docs(6209): snippets, rule embeddings, notes, ledger ageing and references, routes, reporting, handshake, lesson kind, request deadlines, contract-around-change, family models

Twelve more test files drop issue, milestone, rule, note, lesson and
snippet numbers and the dated or one-project figures that recorded how
each property was found; the docstrings state the property and why it
holds. The contract-around-the-change guard keeps the dict-key example as
the failure a signature-watcher misses.

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

tests/test_reporting_back_skill.py

@@ -1,4 +1,4 @@
-"""The reporting-back skill keeps its shape (milestone 409 step 2).
+"""The reporting-back skill keeps its shape.
 
 WHY THIS EXISTS
 
@@ -14,8 +14,8 @@ Structure, never wording — the same reason test_create_tools_disambiguate
 gives: a test that punishes rewriting gets deleted. It pins that the
 completion report keeps its five sections, that placement is taken from the
 record rather than recalled, and that the shipped shapes stay domain-neutral.
-Whether the guidance is any good is milestone 409's last step, read against
-real replies, not something a test can see.
+Whether the guidance is any good is read against real replies, not something a
+test can see.
 """
 import pathlib
 import re
@@ -39,14 +39,13 @@ def test_the_completion_report_keeps_its_sections():
 
 
 def test_a_request_for_approval_has_its_own_named_section():
-    """The operator, 2026-09-15 (#4084): a session's go-ahead request sat inside
-    a completion list as "Blocked by the permission check", and read as a
-    fault rather than a question waiting on them. The heading is what they
-    scan for, so it is pinned by name."""
+    """A go-ahead request inside a completion list, as "Blocked by the
+    permission check", reads as a fault rather than a question waiting on the
+    operator. The heading is what they scan for, so it is pinned by name."""
     from scribe.services import reply_shapes
 
     assert "Approval requested" in _text()
-    # The kinds moved to the delivered shapes (milestone 500): the asks shape
+    # The kinds live in the delivered shapes: the asks shape
     # carries the Approval kind, and the core sends a held action there.
     assert "**Approval**" in reply_shapes.SHAPES["asks"].text
     assert "Approval requested" in reply_shapes.core().text
@@ -70,7 +69,7 @@ def test_the_shipped_shapes_assume_no_particular_domain():
 
 
 def test_the_skill_points_at_the_delivered_shapes_instead_of_restating_them():
-    """Milestone 500 step 4: the shapes are server product, delivered at their
+    """The shapes are server product, delivered at their
     moments. The skill says where they come from and holds the reasoning."""
     text = _text()
     assert "list_reply_shapes" in text and "Reply shape · Every reply" in text