drep

A local commit gate. It runs the linters your repository already configures, and sends the code you changed to an LLM for review.

curl --proto '=https' --tlsv1.2 -LsSf \
  https://github.com/slb350/drep/releases/latest/download/drep-ai-installer.sh | sh

What it does

On git commit and git push, drep checks your changes twice.

Your linters are precise, so their findings block. A model's opinion about naming is not precise at any severity, so it informs instead. Splitting by source rather than by severity is what makes the gate calibratable; opt the LLM into blocking with --fail-on error when you want it.

drep is a single binary. It talks to no source-control platform, runs no server, and needs no drep account. The deterministic half needs no model and no API key at all. Semantic review can use an HTTP API or a separately installed Codex CLI authenticated through a ChatGPT subscription.

Install

# Shell installer (macOS and Linux, x86_64 and arm64)
curl --proto '=https' --tlsv1.2 -LsSf \
  https://github.com/slb350/drep/releases/latest/download/drep-ai-installer.sh | sh

# Homebrew
brew install slb350/tap/drep

# crates.io
cargo install drep-ai

# Current main branch
cargo install --git https://github.com/slb350/drep drep-ai

The crate is drep-ai because drep was taken on crates.io. The binary is drep.

Set up a repository

cd your-repo
drep init                              # interactive: pick a provider, paste a key,
                                       # choose from the models it actually serves
drep init --provider openrouter        # HTTP API
drep init --provider codex             # ChatGPT/Codex subscription
# Other presets: local, zai, minimax, kimi, openai, custom
export OPENROUTER_API_KEY='...'

drep init writes two things: a drep.toml naming your model, and a git hook. The default is a pre-push hook; --hooks pre-commit or --hooks both if you want the gate earlier, --hooks none for the config alone.

The interactive path fills in temperature and max_tokens for the model you picked rather than for its provider, using a weekly-refreshed copy of models.dev. It only ever removes a parameter or lowers a required ceiling, never the reverse, so a model that refuses temperature gets no temperature line and k3 gets its own 131,072 instead of a number chosen for the endpoint. Offline, or for a model too new to be listed, the provider's defaults are written and setup carries on. DREP_QUIRKS_PATH points drep at a different cache.

It writes native git hooks rather than a pre-commit entry, and it handles core.hooksPath: if you have a global hooks directory, a repository-local hook would otherwise never fire, silently.

To adopt drep through pre-commit instead:

repos:
  - repo: https://github.com/slb350/drep
    rev: v2.3.0
    hooks:
      - id: drep-check-push   # pre-push: what the push touches
      # - id: drep-check      # pre-commit: staged files
      # - id: drep-lint-docs  # markdown, rule-based

Commands

drep check                      # this directory
drep check src/ main.go         # named files or directories
drep check --staged             # what is staged, for a pre-commit hook
drep check --diff origin/main   # what changed since a ref, for pre-push
drep check --fail-on error      # also block on LLM findings
drep check --format json        # machine-readable

drep lint-docs                  # markdown in this tree
drep lint-docs --staged --fail-on error
drep doctor                     # what will actually run here

Exit codes, shared by check and lint-docs:

Exit 2 is the one that matters. An unreachable endpoint, a file too large for the model, a configured tool that is not installed: none of those are a pass, and a gate that reports them as one is worse than no gate.

What will run here

$ drep doctor
drep in /Users/you/your-repo
============================================================

Languages found:
  Go: 12 file(s)         Python: 48 file(s)      TypeScript: 31 file(s)

Deterministic checks (these gate):
  ruff: ready
  gofmt: ready
  go vet: ready
  eslint: not configured (add one of: eslint.config.js, ...)
  tsc: configured but NOT INSTALLED - these checks will not run

LLM analysis (required):
  1. deepseek/deepseek-v4-pro-0813 at https://openrouter.ai/api/v1

Three rules decide what runs:

• Repository-local before PATH, so a project is checked by the version its CI runs.
• Only where the project configured it. No eslint config means no eslint opinion.
• A configured tool that is missing makes the run exit 2. A check that did not run is never reported as a pass.

Languages

The LLM half reads any of them. It parses nothing, so it needs no grammar per language; it is told which language it is reading and which conventions that language's ecosystem expects.

Markdown

drep lint-docs is rule-based only: no LLM, no network, no config file. Ten checks, and their severity answers one question, which is whether the finding changes how the document renders.

