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Rafter -- Security Toolkit for AI Coding Agents

Rafter is a security CLI that protects your codebase from leaked secrets, dangerous commands, and vulnerable dependencies. It works offline with zero config. No API key, no account, no telemetry.

This file teaches AI agents how to install and use Rafter. If you are an AI coding agent, follow these instructions.

Install

# Node.js (recommended)
npm install -g @rafter-security/cli

# Python (full feature parity)
pip install rafter-cli

Initialize for Your Platform

Run rafter agent init with the flag for your platform. This installs hooks, skills, or MCP config automatically.

# Auto-install all detected platforms
rafter agent init --all

# Or pick your platform
rafter agent init --with-claude-code   # Hooks (PreToolUse/PostToolUse) + skills
rafter agent init --with-codex         # Skills
rafter agent init --with-cursor        # MCP server
rafter agent init --with-gemini        # MCP server
rafter agent init --with-windsurf      # MCP server
rafter agent init --with-continue      # MCP server
rafter agent init --with-aider         # MCP server
rafter agent init --with-openclaw      # Skills

# Also download Betterleaks for enhanced scanning (optional, falls back to built-in 21-pattern regex)
rafter agent init --with-claude-code --with-betterleaks

What init does per platform:

Platform Integration type What gets installed
Claude Code PreToolUse/PostToolUse hooks + skills ~/.claude/settings.json (hooks), ~/.claude/skills/rafter/ (skills)
Codex CLI Skills ~/.agents/skills/rafter/
OpenClaw Skills ~/.openclaw/skills/rafter-security.md
Cursor MCP server ~/.cursor/mcp.json
Gemini CLI MCP server ~/.gemini/settings.json
Windsurf MCP server ~/.codeium/windsurf/mcp_config.json
Continue.dev MCP server ~/.continue/config.json
Aider MCP server ~/.aider.conf.yml

Scan for Secrets

Scan files or directories for hardcoded credentials. 21+ built-in patterns (AWS keys, GitHub tokens, Stripe keys, database URIs, private keys, JWTs, etc.). Deterministic -- same input always produces the same output.

# Scan a directory
rafter secrets .

# Scan a specific file
rafter secrets src/config.ts

# Scan only git staged files (use before commits)
rafter secrets --staged

# Scan files changed since a ref
rafter secrets --diff HEAD~1

# JSON output (structured, pipe-friendly)
rafter secrets . --json --quiet

Exit codes (stable contract):

  • 0 -- clean, no secrets found
  • 1 -- secrets detected
  • 2 -- runtime error (bad path, not a git repo)

JSON output schema (--json):

[
  {
    "file": "/absolute/path/to/file.ts",
    "matches": [
      {
        "pattern": { "name": "AWS Access Key", "severity": "critical" },
        "line": 42,
        "redacted": "AKIA************MPLE"
      }
    ]
  }
]

Raw secret values are never included in output.

Pre-Commit Hook

Block commits that contain secrets:

# Current repo
rafter agent install-hook

# All repos on this machine
rafter agent install-hook --global

Command Risk Assessment

Evaluate shell commands against a 4-tier risk policy:

rafter agent exec "npm install"           # low risk -- runs
rafter agent exec "git push --force"      # high risk -- requires approval
rafter agent exec "rm -rf /"              # critical -- blocked
Risk Action Examples
Critical Blocked rm -rf /, fork bombs, dd to device
High Approval required sudo rm, chmod 777, curl|sh, npm publish
Medium Approval on moderate+ sudo, chmod, kill -9
Low Allowed npm install, git commit, ls

Claude Code Hook Integration

When installed via rafter agent init --with-claude-code, Rafter registers hooks in ~/.claude/settings.json:

  • PreToolUse hooks on Bash and Write|Edit tool calls. Every shell command is evaluated against the risk policy before execution. Dangerous commands are blocked or require approval transparently -- no manual invocation needed.
  • PostToolUse hooks on Bash, Write, Edit, and MultiEdit tool calls (Bash|Write|Edit|MultiEdit matcher). Scans command output and file writes for accidentally leaked secrets and redacts them. (Scoped to these tools so the hook doesn't fire on every Read/MCP call, which never produces secrets to redact and only added latency.)

