Maturity from run history, pack revision digests, attribute sets, projects and templates (RBT-WP-0008)

Also fixes run lists and scores mixing runs of different packs in one repository.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

rtut/pack.py

@@ -135,3 +135,25 @@ def render(command: str, values: dict[str, str], pack: Pack) -> str:
         return val
 
     return PLACEHOLDER.sub(sub, command)
+
+
+REVIEW_FILE = "REVIEWS.yaml"
+
+
+def digest(pack: "Pack") -> str:
+    """Revision of a pack: hash of every file in its directory, except review records and local state.
+
+    `exercise_status:` lines are ignored, so recording an exercise never changes the revision.
+    """
+    import hashlib
+    h = hashlib.sha256()
+    root = pack.path.resolve().parent
+    for f in sorted(root.rglob("*")):
+        rel = f.relative_to(root)
+        if not f.is_file() or f.name == REVIEW_FILE or ".local" in rel.parts or "__pycache__" in rel.parts:
+            continue
+        data = f.read_bytes()
+        if f.name == "pack.yaml" or f.name.startswith("pack."):
+            data = b"\n".join(x for x in data.split(b"\n") if not x.startswith(b"exercise_status:"))
+        h.update(str(rel).encode() + b"\0" + data + b"\0")
+    return h.hexdigest()[:16]