DIAL response: reframe corpus to development-of-the-mediator criterion, ingest Drive sources, build literature card deck

[rogerSuperBuilderAlpha]

Summary

• Re-anchor the corpus on a development-of-the-mediator criterion instead of holding Belousov et al.'s 25-novel end-product corpus fixed. Primary corpus is now the 6 purpose-built works (Table 2); 23 of their 25 are drawn on opportunistically, with A16 and A19 tested and excluded (reported, not hidden). Abstract, highlights, intro, §3.1/3.2/3.3, §5 intro, limitations, conclusion, data availability, and Appendix A updated to match; corpus_coding.md and SOURCE.md updated in parallel.
• Four Google Docs previously inaccessible mid-session pulled and checked against draft.md; genuinely new material (not already absorbed via corpus/essay.md) ingested as provenance under sources/.
• Ten literature research runs surveyed empirical/theoretical support for claims across §2-§5, producing 194 deduplicated bibliography cards under literature/cards/, an index (REFERENCES.md), and a tiered acquisition list (NEEDS_FULL_TEXT.md).

Known follow-ups (not yet applied in this PR)

• §4.4 cites the wrong DSA article for the audit-obligation claim (should be Art. 37, not 40); the "platforms withhold" framing overstates what's true.
• §4.8's "one version behind" claim is cited to a source (Klug et al. 2023) that doesn't support it.
• §5.2's Shumailov model-collapse citation uses a mismatched mechanism (synthetic-data loop vs. the paper's user-feedback loop).
• §4.7's "fleet training data" claim (M4) is unsupported as stated and needs hedging.
• A provenance question is open: an arXiv preprint (Perry & Ammari 2026) closely matches draft.md's own §4.1 AV sentence and needs a human check before anything is cited or kept.
• The Discussion-theme positional gap against Belousov et al.'s Theme 3/5 (flagged earlier on this branch) is still open.

Test plan

• Read-through of the reframed corpus section (§3.1) for coherence
• Spot-check a handful of literature cards against their source memos
• Resolve the Perry & Ammari provenance question before further citation work

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