STATE pkt. 2 scoped a measurement of the substring guards against tmp_path-
GENERATED artefacts. Measured, not reasoned: every one of the 18 assertions
behind those 11 line refs was detached for real and each is individually
load-bearing. Mutation matrix (src/lib mutated in place, restored + sha-verified,
`git status` clean before and after):
M1 render_table drops rows -> ingest_lb:91, sql_lb:104,105 RED
M2 SQL NULL -> naive str() "None" -> sql_lb:61,62 RED
M3 whole REAL loses its .0 -> sql_lb:69 RED
M4 _update_index_lines over-reaches -> ingest_lb:165,166,189 sql:162 RED
M5 _update_index_lines under-reaches -> ingest_lb:188 (negative) RED
M6 _link_in_index no-op -> ingest_lb:169, sql_lb:164 RED
M7 collision gate clobbers first -> test_ingest:141 RED
M8 index label leaks the rationale -> step8:179,180,194 (negative) RED
M9 index label varies per verdict -> step8:186,187,188 RED
M10 re-promotion double-links -> step8:170 RED
M11 fold drops the rationale prose -> step8:151 RED
M12 seeding re-mints the verdict id -> step8:163,164 RED
A second pass was required because pytest stops at the FIRST failing assert:
six assertions sat behind a failing one and were therefore unmeasured at test
level. Re-run with the preceding assertion neutralised, each of those six is
load-bearing too (ingest_lb:91-B, :166; sql_lb:62, :105; step8:180, :164).
The finding is structural, and it is the reason this commit is not empty. Five
NEGATIVE assertions carried no positive control, so they measure an absence
without ever establishing the presence. Proven by value-proof (not merely a red
proof): under a plausible drift — `_link_in_index` detached, or `description`
stopped carrying the rationale — all three tests stayed GREEN with the control
removed and go RED with it present. green-without / red-with is what makes these
controls value-adding rather than decorative.
test_ingest_loadbearing.py the ingest-edge link is asserted PRESENT, in
exactly the form the removal assertion seeks
test_step8_promotion_loadbearing the marker/rationale are asserted live in the
promoted file before the index/context
exclusions are allowed to mean anything
Next lens, enumerated rather than assumed: the class reaches 23 test files, not
the 4 STATE named — ~34 negative substring assertions in total. "Negative without
a positive control" is the sharp, cheap successor to "substring assertion".
Suite 688 passed; ruff + ruff format + mypy --strict clean.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PzEtJzL6SKYbYtSQRY5o57
Kjell Tore Guttormsen
123ecc3113