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_snippet_duplicates.py

@@ -1,4 +1,4 @@
-"""Tests for the near-duplicate finder (#2088).
+"""Tests for the near-duplicate finder.
 
 The SQL half needs a database and lives in the integration lane; what's covered
 here is the grouping rule — which is where the interesting decisions are — plus
@@ -98,13 +98,13 @@ def test_the_snippet_report_threshold_is_looser_than_the_write_gate():
     report only suggests a merge the operator reviews, so it has to reach
     further or it would never surface the pairs the gate already let through.
     Snippet-only on purpose: note/task floors sit ABOVE the gate because chunk
-    grain (#280) lifts related families over it — see the module comment."""
+    grain lifts related families over it — see the module comment."""
     assert DUPLICATE_DEFAULT_THRESHOLDS["snippet"] < dedup_svc._SEMANTIC_THRESHOLD
 
 
 def test_the_note_and_task_floors_are_stricter_than_the_snippet_floor():
     """At chunk grain, 0.82 is a related-families view; the report's default
-    must point at genuinely-alike records (measured 2026-08-09, note #2551)."""
+    must point at genuinely-alike records."""
     assert DUPLICATE_DEFAULT_THRESHOLDS["note"] == 0.93
     assert DUPLICATE_DEFAULT_THRESHOLDS["task"] == 0.93
 
@@ -119,7 +119,7 @@ async def test_a_failed_scan_returns_an_empty_report_not_an_error():
         patch.object(dedup_svc, "async_session", side_effect=RuntimeError("boom")),
     ):
         out = await dedup_svc.find_duplicate_snippets(1)
-    # The empty report still carries its per-kind `suggestion` (#2547) — a
+    # The empty report still carries its per-kind `suggestion` — a
     # failed scan must be indistinguishable in SHAPE from a clean one, or every
     # consumer needs a second code path for the degraded case.
     assert out["groups"] == [] and out["pairs"] == []