0xcircuitbreaker/ddg-skills-starter
Five free guardrail skills for agents that touch money, audits, or outbound messaging: fleet audit starter, UNKNOWN-is-not-pass, agent price-parity check, cron outreach safety gate, and x402 facilitator health check.
Verify an agent-payable API charges what it advertises: fetch the 402 challenge, compare against the published OpenAPI/pricing page, and flag drift. Use when publishing per-call API prices, before repricing, or when a buyer disputes a charge. One check, five minutes, works on any x402-style API.
Pre-flight checklist before letting an automated agent send outbound email, post publicly, or run scheduled outreach crons. Use when enabling any cron that sends messages, restarting outreach automation, or handing an agent a sender identity - prevents the classic spam-trap, wrong-identity, and runaway-cron failures.
Start here for auditing agent fleets: understand the proof-vs-claims distinction, check whether your runs produce verifiable provenance, and pick the right DDG fleet-audit skill. Free companion to the paid suite; also documents the DDG x402 endpoints for tine verification at agents.daedalusdevelopmentgroup.com.
Guardrail: preflight ANY x402 facilitator before relying on it - supported schemes/networks, envelope contract, rate-limit shape, settle-gas health, and discovery-indexing behavior. Use when picking a facilitator, before pointing production traffic at one, or when settles start failing mysteriously.
Audit guardrail: treat missing evidence as a finding, never as a pass. Use when reviewing agent outputs, security scans, compliance checklists, or any report that claims something is "fine" - force the report to distinguish PASS from UNKNOWN before you act on it.