{
  "schema_version": "lvl-agent-train-v1",
  "updated_at": "2026-07-22T20:08:53.914Z",
  "integrity": {
    "knowledge": "free",
    "capability": "paid_x402_optional",
    "rule": "Every concept on a path is fully teachable without purchase. Skills are optional implementations, never required reading.",
    "display": "Learn free. Buy only if you want a ready-to-run sealed pack."
  },
  "description": "Query what to learn/acquire for a goal. Knowledge is free; skills are optional paid implementations.",
  "endpoints": {
    "paths": "https://lvlltd.com/learn/paths.json",
    "path": "https://lvlltd.com/learn/paths/{slug}.json",
    "lesson": "https://lvlltd.com/learn/lessons/{id}.json",
    "train_query": "https://lvlltd.com/api/train?goal={text}",
    "train_path": "https://lvlltd.com/api/train?path={slug}",
    "concept": "https://lvlltd.com/api/train?concept={concept}"
  },
  "goals_index": [
    {
      "path_id": "understand-agent-economy",
      "slug": "understand-agent-economy",
      "title": "Understand the agent economy",
      "outcomes": [
        "Explain x402 unlock vs subscription SaaS in plain language",
        "Distinguish free knowledge from paid sealed packs",
        "Read a proof ledger without inventing volume",
        "Find machine entry points agents actually use"
      ],
      "concepts": [
        "agent-commerce",
        "micropayments",
        "evaluation-before-pay",
        "integrity-split",
        "free-evaluation",
        "sealed-packs",
        "x402",
        "402-challenge",
        "base-usdc",
        "idempotent-redeem",
        "proof-ledger",
        "confirmed-volume",
        "vanity-metrics",
        "machine-discovery",
        "llms-txt",
        "mcp",
        "a2a",
        "catalog"
      ]
    },
    {
      "path_id": "build-first-x402-service",
      "slug": "build-first-x402-service",
      "title": "Build your first x402 service",
      "outcomes": [
        "Complete a $0.05 canary unlock mentally (and optionally for real)",
        "Design a 402 challenge with correct atomic USDC amount",
        "Avoid double-pay with idempotent redeem keys",
        "Verify sealed payload hashes after unlock"
      ],
      "concepts": [
        "canary-purchase",
        "base-usdc",
        "first-buy",
        "402-fields",
        "atomic-usdc",
        "skill-binding",
        "idempotency",
        "retry-policy",
        "double-pay",
        "erc-7857",
        "data-hash",
        "sealed-pack",
        "merchant-ops",
        "catalog-honesty",
        "cold-start"
      ]
    },
    {
      "path_id": "deploy-multi-agent-workflow",
      "slug": "deploy-multi-agent-workflow",
      "title": "Deploy a multi-agent workflow",
      "outcomes": [
        "Map a multi-step workflow into ordered skills",
        "Place health, throttle, and HITL gates before production",
        "Choose a bundle vs buying singles with eyes open",
        "Describe a networking agent loop end-to-end"
      ],
      "concepts": [
        "multi-agent",
        "workflow",
        "handoff",
        "agent-health",
        "heartbeat",
        "progress",
        "rate-limit",
        "cost-class",
        "circuit-breaker",
        "hitl",
        "approval-gate",
        "least-agency",
        "networking-loop",
        "intro-quality",
        "follow-up",
        "skill-bundles",
        "compatibility",
        "execution-order"
      ]
    }
  ],
  "paths": [
    {
      "id": "understand-agent-economy",
      "slug": "understand-agent-economy",
      "title": "Understand the agent economy",
      "audience": [
        "human",
        "agent"
      ],
      "level": "beginner",
      "estimated_minutes": 45,
      "summary": "What agent commerce is, why micropayments matter, how free evaluation differs from sealed capability, and how honest markets prove sales.",
      "outcomes": [
        "Explain x402 unlock vs subscription SaaS in plain language",
        "Distinguish free knowledge from paid sealed packs",
        "Read a proof ledger without inventing volume",
        "Find machine entry points agents actually use"
      ],
      "lesson_ids": [
        "path-ae-01-what-is-agent-commerce",
        "path-ae-02-free-knowledge-vs-paid-capability",
        "path-ae-03-x402-in-five-steps",
        "path-ae-04-proof-and-honest-metrics",
        "path-ae-05-machine-entry-points"
      ],
      "related_skills_optional": [
        {
          "skill_id": "agent-x402-first-buy",
          "name": "Agent x402 First Buy",
          "price_usd": 0.05,
          "price_label": "$0.05 / unlock",
          "summary": "$0.05 start-here: prove your agent can complete HTTP 402 → Base USDC → sealed pack unlock on lvlltd.com.",
          "outline": "https://lvlltd.com/skills/agent-x402-first-buy/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
          "listing": "https://lvlltd.com/listings/agent-x402-first-buy/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "agent-readable-seo-kit",
          "name": "Agent-Readable SEO Kit",
          "price_usd": 4.99,
          "price_label": "$4.99 / unlock",
          "summary": "Structure catalog.json and agent.json so shopping agents can rank listings.",
          "outline": "https://lvlltd.com/skills/agent-readable-seo-kit/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=agent-readable-seo-kit",
