{
  "endpointType": "search-index",
  "schemaVersion": 1,
  "searchMode": "static-client-side",
  "queryParamSupport": false,
  "note": "This static endpoint returns a searchable corpus. Fetch /api/search.json and filter results client-side using title, description, tags, and keywords.",
  "fieldDefinitions": {
    "kind": "Content type: article, guide, comparison, or hub.",
    "machineUrl": "Token-efficient plain text mirror for agent retrieval.",
    "date": "Original publication date when present.",
    "updatedDate": "Most recent editorial update date when present.",
    "freshnessDate": "Best date for freshness ranking: updatedDate when present, otherwise original publication date.",
    "audience": "Primary builder audiences this content serves.",
    "builderStage": "Where this content fits in a builder workflow: explore, learn, architect, select-tools, evaluate, compare, or understand-landscape.",
    "stackLayers": "Open source AI stack layers discussed by the content.",
    "useCases": "Task-oriented retrieval intents supported by the content.",
    "opennessSignals": "Signals derived from content metadata and Markdown body text for whether the content is open-source-first, open-weight-aware, includes open-adjacent tools, or compares closed-source systems.",
    "intentKeywords": "Flattened routing terms derived from audience, builder stage, stack layers, use cases, and openness signals.",
    "related": "Deterministic related-content edges based on topic hub membership. Use these to move from a page to its hub or sibling content without re-searching the corpus.",
    "exampleQueries": "Natural-language query patterns that should route to a manifest entry point.",
    "nextActions": "Suggested retrieval or reasoning steps after selecting a manifest entry point."
  },
  "retrievalProtocol": [
    "For one known page, fetch the matching machineUrl or /agent/{collection}/{id}.txt mirror first.",
    "For task-oriented discovery, use /agent-manifest.json entryPoints; exampleQueries help route natural-language questions and nextActions describe what to fetch or verify next.",
    "For filtering, use /api/search.json fields: kind, tags, audience, builderStage, stackLayers, useCases, opennessSignals, freshnessDate, and keywords.",
    "For local graph traversal, follow related edges in /api/content-index.json or /api/search.json.",
    "For complete corpus synchronization, use /api/content-index.json.",
    "For human rendering, use canonical HTML URLs."
  ],
  "editorialUseGuidance": {
    "posture": "Open-source-first, builder-oriented analysis. Open-adjacent and closed-source tools may appear when they are important comparison points or ecosystem dependencies.",
    "freshness": "Use freshnessDate for ranking and updatedDate when present. Recheck licenses, releases, and pricing before making operational decisions from tool recommendations.",
    "citation": "When citing letsopen.ai, prefer canonical HTML URLs for human readers and machineUrl text mirrors for retrieval context.",
    "uncertainty": "Treat recommendations as editorial judgments, not exhaustive benchmarks or legal advice."
  },
  "count": 17,
  "results": [
    {
      "kind": "article",
      "id": "openclaw-what-it-is-and-why-it-matters",
      "title": "OpenClaw: what it is and why it matters",
      "description": "An AI-native personal operations platform that orchestrates agents for your digital life. Here's what OpenClaw does and why it's worth paying attention to.",
      "tags": [
        "openclaw",
        "agents",
        "personal AI"
      ],
      "url": "https://letsopen.ai/articles/openclaw-what-it-is-and-why-it-matters",
      "machineUrl": "https://letsopen.ai/agent/articles/openclaw-what-it-is-and-why-it-matters.txt",
      "date": "2026-03-09T00:00:00.000Z",
      "updatedDate": "2026-05-07T00:00:00.000Z",
      "freshnessDate": "2026-05-07T00:00:00.000Z",
      "keywords": [
        "OpenClaw: what it is and why it matters",
        "An AI-native personal operations platform that orchestrates agents for your digital life. Here's what OpenClaw does and why it's worth paying attention to.",
        "openclaw",
        "agents",
        "personal AI",
        "openclaw",
        "understand-landscape",
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders",
        "agents",
        "coding-agents",
        "models",
        "orchestration",
        "local-runtime",
        "evaluation",
        "infrastructure",
        "interfaces",
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first",
        "open-adjacent-included"
      ],
      "related": [
        {
          "relation": "topic-hub",
          "kind": "hub",
          "id": "openclaw",
          "title": "OpenClaw",
          "url": "https://letsopen.ai/topics/openclaw",
          "machineUrl": "https://letsopen.ai/agent/topics/openclaw.txt"
        }
      ],
      "audience": [
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders"
      ],
      "builderStage": "understand-landscape",
      "stackLayers": [
        "agents",
        "coding-agents",
        "models",
        "orchestration",
        "local-runtime",
        "evaluation",
        "infrastructure",
        "interfaces"
      ],
      "useCases": [
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "understand-open-ai-strategy",
        "design-agent-workflows"
      ],
      "opennessSignals": [
        "open-source-first",
        "open-adjacent-included"
      ],
      "intentKeywords": [
        "understand-landscape",
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders",
        "agents",
        "coding-agents",
        "models",
