feat(shapes): the practice is written where it is read, and the coverage line measures the slip (milestone 439 step 6)

- reusing-code: "Before the turn ends — say what you built" — the four
  verdicts, the one classify_shapes(repo=…) call, and the component file as a
  shape. Description names the end-of-turn moment.
- shape-accounting: the writer judges; audits are the check that it held.
  The write path SUGGESTS (no more hook instances); component file rows and
  whole-file canon described; scoped covers Svelte too.
- _INSTRUCTIONS reuse line: "before the turn ends, say what you built
  (create_snippet the reusable, classify_shapes the rest)" — 1570/1600.
- Coverage line: "written-shape check (7d): N turns checked, M asked, K left
  unjudged", from the Stop hook's recorded outcomes; silent until the
  question has been put.
- test_guidance_ownership pins the new topic on reusing-code.
- prior-art hook header no longer says it stamps instance rows.

Plugin version minted.

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

tests/test_pattern_coverage.py

@@ -907,3 +907,16 @@ def test_a_file_is_a_unit_when_it_renders_and_nothing_inside_carries_its_name(pa
     from scribe.services.coverage import class_references, extract_definitions, is_file_unit
 
     assert is_file_unit(path, text, extract_definitions(text), class_references(path, text)) is unit
+
+
+def test_the_line_says_whether_writers_judged_what_they_wrote():
+    """Milestone 439: the write-time figure — silent until the question has
+    been put, then turns checked, asked, and asks walked past."""
+    from scribe.services.coverage import coverage_line
+    base = {"accounted": 10, "total": 10, "counts": {"exempt": 10},
+            "unclassified": 0, "computed_at": "2026-10-01T00:00:00"}
+    assert "written-shape check" not in coverage_line(base)
+    assert "written-shape check" not in coverage_line(
+        {**base, "write_time": {"checked": 0, "asked": 0, "left": 0, "days": 7}})
+    line = coverage_line({**base, "write_time": {"checked": 12, "asked": 4, "left": 1, "days": 7}})
+    assert line.endswith("; written-shape check (7d): 12 turns checked, 4 asked, 1 left unjudged")