Why: A second broken pptx passed the shipped gate despite being unopenable
in Office: parts were all present but presentation.xml and the master used
an undeclared xmlns:r prefix, sldIdLst listed 12 slides while the rels file
wired only one, and [Content_Types].xml overrode only slide1. The prior
part-existence checks cannot see any of these; the generating instance also
predated the first gate deployment.
Evidence: The upgraded gate rejects the real broken file (undeclared
xmlns:r) and 16 synthetic break cases spanning both incident classes, while
passing the manually repaired package and kit output; python round-trip on
the repaired deck extracts all 12 slides. Full-suite receipt follows on the
task card.
Impact: register_artifact now enforces strict namespace declarations across
every XML part, bidirectional consistency between id-lists and relationships
(presentation and masters), and per-part content-type overrides. Error
messages name the broken reference. run_python prompt v3 adds that failed
kit attempts must retry through the kit, never fall back to hand assembly.
Refs: Dev task feature/pptx-gate-reference-integrity
weichen