Vendor Capability Matrices
The book is concept-focused (Ch 4 reasoning models, Ch 8 agents and computer use). Vendor specifics live here because the half-life of any specific surface is shorter than the print cycle. Each matrix carries a verified date so readers can judge freshness; quarterly refresh keeps the catalog honest.
Reasoning Models
OpenAI o-series, DeepSeek R-series, Anthropic extended thinking, Gemini Flash Thinking, GPT-5 reasoning modes. Capability deltas across visible-vs-hidden chain, thinking-budget controls, cost variance, and Anthropic's faithfulness caveat from Claude's extended thinking.
Matrix scaffolding pending. Target ship: same date as the book.
Agents and Computer Use
Claude Computer Use, OpenAI Operator/CUA, Project Mariner, Devin, plus the open-source agent frameworks. Capability deltas across confirmation-gate patterns, monitor-model implementations, sandboxing, and side-effect controls.
Matrix scaffolding pending. Target ship: same date as the book.
MCP Adopters
Cross-reference to the MCP server catalog. Block, Apollo, Zed, Replit, Codeium, Sourcegraph, plus community projects. Which capabilities each implements, which client surfaces consume them.
Open MCP Catalog →This page is the entry point. Individual matrices ship as Tier 1 content before the book's launch (see COMPANION-SITE-PLAN.md for the build order).