The hooks read JSON from stdin and write a {"decision": "allow"} or {"decision": "deny", "reason": "..."} response to stdout. This is the Claude Code hook protocol.

Manual hook config (if not using rafter agent init):

{
  "hooks": {
    "PreToolUse": [
      { "matcher": "Bash", "hooks": [{ "type": "command", "command": "rafter hook pretool" }] },
      { "matcher": "Write|Edit", "hooks": [{ "type": "command", "command": "rafter hook pretool" }] }
    ],
    "PostToolUse": [
      { "matcher": "Bash|Write|Edit|MultiEdit", "hooks": [{ "type": "command", "command": "rafter hook posttool" }] }
    ]
  }
}

MCP Server

For MCP-native platforms (Cursor, Gemini, Windsurf, Continue.dev, Aider), Rafter exposes tools over stdio:

rafter mcp serve

MCP client config:

{
  "mcpServers": {
    "rafter": { "command": "rafter", "args": ["mcp", "serve"] }
  }
}

Tools provided:

  • scan_secrets -- scan files/directories for secrets
  • evaluate_command -- check if a shell command is allowed by policy
  • read_audit_log -- read security event log with filters
  • get_config -- read current Rafter configuration

Resources:

  • rafter://config -- current configuration
  • rafter://policy -- active security policy

Remote Code Analysis (API)

SAST/SCA security audits on GitHub repos. Requires RAFTER_API_KEY. Code is deleted immediately after analysis.

export RAFTER_API_KEY="your-key"

rafter run                                        # scan current repo (auto-detected)
rafter scan --repo myorg/myrepo --branch main     # scan specific repo
rafter get SCAN_ID                                # retrieve results
rafter get SCAN_ID --format json                  # JSON output
rafter usage                                      # check quota

Exit codes:

  • 0 -- success
  • 1 -- error
  • 2 -- scan not found
  • 3 -- quota exhausted
  • 4 -- forbidden (check API key)

Policy File

Drop .rafter.yml in project root for per-repo security policy:

version: "1"
risk_level: moderate
command_policy:
  mode: approve-dangerous
  blocked_patterns: ["rm -rf /"]
  require_approval: ["npm publish"]
scan:
  exclude_paths: ["vendor/", "third_party/"]
  custom_patterns:
    - name: "Internal API Key"
      regex: "INTERNAL_[A-Z0-9]{32}"
      severity: critical

Audit Log

Every security event is logged to ~/.rafter/audit.jsonl:

rafter agent audit                        # last 10 entries
rafter agent audit --last 20              # last 20
rafter agent audit --event secret_detected
rafter agent audit --since 2026-01-01

Event types: command_intercepted, secret_detected, content_sanitized, policy_override. scan_executed and config_changed are reserved for future use (defined in the type union but not yet emitted).

Skill Auditing

Audit third-party skills/extensions before installing them:

rafter agent audit-skill path/to/untrusted-skill.md

Detects embedded secrets, external URLs, high-risk commands (curl|sh, eval(), base64|sh), and obfuscated code.

Configuration

rafter agent config show                                      # view all
rafter agent config set agent.riskLevel aggressive            # set risk level
rafter agent config set agent.commandPolicy.mode deny-list    # set policy mode

Risk levels: minimal (guidance only), moderate (default), aggressive (approval for most ops).

CI/CD

rafter ci init                     # auto-detect CI platform
rafter ci init --platform github   # GitHub Actions

GitHub Action:

- uses: Raftersecurity/rafter-cli@v1
  with:
    scan-path: '.'
    args: '--quiet'

Quick Reference

rafter brief commands              # condensed CLI reference
rafter brief setup/claude-code     # platform-specific setup guide
rafter brief security              # local security toolkit overview
rafter brief all                   # everything