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Field notes.

Issue 51 · July 2026Prompt engineering, quietly

Writing about the craft of prompting, the shape of agents, and the small engineering decisions that make models useful in real work.

№ 01 · Featuredai tools9 min read

TiDB Vector Search vs Split Stacks

Master TiDB Vector Search and see why unified SQL plus vector stacks are catching up to split architectures. Read the full guide.

RephraseJune 5, 2026Read the essay →
Recently  ·  July 2026
  1. № 02

    Pinecone vs Qdrant vs Weaviate

    Master Pinecone vs Qdrant vs Weaviate for production RAG with a practical decision framework, trade-offs, and examples. Read the full guide.

    ai tools
    RephraseJune 6, 2026  ·  9 min read
  2. № 03

    Chunking: Stop Splitting Sentences Mid-Thought

    Learn how to choose page-level vs fixed-size chunking for RAG, keep sentences intact, and improve retrieval quality. Read the full guide.

    prompt engineering
    RephraseJune 6, 2026  ·  8 min read
  3. № 04

    Hybrid Retrieval: Why the Stack Won

    Learn how BM25, vectors, RRF, and rerankers work together in production RAG. See patterns, tradeoffs, and real examples inside. Try free.

    prompt engineering
    RephraseJune 5, 2026  ·  9 min read
  4. № 05

    Why RAG Fails in Retrieval

    Learn why most RAG failures start in retrieval, not generation, and how to fix chunking, search, and routing before tuning prompts. Try free.

    prompt engineering
    RephraseJune 4, 2026  ·  7 min read
  5. № 06

    Memory Layers in AI: Where to Store Each

    Learn how to map short-term, episodic, semantic, and procedural memory to the right storage layer, with examples, trade-offs, and retrieval tips. Try free.

    prompt engineering
    RephraseJune 4, 2026  ·  9 min read
  6. № 07

    Agent Governance Toolkit Guardrails Explained

    Discover how Microsoft Agent Governance Toolkit guardrails stop rogue agent actions in milliseconds, with architecture notes, risks, and examples. Read the full guide.

    prompt engineering
    RephraseJune 6, 2026  ·  9 min read
  7. № 08

    Claude Subscriptions and OpenClaw: What Now

    Learn how to adapt OpenClaw after Anthropic's subscription change, protect your workflow, and choose safer access paths. Read the full guide.

    ai news
    RephraseJune 4, 2026  ·  7 min read
  8. № 09

    Pydantic AI's Type-First Edge

    Learn how Pydantic AI borrows FastAPI's type-first philosophy to make agents safer, clearer, and easier to maintain. See examples inside.

    prompt engineering
    RephraseJune 6, 2026  ·  7 min read
  9. № 10

    LangGraph vs CrewAI vs Microsoft

    Compare LangGraph, CrewAI, and Microsoft Agent Framework for production agents, then choose the stack that fits your 12-month roadmap. Read the full guide.

    prompt engineering
    RephraseJune 6, 2026  ·  8 min read
  10. № 11

    Claude Agent SDK Hooks Explained

    Learn how Claude Agent SDK hooks mirror Claude Code's production architecture, with safety, context, and delegation patterns. Read the full guide.

    prompt engineering
    RephraseJune 3, 2026  ·  7 min read
  11. № 12

    Google ADK and A2A Explained

    Discover how Google ADK and A2A let 50+ partner frameworks interoperate across vendors, with practical patterns, examples, and guardrails. Read the full guide.

    prompt engineering
    RephraseJune 3, 2026  ·  8 min read
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