fix: README audit — 42 TDD tests + hall detection + 7 claim fixes (#835)

* fix: README audit — match every claim to shipped code + add hall detection

TDD audit: wrote 42 tests verifying README claims against codebase.
Fixed all 7 failures:

1. Tool count: 19 → 29 (10 tools were undocumented)
2. Added tool table rows for tunnels, drawer management, system tools
3. Version badge: 3.1.0 → 3.2.0
4. dialect.py file reference: "30x lossless" → "AAAK index format for closet pointers"
5. Wake-up token cost: "~170 tokens" → "~600-900 tokens" (matches layers.py)
6. pyproject.toml version in project structure: v3.0.0 → v3.2.0
7. Hall detection: added detect_hall() to miner.py — drawers now tagged
   with hall metadata so palace_graph.py can build hall connections

New code:
- miner.py: detect_hall() — keyword scoring against config hall_keywords,
  writes hall field to every drawer's metadata
- tests/test_hall_detection.py — 12 TDD tests (written before code)
- tests/test_readme_claims.py — 42 TDD tests verifying README accuracy

859/859 tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: resolve ruff lint — unused imports and variables

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* style: ruff format with CI-pinned 0.4.x

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: use conftest fixtures in hall tests for Windows compat

Windows CI fails with NotADirectoryError when ChromaDB tries to
write HNSW files in short-lived TemporaryDirectory. Use conftest
palace_path and tmp_dir fixtures instead — same pattern as all
other tests that touch ChromaDB.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: address Igor's review — convo_miner halls, cached config, markdown typo

TDD: wrote tests for convo_miner hall metadata and config caching
BEFORE verifying the code changes.

1. README markdown typo: extra ** in wake-up token row (line 195)
2. convo_miner.py: added _detect_hall_cached() — conversation
   drawers now get hall metadata (was missing, Igor caught it)
3. miner.py + convo_miner.py: cached hall_keywords at module level
   so config.json isn't re-read per drawer during bulk mine
4. New tests: TestConvoMinerWritesHalls, TestDetectHallCaching

861/861 tests pass. ruff clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mempalace/convo_miner.py

@@ -25,6 +25,26 @@ from .palace import (
 )
 
 
+# Cached hall keywords — avoids re-reading config per drawer
+_HALL_KEYWORDS_CACHE = None
+
+
+def _detect_hall_cached(content: str) -> str:
+    """Route content to a hall using cached keywords. Same logic as miner.detect_hall."""
+    global _HALL_KEYWORDS_CACHE
+    if _HALL_KEYWORDS_CACHE is None:
+        from .config import MempalaceConfig
+
+        _HALL_KEYWORDS_CACHE = MempalaceConfig().hall_keywords
+    content_lower = content[:3000].lower()
+    scores = {}
+    for hall, keywords in _HALL_KEYWORDS_CACHE.items():
+        score = sum(1 for kw in keywords if kw in content_lower)
+        if score > 0:
+            scores[hall] = score
+    return max(scores, key=scores.get) if scores else "general"
+
+
 # File types that might contain conversations
 CONVO_EXTENSIONS = {
     ".txt",
@@ -318,6 +338,7 @@ def _file_chunks_locked(collection, source_file, chunks, wing, room, agent, extr
                         {
                             "wing": wing,
                             "room": chunk_room,
+                            "hall": _detect_hall_cached(chunk["content"]),
                             "source_file": source_file,
                             "chunk_index": chunk["chunk_index"],
                             "added_by": agent,