          "listing": "https://lvlltd.com/listings/agent-readable-seo-kit/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "revenue-truth-ledger",
          "name": "Revenue Truth Ledger",
          "price_usd": 8.99,
          "price_label": "$8.99 / pack",
          "summary": "Evidence-backed revenue ledger across DOGE, x402, card, and manual paid events.",
          "outline": "https://lvlltd.com/skills/revenue-truth-ledger/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=revenue-truth-ledger",
          "listing": "https://lvlltd.com/listings/revenue-truth-ledger/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        }
      ],
      "related_bundles_optional": [
        {
          "bundle_id": "bundle-x402-buyer-ops",
          "name": "x402 Buyer Ops Stack",
          "price_usd": 4.49,
          "savings_usd": 1.03,
          "execution_order": [
            "agent-x402-first-buy",
            "gas-fee-forecaster-base",
            "x402-retry-idempotency-kit",
            "sealed-payload-integrity-checker"
          ],
          "challenge": "https://lvlltd.com/api/pay?skill=bundle-x402-buyer-ops",
          "optional": true,
          "label": "optional_stack"
        }
      ],
      "featured": true,
      "sort_order": 10,
      "schema_version": "lvl-knowledge-path-v1",
      "lessons": [
        {
          "id": "path-ae-01-what-is-agent-commerce",
          "order": 1,
          "title": "What is agent commerce?",
          "summary": "Agents buying capability the way humans buy apps — but with machine-readable prices, free evaluation, and on-chain micropayments.",
          "estimated_minutes": 8,
          "concepts": [
            "agent-commerce",
            "micropayments",
            "evaluation-before-pay"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ae-01-what-is-agent-commerce/",
          "related_skills_optional": [
            {
              "skill_id": "agent-x402-first-buy",
              "name": "Agent x402 First Buy",
              "price_usd": 0.05,
              "price_label": "$0.05 / unlock",
              "summary": "$0.05 start-here: prove your agent can complete HTTP 402 → Base USDC → sealed pack unlock on lvlltd.com.",
              "outline": "https://lvlltd.com/skills/agent-x402-first-buy/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
              "listing": "https://lvlltd.com/listings/agent-x402-first-buy/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ae-02-free-knowledge-vs-paid-capability",
          "order": 2,
          "title": "Free knowledge vs paid capability",
          "summary": "The integrity line that makes a marketplace trustworthy: concepts stay open; ready-to-run sealed implementations can be paid.",
          "estimated_minutes": 7,
          "concepts": [
            "integrity-split",
            "free-evaluation",
            "sealed-packs"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ae-02-free-knowledge-vs-paid-capability/",
          "related_skills_optional": [],
          "related_bundles_optional": []
        },
        {
          "id": "path-ae-03-x402-in-five-steps",
          "order": 3,
          "title": "x402 in five steps (conceptually)",
          "summary": "HTTP 402 Payment Required as a commercial protocol: challenge, settle, unlock — without monthly seats.",
          "estimated_minutes": 10,
          "concepts": [
            "x402",
            "402-challenge",
            "base-usdc",
            "idempotent-redeem"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ae-03-x402-in-five-steps/",
          "related_skills_optional": [
            {
              "skill_id": "agent-x402-first-buy",
              "name": "Agent x402 First Buy",
              "price_usd": 0.05,
              "price_label": "$0.05 / unlock",
              "summary": "$0.05 start-here: prove your agent can complete HTTP 402 → Base USDC → sealed pack unlock on lvlltd.com.",
              "outline": "https://lvlltd.com/skills/agent-x402-first-buy/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
              "listing": "https://lvlltd.com/listings/agent-x402-first-buy/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ae-04-proof-and-honest-metrics",
          "order": 4,
          "title": "Proof ledgers and honest metrics",
          "summary": "How markets prove real unlocks — and why inventing volume destroys trust faster than empty shelves.",
          "estimated_minutes": 8,
          "concepts": [
            "proof-ledger",
            "confirmed-volume",
            "vanity-metrics"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ae-04-proof-and-honest-metrics/",
          "related_skills_optional": [
            {
              "skill_id": "revenue-truth-ledger",
              "name": "Revenue Truth Ledger",
              "price_usd": 8.99,
              "price_label": "$8.99 / pack",
              "summary": "Evidence-backed revenue ledger across DOGE, x402, card, and manual paid events.",
              "outline": "https://lvlltd.com/skills/revenue-truth-ledger/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=revenue-truth-ledger",
              "listing": "https://lvlltd.com/listings/revenue-truth-ledger/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "fake-review-demand-detector",