An unclosed fence turns every line below it into code, so it alone blocks by default. Whitespace renders identically, so it does not. --strict is the shorthand for --fail-on info, which blocks on everything; over a real repository that is dominated by line length, and a hook that blocks a commit over a long line is a hook that gets deleted.

Configuration

drep.toml, written by drep init:

[[llm]]
endpoint = "https://openrouter.ai/api/v1"
model = "deepseek/deepseek-v4-pro-0813"
api_key = "${OPENROUTER_API_KEY}"
timeout_secs = 1800

HTTP is the default backend, so existing configurations remain valid without a backend field. OpenAI API usage is the openai preset and uses per-token API billing:

drep init --provider openai
export OPENAI_API_KEY='...'

ChatGPT/Codex subscription usage is a separate backend. Install the official Codex CLI, follow the Codex authentication guide to run codex login, then select the codex preset:

codex login
drep init --provider codex

[[llm]]
backend = "codex"
model = "gpt-5.6-sol"
reasoning_effort = "high"
timeout_secs = 1800
max_concurrent = 1

This mode consumes the ChatGPT/Codex plan allowance, not OpenAI API credits. drep never reads or stores the subscription tokens: Codex owns login and token refresh. Every review is an ephemeral, non-interactive, read-only Codex run in an empty directory with tools, apps, MCP, hooks, memories, user configuration, and project instructions disabled. drep doctor verifies the installed CLI and ChatGPT-managed authentication without printing account details.

drep init does not write your key into this file. Keys go to a per-machine store (~/.config/drep/auth.toml, mode 0600, keyed by endpoint), so drep.toml carries only the provider choice:

drep auth list                                   # endpoints held; never the keys
drep auth login --provider kimi                  # paste a key, no echo
drep auth logout --endpoint https://api.kimi.com/coding/v1

api_key = "${VAR}" still works and takes precedence over a stored key, which is what CI wants — there is nobody to paste anything there. DREP_AUTH_PATH points drep at a different store.

By default drep init also adds drep.toml to .gitignore; pass --no-gitignore to commit it instead and share the provider choice with the repository.

[[llm]] is an array of tables, and the order is a failover chain. Each entry is tried in turn: a timeout, a refused connection, a 429, a 5xx or an empty answer falls through to the next one. A 401 or 403 does not, because that is a broken key and falling back would hide it. Set enabled = false on an entry to park it without deleting it.

# Local model first, cloud when it is not running.
[[llm]]
endpoint = "http://localhost:1234/v1"
model = "qwen3-30b-a3b"

[[llm]]
endpoint = "https://openrouter.ai/api/v1"
model = "deepseek/deepseek-v4-pro-0813"
api_key = "${OPENROUTER_API_KEY}"

Subscription coding plans

drep init has presets for three of them, so a plan you already pay for can run the gate instead of per-token API billing:

drep init --provider zai       # GLM 5.3, OpenAI-compatible
drep init --provider minimax   # MiniMax M3, Anthropic protocol
drep init --provider kimi      # Kimi k3, Anthropic protocol

Two of those endpoints expose the Anthropic messages API rather than chat completions, which is what protocol selects:

[[llm]]
endpoint = "https://api.minimax.io/anthropic/v1"
model = "MiniMax-M3"
api_key = "${MINIMAX_API_KEY}"
protocol = "anthropic"

protocol defaults to openai, so an existing file needs no change. doctor tags a non-default protocol in its listing.

Check the plan's own terms before pointing a commit gate at it. They are not uniform, and some restrict a subscription to a named list of client tools or to interactive use.

Other keys

temperature (unset means the parameter is not sent at all, which is what some models require — k3 and gpt-5.6-sol reject any value), max_tokens (unset by default, so a reasoning model is never truncated mid-thought; a few endpoints refuse a request without it), max_retries, max_concurrent.

Both are properties of the model rather than the endpoint, which is why the wizard resolves them per model. Editing either by hand always wins: drep reads the file as written and never revisits it.

Development

cargo test --all-targets --all-features
cargo clippy --all-targets --all-features     # levels come from [lints] in Cargo.toml
cargo mutants                                 # a green suite is not a discriminating one

docs/technical-design.md is the architecture. CLAUDE.md carries the invariants, each with the defect that produced it.

History

Versions up to 1.3.0 were a Python package (drep-ai on PyPI) that also ran a webhook server, posted reviews to Gitea, GitHub and GitLab, generated docstrings and kept a SQLite cache. 2.0 is a rewrite in Rust and keeps only the local gate. The PyPI releases stay up; nothing new is published there.

License

MIT. See LICENSE.