[NePreby]

Overview

Resolves #5 by implementing download-based proportional split weight suggestions for dependencies in the split architecture cascade.

Changes

1. Hamilton-Hare Largest Remainder Allocator (allocateWeightsByDownloads in frontend/src/lib/manifest.ts):

   • Strictly enforces the sum of basis points to equal targetBps (default 9000, 90.00%) with zero rounding drift.
   • Guarantees each dependency receives at least minFloorBps (default 50 bps / 0.50%) when feasible, scaling down floor dynamically for large trees.
   • Allocates proportional integer quotas from unreserved basis points, sorting remainders in descending order to assign single basis points.
   • Safely handles negative / NaN downloads, empty lists, single dependencies, and zero-download fallbacks to equalWeights.

2. Registry Download Fetchers:

   • fetchCrateDownloads(name): Queries https://crates.io/api/v1/crates/{name} -> crate.downloads.
   • fetchNpmDownloads(name): Queries https://api.npmjs.org/downloads/point/last-month/{name} -> downloads.
   • suggestDependencyWeights(deps, targetBps, minFloorBps): Queries download metrics in parallel across ecosystems.

3. User Interface Integration (frontend/src/pages/Cascades.tsx):

   • Added Suggest weights button in the Split architecture section header aside (next to Equalize).
   • Integrated loading spinner during parallel fetching and auto-updates rows in place.

4. Unit Tests (frontend/src/lib/__tests__/weights.test.ts):

   • 12 comprehensive test cases covering zero downloads, floor scaling, single item, remainder distribution, crates.io/npm mock parsing, and parallel suggestion integration.
   • Verified 70/70 passing tests and clean tsc -b.

Closes #5.

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Bounty Payout Wallet (TRC20 USDT / TRX):
TMqmJjRgVS21NL2eFtfyHciTxvE4BqGmEv