              "name": "Fake Review / Fake Demand Detector",
              "price_usd": 6.99,
              "price_label": "$6.99 / unlock",
              "summary": "Spot inflated engagement and wash-style demand on marketplace listings.",
              "outline": "https://lvlltd.com/skills/fake-review-demand-detector/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=fake-review-demand-detector",
              "listing": "https://lvlltd.com/listings/fake-review-demand-detector/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ae-05-machine-entry-points",
          "order": 5,
          "title": "Machine entry points agents actually use",
          "summary": "catalog.json, llms.txt, MCP, A2A agent cards, and shop — how agents discover a market without scraping SPAs.",
          "estimated_minutes": 9,
          "concepts": [
            "machine-discovery",
            "llms-txt",
            "mcp",
            "a2a",
            "catalog"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ae-05-machine-entry-points/",
          "related_skills_optional": [
            {
              "skill_id": "agent-readable-seo-kit",
              "name": "Agent-Readable SEO Kit",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "Structure catalog.json and agent.json so shopping agents can rank listings.",
              "outline": "https://lvlltd.com/skills/agent-readable-seo-kit/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-readable-seo-kit",
              "listing": "https://lvlltd.com/listings/agent-readable-seo-kit/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        }
      ],
      "lesson_count": 5,
      "last_updated": "2026-07-22T12:00:00.000Z",
      "freshness": {
        "last_updated_at": "2026-07-22T12:00:00.000Z",
        "days_since_update": 0,
        "band": "fresh",
        "score_0_100": 95,
        "label": "Fresh",
        "display": "Fresh · updated 2026-07-22 (0d ago)"
      },
      "urls": {
        "human": "https://lvlltd.com/learn/paths/understand-agent-economy/",
        "machine": "https://lvlltd.com/learn/paths/understand-agent-economy.json"
      },
      "integrity": {
        "knowledge": "free",
        "capability": "paid_x402_optional",
        "rule": "Every concept on a path is fully teachable without purchase. Skills are optional implementations, never required reading.",
        "display": "Learn free. Buy only if you want a ready-to-run sealed pack."
      },
      "updated_at": "2026-07-22T20:08:53.914Z"
    },
    {
      "id": "build-first-x402-service",
      "slug": "build-first-x402-service",
      "title": "Build your first x402 service",
      "audience": [
        "human",
        "agent"
      ],
      "level": "intermediate",
      "estimated_minutes": 60,
      "summary": "From first successful micropay loop to designing a merchant-safe paywall: challenges, exact amounts, re-redeem, and integrity checks.",
      "outcomes": [
        "Complete a $0.05 canary unlock mentally (and optionally for real)",
        "Design a 402 challenge with correct atomic USDC amount",
        "Avoid double-pay with idempotent redeem keys",
        "Verify sealed payload hashes after unlock"
      ],
      "lesson_ids": [
        "path-x402-01-canary-purchase-walkthrough",
        "path-x402-02-challenge-anatomy",
        "path-x402-03-idempotency-and-retries",
        "path-x402-04-sealed-pack-integrity",
        "path-x402-05-merchant-checklist"
      ],
      "related_skills_optional": [
        {
          "skill_id": "agent-x402-first-buy",
          "name": "Agent x402 First Buy",
          "price_usd": 0.05,
          "price_label": "$0.05 / unlock",
          "summary": "$0.05 start-here: prove your agent can complete HTTP 402 → Base USDC → sealed pack unlock on lvlltd.com.",
          "outline": "https://lvlltd.com/skills/agent-x402-first-buy/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
          "listing": "https://lvlltd.com/listings/agent-x402-first-buy/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "x402-retry-idempotency-kit",
          "name": "x402 Retry Idempotency Kit",
          "price_usd": 0.99,
          "price_label": "$0.99 / unlock",
          "summary": "Safe retries after flaky 402 unlocks without double-spend logic errors.",
          "outline": "https://lvlltd.com/skills/x402-retry-idempotency-kit/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=x402-retry-idempotency-kit",
          "listing": "https://lvlltd.com/listings/x402-retry-idempotency-kit/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "sealed-payload-integrity-checker",
          "name": "Sealed Payload Integrity Checker",
          "price_usd": 3.99,
          "price_label": "$3.99 / unlock",
          "summary": "Verify data_hash matches delivered sealed content before trusting an unlock.",
          "outline": "https://lvlltd.com/skills/sealed-payload-integrity-checker/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=sealed-payload-integrity-checker",
          "listing": "https://lvlltd.com/listings/sealed-payload-integrity-checker/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "gas-fee-forecaster-base",
          "name": "Gas Fee Forecaster (Base)",
          "price_usd": 0.49,
          "price_label": "$0.49 / unlock",
          "summary": "Estimate Base gas spend for a month of unlocks and agent txs.",
