Mirror CLI
Intro
**Mirror CLI** is a newly tracked term on FastToolHub's radar. Source signal: X+Web. Radar summary: Reflection open-sourced Mirror CLI (beta), the terminal coding agent / harness Beam was trained against, alongside Beam 1.0 open weights on Oct 16. Install via `uv tool install reflection-mirror` or the reflection-oss/mirror-beta installer; defaults to Beam-1.0-501B-A23B, supports worktrees, MCP, ACP. Launch post by @nayshins had 17k views; Misha Laskin's and Reflection's posts mention it.
Explain
Mirror CLI appears in the model / AI-system category: something teams would load, call, or fine-tune rather than a pure UI gadget. Mentions point at agent workflows — coding agents, computer-use, or tool-using loops. Open-source or public-repo signals show up in the excerpt, so inspection and self-hosting may be possible. Do not invent parameters, prices, or benchmarks beyond what the excerpt already states.
Usage
Start from the primary link: https://developers.reflection.ai/mirror-overview. For models: verify context length, license, and hardware needs from official docs; run a small smoke test before production. For agent/product tools: try a narrow workflow first, keep secrets out of prompts, and log failures for later replay. Numbers and claims in this page only repeat the radar excerpt — double-check upstream before publishing.