Code Review AI

AI-powered code review that runs locally, works with any OpenAI-compatible LLM, and costs nothing with free-tier APIs.

Multiple specialized agents (security, performance, style, test coverage) review your code in parallel, deduplicate findings across agents, and synthesize everything into one structured report -- all from a rich interactive TUI or a single CLI command.

pipx install code-review-ai && cra interactive
# also works with: pip install code-review-ai

AI_Code_Review.mp4

Why Code Review AI?

Free to run -- works out of the box with NVIDIA and OpenRouter free-tier models
Multi-agent -- 4 built-in agents catch different issue types simultaneously
Full TUI -- git, PR management, provider switching, and config editing in one terminal
Any LLM -- NVIDIA, OpenRouter, Ollama, vLLM, or any OpenAI-compatible endpoint
Extensible -- define custom review agents in YAML, no Python needed
Privacy-first -- runs locally, your code never leaves your machine (unless you choose a cloud API)

Features

Review pipeline:

4 built-in agents (security, performance, style, test coverage) + custom YAML agents
Parallel execution with configurable concurrency
Iterative deepening -- multiple review rounds with convergence detection
Validation loop -- skeptical validator filters false positives
Cross-agent deduplication (exact, location-based, or similarity-based)
Token budget enforcement with automatic diff truncation

Interactive TUI:

Full-screen provider browser -- add, edit, switch LLM providers and models
API key manager -- edit, sync, delete keys across secrets.env and .env
Git commands, PR workflows, findings navigator with triage and PR posting
Tab autocomplete, keyboard shortcuts (Ctrl+A agents, Ctrl+P provider, Ctrl+O repo)

Input/output:

GitHub PR review (--pr owner/repo#123) or local diff (--diff file.patch)
Rich terminal, JSON, and Markdown output formats
SQLite review history with trends and export

Operations:

Prompt injection defense (random delimiters, instruction anchoring)
Cost estimation with per-model pricing
Graceful degradation -- partial results when agents fail
Retry with exponential backoff for transient API errors

Extensibility:

Custom agents defined in YAML (no Python required)
File pattern matching -- agents run only on relevant file types
Provider-agnostic -- any OpenAI-compatible server, including local ones

Quick Start

Install

# Install from PyPI (recommended)
pipx install code-review-ai

# Or with pip
pip install code-review-ai

From source (for development):

git clone https://github.com/minhtribk12/code-review-ai.git
cd code-review-ai
make install  # requires uv

Get Your Keys

You need an LLM API key and a GitHub token to get started:

NVIDIA (recommended) -- powers the default model, Nemotron 3 Super 120B, a 120B MoE model with only 12B active parameters and a 1M token context window:

Go to build.nvidia.com
Sign in with your NVIDIA account (or create one free)
Click any model, then "Get API Key" in the top right
Copy the key (starts with nvapi-)

OpenRouter -- access to 100+ models from multiple providers, many free:

Go to openrouter.ai/keys
Sign in with Google/GitHub
Click "Create Key"
Copy the key (starts with sk-or-)

GitHub Token -- required for PR commands (pr list, pr review, pr create, etc.):

Go to github.com/settings/tokens
Click "Generate new token" (classic) with repo scope
Copy the token and set it in your shell:

export GITHUB_TOKEN=ghp_your-token-here

Or add GITHUB_TOKEN=ghp_your-token-here to your .env file (see below).

Configure

Option A: Interactive setup (easiest) -- on first launch, a provider setup panel appears automatically. Just paste your API key:

 LLM Provider Setup

 > nvidia (no key)       https://integrate.api.nvidia.com/v1
   openrouter (no key)   https://openrouter.ai/api/v1

  Up/Down navigate, Enter input key, c continue, q quit

Keys are saved to ~/.cra/secrets.env and persist across restarts.

Option B: Manual .env file -- create a .env file in your project directory:

vim .env
# or: nano .env, code .env, etc.

LLM_PROVIDER=nvidia
NVIDIA_API_KEY=nvapi-your-key-here

The .env file is loaded automatically on startup. See docs/configuration.md for all settings.

Run

# Interactive TUI (recommended)
cra interactive

# One-shot CLI review
cra review --diff path/to/file.patch
cra review --pr owner/repo#123
cra review --diff file.patch --format json --quiet

Interactive TUI (Recommended)

The TUI (Terminal User Interface) is a full-screen interactive mode that runs entirely in your terminal. It provides git commands, code review, PR management, provider switching, and configuration editing -- all without leaving the terminal.

cra interactive

  code-review-ai v0.1.0
  Tab autocomplete | Ctrl+A agents | Ctrl+P provider | Ctrl+O repo | Ctrl+L graph | Ctrl+D exit

cra> _
------------------------------------------------------------------------
 Branch: main | Repo: acme/app:local | Reviews: 0 | Tokens: 0 | Tier: free

Git Commands

# Read
status                          # git status (branch + changed files)
diff                            # unstaged diff
diff staged                     # staged diff
diff HEAD~3                     # diff against N commits back
log                             # compact log (last 20)
show abc123                     # full commit detail with diff