          "outline": "https://lvlltd.com/skills/gas-fee-forecaster-base/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=gas-fee-forecaster-base",
          "listing": "https://lvlltd.com/listings/gas-fee-forecaster-base/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "x402-merchant-operating-system",
          "name": "x402 Merchant Operating System",
          "price_usd": 39,
          "price_label": "$39.00 / unlock",
          "summary": "End-to-end OS for running an x402 skill market: catalog, proof, disputes, and growth.",
          "outline": "https://lvlltd.com/skills/x402-merchant-operating-system/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=x402-merchant-operating-system",
          "listing": "https://lvlltd.com/listings/x402-merchant-operating-system/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        }
      ],
      "related_bundles_optional": [
        {
          "bundle_id": "bundle-x402-buyer-ops",
          "name": "x402 Buyer Ops Stack",
          "price_usd": 4.49,
          "savings_usd": 1.03,
          "execution_order": [
            "agent-x402-first-buy",
            "gas-fee-forecaster-base",
            "x402-retry-idempotency-kit",
            "sealed-payload-integrity-checker"
          ],
          "challenge": "https://lvlltd.com/api/pay?skill=bundle-x402-buyer-ops",
          "optional": true,
          "label": "optional_stack"
        }
      ],
      "featured": true,
      "sort_order": 20,
      "schema_version": "lvl-knowledge-path-v1",
      "lessons": [
        {
          "id": "path-x402-01-canary-purchase-walkthrough",
          "order": 1,
          "title": "Canary purchase walkthrough (concept + optional live)",
          "summary": "Use a $0.05 skill as a practice loop so the first real failure is cheap.",
          "estimated_minutes": 10,
          "concepts": [
            "canary-purchase",
            "base-usdc",
            "first-buy"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-x402-01-canary-purchase-walkthrough/",
          "related_skills_optional": [
            {
              "skill_id": "agent-x402-first-buy",
              "name": "Agent x402 First Buy",
              "price_usd": 0.05,
              "price_label": "$0.05 / unlock",
              "summary": "$0.05 start-here: prove your agent can complete HTTP 402 → Base USDC → sealed pack unlock on lvlltd.com.",
              "outline": "https://lvlltd.com/skills/agent-x402-first-buy/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
              "listing": "https://lvlltd.com/listings/agent-x402-first-buy/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-x402-02-challenge-anatomy",
          "order": 2,
          "title": "Anatomy of a 402 challenge",
          "summary": "Which fields a client must read: amount, payTo, network, asset contract, skill binding.",
          "estimated_minutes": 9,
          "concepts": [
            "402-fields",
            "atomic-usdc",
            "skill-binding"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-x402-02-challenge-anatomy/",
          "related_skills_optional": [
            {
              "skill_id": "x402-receipt-normalizer",
              "name": "x402 Receipt Normalizer",
              "price_usd": 11.99,
              "price_label": "$11.99 / pack",
              "summary": "Normalize crypto/x402 receipts into ledger-ready payment events.",
              "outline": "https://lvlltd.com/skills/x402-receipt-normalizer/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=x402-receipt-normalizer",
              "listing": "https://lvlltd.com/listings/x402-receipt-normalizer/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-x402-03-idempotency-and-retries",
          "order": 3,
          "title": "Idempotency: never pay twice for one unlock",
          "summary": "Slow unlocks are not unpaid unlocks. Design attempt ledgers so agents do not double-transfer.",
          "estimated_minutes": 8,
          "concepts": [
            "idempotency",
            "retry-policy",
            "double-pay"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-x402-03-idempotency-and-retries/",
          "related_skills_optional": [
            {
              "skill_id": "x402-retry-idempotency-kit",
              "name": "x402 Retry Idempotency Kit",
              "price_usd": 0.99,
              "price_label": "$0.99 / unlock",
              "summary": "Safe retries after flaky 402 unlocks without double-spend logic errors.",
              "outline": "https://lvlltd.com/skills/x402-retry-idempotency-kit/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=x402-retry-idempotency-kit",
              "listing": "https://lvlltd.com/listings/x402-retry-idempotency-kit/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-x402-04-sealed-pack-integrity",
          "order": 4,
          "title": "Sealed packs and integrity checks",
          "summary": "Payment proves you paid. Hash checks prove the files match the listing claim.",
          "estimated_minutes": 8,
          "concepts": [
            "erc-7857",
            "data-hash",
            "sealed-pack"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-x402-04-sealed-pack-integrity/",
          "related_skills_optional": [
            {
              "skill_id": "sealed-payload-integrity-checker",
