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tiennm99
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The Go parser has matched the Rust one field-by-field across all four datasets, so the Rust crate is retired and CI builds the Go binary instead. crawl-baotintuc.js moves to go-parser/scripts/ — it is the only mechanism for refreshing data/2017 and has a documented runbook. check-duplicates.js and diff-datasets.js are dropped: both had been broken since before the repo was unified, and neither had a caller. db-stats.js and verify-parity.js are dropped as superseded by differential-parity.mjs, which compares more and cannot silently skip a dataset. The reader-fidelity oracle is kept and marked frozen. It was produced by the Rust reader so it can no longer be regenerated, but it still fails if any single cell of any of the 299 input files reads differently. Source comments cite the original Rust by file and line; those paths resolve at tag pre-go-parser-removal, recorded in go-parser/README.md.
Docs
project-overview.md— goal, scope, constraints, the four datasets, historysystem-architecture.md— data flow, canonical schema, routing, how one frontend serves both exam yearsdata-pipeline.md— Excel parse quirks, per-dataset formats, overflow-sheet gotcha, expected row counts, verifying a rebuilddeployment-guide.md— GitHub Pages workflow, adding a dataset, rollback, troubleshooting