add: AGENTS.md schema, seed files, sample topic page

AGENTS.md

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+# LangCode Agent Wiki — Schema
+
+## Purpose
+Persistent knowledge base for the LangCode Agent project. Maintained entirely by an LLM agent running on Ollama (Gemma 2 9B). This wiki sits between raw source documents and your questions — knowledge is compiled once here, then kept current.
+
+## Directory Structure
+\`\`\`
+llmwiki/
+├── AGENTS.md          ← this file (schema)
+├── raw/               ← immutable source documents
+│   ├── articles/      ← web articles, blog posts
+│   ├── papers/        ← research papers, technical docs
+│   ├── repos/         ← code repository notes
+│   └── assets/        ← images, downloads, attachments
+└── wiki/              ← LLM-generated, interlinked pages
+    ├── index.md       ← master catalog (updated every ingest)
+    ├── log.md         ← append-only changelog
+    ├── overview.md    ← wiki purpose & architecture
+    ├── concepts/      ← one file per key concept
+    ├── entities/      ← one file per person, org, tool
+    ├── sources/       ← one file per source document
+    └── comparisons/   ← comparative analysis pages
+\`\`\`
+
+## Conventions
+
+### Filenames
+- lowercase, hyphens instead of spaces (e.g. \`self-attention.md\`)
+- no special characters, no camelCase
+- prefix with date for time-sensitive entries: \`2026-05-10-some-event.md\`
+
+### Page Structure
+Every wiki page must follow this template:
+\`\`\`markdown
+# Title
+
+> One-sentence summary of this page.
+
+## Tags
+\`concept\` \`entity\` \`source-name\` \`date\`
+
+## Body
+[Content here — use ## and ### for sections]
+
+## Related
+- [[page-name]] — brief description of connection
+- [[another-page]] — brief description
+
+## Sources
+- [Source Title](raw/sources/filename) — relevant passage or page range
+\`\`\`
+
+## Ingest Procedure
+When a new source is added to \`raw/\`:
+1. Read the source end-to-end
+2. Identify key concepts, entities, claims, and data points
+3. For each: create or update the relevant wiki page in \`wiki/\`
+4. Add/update cross-references using \`[[wikilinks]]\`
+5. Update \`wiki/index.md\` with new/modified pages
+6. Append entry to \`wiki/log.md\` with format:
+   \`\`\`
+   ## YYYY-MM-DD HH:MM — [source filename]
+   - Created: [new pages]
+   - Updated: [modified pages]
+   - Key takeaways: [bullet summary]
+   \`\`\`
+7. Run the lint checklist (below)
+
+## Query Procedure
+When asked a question:
+1. Read \`wiki/index.md\` first to identify relevant pages
+2. Load only those pages (not the entire wiki at scale)
+3. Synthesize answer from compiled wiki knowledge
+4. Cite specific wiki pages: \`[[page-name]]\`
+5. If the answer is valuable and reusable, file it as a new wiki page
+
+## Lint Checklist
+Run weekly or after every 5-10 ingests:
+- [ ] Every page in \`wiki/\` appears in \`index.md\`
+- [ ] Every \`[[wikilink]]\` resolves to an existing file
+- [ ] No two pages cover the same concept (merge duplicates)
+- [ ] Conflicting claims between pages are flagged, not silently overwritten
+- [ ] No orphan pages (pages with zero inbound links)
+- [ ] All pages follow the template structure above
+- [ ] Tags are consistent across related pages
+- [ ] Log entries are present and properly formatted
+- [ ] Sources in \`raw/\` that have been updated are reflected in wiki
+
+## Conflict Resolution
+When sources disagree:
+1. Note both claims explicitly on the relevant page
+2. Cite both sources
+3. Add a "Status" field: \`verified\` / \`disputed\` / \`unverified\`
+4. Do NOT silently overwrite — preserve the history of claims
+
+## Naming Conventions
+- Page titles: Title Case (e.g. "Self-Attention Mechanism")
+- Filenames: lowercase-hyphens (e.g. \`self-attention-mechanism.md\`)
+- Tags: lowercase, hyphens (e.g. \`#attention-mechanism\`)
+
+## Growth Targets
+- After 10-20 sources: start querying the wiki for answers
+- After 50+ sources: consider adding qmd for enhanced search
+- After 100+ sources: review and potentially restructure wiki subdirectories

wiki/topics/llm-wiki-pattern.md

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+# LLM Wiki Pattern (Karpathy)
+
+> A method for building persistent, structured knowledge bases using LLM agents — compiled once, kept current, queried efficiently.
+
+## Tags
+`concept` `methodology` `knowledge-management` `2026-05-10`
+
+## Overview
+Andrej Karpathy proposed the "LLM Wiki" pattern as an alternative to RAG (Retrieval-Augmented Generation). Instead of searching raw documents on every query, an LLM agent incrementally builds and maintains a wiki of interlinked markdown pages.
+
+## Core Architecture
+
+### Three Layers
+1. **Raw Sources** (`raw/`) — Original documents, immutable. Never modified by the LLM.
+2. **Wiki** (`wiki/`) — Structured, interlinked markdown pages compiled by the LLM.
+3. **Schema** (`AGENTS.md`) — Rules, conventions, and workflows. The "operating system" of the wiki.
+
+### Workflows
+- **Ingest**: Drop source in `raw/` → LLM reads, extracts, creates/updates ~10-15 wiki pages per source
+- **Query**: Ask question → LLM reads `index.md` → drills into relevant pages → synthesizes answer with citations
+- **Lint**: Periodically audit wiki for contradictions, orphans, stale claims
+
+## Key Principles
+- One concept = one file
+- Cross-reference everything with `[[wikilinks]]`
+- The LLM owns the wiki directory; humans only edit `raw/` and the schema
+- Good answers get filed back into the wiki as new pages (compounding knowledge)
+- Works with any LLM that can read/write files (Claude Code, Codex, Cursor, local models via Ollama)
+
+## Related
+- [[AGENTS.md]] — Schema file for this wiki
+- [[index]] — Master catalog
+
+## Sources
+- Karpathy's original idea file (GitHub Gist)