              "name": "Sealed Payload Integrity Checker",
              "price_usd": 3.99,
              "price_label": "$3.99 / unlock",
              "summary": "Verify data_hash matches delivered sealed content before trusting an unlock.",
              "outline": "https://lvlltd.com/skills/sealed-payload-integrity-checker/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=sealed-payload-integrity-checker",
              "listing": "https://lvlltd.com/listings/sealed-payload-integrity-checker/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-x402-05-merchant-checklist",
          "order": 5,
          "title": "Merchant checklist for an x402 skill market",
          "summary": "What operators must keep consistent: catalog, challenge, unlock, proof, and support truth.",
          "estimated_minutes": 10,
          "concepts": [
            "merchant-ops",
            "catalog-honesty",
            "cold-start"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-x402-05-merchant-checklist/",
          "related_skills_optional": [
            {
              "skill_id": "x402-merchant-operating-system",
              "name": "x402 Merchant Operating System",
              "price_usd": 39,
              "price_label": "$39.00 / unlock",
              "summary": "End-to-end OS for running an x402 skill market: catalog, proof, disputes, and growth.",
              "outline": "https://lvlltd.com/skills/x402-merchant-operating-system/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=x402-merchant-operating-system",
              "listing": "https://lvlltd.com/listings/x402-merchant-operating-system/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "cold-start-catalog-bootstrapper",
              "name": "Cold-Start Catalog Bootstrapper",
              "price_usd": 7.99,
              "price_label": "$7.99 / unlock",
              "summary": "Launch play for a marketplace with zero sales history and empty social proof.",
              "outline": "https://lvlltd.com/skills/cold-start-catalog-bootstrapper/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=cold-start-catalog-bootstrapper",
              "listing": "https://lvlltd.com/listings/cold-start-catalog-bootstrapper/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        }
      ],
      "lesson_count": 5,
      "last_updated": "2026-07-22T12:00:00.000Z",
      "freshness": {
        "last_updated_at": "2026-07-22T12:00:00.000Z",
        "days_since_update": 0,
        "band": "fresh",
        "score_0_100": 95,
        "label": "Fresh",
        "display": "Fresh · updated 2026-07-22 (0d ago)"
      },
      "urls": {
        "human": "https://lvlltd.com/learn/paths/build-first-x402-service/",
        "machine": "https://lvlltd.com/learn/paths/build-first-x402-service.json"
      },
      "integrity": {
        "knowledge": "free",
        "capability": "paid_x402_optional",
        "rule": "Every concept on a path is fully teachable without purchase. Skills are optional implementations, never required reading.",
        "display": "Learn free. Buy only if you want a ready-to-run sealed pack."
      },
      "updated_at": "2026-07-22T20:08:53.914Z"
    },
    {
      "id": "deploy-multi-agent-workflow",
      "slug": "deploy-multi-agent-workflow",
      "title": "Deploy a multi-agent workflow",
      "audience": [
        "human",
        "agent"
      ],
      "level": "intermediate",
      "estimated_minutes": 70,
      "summary": "Compose agents safely: health signals, tool rate limits, human approval gates, and ordered skill stacks (networking loop as the worked example).",
      "outcomes": [
        "Map a multi-step workflow into ordered skills",
        "Place health, throttle, and HITL gates before production",
        "Choose a bundle vs buying singles with eyes open",
        "Describe a networking agent loop end-to-end"
      ],
      "lesson_ids": [
        "path-ma-01-why-workflows-not-one-prompts",
        "path-ma-02-health-and-stuck-agents",
        "path-ma-03-rate-limits-and-cost",
        "path-ma-04-human-in-the-loop",
        "path-ma-05-networking-loop-assembly",
        "path-ma-06-bundles-and-compatibility"
      ],
      "related_skills_optional": [
        {
          "skill_id": "agent-health-check-protocol",
          "name": "Agent Health Check Protocol",
          "price_usd": 2.99,
          "price_label": "$2.99 / unlock",
          "summary": "Heartbeat and liveness checks so orchestrators detect silent sub-agent death.",
          "outline": "https://lvlltd.com/skills/agent-health-check-protocol/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=agent-health-check-protocol",
          "listing": "https://lvlltd.com/listings/agent-health-check-protocol/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "tool-call-rate-limiter",
          "name": "Tool-Call Rate Limiter",
          "price_usd": 3.99,
          "price_label": "$3.99 / unlock",
          "summary": "Per-tool throttles and backoff so agents stop hammering paid APIs.",
          "outline": "https://lvlltd.com/skills/tool-call-rate-limiter/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=tool-call-rate-limiter",
          "listing": "https://lvlltd.com/listings/tool-call-rate-limiter/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "human-in-loop-approval-gate",
          "name": "Human-in-the-Loop Approval Gate",
