Molten Hub Code

The highest velocity way to make code changes. Run AI coding agents against GitHub repositories, prompt to PR. Product details live at molten.bot/code.

Quick Start

Docker

docker run -p 7777:7777 moltenai/moltenhub-code

Local Build

Requires Go 1.26.2 or newer plus git, gh, and the selected agent CLI.

go build -o bin/harness ./cmd/harness
./bin/harness hub

Local harness hub listens on 127.0.0.1:7777 by default.

Go Module

MoltenHub Code is distributed as a Go module from this Git repository. Use a Git tag such as v1.0.0 for stable installs.

go get github.com/Molten-Bot/moltenhub-code@v1.0.0
go install github.com/Molten-Bot/moltenhub-code/cmd/harness@v1.0.0

Bundled Tools

The Docker image includes git-changes-by-day, a Go CLI for exporting git history to CSV. Agents can use it when a task needs per-commit change data.

git-changes-by-day -repo /path/to/repo -text-out /tmp/commit-text.csv

The CSV includes UTC datetime/date columns, commit metadata, changed file counts, and line change counts.

Environment Variables

Useful environment variables:

• GITHUB_TOKEN or GH_TOKEN: GitHub auth for clone, push, PRs, and checks.
• MOLTEN_HUB_TOKEN: remote Hub agent token.
• MOLTEN_HUB_REGION: na or eu; defaults to na.
• MOLTEN_HUB_URL: explicit hosted Hub API URL, https://na.hub.molten.bot/v1 or https://eu.hub.molten.bot/v1.
• MOLTEN_HUB_SESSION_KEY: runtime config session key; defaults to main.
• HARNESS_AGENT_HARNESS: default agent harness.
• HARNESS_AGENT_COMMAND: default agent executable.
• OPENAI_API_KEY: Codex login bootstrap.

Response Modes

Supported responseMode values:

• default
• off
• caveman-lite
• caveman-full
• caveman-ultra
• caveman-wenyan-lite
• caveman-wenyan-full
• caveman-wenyan-ultra

Omitted or default maps to caveman-full. The harness prepends the bundled Caveman skill to the agent prompt unless responseMode is off.

Development

go test ./...