JS WAM persistent indexed fact stores (GP-LMDB) - #4211
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Extend D27 CallFactStream with source(P/2, indexed(Prefix)) (zero-dep sorted key table) and source(P/2, lmdb(Dir)) (lazy npm lmdb, loud missing-package error, never a silent fallback). file(Path) emit is unchanged. Ship uw_fact_index / uw_fact_lmdb builders and document the on-disk format, key encoding, and optional-dependency policy. Co-authored-by: johns243a <johns243a@gmail.com>
lmdb-js treats a path with an extension as the data file; edges.lmdb as a directory then throws EISDIR. Both the loader and runtime now open an environment directory. Bound-lookup stats also record n_reads. Co-authored-by: johns243a <johns243a@gmail.com>
Co-authored-by: johns243a <johns243a@gmail.com>
sub_string(..., 12, ...) skipped the leading digit of 506, so the proof printed 6. Require bytes_read > 200 so a mis-parse cannot pass. Co-authored-by: johns243a <johns243a@gmail.com>
Co-authored-by: johns243a <johns243a@gmail.com>
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September 1, 2026 20:24
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Add persistent indexed P/2 fact stores for the JavaScript WAM, extending D27
CallFactStreamrather than forking it.Option syntax
source(P/2, file(Path))— D27 in-memory TSV/CSV/JSONL. Emit is unchanged ({ path }, nokind).source(P/2, indexed(Prefix))— backend B (default capability, zero deps). Files:Prefix.data+Prefix.idx.source(P/2, lmdb(Dir))— backend A (opt-inlmdbnpm package).Diris an LMDB environment directory (noSubdir: false, so names likeedges.lmdbstay directories).Unbound A1 enumerates in source-file order. Bound A1 is an indexed lookup. Other-args-bound filters streamed candidates. Cells go through
parse_term(D34/D37).Backend B
Sorted key table + binary search (
Buffer.compare). Build:node scripts/js_wam/uw_fact_index.js build <tsv|jsonl> <prefix>. Format spec is indocs/WAM_JAVASCRIPT_STATUS.md. This is LMDB-style (persistent + indexed + seek-based), not LMDB.Bound-lookup proof on the 5004-row fixture:
fact_io bytes_read=506 data_size=992872 n_reads=29.Backend A
Lazy
createRequire("lmdb")only when anlmdb(...)source is used. Missing package is one loud error (npm install lmdb); never falls back to B. Not a repopackage.jsondependency. The lmdb-gated tests ran in this environment (npm install --prefix /tmp/uw-lmdb-pkg lmdb).Shared-semantics: SWI
probekey → [alpha,beta]; Node backends B and A both printshared_ok/true.Tests
UW_LMDB_FORCE_MISSING=1).Out of scope
Multi-arg secondary indexes and write paths.
docs/WAM_FLEET_GAPS.mdis not edited; the JS status doc records that this target now has LMDB while the fleet doc still lists it as Lua-matching out-of-scope.