          "price_usd": 5.99,
          "price_label": "$5.99 / unlock",
          "summary": "Block irreversible agent actions until a human signs a structured approve payload.",
          "outline": "https://lvlltd.com/skills/human-in-loop-approval-gate/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=human-in-loop-approval-gate",
          "listing": "https://lvlltd.com/listings/human-in-loop-approval-gate/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "intro-quality-scorer",
          "name": "Intro Quality Scorer",
          "price_usd": 4.99,
          "price_label": "$4.99 / unlock",
          "summary": "Score potential warm intros on relevance, timing, mutual value, and close probability for Boardy-style agents.",
          "outline": "https://lvlltd.com/skills/intro-quality-scorer/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=intro-quality-scorer",
          "listing": "https://lvlltd.com/listings/intro-quality-scorer/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "warm-intro-message-generator",
          "name": "Warm Intro Message Generator",
          "price_usd": 3.99,
          "price_label": "$3.99 / unlock",
          "summary": "Personalized double-opt-in warm intro messages and follow-ups — non-cringe, mutual-value first.",
          "outline": "https://lvlltd.com/skills/warm-intro-message-generator/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=warm-intro-message-generator",
          "listing": "https://lvlltd.com/listings/warm-intro-message-generator/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "meeting-prep-brief-agent",
          "name": "Meeting Prep Brief Agent",
          "price_usd": 4.99,
          "price_label": "$4.99 / unlock",
          "summary": "One-pager meeting brief: counterparty snapshot, talking points, landmines, success criteria.",
          "outline": "https://lvlltd.com/skills/meeting-prep-brief-agent/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=meeting-prep-brief-agent",
          "listing": "https://lvlltd.com/listings/meeting-prep-brief-agent/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        },
        {
          "skill_id": "deal-followup-sequencer",
          "name": "Deal Follow-up Sequencer",
          "price_usd": 4.99,
          "price_label": "$4.99 / unlock",
          "summary": "Post-intro and post-meeting follow-up sequences with timing, copy, and stop rules until next action.",
          "outline": "https://lvlltd.com/skills/deal-followup-sequencer/outline.json",
          "challenge": "https://lvlltd.com/api/pay?skill=deal-followup-sequencer",
          "listing": "https://lvlltd.com/listings/deal-followup-sequencer/",
          "available": true,
          "optional": true,
          "label": "optional_implementation"
        }
      ],
      "related_bundles_optional": [
        {
          "bundle_id": "bundle-agent-production-gates",
          "name": "Agent Production Gates",
          "price_usd": 10.99,
          "savings_usd": 1.98,
          "execution_order": [
            "agent-health-check-protocol",
            "tool-call-rate-limiter",
            "human-in-loop-approval-gate"
          ],
          "challenge": "https://lvlltd.com/api/pay?skill=bundle-agent-production-gates",
          "optional": true,
          "label": "optional_stack"
        },
        {
          "bundle_id": "bundle-networking-agent-full-loop",
          "name": "Networking Agent Full Loop",
          "price_usd": 14.99,
          "savings_usd": 3.97,
          "execution_order": [
            "intro-quality-scorer",
            "warm-intro-message-generator",
            "meeting-prep-brief-agent",
            "deal-followup-sequencer"
          ],
          "challenge": "https://lvlltd.com/api/pay?skill=bundle-networking-agent-full-loop",
          "optional": true,
          "label": "optional_stack"
        }
      ],
      "featured": true,
      "sort_order": 30,
      "schema_version": "lvl-knowledge-path-v1",
      "lessons": [
        {
          "id": "path-ma-01-why-workflows-not-one-prompts",
          "order": 1,
          "title": "Workflows beat one giant prompt",
          "summary": "Multi-step agent systems need ordered stages, handoffs, and failure isolation — not a single mega-prompt.",
          "estimated_minutes": 7,
          "concepts": [
            "multi-agent",
            "workflow",
            "handoff"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ma-01-why-workflows-not-one-prompts/",
          "related_skills_optional": [],
          "related_bundles_optional": []
        },
        {
          "id": "path-ma-02-health-and-stuck-agents",
          "order": 2,
          "title": "Health signals: alive vs making progress",
          "summary": "Heartbeat is not progress. Detect stuck agents before budgets burn.",
          "estimated_minutes": 8,
          "concepts": [
            "agent-health",
            "heartbeat",
            "progress"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ma-02-health-and-stuck-agents/",
          "related_skills_optional": [
            {
              "skill_id": "agent-health-check-protocol",
              "name": "Agent Health Check Protocol",
              "price_usd": 2.99,
              "price_label": "$2.99 / unlock",
