Wiki QA Agent Skill

Answers questions about a code repository using source file analysis. Use when the user asks a question about how something works, wants to understand a component, or needs help navigating the codebase.

589 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

151 d ago

last touched

this folder, not the whole repository

Install

one command, takes just this skill from the repository

npx skills add https://github.com/microsoft/skills --skill wiki-qa

The instruction itself

6 sections, as written by the author

Wiki Q&A

Answer repository questions grounded entirely in source code evidence.

When to Activate

User asks a question about the codebase
User wants to understand a specific file, function, or component
User asks "how does X work" or "where is Y defined"

Source Repository Resolution (MUST DO FIRST)

Before answering any question, you MUST determine the source repository context:

Check for git remote: Run git remote get-url origin to detect if a remote exists
Ask the user: _"Is this a local-only repository, or do you have a source repository URL (e.g., GitHub, Azure DevOps)?"_
Remote URL provided → store as REPO_URL, use linked citations: file:line
Local-only → use local citations: (file_path:line_number)
Determine default branch: Run git rev-parse --abbrev-ref HEAD
Do NOT proceed until source repo context is resolved

Procedure

Resolve source repo context (see above)
Detect the language of the question; respond in the same language
Search the codebase for relevant files
Read those files to gather evidence
Synthesize an answer with inline linked citations

Response Format

Use ## headings, code blocks with language tags, tables, bullet lists
Cite sources inline using resolved format:
Remote: src/path/file.ts:42
Local: (src/path/file.ts:42)
Include a "Key Files" table mapping files to their roles (with linked citations in the "File" column)
Include at least 1 Mermaid diagram when the answer involves architecture, data flow, or relationships — a diagram makes the answer 10x more useful
Use tables for any structured data in the answer (component lists, API endpoints, config options, comparisons)
If information is insufficient, say so and suggest files to examine

Rules

ONLY use information from actual source files
NEVER invent, guess, or use external knowledge
Think step by step before answering

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How to use it

Copy the folder

Take microsoft/wiki-qa from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.