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docs: close 2 cross-runtime parity gaps + document unified log

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Companion to lakehouse 98b6647. Architecture comparison decisions
tracker now captures:

  - Go validatord direct header read (fixes 6847bbc): closes the
    case where Langfuse-off middleware passthrough silently dropped
    forwarded X-Lakehouse-Trace-Id
  - Rust IterateResponse trace_id echo (fixes 98b6647): closes the
    asymmetry where Go's response carried the join key and Rust's
    didn't
  - Unified longitudinal log demonstrated end-to-end: both daemons
    co-writing /tmp/lakehouse-validator/sessions.jsonl, distinct
    daemon tags, one DuckDB query covers both

24/24 parity assertions (validator 6/6, extract_json 12/12,
session_log 4/4, materializer 2/2) hold against live :3100 + :4110.
Both runtimes deployed with today's full stack.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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2026-05-02 06:25:21 -05:00
co-authored by Claude Opus 4.7
parent 6847bbc180
commit a21a34b057
6 changed files with 6 additions and 5 deletions
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STATE_OF_PLAY.md
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# STATE OF PLAY — Lakehouse-Go
**Last verified:** 2026-05-02 ~10:30 CDT
**Last verified:** 2026-05-02 ~11:30 CDT
**Verified by:** **production-readiness gauntlet** — 21/21 smoke chain green, per-component scrum across 4 bundles, **3 cross-runtime parity probes all green post-fix** (validator: **6/6 match** after wire-format alignment shipped; materializer: 2/2 after omitempty fix; extract_json: 12/12). All findings surfaced by the parity probes have been actioned. Disposition: `reports/cutover/gauntlet_2026-05-02/disposition.md`.
> **Read this FIRST.** When the user says "we're working on lakehouse," default to the Go rewrite (this repo); the Rust legacy at `/home/profit/lakehouse/` is maintenance-only. If memory contradicts this file, this file wins. Update it when something is verified working — not when a phase finishes.