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golangLAKEHOUSE/reports/cutover/gauntlet_2026-05-02/parity/extract_json_parity.md
root 5d3996b51d STATE_OF_PLAY: Rust is not maintenance-only as of 2026-05-02 
Frames the Rust system accurately — it's receiving parity work +
infrastructure (Lance gauntlet, sidecar drop, observability parity),
not just security fixes. Points readers at lakehouse/STATE_OF_PLAY.md
+ docs/ARCHITECTURE_COMPARISON.md for the cross-runtime view.

Also commits today's parity probe report regenerations (5/5 still
32/32 post-Lance work).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-02 22:24:14 -05:00

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extract_json parity probe — Rust vs Go

Date: 2026-05-03T03:13:10Z Rust helper: /home/profit/lakehouse/target/release/parity_extract_json (links live gateway::v1::iterate::extract_json) Go helper: ./bin/parity_extract_json_go (links live internal/validator.ExtractJSON)

Identical model-output strings → both runtimes' extract_json. Match = identical {matched, value} JSON output.

Substrate gate: cargo test -p gateway extract_json PASS before probe.

Tally: 12 match · 0 diff (out of 12 fixtures)

No divergences — extract_json parity holds across all fixtures.