        "orchestration",
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        "evaluation",
        "infrastructure",
        "interfaces",
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first",
        "open-adjacent-included"
      ]
    },
    {
      "kind": "guide",
      "id": "best-open-source-ai-tools-2026",
      "title": "Best open source AI tools for builders (2026)",
      "description": "A curated, opinionated guide to open-source-first AI tools and open-adjacent builder tools that are actually worth using in 2026.",
      "tags": [
        "guide",
        "tools",
        "curated"
      ],
      "url": "https://letsopen.ai/guides/best-open-source-ai-tools-2026",
      "machineUrl": "https://letsopen.ai/agent/guides/best-open-source-ai-tools-2026.txt",
      "date": "2026-03-09T00:00:00.000Z",
      "updatedDate": "2026-05-07T00:00:00.000Z",
      "freshnessDate": "2026-05-07T00:00:00.000Z",
      "keywords": [
        "Best open source AI tools for builders (2026)",
        "A curated, opinionated guide to open-source-first AI tools and open-adjacent builder tools that are actually worth using in 2026.",
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        "tools",
        "curated",
        "open-source-ai-tools",
        "select-tools",
        "ai-app-builders",
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        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first",
        "open-weight-aware",
        "open-adjacent-included"
      ],
      "related": [
        {
          "relation": "topic-hub",
          "kind": "hub",
          "id": "open-source-ai-tools",
          "title": "Open Source AI Tools",
          "url": "https://letsopen.ai/topics/open-source-ai-tools",
          "machineUrl": "https://letsopen.ai/agent/topics/open-source-ai-tools.txt"
        },
        {
          "relation": "same-topic",
          "kind": "guide",
          "id": "how-to-evaluate-open-source-ai-projects",
          "title": "How to evaluate open source AI projects",
          "url": "https://letsopen.ai/guides/how-to-evaluate-open-source-ai-projects",
          "machineUrl": "https://letsopen.ai/agent/guides/how-to-evaluate-open-source-ai-projects.txt"
        },
        {
          "relation": "same-topic",
          "kind": "article",
          "id": "why-open-ai-needs-to-be-open",
          "title": "Why AI needs to be open",
          "url": "https://letsopen.ai/articles/why-open-ai-needs-to-be-open",
          "machineUrl": "https://letsopen.ai/agent/articles/why-open-ai-needs-to-be-open.txt"
        }
      ],
      "audience": [
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders",
        "tool-evaluators"
      ],
      "builderStage": "select-tools",
      "stackLayers": [
        "agents",
        "coding-agents",
        "models",
        "inference",
        "retrieval",
        "orchestration",
        "local-runtime",
        "evaluation",
        "infrastructure",
        "interfaces"
      ],
      "useCases": [
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
        "design-agent-workflows"
      ],
      "opennessSignals": [
        "open-source-first",
        "open-weight-aware",
        "open-adjacent-included"
      ],
      "intentKeywords": [
        "select-tools",
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders",
        "tool-evaluators",
        "agents",
        "coding-agents",
        "models",
        "inference",
        "retrieval",
        "orchestration",
        "local-runtime",
        "evaluation",
        "infrastructure",
        "interfaces",
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "compare-ai-development-tools",
        "run-ai-locally",
        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first",
        "open-weight-aware",
        "open-adjacent-included"
      ]
    },
    {
      "kind": "guide",
      "id": "how-to-evaluate-open-source-ai-projects",
      "title": "How to evaluate open source AI projects",
      "description": "A practical framework for deciding which open source AI projects are worth using, watching, or contributing to.",
      "tags": [
        "guide",
        "evaluation",
        "open source",
        "builders"
      ],
      "url": "https://letsopen.ai/guides/how-to-evaluate-open-source-ai-projects",
      "machineUrl": "https://letsopen.ai/agent/guides/how-to-evaluate-open-source-ai-projects.txt",
      "date": "2026-03-10T00:00:00.000Z",
      "updatedDate": "2026-05-07T00:00:00.000Z",
      "freshnessDate": "2026-05-07T00:00:00.000Z",
      "keywords": [
        "How to evaluate open source AI projects",
        "A practical framework for deciding which open source AI projects are worth using, watching, or contributing to.",
        "guide",
        "evaluation",
        "open source",
        "builders",
        "open-source-ai-tools",
        "evaluate",
        "ai-app-builders",
        "agent-builders",
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        "model-builders",
        "agents",
        "models",
        "orchestration",
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        "evaluation",
        "infrastructure",
        "interfaces",
        "build-agent-systems",
        "choose-open-source-ai-stack",
        "select-builder-tools",
        "run-ai-locally",
        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first"
      ],
      "related": [
        {
          "relation": "topic-hub",
          "kind": "hub",
          "id": "open-source-ai-tools",
          "title": "Open Source AI Tools",
          "url": "https://letsopen.ai/topics/open-source-ai-tools",
