, debugging, deployment, QA. The site (forgecli.vercel.app) was also AI-built — one prompt, zero hand-written HTML/CSS.

Links: - github.com/pratikacharya1234/forge - forgecli.vercel.app

Feedback welcome. Break it, tell me what's wrong.