feat(ai-cache): add semantic (L2) cache layer#13632

Merged

nic-6443 merged 22 commits into

apache:masterfrom

janiussyafiq:feat/ai-cache-semantic

Jul 2, 2026

Commits on Jun 29, 2026

feat(ai-cache): add layers enum and semantic schema (cosine-only)
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refactor(ai-cache): simplify check_schema to single unconditional check_https call
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feat(ai-cache): add context_fingerprint and partition keying for L2
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feat(ai-cache): add openai and azure_openai embeddings drivers
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feat(ai-cache): add RediSearch vector-search driver
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refactor(ai-cache): drop unused locals; use hex partition in TEST 10
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feat(ai-cache): add semantic orchestration (embed-text, lookup, write)
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fix(ai-cache): harden semantic.lua fail-open boundary (pre-require drivers, guard encode+write)
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feat(ai-cache): wire semantic layer into access/log with L1 backfill
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fix(ai-cache): pcall guard semantic boundary; tighten TEST 14 model isolation
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test(ai-cache): semantic fail-open, tenant isolation, azure driver
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docs(ai-cache): document the semantic (L2) layer
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fix(ai-cache): wire vector index config, require exact layer, lint + polish
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