10. Build an AI Research Agent

flowchart TD
    subgraph PLANNER["Planner Agent"]
        DECOMP["Decompose Question\nInto sub-questions"]
        STRATEGY["Search Strategy\nWhich sources to query"]
        QUERIES["Generate Search Queries\n10-20 queries"]
    end
    subgraph SEARCHER["Search Agent"]
        WEB_S["Web Search\nBing/Google"]
        ACADEMIC["Academic Search\nPubMed/arXiv"]
        INTERNAL["Internal KB\nVector search"]
    end
    subgraph READER["Reading Agent"]
        EXTRACT["Extract Content\nKey facts, stats, quotes"]
        SUMMARIZE_SRC["Source Summary\nPer-source summary"]
        EVAL_SRC["Source Evaluation\nCredibility check"]
    end
    subgraph SYNTHESIZER["Synthesis Agent"]
        COMBINE["Combine Findings\nThematic grouping"]
        CROSS["Cross-reference\nVerify across sources"]
        IDENTIFY_GAPS["Identify Gaps\nWhat's still unknown"]
    end
    subgraph WRITER["Writing Agent"]
        OUTLINE["Generate Outline\nExecutive summary"]
        DRAFT["Draft Report\nStructured content"]
        CITE["Add Citations\nEvery claim sourced"]
        REVIEW["Self-Review\nFactuality check"]
    end

    PLANNER --> SEARCHER
    SEARCHER --> READER
    READER --> SYNTHESIZER
    SYNTHESIZER --> WRITER

    style PLANNER fill:#3b82f6,color:#fff
    style SEARCHER fill:#f59e0b,color:#fff
    style READER fill:#8b5cf6,color:#fff
    style SYNTHESIZER fill:#6366f1,color:#fff
    style WRITER fill:#22c55e,color:#fff

sequenceDiagram
    participant U as User
    participant P as Planner
    participant S as Searcher
    participant R as Reader
    participant Synth as Synthesizer
    participant W as Writer

    U->>P: "Research: Impact of AI on healthcare"
    P->>P: Decompose: (1) Clinical AI, (2) Diagnostics, (3) Drug discovery, (4) Ethics
    P->>P: Generate 15 search queries
    P->>S: Execute searches

    S->>S: Search web (30 results)
    S->>S: Search PubMed (20 papers)
    S->>S: Search internal KB
    S-->>P: 50 sources collected

    P->>R: Read and extract sources
    R->>R: Extract key facts per source
    R->>R: Summarize each source
    R->>R: Evaluate credibility
    R-->>P: 50 source summaries

    P->>Synth: Synthesize findings
    Synth->>Synth: Group by theme
    Synth->>Synth: Cross-reference claims
    Synth->>Synth: Identify gaps
    Synth-->>P: Synthesized analysis

    P->>W: Generate report
    W->>W: Create outline
    W->>W: Draft each section
    W->>W: Add citations
    W->>W: Self-review
    W-->>U: Final report