golangLAKEHOUSE/lakehouse.toml
root c1e411347a G0 D4: ingestd CSV → Parquet → catalogd register · 2 scrum fixes
Phase G0 Day 4 ships ingestd: multipart CSV upload, Arrow schema
inference per ADR-010 (default-to-string on ambiguity), single-pass
streaming CSV → Parquet via pqarrow batched writer (Snappy compressed,
8192 rows per batch), PUT to storaged at content-addressed key
datasets/<name>/<fp_hex>.parquet, register manifest with catalogd.
Acceptance smoke 6/6 PASS including idempotent re-ingest (proves
inference is deterministic — same CSV always produces same fingerprint)
and schema-drift → 409 (proves catalogd's gate fires on ingest traffic).

Schema fingerprint is SHA-256 over (name, type) tuples in header order
using ASCII record/unit separators (0x1e/0x1f) so column names with
commas can't collide. Nullability intentionally NOT in the fingerprint
— a column gaining nulls isn't a schema change.

Cross-lineage scrum on shipped code:
  - Opus 4.7 (opencode):                       4 WARN + 3 INFO (after 2 self-retracted BLOCKs)
  - Kimi K2-0905 (openrouter):                 1 BLOCK + 2 WARN + 1 INFO
  - Qwen3-coder (openrouter):                  2 BLOCK + 2 WARN + 2 INFO

Fixed (2, both Opus single-reviewer):
  C-DRIFT: PUT-then-register on fixed datasets/<name>/data.parquet
    meant a schema-drift ingest overwrote the live parquet BEFORE
    catalogd's 409 fired → storaged inconsistent with manifest.
    Fix: content-addressed key datasets/<name>/<fp_hex>.parquet.
    Drift writes to a different file (orphan in G2 GC scope); the
    live data is never corrupted.
  C-WCLOSE: pqarrow.NewFileWriter not Closed on error paths leaks
    buffered column data + OS resources per failed ingest.
    Fix: deferred guarded close with wClosed flag.

Dismissed (5, all false positives):
  Qwen BLOCK "csv.Reader needs LazyQuotes=true for multi-line" — false,
    Go csv handles RFC 4180 multi-line quoted fields by default
  Qwen BLOCK "row[i] OOB" — already bounds-checked at schema.go:73
    and csv.go:201
  Kimi BLOCK "type assertion panic if pqarrow reorders fields" —
    speculative, no real path
  Kimi WARN + Qwen WARN×2 "RecordBuilder leak on early error" —
    false convergent. Outer defer rb.Release() captures the current
    builder; in-loop release runs before reassignment. No leak.

Deferred (6 INFO + accepted-with-rationale on 3 WARN): sample
boundary type mismatch (G0 cap bounds peak), string-match
paranoia on http.MaxBytesError, multipart double-buffer (G2 spool-
to-disk), separator validation, body close ordering, etc.

The D4 scrum produced fewer real findings than D3 (2 vs 6) — both
were architectural hazards smoke wouldn't catch because the smoke's
"schema drift → 409" assertion was passing even in the corrupted-
state world. The 409 fires correctly; what was wrong was the PUT
having already mutated the live parquet before the validation check.
Opus's PUT-then-register read of the order is exactly the kind of
architectural insight the cross-lineage scrum is designed to surface.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-28 23:50:10 -05:00

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TOML

# Lakehouse-Go config — G0 dev defaults. Overrides via env are a
# G1+ concern; for G0 edit this file and restart the affected service.
# G0 dev ports — shifted to 3110+ so the Go services run alongside
# the live Rust lakehouse on 3100/3201-3204 without colliding. G5
# (demo cutover) flips gateway back to 3100 when Rust retires.
[gateway]
bind = "127.0.0.1:3110"
[storaged]
bind = "127.0.0.1:3211"
[catalogd]
bind = "127.0.0.1:3212"
storaged_url = "http://127.0.0.1:3211"
[ingestd]
bind = "127.0.0.1:3213"
storaged_url = "http://127.0.0.1:3211"
catalogd_url = "http://127.0.0.1:3212"
[queryd]
bind = "127.0.0.1:3214"
[s3]
endpoint = "http://localhost:9000"
region = "us-east-1"
bucket = "lakehouse-go-primary" # G0 dedicated bucket so Rust + Go coexist
access_key_id = "" # populated by SecretsProvider from /etc/lakehouse/secrets-go.toml
secret_access_key = "" # ditto
use_path_style = true
[log]
level = "info"