rune

A minimal terminal coding agent in Go. Inspired by pi-mono.

rune ships with read/write/edit/bash tools, branching sessions with compaction, markdown skills, and MCP plugin support. It runs against ChatGPT Pro/Plus subscriptions via OAuth, and Groq via API key.

Quick start

curl -fsSL https://raw.githubusercontent.com/khang859/rune/main/install.sh | sh

rune                      # interactive mode
# then use /providers or /settings to choose/configure a provider
# Codex: rune login codex  # opens a browser to auth via your ChatGPT account
# Groq: export GROQ_API_KEY=... && rune --provider groq
# Ollama: ollama pull llama3.2 && rune --provider ollama --model llama3.2

The installer downloads the latest GitHub release for macOS or Linux and can be rerun later to update rune.

If you have Go installed, you can also install or update from source:

go install github.com/khang859/rune/cmd/rune@latest

Usage

Mode	How
Interactive	rune
One-shot	rune --prompt "fix the test in ./foo_test.go"
Headless smoke	rune --script script.json
Version	rune --version

Commands

Type / in the editor to see all commands. Highlights:

• /providers — switch provider, e.g. Codex or Groq
• /model — switch model for the active provider
• /tree — jump to any point in the session
• /resume — pick a previous session
• /compact — summarize history
• /plan — enter safe planning mode; edits and bash are disabled, and MCP tools require a read-only allowlist
• /approve — approve a plan and implement it in a new session
• /cancel-plan — clear pending plan state while staying in plan mode
• /skill:<name> — invoke a markdown skill
• /skill-creator — get guided help drafting or improving a rune skill
• /feature-dev — start a guided feature-development workflow with specialist subagents
• /quit — exit

See docs/keybindings.md for the full key map, docs/plan-mode.md for Plan Mode details, docs/feature-dev.md for the feature workflow, and /hotkeys for in-app help.

Customization

• Skills — drop a .md file into ~/.rune/skills/ or ./.rune/skills/. See docs/skills.md.
• Custom subagents — drop a .md file into ~/.rune/agents/ or ./.rune/agents/. See docs/subagents.md.
• MCP plugins — configure ~/.rune/mcp.json. See docs/mcp.md.
• Project context — rune walks up from the cwd collecting AGENTS.md.

Providers

Codex remains the default provider. Groq can be selected with --provider groq, RUNE_PROVIDER=groq, or /providers in the TUI. Ollama can be selected with --provider ollama after pulling a local model, e.g. ollama pull llama3.2. Groq keys are read from RUNE_GROQ_API_KEY, GROQ_API_KEY, or can be stored via /settings. See docs/providers.md.

Web tools

rune can optionally expose web tools to the agent:

• web_search — search the web for relevant pages.
• web_fetch — fetch a specific HTTP(S) URL.

web_fetch is available when enabled in settings. web_search requires a configured search provider. For Brave Search or Tavily, set:

export RUNE_BRAVE_SEARCH_API_KEY="..."
# or
export RUNE_TAVILY_API_KEY="tvly-..."
export RUNE_WEB_SEARCH_PROVIDER="tavily"

Or configure it interactively with /settings and paste the key into the masked popup. See docs/web.md for details and security notes.

Development

make all      # vet + fmt + test + build
make test     # tests only
make build    # build binary

See docs/architecture.md.

License

MIT.