compiling-builder-agent

To create a project-specific builder agent, this skill scans your local tech stack and writes a concise 50-100 line agent file to .claude/agents/builder.md, implementing task execution rules and a review gate.

A builder agent is a mission-oriented agent file that standardizes how implementation tasks are executed and reviewed. You need one to avoid manual, inconsistent agent setups and keep instructions focused.

Yes, you need a CLAUDE.md file present in your repository. The skill requires CLAUDE.md to validate the environment and cross-reference relevant patterns for each part of the codebase.

The builder agent detects your tech stack by scanning common manifest files in the repository and cross-referencing the results with CLAUDE.md to include relevant patterns for each part of the codebase.

Validation checks enforce CLAUDE.md presence, referenced doc availability, valid YAML frontmatter, an 80% applicability rule, and a strict 50-100 line length limit before writing the builder.md file.

The best way to standardize implementation tasks is generating a builder.md agent file with YAML frontmatter, workflow steps, quality principles, an output format, and a review gate to ensure consistent execution.