# Write
branch                          # list local branches
branch switch feat/login        # switch branch
branch create feat/new          # create + switch
add src/main.py                 # stage specific file
commit -m "fix: resolve bug"    # commit staged changes
stash                           # stash / stash pop / stash list
cd ~/projects/other-repo        # change directory (Tab completes paths)

Code Review

review                          # auto-detects unstaged/staged diff
review staged                   # review staged changes only
review HEAD~1                   # review last commit
review --agents security        # single agent
review --format json            # JSON output

PR Commands

# Read
pr list                         # list open PRs
pr show 42                      # PR details
pr diff 42                      # PR diff with syntax highlighting
pr checks 42                    # CI/CD check status
pr review 42                    # run code review on PR

# Write
pr create --fill                # auto-fill from commits
pr merge 42 --strategy squash   # merge with pre-flight checks
pr approve 42                   # approve PR

# Workflow
pr mine                         # your open PRs
pr assigned                     # PRs where you're reviewer
pr stale --days 14              # stale PRs
pr ready                        # PRs ready to merge
pr conflicts                    # PRs with merge conflicts
pr summary --full               # dashboard overview

Findings Navigator

After a review, navigate, triage, and post findings to PRs:

findings                        # navigate last review
findings 42                     # navigate saved review #42

Key bindings: Up/Down navigate, f filter, s/S sort forward/backward, m solved, F false positive, I ignored, p post to PR, P unpost from PR, d delete, c copy, q quit. Triage state (solved, false positive, ignored) is persisted to SQLite across sessions.

Other Commands

config                          # show all settings
config edit                     # full-screen config editor (paste supported)
config set llm_temperature 0.3  # session override
config reset                    # reload from .env (preserves API keys)
config factory-reset            # full reset (clears history, keeps keys)
config clean                    # remove all tool data from ~/.cra/ (confirmation panel)
# Provider management
provider                        # full-screen provider browser (alias: pv)
provider add                    # add custom provider (wizard)
provider list                   # table view of all providers
provider models nvidia          # list models for a provider
provider remove my-custom       # remove a user-defined provider
history                         # past reviews
history trends --days 30        # aggregated stats
usage                           # session token/cost stats
watch --interval 10             # continuous monitoring
agents                          # list all agents (built-in + custom)

Provider Browser

Run provider or pv to open the full-screen provider/model browser:

 Provider Browser  (Up/Down navigate, Enter expand, a add provider, m add model, d delete, i edit, q quit)

 > v nvidia  [built-in]  https://integrate.api.nvidia.com/v1  (5 models)
       nvidia/nemotron-3-super-120b-a12b  (Nemotron 3 Super 120B free, 1,000,000 ctx)
       nvidia/nemotron-3-nano-30b-a3b  (Nemotron 3 Nano 30B free, 1,000,000 ctx)
   > openrouter  [built-in]  https://openrouter.ai/api/v1  (6 models)
   > ollama  [custom]  http://localhost:11434/v1  (1 models)

Key bindings: Enter expand/collapse, a add provider, m add model to selected provider, d delete (custom only), i edit any field (works on built-in too), q quit.

See the Interactive Guide for the full command reference.

CLI Usage

For one-shot reviews and CI/CD integration, use the CLI directly:

Review Commands

# Local diffs
cra review --diff changes.patch
cra review --diff changes.patch --agents security,performance
cra review --diff changes.patch --format json --output report.json

# GitHub PRs (requires GITHUB_TOKEN)
cra review --pr owner/repo#123
cra review --pr https://github.com/owner/repo/pull/123

# Open findings navigator after review
cra review --diff changes.patch --findings

Token Tiers

Token tiers let you match the tool's behavior to your API plan. The tool itself is completely free -- tiers only control how much context is sent per review so you can stay within your API provider's token limits. If you use a free-tier API (like NVIDIA or OpenRouter free models), you pay nothing at all.

Tier	Default Agents	Budget	When to Use
`free`	security	5k tokens	Free-tier APIs (NVIDIA, OpenRouter free models)
`standard`	all 4 built-in	16k tokens	Pay-as-you-go APIs with 32k context models
`premium`	all 4 built-in	48k tokens	Pay-as-you-go APIs with 128k+ context models

The tier is auto-detected from the model's context window when possible. You can override with config set token_tier standard or --agents / MAX_PROMPT_TOKENS on the CLI.

Custom Agents

Define domain-specific agents in YAML without writing Python:

# ~/.cra/agents/django_security.yaml
name: django_security
description: "Django-specific security review"
system_prompt: |
  You are a Django security expert. Focus on:
  - CSRF token usage in views
  - SQL injection via raw() and extra()
  - Insecure deserialization with pickle
priority: 10
file_patterns:
  - "*.py"

# Use custom agents alongside built-in ones
cra review --diff changes.patch --agents security,django_security

See docs/custom-agents.md for the full guide and the CLI Guide for all flags and CI/CD integration.

