Individual skill
improve-codebase-architecture
Find deepening opportunities in a codebase, informed by the domain language in CONTEXT.md and the decisions in docs/adr/. Use when the user wants to improve architecture, find refactoring opportunities, consolidate tightly-coupled modules, or make a codebase more testable and AI-navigable.
skills/engineering/improve-codebase-architecture/SKILL.md
Source commit 1c04afc2a760ed58cea1308851e7626f76c4ff44
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- Last checked
- Nov 6, 2026
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- Repository last updated
- Oct 24, 2026
- License
- Apache-2.0
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- claude-code Repository topic
- agent-skills Repository topic
- agentic-workflow Repository topic
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- ai-agent Repository topic
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- codex Repository topic
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DEEPENING.mddoc · 2,565 bytesINTERFACE-DESIGN.mddoc · 2,725 bytesLANGUAGE.mddoc · 3,804 bytesSKILL.mdcore · 5,140 bytes
Read excerpt
# Improve Codebase Architecture
Surface architectural friction and propose **deepening opportunities** — refactors that turn shallow modules into deep ones. The aim is testability and AI-navigability.
## Glossary
Use these terms exactly in every suggestion. Consistent language is the point — don't drift into "component," "service," "API," or "boundary." Full definitions in [LANGUAGE.md](LANGUAGE.md).
- **Module** — anything with an interface and an implementation (function, class, package, slice).
- **Interface** — everything a caller must know to use the module: types, invariants, error modes, ordering, config. Not just the type signature.
- **Implementation** — the code inside.
- **Depth** — leverage at the interface: a lot of behaviour behind a small interface. **Deep** = high leverage. **Shallow** = interface nearly as complex as the implementation.
- **Seam** — where an interface lives; a place behaviour can be altered without editing in place. (Use this, not "boundary.")
- **Adapter** — a concrete thing satisfying an interface at a seam.