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hop: two implementations of one 23-parameter contract (rename the stale file + widen the cross-engine pin matrix now; unification as a tracked follow-up)

Status: Open.

#1917 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL: declared schema + strictness levels for absent labels/properties (design; local vs remote divergence; dead env knob)

Status: Open.

#1916 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL Cypher: datetime() filters silently match zero rows; temporal + is string concatenation (round-010)

Status: Open.

#1915 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL: legitimate .edges() rebind resurrects a STALE adjacency index (silent wrong answers, both engines) + documented recovery fails

Status: Open.

#1913 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL Cypher: WITH rebind onto a live alias is unguarded; edge-ident column collision (round-008)

Status: Open.

#1911 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL Cypher: ungrouped-aggregate identity row lost when a later stage empties the stream (round-007)

Status: Open.

#1909 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL perf follow-ups from the #1905 trail-correction work (pandas ~2%, polars q8@20k)

Status: Open.

#1908 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL Cypher: undirected unbounded [*] row projection off the trail lane (impossible rows; count-twin break)

Status: Open.

#1906 In graphistry/pygraphistry;

· lmeyerov opened on Aug 15, 2026

GFQL Cypher: count(*) trail uniqueness + list-param equality leak (round-006 umbrella)

Status: Open.

#1905 In graphistry/pygraphistry;

· lmeyerov opened on Aug 14, 2026

GFQL Cypher: var-length path trail semantics + lane-dependent cardinality (round-005 umbrella)

Status: Open.

#1903 In graphistry/pygraphistry;

· lmeyerov opened on Aug 14, 2026

GFQL Cypher: numeric operator conformance + expression-lane typing (round-004 umbrella)

Status: Open.

#1900 In graphistry/pygraphistry;

· lmeyerov opened on Aug 14, 2026

GFQL Cypher: row-pipeline multiplicity + aggregate identities (round-004 umbrella)

Status: Open.

#1899 In graphistry/pygraphistry;

· lmeyerov opened on Aug 14, 2026