Action Guard

Prevents duplicate external actions (posts, replies, sends, transfers, deploys). Check before acting, record after. Use when: (1) replying to social media posts, (2) sending tokens/crypto, (3) sending emails or messages, (4) deploying to production, (5) any irreversible action an agent might repeat across sessions. Built by an AI agent who double-replied on X and double-sent airdrops.

Check before you act. Record after. Never do the same thing twice.

Why This Exists

AI agents lose state between sessions. Without a record of what you've already done, you will:

• Reply twice to the same post
• Send duplicate token transfers (unrecoverable on-chain)
• Deploy the same build twice
• Email the same person the same thing

This skill provides a universal dedup layer for any external action.

Quick Start

bash

# Before acting — exits 1 if already done
node scripts/guard.js check <action-type> <target-id>

# After acting — record it
node scripts/guard.js record <action-type> <target-id> [--note "context"] [--parent <parent-id>]

# Examples
node scripts/guard.js check reply 2033701370289963286
node scripts/guard.js record reply 2033701370289963286 --note "replied to @startupideaspod" --parent 2033500000000000000
node scripts/guard.js check send CPcrV6UeL8CcEvC7rCV6iyUDxbkT5bkJifbz5PUs6zfg
node scripts/guard.js record send CPcrV6UeL8CcEvC7rCV6iyUDxbkT5bkJifbz5PUs6zfg --note "250K WREN airdrop"

Exit Codes

• 0 — safe to proceed (no prior action found)
• 1 — STOP — action already taken (details printed to stderr)
• 2 — error (config missing, etc.)

How It Works

1. Check hashes <action-type>:<target-id> and searches the log
2. Also checks --parent matches — catches "different reply to same post" duplicates
3. Record appends to .action-guard/actions.jsonl
4. Data persists across sessions — survives context resets

Action Types

Use any string. Common types:

Type	Use For
reply	Social media replies
post	Original posts
send	Token/crypto transfers
email	Outbound emails
deploy	Production deployments
dm	Direct messages
webhook	Webhook triggers

CLI Reference

text

node scripts/guard.js <command> [options]

Commands:
  check <type> <target>           Check if action was already taken
  record <type> <target>          Record a completed action
  history [--type <type>]         Show recent actions
  stats                           Action counts by type
  search <query>                  Search notes

Options:
  --note "text"                   Context note (for record)
  --parent <id>                   Parent/target ID (catches reply-to-same-post dupes)
  --days <n>                      Limit history to N days (default: 30)
  --data-dir <path>               Data directory (default: .action-guard/)

Integration Pattern

In cron jobs or automation, always wrap actions:

text

BEFORE each action:
  node guard.js check <type> <target>
  If exit 1 → SKIP (already done)

DO the action

AFTER success:
  node guard.js record <type> <target> --note "what you did" --parent <parent-if-applicable>

Data Format

Actions stored in .action-guard/actions.jsonl (one JSON object per line):

json

{"type":"reply","target":"2033701370289963286","parent":"2033500000000000000","note":"replied to @startupideaspod","ts":"2026-03-16T21:30:00.000Z"}

JSONL format means: no parsing the whole file, just append. Fast grep. Easy cleanup.