Tutorial: Building a CLAUDE.md File for Claude Code

ArticleRui Sousa, Luis SousaTutorial

Rui and Luis Sousa share an approach to loading permanent business context into Claude Code via a root CLAUDE.md file, eliminating the need to repeatedly explain business details in every new session.

Key points

  1. Claude Code automatically loads CLAUDE.md from the project root at the start of every session.
  2. A structured interview prompt collects details across eight areas: identity, offer, audience, channels, voice, no-gos, tech stack, and quarterly focus.
  3. The interview outputs a concise 'Business Snapshot' that serves as the single source of truth.
  4. A second architect prompt converts the snapshot into a structured CLAUDE.md file kept under 200 lines.
  5. The configuration specifies project context, voice, hard rules, default behaviors, working styles, and reference file links.

Why it matters

Without persistent context, developers and operators waste time re-briefing AI agents during every session. Embedding business constraints and tone rules directly into the repository standardises output and workflow efficiency.

Analysis

The authors treat agent configuration as an engineering artifact within the repository. Splitting the process into an interactive interview followed by structured markdown generation helps extract concrete constraints and negative prompts rather than generic advice. Keeping the file under 200 lines prevents context bloat while providing clear behavioural guidelines.

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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