lumen is a free CLI tool that uses AI to summarise git commits without requiring an API key.

Supported providers

Provider	API Key Required	Models
Groq groq	Yes (free)	llama2-70b-4096, mixtral-8x7b-32768 (default: mixtral-8x7b-32768)
OpenAI openai	Yes	gpt-4o, gpt-4o-mini, gpt-4, gpt-3.5-turbo (default: gpt-4o-mini)
Phind phind (Default)	No	Phind-70B

Installation

Using Homebrew (MacOS and Linux)

brew tap jnsahaj/lumen
brew install lumen --formula

Using Cargo

cargo install lumen

Prerequisites

1. git
2. fzf (optional): Required for lumen list command
3. mdcat (optional): Required for pretty output formatting

Usage

$ lumen --help

# summarise a commit by giving its SHA-1
# eg: lumen explain HEAD
# eg: lumen explain cc50651f
$ lumen explain <commit-sha>

# fuzzy-search (using fzf) commits, and then `explain`
$ lumen list

AI Provider can be configured by using CLI arguments or Environment variables.

-p, --provider <PROVIDER>  [env: LUMEN_AI_PROVIDER] [default: phind] [possible values: openai, phind, groq]
-k, --api-key <API_KEY>    [env: LUMEN_API_KEY]
-m, --model <MODEL>        [env: LUMEN_AI_MODEL]

# eg: lumen --p="openai" --k="<your-api-key>" -m="gpt-4o" explain HEAD
# eg: lumen --p="openai" --k="<your-api-key>" -m="gpt-4o" list