Add LLM Wiki Agent — persistent LLM-maintained knowledge base

Replaces dual-agent demo with a full personal knowledge base system
where Claude reads source documents and incrementally builds and
maintains a structured, interlinked wiki of markdown pages.

- tools/ingest.py: reads a source, extracts knowledge, updates wiki pages
- tools/query.py: queries the wiki with Claude, optionally files answers back
- tools/lint.py: health-checks the wiki (orphans, contradictions, gaps)
- tools/build_graph.py: two-pass graph builder (wikilinks + Claude inference)
  with Louvain community detection and vis.js interactive HTML output
- CLAUDE.md: schema and workflow instructions for the LLM
- wiki/: starter index, log, and overview pages
- raw/, graph/: directory scaffolding

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

wiki/log.md

@@ -0,0 +1,9 @@
+# Wiki Log
+
+Append-only chronological record of all operations.
+
+Format: `## [YYYY-MM-DD] <operation> | <title>`
+
+Parse recent entries: `grep "^## \[" wiki/log.md | tail -10`
+
+---