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docs(spec): UDF registration over UniFFI (#180) - #730
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Fallible try_register_predicate/try_register_aggregate with UdfError and QRY-014, a per-query function-registry snapshot so UDFs may call back into the database, and the UniFFI foreign traits for every UniFFI binding. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015NBT2Yx9JUQKYvv2CvC9py
…i::export Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015NBT2Yx9JUQKYvv2CvC9py
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Design spec for #180:
docs/superpowers/specs/2026-10-24-udf-uniffi-design.md.try_register_predicate/try_register_aggregatetaking closures that returnResult<_, UdfError>; existing methods unchanged.Err, or a foreign callback that throws) fails the query with new codeQRY-014— never read asfalse/nil.RwLock<Arc<FunctionRegistry>>, snapshotted at query open; no lock is held across a UDF call, so UDFs may query, write, register or checkpoint the same database (INT-001inside aWriteTransactionunchanged).MiniGrafPredicate,MiniGrafAggregate,MiniGrafAccumulatorfor the template, Python, Java, Android and Swift bindings; lifecycle and threading documented.Part of #180 (spec only).
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