name: verify description: Verify gochickpeas engine/gql changes end-to-end -- parity gate against real LDBC data plus a public-API sample drive.

Verifying gochickpeas changes

The surface is the library's public API. Two handles, use both for nontrivial engine/gql changes:

1. Parity gate (real data, full pipeline)

go run ./cmd/gqlbench -manifest ~/rustychickpeas-ldbc/viz/data/gql_variants.tsv \
  -verify-only -cached-parity \
  -plans-golden cmd/gqlbench/testdata/plans_golden.txt

Expect 89/89 MATCH, 0 DIFF, 0 SKIP, plus plan-shape golden: 89 queries unchanged. This drives parse -> plan -> exec over SF1/FinBench SF10 exports with pinned row hashes. Loads ~26M rels; takes a few minutes. Never emit (-verify-only) from a dirty tree -- the append-only bench-out protocol stamps engineCommit.

• -cached-parity also checks the auto-parameterized PlanCache path against the same reference hashes (catches literal-vs-cached-plan divergence).

• -plans-golden guards plan QUALITY, which row parity cannot see: a planner change that stays correct still moves the plan, and drift here fails the run. For an INTENTIONAL planner change, review the drift, then regenerate the golden with -plans-golden-capture and commit it in the same change. Do a planner change WITHOUT this and a regression that stays row-correct lands invisibly.

• Run heavy invocations under the shared-box lock -- and not just the gate: full builds, full test runs, fuzz runs, and benchmarks are exactly the multi-core work that lands on top of an ldbc sweep mid-measurement.

  taskman lock run -ttl 20m -wait 30m -reason "<what>" local-cpu -- go build ./...
  taskman lock run -ttl 20m -wait 30m -reason "<what>" local-cpu -- go test ./...
  

  Incremental builds, go vet, and editor-driven builds are fine unlocked. A non-zero exit from lock run means another session holds the box: wait or do unrelated work -- never run the job anyway.

2. Sample drive through the public export

Scratchpad module with a replace directive resolves the local repo:

module verifydrive
require github.com/freeeve/gochickpeas v0.0.0
replace github.com/freeeve/gochickpeas => /Users/efreeman/gochickpeas

Build a small graph with chickpeas.NewBuilder (AddNode/SetProp/AddRel/ SetRelPropAt, then Finalize("name")), run queries with gql.Run, and inspect plans with gql.Explain (e.g. grep the [mono ...] marker on VarExpand lines to see whether a pushdown fired). Probe near-miss phrasings and malformed input; errors should be clean plan/bind errors.

Gotchas:

• Timing on this machine is very noisy; alloc counts (gqlbench profiles output) are the most trustworthy A/B signal. For timing A/Bs, run the whole comparison inside ONE taskman lock run local-cpu session in ABBA order (new-old-old-new): interleaving alone does not cancel a load trend, only ABBA does. A run whose TIMING is the product must also pass -max-load 2 and must not publish on a non-zero exit.
• gqlbench must run from the repo root (HeadStamp shells to git); point -out/-plans-out/-profiles-out at the scratchpad.
• 45s of go test ./gql -fuzz FuzzQuery -fuzztime 45s is cheap insurance after recognizer/planner changes.