chore: bootstrap project structure

- .wiki/ with canonical Karpathy layout (CLAUDE.md, index, log, overview, raw)
- .tasks/ with canonical STATUS.md board
- CLAUDE.md with skill triggers
- Bootstrap manifest in .wiki/concepts/

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.wiki/raw/README.md

@@ -0,0 +1,11 @@
+# Raw Sources
+
+**Immutable.** Read, never edit. The only allowed modification is appending a `> Status:` blockquote when the user explicitly asks for a status audit.
+
+Place raw inputs here — articles, transcripts, PDFs, screenshots — exactly as they came in. The agent reads from `raw/`, writes summaries into `../sources/`, and never modifies raw files.
+
+For large or path-sensitive sources outside the repo, register them here:
+
+```
+- short-name → /absolute/path/to/source
+```