codebase-design
Use when a module boundary, interface, domain model, or architecture change needs a durable design decision before implementation.
Skill by Rafcin
Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/rafcin-codebase-design
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
Get the weekly diff
The weekly diff: one email a week with new agent tools, notable updates and grade changes, plus security alerts for tools you follow. Double opt-in, one-click unsubscribe.
About
Use cases: design, agent-building
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/codebase-design
What's inside
- Skill name
codebase-design- Description
- Use when a module boundary, interface, domain model, or architecture change needs a durable design decision before implementation.
- License
- MIT
- Instructions
- 21 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# Codebase Design Design deep modules: concentrate behavior behind a small, testable interface at a clean seam. ## Entry conditions Use for a new or changed module, public contract, domain model, integration seam, or architecture decision. Read callers, tests, and local vocabulary before naming the seam. ## Scope limit Choose the smallest interface that gives callers leverage and keeps knowledge local. Do not redesign unrelated modules, mistake a directory for a boundary, or invent abstraction before a concrete behavior and caller need justify it. ## Exit evidence State the module responsibility, interface, invariants and error behavior, owning files, adapters or external boundaries, public test seam, compatibility decision, and rejected alternative when it affected the choice. ## Next gate Use `plan` for multi-step, delegated, persistent, or risky work. Otherwise hand the agreed seam to `tdd` and `implement` through the declared OMCS route.
From Rafcin/oh-my-codex-slim, MIT.
More from Rafcin/oh-my-codex-slim
- 0.526score
deepwork
Rafcin
Execute an already-approved, multi-step implementation plan with sustained focus, explicit ownership, and continuous verification.
SkillBFreshness: BClaude Code +9 - 0.526score
codemap
Rafcin
Build or refresh a concise repository map when a codebase's modules, entry points, and dependency boundaries must be understood.
SkillBFreshness: BClaude Code +9 - 0.524score
tdd
Rafcin
Implement a feature or bug fix test-first when the user asks for red-green development or the change needs a regression seam.
SkillBFreshness: BClaude Code +9 - 0.524score
omcs
Rafcin
Use when a substantial engineering task needs OMCS risk-gated orchestration, including when the user says use OMCS to solve this issue.
SkillBFreshness: BClaude Code +9 - 0.523score
context
Rafcin
Use when a material product or engineering decision remains unclear after repository evidence has been inspected.
SkillBFreshness: BClaude Code +9 - 0.523score
omcs-orchestrate
Rafcin
Use when an existing workflow invokes the legacy OMCS orchestration skill name for a substantial engineering task.
SkillBFreshness: BClaude Code +9 - 0.523score
implement
Rafcin
Use when a bounded implementation task has settled requirements, declared ownership, and a credible behavior seam.
SkillBFreshness: BClaude Code +9 - 0.521score
verification
Rafcin
Prove a completed change against explicit acceptance criteria before claiming completion, release readiness, or runtime success.
SkillBFreshness: BClaude Code +9 - 0.521score
deep-interview
Rafcin
Clarify an underspecified product or engineering request through one focused question at a time before planning or implementation.
SkillBFreshness: BClaude Code +9 - 0.521score
diagnose
Rafcin
Diagnose a reproducible bug or performance regression by building a tight feedback loop and testing ranked hypotheses before proposing a fix.
SkillBFreshness: BClaude Code +9 - 0.521score
plan
Rafcin
Turn settled requirements into an implementation plan with exact files, interfaces, tests, verification, and safe commit boundaries.
SkillBFreshness: BClaude Code +9 - 0.521score
simplify
Rafcin
Reduce accidental complexity in working code when behavior must remain unchanged and the user wants a smaller, clearer implementation.
SkillBFreshness: BClaude Code +9
Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Aug 26, 2026 (2 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/Rafcin/oh-my-codex-slim
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
More from Rafcin
- 0.526score
codemap
Rafcin
Build or refresh a concise repository map when a codebase's modules, entry points, and dependency boundaries must be understood.
SkillBFreshness: BClaude Code +9 - 0.526score
deepwork
Rafcin
Execute an already-approved, multi-step implementation plan with sustained focus, explicit ownership, and continuous verification.
SkillBFreshness: BClaude Code +9 - 0.524score
omcs
Rafcin
Use when a substantial engineering task needs OMCS risk-gated orchestration, including when the user says use OMCS to solve this issue.
SkillBFreshness: BClaude Code +9 - 0.524score
tdd
Rafcin
Implement a feature or bug fix test-first when the user asks for red-green development or the change needs a regression seam.
SkillBFreshness: BClaude Code +9 - 0.523score
context
Rafcin
Use when a material product or engineering decision remains unclear after repository evidence has been inspected.
SkillBFreshness: BClaude Code +9 - 0.523score
implement
Rafcin
Use when a bounded implementation task has settled requirements, declared ownership, and a credible behavior seam.
SkillBFreshness: BClaude Code +9
Cite this page
codebase-design skill. Agent Mart. https://agentmart.dev/skills/rafcin-codebase-design (last updated 2026-10-24)