              "summary": "Heartbeat and liveness checks so orchestrators detect silent sub-agent death.",
              "outline": "https://lvlltd.com/skills/agent-health-check-protocol/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-health-check-protocol",
              "listing": "https://lvlltd.com/listings/agent-health-check-protocol/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ma-03-rate-limits-and-cost",
          "order": 3,
          "title": "Rate limits and cost classes",
          "summary": "Aggressive retries turn one flaky tool into a bill. Class tools by cost and cap them.",
          "estimated_minutes": 8,
          "concepts": [
            "rate-limit",
            "cost-class",
            "circuit-breaker"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ma-03-rate-limits-and-cost/",
          "related_skills_optional": [
            {
              "skill_id": "tool-call-rate-limiter",
              "name": "Tool-Call Rate Limiter",
              "price_usd": 3.99,
              "price_label": "$3.99 / unlock",
              "summary": "Per-tool throttles and backoff so agents stop hammering paid APIs.",
              "outline": "https://lvlltd.com/skills/tool-call-rate-limiter/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=tool-call-rate-limiter",
              "listing": "https://lvlltd.com/listings/tool-call-rate-limiter/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "agent-budget-governor",
              "name": "Agent Budget Governor",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "Hard spend caps and per-run budgets for agent tool use — stop rules before runaway cost.",
              "outline": "https://lvlltd.com/skills/agent-budget-governor/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=agent-budget-governor",
              "listing": "https://lvlltd.com/listings/agent-budget-governor/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ma-04-human-in-the-loop",
          "order": 4,
          "title": "Human-in-the-loop before irreversible actions",
          "summary": "Spend, outbound messages, and deploys need structured approval — not vibes.",
          "estimated_minutes": 8,
          "concepts": [
            "hitl",
            "approval-gate",
            "least-agency"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ma-04-human-in-the-loop/",
          "related_skills_optional": [
            {
              "skill_id": "human-in-loop-approval-gate",
              "name": "Human-in-the-Loop Approval Gate",
              "price_usd": 5.99,
              "price_label": "$5.99 / unlock",
              "summary": "Block irreversible agent actions until a human signs a structured approve payload.",
              "outline": "https://lvlltd.com/skills/human-in-loop-approval-gate/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=human-in-loop-approval-gate",
              "listing": "https://lvlltd.com/listings/human-in-loop-approval-gate/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": []
        },
        {
          "id": "path-ma-05-networking-loop-assembly",
          "order": 5,
          "title": "Worked example: networking agent loop",
          "summary": "Score intros → draft messages → prep meetings → follow up — as an ordered capability stack.",
          "estimated_minutes": 12,
          "concepts": [
            "networking-loop",
            "intro-quality",
            "follow-up"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
          "url": "https://lvlltd.com/learn/lessons/path-ma-05-networking-loop-assembly/",
          "related_skills_optional": [
            {
              "skill_id": "intro-quality-scorer",
              "name": "Intro Quality Scorer",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "Score potential warm intros on relevance, timing, mutual value, and close probability for Boardy-style agents.",
              "outline": "https://lvlltd.com/skills/intro-quality-scorer/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=intro-quality-scorer",
              "listing": "https://lvlltd.com/listings/intro-quality-scorer/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "warm-intro-message-generator",
              "name": "Warm Intro Message Generator",
              "price_usd": 3.99,
              "price_label": "$3.99 / unlock",
              "summary": "Personalized double-opt-in warm intro messages and follow-ups — non-cringe, mutual-value first.",
              "outline": "https://lvlltd.com/skills/warm-intro-message-generator/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=warm-intro-message-generator",
              "listing": "https://lvlltd.com/listings/warm-intro-message-generator/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "meeting-prep-brief-agent",
              "name": "Meeting Prep Brief Agent",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "One-pager meeting brief: counterparty snapshot, talking points, landmines, success criteria.",
              "outline": "https://lvlltd.com/skills/meeting-prep-brief-agent/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=meeting-prep-brief-agent",
              "listing": "https://lvlltd.com/listings/meeting-prep-brief-agent/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            },
            {
              "skill_id": "deal-followup-sequencer",
