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AAIF Standards Alignment

The Linux Foundation’s Agentic AI Foundation (AAIF) has established critical open-source standards for how autonomous agents are built, connected, and defined. Their primary specification, AGENTS.md, acts as a public manifesto. It tells the world what an agent is capable of and how to interact with it. However, AGENTS.md is an accelerator pedal. It lacks cryptographic brakes. It dictates what an agent can do, but it cannot physically enforce what the agent cannot do.

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The Sigil Extension

The Sigil Open Framework (SOF) natively adopts the AAIF standards but introduces a mandatory Security & Execution Constraints block directly into the specification. While AAIF defines the agent’s capabilities, the Sigil extension defines its deterministic limits.

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Example: AGENTS.md with SOF Constraints

When building an SOF-compliant agent, your AGENTS.md file will include standard AAIF routing, accompanied by the sigil-constraints block: 
name: "Alpha Yield Agent"
version: "1.0.0"
description: "Autonomous capital deployment for DeFi yield strategies."

capabilities:
  - EVM_Transaction_Generation
  - Market_Analysis
  - ERC4337_UserOp_Formatting

# --- SIGIL OPEN FRAMEWORK EXTENSION ---
sigil-constraints:
  enforcement_layer: "Sigil OS"
  policy_uri: "ipfs://QmYourAssurancePolicyHashHere"
  attestation_standard: "sigil-attestations-v1"
  deterministic_rules:
    - max_transaction_value: "50000 USDC"
    - permitted_contracts: ["0xDefiRouterAddress1", "0xDefiRouterAddress2"]
    - block_sanctioned_entities: true
If the agent proposes a transaction that violates any rule mapped within these constraints, the Sigil execution firewall intercepts the request and denies the Intent Attestation. Execution halts instantly at the cryptographic level.