docs(6209): calibration stamp, after-write hook, usage seam, work log, duplicates, skill structure, tuning and rulebook routes, kind surface, prompt filter, moments, strict args, auth, lesson write path

Fourteen more test files: docstrings state the failure each guard defends
as a present-tense shape instead of the incident that found it, and issue,
milestone and rule numbers leave comments and assertion messages.

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

tests/test_calibration_stamp.py

@@ -1,10 +1,9 @@
-"""A tuned number carries the space it was measured in — and only that (#4104).
+"""A tuned number carries the space it was measured in — and only that.
 
 WHY THIS EXISTS
 
-Milestone 416 step 6 answers *"a path for thresholds to be inherited by the next
-version or different model so that they don't have to recalibrate a lot."* The
-mechanism is a stamp: every tuning event records the embedding model and
+A threshold should be inheritable by the next version or a different model
+without recalibrating from scratch. The mechanism is a stamp: every tuning event records the embedding model and
 document shape the number was chosen under, and a mismatch is reported rather
 than left to be noticed.
 
@@ -49,7 +48,7 @@ def test_calibration_stamp_names_the_embedder_and_the_shape():
         "embedding_model": emb.EMBEDDING_MODEL,
         "shape_version": emb.CHUNKER_VERSION,
     }
-    # Two keys, never one fused string (rule 149): a mismatch has to be able to
+    # Two keys, never one fused string: a mismatch has to be able to
     # say WHICH half moved, because a new embedder and a re-cut document
     # invalidate the same numbers for different reasons.
     assert len(stamp) == 2
@@ -136,7 +135,7 @@ def test_a_dial_moved_before_stamps_existed_is_unknown_not_fine():
 
 
 def test_a_model_change_and_a_shape_change_are_reported_apart():
-    """Rule 149. Two conditions, two answers — they call for different work."""
+    """Two conditions, two answers — they call for different work."""
     s = get_surface("prompt_rule")
     live = {"embedding_model": "new/model", "shape_version": 1}
     cal = rt._calibration(_row(model="old/model", shape=1), s, live)
@@ -182,8 +181,7 @@ def test_the_tool_says_nothing_auto_retunes():
     """The contract an agent reads. A stale stamp is a prompt to MEASURE.
 
     Without this, the obvious next move on seeing `stale: true` is to move the
-    dial — which is tuning from a statistic, the exact failure #4102 measured
-    pointing the wrong way.
+    dial — which is tuning from a statistic, which can point the wrong way.
     """
     doc = tool_doc("scribe.mcp.tools.retrieval_tuning", "retrieval_surfaces")
     assert "calibration" in doc