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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 · Featuredprompt engineering8 min read

OpenAI Agents SDK Overhaul: What Changed

Learn how the OpenAI Agents SDK overhaul adds native sandboxing, sub-agents, and first-class MCP to build safer agent workflows. Read the full guide.

RephraseJune 6, 2026Read the essay →
Recently  ·  July 2026
  1. № 02

    Microsoft Agent Framework v1.0 Explained

    Master Microsoft Agent Framework v1.0 by seeing how AutoGen and Semantic Kernel merged into one SDK, with practical patterns and examples inside.

    ai tools
    RephraseJune 3, 2026  ·  8 min read
  2. № 03

    Why MCP 1.x Requires inputSchema

    Discover why MCP 1.x made inputSchema mandatory, how it improves tool discovery, safety, and validation, and what it means for agent builders. Read the full guide.

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

    MCP 0.x to 1.x Migration Guide

    Learn how to migrate MCP 0.x to 1.x with a clear checklist of breaking changes, safer configs, and test-first fixes. Read the full guide.

    tutorials
    RephraseJune 6, 2026  ·  8 min read
  4. № 05

    MCP Server Cards: Discover Capabilities Fast

    Learn how MCP server cards expose tools before connection, so agents and developers can choose safely. See examples inside. Try free.

    prompt engineering
    RephraseJune 2, 2026  ·  8 min read
  5. № 06

    Enterprise SSO for MCP Access

    Learn how enterprise SSO replaces static client secrets in MCP. See OAuth flows, trust boundaries, and practical auth patterns. Read the full guide.

    prompt engineering
    RephraseJune 6, 2026  ·  8 min read
  6. № 07

    MCP Governance Changes Adoption Math

    Learn how vendor-neutral MCP lowers switching risk, speeds integrations, and changes enterprise adoption math. See examples inside.

    ai tools
    RephraseJune 2, 2026  ·  7 min read
  7. № 08

    MCP Apps Beyond Text in Sandboxed iframes

    Learn how MCP Apps use sandboxed iframes to go beyond text, build safer UI tools, and ship richer agent workflows. Read the full guide.

    prompt engineering
    RephraseJune 1, 2026  ·  9 min read
  8. № 09

    MCP Tasks: Async Tool Calls Beat Timeouts

    Learn how MCP Tasks use async call-now, fetch-later patterns to dodge 30-second tool timeouts and keep agents moving. See examples inside.

    prompt engineering
    RephraseJune 1, 2026  ·  7 min read
  9. № 10

    MCP Roadmap 2026: HTTP, Cards, Agents

    Learn how MCP's 2026 roadmap changes transport, discovery, and agent communication-and what it means for builders. Read the full guide.

    tutorials
    RephraseJune 6, 2026  ·  10 min read
  10. № 11

    GPT-5.5 in Codex: Why It's Tuned Differently

    Discover why OpenAI tunes GPT-5.5 differently in Codex, how agentic coding changes prompt strategy, and what developers should do next. Read the full guide.

    prompt engineering
    RephraseJune 1, 2026  ·  8 min read
  11. № 12

    Why Claude Code Limits Became the Product

    Discover why Claude Code's limits sparked developer loyalty, and how rate caps, context budgets, and structure shaped the product story. Read the full guide.

    ai tools
    RephraseJune 6, 2026  ·  7 min read
Page 5 of 51
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