A.Shakhmatov 1892cb7969 plan/spec: the positional gate goes green ...

Scorecard 204 -> 218 pass, 87 -> 73 fail: the fourteen `arrayFilters` cases
across five files, which is the whole of what the two implementation commits
were expected to move and nothing else. Positional corpus 51/51.

The three divergences measured on the way are written into PLAN §6 rather
than left in commit messages: `$` with two predicates on one array that no
element satisfies together, an array filter with a top-level `$and`/`$or`,
and a literal index into a scalar element -- the last being the one place the
positional walk and the plain indexed path now answer differently, which is
worth a commit of its own and needs its own measurements first.

The design review gets an outcome note, since two of its guesses were wrong
and the corpus is where that was settled.

2026-08-10 20:40:41 +03:00

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