diffmind 0.1.1

AI-powered commit message generator (CLI + git hook) with delightful terminal UX

DiffMind

Human‑quality commit messages. Zero hassle.

AI‑assisted commit message generator with a delightful terminal UX and a one‑command Git hook. Works offline (heuristics) and gets even better with OpenAI.

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Highlights

• Polished commit messages for your staged changes
• Beautiful terminal UI (emoji‑friendly, powered by Rich)
• One‑liner Git hook to auto‑fill commit messages
• Works offline by default; seamlessly upgrades to OpenAI when available
• Simple config with sane defaults; interactive refine/edit session

Demo

Install

Requires Python 3.8+.

PyPI

• pipx (recommended, isolated CLI)

pipx install diffmind

• pipx with OpenAI extras

pipx install "diffmind[ai]"

• pip (core, offline)

pip install -U diffmind

• pip with OpenAI extras

pip install -U "diffmind[ai]"

Upgrade / uninstall:

• pipx upgrade

pipx upgrade diffmind

• pip upgrade

pip install -U diffmind

• pipx uninstall

pipx uninstall diffmind

• pip uninstall

pip uninstall diffmind

From Source

Option A — editable install (pip):

• Clone

git clone https://github.com/dirusanov/DiffMind.git

• Enter directory

cd DiffMind

• Install (editable) with OpenAI extras

pip install -e ".[ai]"

• Or install (editable) core only

pip install -e .

Option B — development setup (Poetry):

• Clone

git clone https://github.com/dirusanov/DiffMind.git

• Enter directory

cd DiffMind

• Install dependencies

poetry install

• Verify CLI in venv

poetry run diffmind --help

Quickstart

# One-time setup (detects OpenAI automatically if OPENAI_API_KEY is set)
diffmind init

# Suggest a message for staged changes
diffmind suggest

# Commit with the generated message (and stage all changes)
diffmind commit -a

# Interactive refinement session (arrows + free text)
diffmind session

Add the Git hook (if you skipped it during init):

diffmind hook install

What It Looks Like

┌──────────────────────────── Commit Message Suggestion ────────────────────────────┐
│ ✨ feat: add login form and validation (auth)                                     │
│                                                                                  │
│ - app/auth/LoginForm.tsx: +182 -0                                                │
│ - app/auth/validators.ts: +64 -0                                                 │
│ - i18n/en.json: +12 -0                                                           │
└──────────────────────────────────────────────────────────────────────────────────┘
💡 Use `diffmind commit` to commit with this message.

Interactive actions:

✅ Commit   🔁 Regenerate   ✏️ Edit subject/body   📝 Open in $EDITOR   ➕ Add bullet

Providers

• simple (default) — Fast, offline heuristics based on your staged diff and file paths
• openai (optional) — OpenAI chat completion for highly polished messages

Enable OpenAI:

• Set API key

export OPENAI_API_KEY=sk-...

• Install with extras (pip)

pip install -U "diffmind[ai]"

• Or install provider only (pip)

pip install -U openai

Or run the guided setup:

diffmind config wizard

Configuration

DiffMind reads configuration from the first existing file:

• .diffmind.toml (repo)
• ~/.config/diffmind/config.toml (user)

Example .diffmind.toml:

provider = "auto"        # auto | simple | openai
conventional = true       # Conventional Commit types
emojis = true             # emoji prefix in subject
max_subject_length = 72
scope_strategy = "topdir" # topdir | none
language = "auto"         # auto | en | ru

# OpenAI (optional)
openai_model = "gpt-4o-mini"
# openai_base_url = "https://api.openai.com/v1"

Environment overrides:

• DIFFMIND_PROVIDER
• DIFFMIND_EMOJIS (1/0, true/false)
• DIFFMIND_CONVENTIONAL (1/0, true/false)
• OPENAI_API_KEY (for the OpenAI provider)

Git Hook

• Installs prepare-commit-msg that pre-fills an empty message using DiffMind
• Respects existing messages (never overwrites non‑comment content)

Commands:

diffmind hook install
# ... later
diffmind hook uninstall

Troubleshooting

• OpenAI not detected? Ensure the openai package is installed and OPENAI_API_KEY is set. Run diffmind doctor.
• No staged changes? DiffMind only considers staged files. git add -A first or use diffmind commit -a.
• Prefer manual edits? Use diffmind session and choose “Open in $EDITOR”.

Security & Privacy

• The simple provider never sends code anywhere and runs locally.
• The OpenAI provider sends only the staged diff and prompt context to your configured OpenAI endpoint.
• You control when OpenAI is used (auto/explicit) and can disable it any time.

Contributing

Contributions are welcome! If you plan to add a provider or improve agent flows/prompts, please keep the UX consistent and simple. Open an issue to discuss ideas.

License

MIT