Golden-oracle DO: the fragment snapshot (media_fragments.json) was a
circular self-snapshot generated from the refactored code. Regenerated
it from the pre-refactor BASE post_parser.py (old ladders) so it holds
base bytes — byte-identical to base for all 24 cases. The only 2 §3.14
deltas (file_unique_id_none, webpage_without_photo) moved to a new
REGISTERED_DELTAS registry in media_fragment_replay.py; the fragment
test asserts base bytes for 22 cases and the registered 5b value for 2.
Docstrings corrected to describe base-anchoring (no overclaim); a
WARNING in generate_snapshot() notes it must run against base code only.
Test-coverage DO: added test_exactly_100mb_object_is_collected pinning
the §3.13 guard as strictly '>' (exactly 100MB is still collected).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
agent_coder
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