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  1. Behind the Craft
  2. How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins
How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft · Apr 22, 2026

Mercury's Ryan Wiggins on building for AI agents, their Claude MCP, and how he built an AI 'second brain' for executive decision-making.

Mercury's Product Head Frames APIs as the 'Bank Branches' of the 2020s

Customer interaction points have evolved from physical branches to websites and mobile apps. In the current platform shift, APIs and conversational interfaces are the new primary channels for customer engagement, akin to a bank branch in the 1950s.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago

A Product Exec Uses AI to Analyze Meeting Transcripts for Performance Review Feedback

By feeding meeting transcripts into a custom AI system, an executive gets daily, specific feedback on his performance goals (e.g., not jumping to solutions). This creates a continuous accountability loop, making formal performance reviews more actionable and impactful.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago

Mercury Frames MCPs as the 'Third-Party Apps' for New AI Platforms

Despite technical debates about bloat, MCPs (Model-Component Packages) serve a crucial strategic role as the "third-party apps" for AI platforms like OpenAI and Anthropic. They provide a vital distribution layer for new products to enter the ecosystem, similar to the App Store.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago

Mercury Uses "Disposable Front-Ends" to Replace Product Specs and Alignment Meetings

Mercury's product team uses a disposable front-end environment where PMs and designers can quickly build and share prototypes. This practice has replaced lengthy spec documents, collapsing the time it takes to validate ideas and get team alignment.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago

A Mercury Exec Built a 5M-Word "Second Brain" to Contextualize All AI Queries

To enhance AI-driven decisions, a product executive compiled a local knowledge base of his work documents from the past five years. This 5-million-word context layer is injected into every query, making the AI's responses deeply relevant and historically aware.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago

A Startup's First AI Model Choice Creates Downstream Lock-In and Ecosystem Loyalty

Data from fintech Mercury shows a startup's initial choice of AI platform (e.g., OpenAI vs. Anthropic) is a critical decision. This choice often dictates subsequent tool adoption and creates significant lock-in as workflows and knowledge bases are built around that initial platform.

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins thumbnail

How to Build for AI Agents and a Claude Code Second Brain in 25 Min | Ryan Wiggins

Behind the Craft·2 days ago