prgen-cli 0.2.1

Generate PR titles and descriptions from git diff

prgen

Generate a pull request title and description from git diff and commit history.

Author: Jean Paul Fernandez · github.com/jpxoi/prgen

Licensed under the GNU General Public License v3.0 (GPL-3.0-only): you may share and modify this program under those terms; see the license file for full conditions.

Requirements

• Python 3.10+
• git on your PATH (install Git and ensure git works in a terminal)

Install

From PyPI, install the prgen-cli package; the prgen command is what you run in the terminal.

From PyPI:

pip install prgen-cli
# or
uv tool install prgen-cli

From a clone (installs all dependencies):

uv sync

Formatting / lint (see [tool.ruff] in pyproject.toml):

uv run ruff format .
uv run ruff check .

Setup

Store settings in ~/.config/prgen/config.json using prgen config (interactive prompts, or prgen config set …). Supported fields:

• OPENAI_API_KEY — OpenAI API key (also merged into the environment when you run prgen, if not already set)
• GOOGLE_API_KEY — Google AI Studio / Gemini API key (same behavior)
• base — optional default for --base (see Defaults below)
• provider — optional default for --provider
• tier — optional default for --tier

Override the config directory with XDG_CONFIG_HOME (file is $XDG_CONFIG_HOME/prgen/config.json).

Defaults

Defaults apply to the main prgen command (generating a PR summary), not to prgen config … subcommands.

Built-in CLI defaults (no config file)

If you do not pass a flag and the key is not set in config.json, prgen uses:

What	Default	Meaning
Git repo	current directory	Diff and log are for the repo you run from. Use -C / --repo for another tree.
--base	origin/main	Compare HEAD to this ref (git diff / git log vs merge base). The ref must exist locally (e.g. run git fetch origin or use a local branch like main).
--provider	auto	Pick a backend from your API keys: Gemini if GOOGLE_API_KEY is set, otherwise OpenAI if OPENAI_API_KEY is set. If neither is set, prgen exits with an error until you configure keys.
--tier	default	Cheaper/faster model preset. pro selects a stronger model for the chosen provider.
--model	(unset)	Use the model for the current --tier (see presets in the source under defaults.py). --model ID overrides --tier entirely.
--context	none	Extra text merged into the prompt; the literal string none means “no extra context” unless you change it.

Optional overrides from config.json

If base, provider, or tier appear in config.json, they replace the built-in defaults only when you do not pass the matching flag.

• Example: base in JSON is main, and you run prgen with no --base → effective base is main.
• Example: same config, but you run prgen --base origin/main → --base wins; the file is ignored for that run.

--model and --context are not read from the JSON file; only base, provider, and tier are.

Summary

• Config file fills in --base, --provider, and --tier when those flags are omitted.
• Explicit flags always override the file.
• auto chooses Gemini vs OpenAI from which API keys are available (see --provider above).

Set keys from the CLI

Writes go to ~/.config/prgen/config.json (see prgen config path). Allowed keys: OPENAI_API_KEY, GOOGLE_API_KEY, base, provider, tier.

prgen config                    # wizard: API keys + base, provider, tier (Rich prompts)
prgen config set OPENAI_API_KEY sk-...
prgen config set GOOGLE_API_KEY - < key.txt    # value read from stdin
prgen config unset OPENAI_API_KEY
prgen config show                              # safe summary (keys as set/unset; colors if TTY)
prgen config path                              # print path to the file

Run on another project

Use -C (same idea as git -C) so you can run prgen from anywhere:

prgen -C ~/src/my-application

If prgen is not on your PATH, invoke it via uv from the prgen repo:

uv run --directory /path/to/prgen prgen -C ~/src/my-application

Install globally (optional)

From the prgen project directory:

uv tool install .
# or
pipx install .

Then prgen is available in new shells (ensure your tool install bin directory is on PATH).

Options

See prgen --help for all flags. In addition to Defaults:

• If there is no diff and no commits compared to --base, prgen exits with an error (nothing to summarize).