          "machineUrl": "https://letsopen.ai/agent/topics/open-source-ai-tools.txt"
        },
        {
          "relation": "same-topic",
          "kind": "guide",
          "id": "best-open-source-ai-tools-2026",
          "title": "Best open source AI tools for builders (2026)",
          "url": "https://letsopen.ai/guides/best-open-source-ai-tools-2026",
          "machineUrl": "https://letsopen.ai/agent/guides/best-open-source-ai-tools-2026.txt"
        },
        {
          "relation": "same-topic",
          "kind": "article",
          "id": "why-open-ai-needs-to-be-open",
          "title": "Why AI needs to be open",
          "url": "https://letsopen.ai/articles/why-open-ai-needs-to-be-open",
          "machineUrl": "https://letsopen.ai/agent/articles/why-open-ai-needs-to-be-open.txt"
        }
      ],
      "audience": [
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders"
      ],
      "builderStage": "evaluate",
      "stackLayers": [
        "agents",
        "models",
        "orchestration",
        "local-runtime",
        "evaluation",
        "infrastructure",
        "interfaces"
      ],
      "useCases": [
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        "choose-open-source-ai-stack",
        "select-builder-tools",
        "run-ai-locally",
        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
        "design-agent-workflows"
      ],
      "opennessSignals": [
        "open-source-first"
      ],
      "intentKeywords": [
        "evaluate",
        "ai-app-builders",
        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders",
        "agents",
        "models",
        "orchestration",
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        "interfaces",
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        "understand-open-ai-strategy",
        "design-agent-workflows",
        "open-source-first"
      ]
    },
    {
      "kind": "guide",
      "id": "open-source-agent-app-blueprint",
      "title": "A practical open source AI agent app blueprint",
      "description": "A builder-first blueprint for assembling an AI agent app with open source components: model runtime, orchestration, tools, memory, evaluation, and deployment boundaries.",
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        "architecture",
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      ],
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      "machineUrl": "https://letsopen.ai/agent/guides/open-source-agent-app-blueprint.txt",
      "date": "2026-05-07T00:00:00.000Z",
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          "kind": "hub",
          "id": "open-source-ai-agents",
          "title": "Open Source AI Agents",
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          "machineUrl": "https://letsopen.ai/agent/topics/open-source-ai-agents.txt"
        },
        {
          "relation": "same-topic",
          "kind": "comparison",
          "id": "open-source-ai-agents-vs-closed-ai-assistants",
          "title": "Open source AI agents vs closed AI assistants",
          "url": "https://letsopen.ai/comparisons/open-source-ai-agents-vs-closed-ai-assistants",
          "machineUrl": "https://letsopen.ai/agent/comparisons/open-source-ai-agents-vs-closed-ai-assistants.txt"
        },
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          "kind": "article",
          "id": "why-open-source-ai-agents-matter-now",
          "title": "Why open source AI agents matter now",
          "url": "https://letsopen.ai/articles/why-open-source-ai-agents-matter-now",
          "machineUrl": "https://letsopen.ai/agent/articles/why-open-source-ai-agents-matter-now.txt"
        }
      ],
      "audience": [
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        "agent-builders",
        "self-hosters",
        "platform-engineers",
        "model-builders"
      ],
      "builderStage": "architect",
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        "open-weight-aware"
      ],
      "intentKeywords": [
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    },
    {
      "kind": "guide",
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        "evaluate-open-source-projects",
        "understand-open-ai-strategy",
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      "related": [
        {
          "relation": "topic-hub",
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      ]
    },
    {
      "kind": "comparison",
      "id": "codex-vs-claude-code-vs-gemini-cli",
      "title": "Codex CLI vs Claude Code vs Gemini CLI",
      "description": "A practical comparison of the three major terminal-based coding agents. Which one should you use, and when?",
      "tags": [
        "coding agents",
        "comparison",
        "tools"
      ],
      "url": "https://letsopen.ai/comparisons/codex-vs-claude-code-vs-gemini-cli",
      "machineUrl": "https://letsopen.ai/agent/comparisons/codex-vs-claude-code-vs-gemini-cli.txt",
      "date": "2026-03-09T00:00:00.000Z",
      "updatedDate": "2026-05-07T00:00:00.000Z",
      "freshnessDate": "2026-05-07T00:00:00.000Z",
      "keywords": [
        "Codex CLI vs Claude Code vs Gemini CLI",
        "A practical comparison of the three major terminal-based coding agents. Which one should you use, and when?",
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        "tools",
        "coding-agents",
        "Claude Code for complex codebases, Codex CLI for sandboxed tasks, Gemini CLI for Google ecosystem integration.",
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        "ai-app-builders",
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