新增wiki命令文件

.claude/commands/wiki-query.md

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+Query the LLM Wiki and synthesize an answer.
+
+Usage: /wiki-query $ARGUMENTS
+
+$ARGUMENTS is the question to answer, e.g. `What are the main themes across all sources?`
+
+Follow the Query Workflow defined in CLAUDE.md:
+1. Read wiki/index.md to identify the most relevant pages
+2. Read those pages (up to ~10 most relevant)
+3. Synthesize a thorough markdown answer with [[PageName]] wikilink citations
+4. Include a ## Sources section at the end listing pages you drew from
+5. Ask the user if they want the answer saved as wiki/syntheses/<slug>.md
+
+If the wiki is empty, say so and suggest running /wiki-ingest first.