James Phoenix

Concept Template

James Phoenix
James Phoenix

Use this template for each new concept. Copy and rename.

Definition

[One-sentence definition]

Mental Model

[Analogy or intuition that makes it click]

Leanpub Book

Read The Meta-Engineer

A practical book on building autonomous AI systems with Claude Code, context engineering, verification loops, and production harnesses.

Continuously updated
Claude Code + agentic systems
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Code Example

// Minimal working example

Where I Used It

  • [Project or experiment where this concept was applied]

Gotchas

  • [Common mistakes or misconceptions]

Related Concepts

Sources

  • [Book, article, or documentation link]

Template Usage

  1. Copy this file to concepts/[concept-name].md
  2. Replace bracketed sections with actual content
  3. Link from relevant roadmaps and projects
  4. Update when you gain new insights
Topics
DocumentationTeachingType SafetyWorkflows

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Measuring Coding Agent Leverage

Token volume measures spend, not output. Leverage is what your agents turn into verified, valuable change per unit of human attention, compute, and rework, and no single number captures it. You have to triangulate from several points of view.

James Phoenix
James Phoenix
Cover Image for Using DSL Languages for LLM Harnesses

Using DSL Languages for LLM Harnesses

Unmesh Joshi’s article [DSLs Enable Reliable Use of LLMs](https://martinfowler.com/articles/llm-and-dsls.html) (martinfowler.com, July 2026) names the endgame of something I have been documenting piecemeal for a year: the smaller the language you make the model speak, the less room it has to be wrong.

James Phoenix
James Phoenix