PACT — Protocol for Agent Constitutional Trust#

"Negotiate before you integrate."

Use this skill when two agents from different systems need to establish trust before transacting. PACT provides a five-chamber protocol that handles the full lifecycle from first contact to secure session.

Five Chambers#

typescript

import { pact } from '@godman-protocols/sdk';

// Chamber 1 — Public Entry Gate: rate limiting, DID resolution
// Chamber 2 — Identity Analysis: ERC-8004 verification, trust score → session ceiling
// Chamber 3 — Intent Analysis: 3-pass prompt injection scanner, coherence check
// Chamber 4 — Negotiation Room: capability declaration, payment terms, EIP-712 dual signature
// Chamber 5 — Secure Channel: capability-locked session token via HMAC(deal_hash + agent_did + expiry)

Trust Score → Session Ceiling#

Score RangeCeilingDurationPrice Multiplier85-100FULL24h1.0x70-84STANDARD4h1.2x50-69RESTRICTED1h1.5x30-49MINIMAL15m2.0x<30REJECTED——UnknownPROVISIONAL15m2.5x

When to Use#

• First contact between agents from different systems
• Establishing trust before any data exchange or payment
• Constitutional negotiation (what constraints each agent requires)
• Creating capability-locked session tokens with automatic expiry

Notes#

• SOUL constraints override PACT sessions — never use PACT to bypass safety rules
• Every PACT session produces an EAS attestation on Base (on-chain audit trail)
• Integrates with LAX for discovery and DRS for deal receipts