Manaflow Runs Claude, Codex, and Gemini in Parallel to Pick the Best Code
Manaflow is an open-source alternative to Claude Code web, Codex Cloud, and Devin that runs multiple coding agents in parallel with isolated VS Code workspaces.
PRO- Manaflow is an open-source, MIT-licensed alternative to Claude Code web, Codex Cloud, and Devin.
- Spawns Claude Code, Codex, Cursor, Gemini, Amp, and Opencode CLIs in parallel from one prompt.
- Each run gets an isolated VS Code workspace in the cloud or a local Docker container.
- Ships with git diff view, terminal, live dev server preview, and one-click PR creation.
- Crown evaluator ranks outputs from parallel agent runs so you know which diff to merge.
- Heatmap diff viewer color-codes risky code changes to speed up code review.
A new open-source project called Manaflow is taking aim at the growing category of cloud coding agents like Claude Code web, Codex Cloud, Devin, and Ramp Inspect. Rather than locking you into a favorite agent, it treats parallel execution as the primitive and wraps every run in a real IDE.
Manaflow spawns Claude Code, Codex CLI, Cursor CLI, Gemini CLI, Amp, Opencode, and other coding agent CLIs in parallel across multiple tasks. Every run spins up an isolated VS Code workspace, either in the cloud or in a local Docker container, with the git diff view, terminal, and dev server preview ready. You can verify what each agent produced instead of squinting at a scrolling log.
The tab-juggling problem
Anyone running more than one coding agent at a time knows the pain: three terminals open, three scattered VS Code windows, a Notion doc tracking which branch is which, and no easy way to compare diffs side by side. Manaflow targets developers who already use AI coding agents but lose time to that shuffle. Everything consolidates into a single dashboard where you can launch agents, watch them work, and inspect diffs.
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