Architecture

CLI (Typer) / Interactive REPL
  |
  v
Orchestrator
  |-- Token budget enforcement (truncate oversized diffs)
  |-- Prompt injection scan
  |-- Agent dispatch (parallel, ThreadPoolExecutor)
  |     |-- [Security Agent]      \
  |     |-- [Performance Agent]    |-- built-in
  |     |-- [Style Agent]          |
  |     |-- [Test Coverage Agent] /
  |     |-- [Custom YAML Agents]  --- file_patterns filtering
  |-- Cross-agent deduplication
  |-- Iterative deepening loop (convergence-based)
  |-- Synthesis (LLM merges findings into summary + risk level)
  |-- Validation loop (skeptical validator filters false positives)
  |
  v
ReviewReport -> Rich terminal / JSON / Markdown
            -> SQLite history storage
            -> Findings navigator (interactive triage + PR posting)

See docs/architecture.md for full design details.

For the full command reference with all flags, smart behaviors, and workflows, see the detailed guides:

Interactive Guide -- all TUI commands, findings navigator, PR workflows
CLI Guide -- one-shot CLI commands, flags, CI/CD integration, exit codes

Documentation

Document	Description
docs/interactive-guide.md	TUI commands, findings navigator, PR workflows
docs/cli-guide.md	One-shot CLI commands, flags, CI/CD integration
docs/architecture.md	System design, pipeline flow, component responsibilities
docs/configuration.md	All settings, provider URL resolution, secrets handling
docs/data-models.md	Pydantic models, StrEnums, LLM contracts
docs/custom-agents.md	YAML agent schema, examples, discovery, file patterns

Development

make install    # Install dependencies
make fmt        # Auto-format code
make lint       # Run ruff linter
make typecheck  # Run mypy (strict mode)
make test       # Run pytest with coverage
make check      # lint + typecheck + test

Test Suite

650+ unit tests covering models, config, LLM client, agents, agent loader, CLI, report, orchestrator, deduplication, GitHub client, and the interactive TUI.

Project Structure

src/code_review_agent/
  agents/
    base.py              # BaseAgent ABC with priority + validation
    security.py          # OWASP-focused security review
    performance.py       # Complexity, memory, I/O analysis
    style.py             # Naming, readability, dead code
    test_coverage.py     # Missing tests, edge cases
  interactive/
    commands/            # REPL commands (git, pr, review, config, etc.)
    tabs/                # Textual TUI tabs
    completers.py        # Tab completion
    provider_browser.py  # Full-screen provider/model browser
    provider_cmd.py      # Provider management commands
    repl.py              # REPL loop, dispatch, toolbar
    session.py           # Session state, PR cache
    startup_keys.py      # First-launch provider key setup panel
  agent_loader.py        # Custom YAML agent discovery + loading
  config.py              # Settings with pydantic-settings
  providers.py           # Provider registry (bundled + user ~/.cra/providers.yaml)
  provider_registry.yaml # Bundled provider/model knowledge base
  connection_test.py     # LLM connection verification
  dedup.py               # Cross-agent finding deduplication
  github_client.py       # GitHub API (PR read + write + rate limiting)
  llm_client.py          # OpenAI-compatible client with retry + JSON parsing
  main.py                # Typer CLI entry point
  models.py              # Pydantic models + StrEnums
  orchestrator.py        # Agent dispatch, deepening, validation, synthesis
  prompt_security.py     # Prompt injection defense
  report.py              # Rich terminal + Markdown rendering
  storage.py             # SQLite review history
  token_budget.py        # Tiers, budgets, cost estimation

tests/                   # 650+ unit tests
docs/                    # Architecture, configuration, models, custom agents

License

Apache License 2.0 -- see LICENSE for details.

Name		Name	Last commit message	Last commit date
Latest commit History 34 Commits
.github		.github
docs		docs
src/code_review_agent		src/code_review_agent
tests		tests
.env.example		.env.example
.gitignore		.gitignore
.pre-commit-config.yaml		.pre-commit-config.yaml
.python-version		.python-version
.secrets.baseline		.secrets.baseline
CHANGELOG.md		CHANGELOG.md
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
Dockerfile		Dockerfile
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
SECURITY.md		SECURITY.md
pyproject.toml		pyproject.toml
uv.lock		uv.lock

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Code Review AI

Why Code Review AI?

Features

Quick Start

Install

Get Your Keys

Configure

Run

Interactive TUI (Recommended)

Git Commands

Code Review

PR Commands

Findings Navigator

Other Commands

Provider Browser

CLI Usage

Review Commands

Token Tiers

Custom Agents

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Project Structure

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Code Review AI

Why Code Review AI?

Features

Quick Start

Install

Get Your Keys

Configure

Run

Interactive TUI (Recommended)

Git Commands

Code Review

PR Commands

Findings Navigator

Other Commands

Provider Browser

CLI Usage

Review Commands

Token Tiers

Custom Agents

Architecture

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Development

Test Suite

Project Structure

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