Implement the Custom Meta optimizer Web Worker with Python parity

Objective

Implement the Custom Meta optimizer Web Worker with Python parity.

Notes: Implemented schema/revision-validating optimizer Web Worker with exact universe filtering, 60/36 common-history split, CAGR/Sharpe/Sortino/drawdown exhaustive selection, deterministic ties, progress and terminal cancellation. Python-vs-worker corpus passes. Chromium 149 at 4x CPU on 102x679 production input: load median single run 628 ms; 5 optimizer runs median 182 ms/worst 263 ms, worst progress gap 54 ms. Feature exception and remaining release gates documented in custom-meta-browser-transition.md.

Approach

[reconstructed — uncertain] No dedicated findings Markdown located for t341. Summary reconstructed from research/findings/task-history.json entry and git history. Uncertain fields: detailed approach, exact file list, and metrics beyond the task note.

Files / code / data changed

• No commit SHA confidently associated with t341 in sampled log [reconstructed — uncertain].
• Task-history entry: research/findings/task-history.json#t341

Results

Task note: Implemented schema/revision-validating optimizer Web Worker with exact universe filtering, 60/36 common-history split, CAGR/Sharpe/Sortino/drawdown exhaustive selection, deterministic ties, progress and terminal cancellation. Python-vs-worker corpus passes. Chromium 149 at 4x CPU on 102x679 production input: load median single run 628 ms; 5 optimizer runs median 182 ms/worst 263 ms, worst progress gap 54 ms. Feature exception and remaining release gates documented in custom-meta-browser-transition.md. [reconstructed — uncertain] No quantitative tables recovered for this entry; see git diff and task-history for grounds.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

• See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.

Links

• Task-history: research/findings/task-history.json id t341