              "name": "Deal Follow-up Sequencer",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "Post-intro and post-meeting follow-up sequences with timing, copy, and stop rules until next action.",
              "outline": "https://lvlltd.com/skills/deal-followup-sequencer/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=deal-followup-sequencer",
              "listing": "https://lvlltd.com/listings/deal-followup-sequencer/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": [
            {
              "bundle_id": "bundle-networking-agent-full-loop",
              "name": "Networking Agent Full Loop",
              "price_usd": 14.99,
              "savings_usd": 3.97,
              "execution_order": [
                "intro-quality-scorer",
                "warm-intro-message-generator",
                "meeting-prep-brief-agent",
                "deal-followup-sequencer"
              ],
              "challenge": "https://lvlltd.com/api/pay?skill=bundle-networking-agent-full-loop",
              "optional": true,
              "label": "optional_stack"
            }
          ]
        },
        {
          "id": "path-ma-06-bundles-and-compatibility",
          "order": 6,
          "title": "Bundles and compatibility (assembling stacks)",
          "summary": "When to buy a composable stack, how execution order works, and how co-purchase signals stay honest.",
          "estimated_minutes": 10,
          "concepts": [
            "skill-bundles",
            "compatibility",
            "execution-order"
          ],
          "last_updated": "2026-07-22T12:00:00.000Z",
          "freshness": {
            "last_updated_at": "2026-07-22T12:00:00.000Z",
            "days_since_update": 0,
            "band": "fresh",
            "score_0_100": 95,
            "label": "Fresh",
            "display": "Fresh · updated 2026-07-22 (0d ago)"
          },
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            {
              "skill_id": "multi-skill-bundle-pricer",
              "name": "Multi-Skill Bundle Pricer",
              "price_usd": 4.99,
              "price_label": "$4.99 / unlock",
              "summary": "Price skill bundles without cannibalizing single-skill sales.",
              "outline": "https://lvlltd.com/skills/multi-skill-bundle-pricer/outline.json",
              "challenge": "https://lvlltd.com/api/pay?skill=multi-skill-bundle-pricer",
              "listing": "https://lvlltd.com/listings/multi-skill-bundle-pricer/",
              "available": true,
              "optional": true,
              "label": "optional_implementation"
            }
          ],
          "related_bundles_optional": [
            {
              "bundle_id": "bundle-networking-agent-full-loop",
              "name": "Networking Agent Full Loop",
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              "savings_usd": 3.97,
              "execution_order": [
                "intro-quality-scorer",
                "warm-intro-message-generator",
                "meeting-prep-brief-agent",
                "deal-followup-sequencer"
              ],
              "challenge": "https://lvlltd.com/api/pay?skill=bundle-networking-agent-full-loop",
              "optional": true,
              "label": "optional_stack"
            },
            {
              "bundle_id": "bundle-agent-production-gates",
              "name": "Agent Production Gates",
              "price_usd": 10.99,
              "savings_usd": 1.98,
              "execution_order": [
                "agent-health-check-protocol",
                "tool-call-rate-limiter",
                "human-in-loop-approval-gate"
              ],
              "challenge": "https://lvlltd.com/api/pay?skill=bundle-agent-production-gates",
              "optional": true,
              "label": "optional_stack"
            },
            {
              "bundle_id": "bundle-x402-buyer-ops",
              "name": "x402 Buyer Ops Stack",
              "price_usd": 4.49,
              "savings_usd": 1.03,
              "execution_order": [
                "agent-x402-first-buy",
                "gas-fee-forecaster-base",
                "x402-retry-idempotency-kit",
                "sealed-payload-integrity-checker"
              ],
              "challenge": "https://lvlltd.com/api/pay?skill=bundle-x402-buyer-ops",
              "optional": true,
              "label": "optional_stack"
            }
          ]
        }
      ],
      "lesson_count": 6,
      "last_updated": "2026-07-22T12:00:00.000Z",
      "freshness": {
        "last_updated_at": "2026-07-22T12:00:00.000Z",
        "days_since_update": 0,
        "band": "fresh",
        "score_0_100": 95,
        "label": "Fresh",
        "display": "Fresh · updated 2026-07-22 (0d ago)"
      },
      "urls": {
        "human": "https://lvlltd.com/learn/paths/deploy-multi-agent-workflow/",
        "machine": "https://lvlltd.com/learn/paths/deploy-multi-agent-workflow.json"
      },
      "integrity": {
        "knowledge": "free",
        "capability": "paid_x402_optional",
        "rule": "Every concept on a path is fully teachable without purchase. Skills are optional implementations, never required reading.",
        "display": "Learn free. Buy only if you want a ready-to-run sealed pack."
      },
      "updated_at": "2026-07-22T20:08:53.914Z"
    }
  ]
}