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datalog: SX-data embedding API (Phase 9, 143/143)
New lib/datalog/api.sx: dl-program-data facts rules takes SX data
lists. Rules accept either dict form or list form using <- as the
rule arrow (since SX parses :- as a keyword). dl-rule constructor
for the dict shape. dl-assert! adds a fact and re-saturates;
dl-retract! drops EDB matches, wipes all rule-headed IDB
relations, and re-saturates from scratch — simplest correct
semantics until provenance tracking arrives.

9 API tests cover ancestor closure via data, dict-rule form,
dl-rule constructor, incremental assert/retract, cyclic-graph
reach, assert into empty, fact-style rule (no arrow), dict
passthrough.
2026-05-08 08:34:08 +00:00

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# datalog scoreboard
**143 / 143 passing** (0 failure(s)).
| Suite | Passed | Total | Status |
|-------|--------|-------|--------|
| tokenize | 26 | 26 | ok |
| parse | 18 | 18 | ok |
| unify | 28 | 28 | ok |
| eval | 15 | 15 | ok |
| builtins | 19 | 19 | ok |
| semi_naive | 8 | 8 | ok |
| negation | 10 | 10 | ok |
| aggregates | 10 | 10 | ok |
| api | 9 | 9 | ok |