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Quality

Deepen

by JuliusBrussee

Deepen is a Quality skill for Claude Code, published by JuliusBrussee in cavekit.

1.1K stars86 forkson JuliusBrussee/cavekitAdded 2026/08/20Repository updated 2026/08/14
claude-codeparallel-agentsskillsspec-driven-developmenttest-driven-development
Install in seconds
Install Deepen
Copy Deepen into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.
terminal
npx degit https://github.com/JuliusBrussee/cavekit/tree/main/skills/deepen ~/.claude/skills/deepen

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/JuliusBrussee/cavekit.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file
skills/deepen/SKILL.md in JuliusBrussee/cavekit
Installs to
~/.claude/skills/deepen
Collection
One of 9 skills cataloged from this repository
Category
Quality1354 skills

What Deepen does

Deepen finds the shallowest modules in the code the spec touches, researches a deeper design, and proposes refactors that shrink interfaces and hide decisions while keeping behavior constant and tests green before and after.

Deepen is cataloged under Quality on DirSkills. Deepen comes from a repository tagged claude-code, parallel-agents, skills, spec-driven-development and test-driven-development.

Documentation

README

deepen — make modules deep

Behavior is sacred: tests green before AND after. Every change shrinks an interface or hides a decision — deepen, don't churn.

A deep module hides a lot behind a small interface; a shallow one's interface costs as much to use as writing the code yourself. Complexity = dependencies + obscurity, and it compounds. Deepen spends spare usage paying that down before it becomes a §B. Run it when the build is green & you have budget to drain — not under deadline.

WHEN TO DEEPEN

  • Build is green, tests pass, & you have token budget spare.
  • A module's interface feels as complex as its implementation (shallow smell).
  • The same change keeps touching many files (change amplification).
  • User explicitly asks to improve design quality.

This is the opening of the README. Read the full README on GitHub.

Commands Deepen provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

  • /spec
  • /build

Frequently asked about Deepen

  • What else does JuliusBrussee publish alongside Deepen?

    Deepen is one of 9 skills that DirSkills catalogs from JuliusBrussee/cavekit, the repository it ships in. Its siblings there include Adversarial Spec Review, Backprop and Build. Each one is a separate skill with its own page in this directory, installs the same way Deepen does, and is maintained by JuliusBrussee in that same repository. The rest of the collection is listed on the JuliusBrussee/cavekit page.

  • How does Deepen compare to other Quality skills?

    Deepen ranks #769 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Deepen against them. Open each page to compare what they document and how they install.

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Deepen is one of 9 skills cataloged on DirSkills from JuliusBrussee/cavekit.

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