Ingest 2026-08-21: DOJ investigates a16z (new page); Mechanistic Tomography; Bun 1.4 WebView; /wayfinder skill

[hornof]

Summary

Daily Brief 2026-08-21. Top headlines re-surface (Import AI 469, GLM-5.3 "Death of Params," Fable-5 redeploy, smolvm/Morrell — folded #247/#253, deduped). Net-new: 1 new page + 3 folds.

New page:

• companies/a16z — anchored on the DOJ antitrust investigation into a16z board conflicts under Clayton Act §8 (interlocking directorates) — reported as the first VC-focused action under the 112-year-old dormant statute; the signal is regulatory pressure on concentrated AI-infrastructure board seats (a novel front aimed at the investor/board layer, not the labs). a16z was long overdue a page — it co-leads the open-weights coalition and hosts the a16z podcast (the Garry Tan founder-thesis conversation).

Folds:

• mechanistic-interpretability — Mechanistic Tomography (arXiv 2608.19338): reframes patching/gradients/Hessians as designed measurement; the constraint becomes what can I access / what's my budget, not which technique. Control-oriented.
• bun — Bun 1.4 Bun.WebView (Willison's shot-scraper JSON API): first captured post-Rust-rewrite user-facing feature — evidence the Zig→Rust port is now shipping capability, not just parity.
• matt-pocock + skill-md — /wayfinder greenfield-planning skill: SKILL.md authored for discovery/orientation (find the spec worth writing), broadening the primitive beyond repeatable-capability.

Watch-items (roundup): medical/safety-critical ML papers (Holtercare-Bench ECG, Alzheimer's-continuum, helicopter-weight ED-324 — owner health-adjacent); proof-sharing limits in NN verification; sub-50ms TTS (Qwen/NARI). Poolside "$12B reverse-execuhire" left unfolded — the brief itself flags it as "likely satire or heavily garbled; unverified."

Judgment calls

• Created a16z on the DOJ anchor + its long recurring presence (coalition co-lead, podcast host) — a legitimate entity page, not a stub. Flagged marc-andreessen / ben-horowitz as entity-page candidates rather than paging them now.
• Refused to amplify the Poolside item — honored the brief's own "likely satire" flag; kept it as an unverified curiosity in the roundup, not a fold onto poolside.

Test plan

• Daily-Brief dedup ran (2026-08-21.md had 0 log hits); re-surfaced headlines cross-checked vs Ingest 2026-08-17: Anthropic $65B; Stripe buys OpenRouter $7B; Amazon rare-books training data; Copilot-Autofix compromise #247/Ingest 2026-08-20 (brief): Mojo open-sourced (new page); GLM 5.3 'death of params'; Every Model Cheats; Willison sandbox cluster #253
• 0 delta ghost links across 7 touched files (new page's [[y-combinator]] / coalition links resolve); roundup filename in log.md
• Ingest 2026-08-20 (brief): Mojo open-sourced (new page); GLM 5.3 'death of params'; Every Model Cheats; Willison sandbox cluster #253 branch pruned at sync; single linear commit, base main

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