how
Explain how an existing subsystem, feature, or code path works now by tracing repository evidence.
Skill by grugh
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/grugh-how
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.
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What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
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Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/how
What's inside
- Skill name
how- Description
- Explain how an existing subsystem, feature, or code path works now by tracing repository evidence. Use for understanding current behavior, not historical intent.
- License
- MIT
- Metadata
- source: Lauren Tan, pstack: how. · opencode/autoinvoke: false
- Instructions
- 32 lines in SKILL.md · view on GitHub
Files (5)
- LICENSE
- SKILL.md
- openai.yaml · agents/
- explainer-prompt.md · references/
- explorer-prompt.md · references/
SKILL.md (first lines)
# How Explore the codebase to answer "how does X work?" questions. Produce architectural explanations at the level of a senior engineer onboarding onto a subsystem, enough to build a working mental model, not so much that it reads like annotated source code. ## 1. Assess complexity If the scope is ambiguous, state your interpretation and explore. The user can redirect. - **Simple** (a single module, a small utility, a narrow question such as "how does function X work"): no explorers. Explore and explain in one pass in the current context, following `references/explainer-prompt.md` without the explorer-findings section. Go to step 4. - **Complex** (a subsystem spanning multiple files or services, a cross-cutting feature, a full architectural overview): go to step 2. When in doubt, take the simple path. ## 2. Explore (complex only) Decompose the question into 2 to 4 angles, each a distinct slice of the subsystem. When delegation is available and authorized, run independent explorers concurrently using the harness's supported tools and models, each with `references/explorer-prompt.md` and its angle filled in. Give each read access without write authority. Otherwise investigate the same angles sequentially and keep their findings distinct before synthesis; disclose that the exploration was not independent. ## 3. Synthesize (complex only) Once all exploration angles are complete, synthesize their findings into one explanation from `references/explainer-prompt.md` with every explorer's findings filled in. Use a separate explainer when delegation is available and authorized; otherwise perform a distinct synthesis pass yourself. Verify contradictions against the code. ## 4. Present Present the explainer's output. Light edits for clarity or context from the conversation are fine. Do not substantially rewrite it. ## Output format The explanation uses the sections defined in `references/explainer-prompt.md`, dropping any that do not apply: Overview, Key Concepts, How It Works, Where Things Live, Gotchas. Do not edit project files.
From grugh/skills, MIT.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Oct 13, 2026 (16 days ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/grugh/skills
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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SkillAFreshness: AClaude Code +9 - 0.567score
architecture-review
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Audit an existing repository or subsystem for high-value structural simplifications, clearer ownership, and better boundaries.
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Investigate the historical rationale behind code or architecture using source, Git history, and available discussions.
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interrogate
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Review a concrete diff or implementation for correctness, spec compliance, and codebase fit.
SkillAFreshness: AClaude Code +9 - 0.565score
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Challenge unnecessary complexity in a design, implementation, or technical decision when the user explicitly asks for Grug's perspective.
SkillAFreshness: AClaude Code +9 - 0.561score
remember
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Remember a task across sessions in project-local state.
SkillAFreshness: AClaude Code +9
Cite this page
how skill. Agent Mart. https://agentmart.dev/skills/grugh-how (last updated 2026-10-24)