Case studies - real-world qualification
External engineering recorded as reproducible ENTITY evidence
These case studies show what was actually engineered: the external defect, reproducible commands, test results, upstream state and the resulting ENTITY provenance chain.
Learning path: Case studies are evidence demonstrations, not the primary ENTITY curriculum. Start with the code tutorials if you are new to ENTITY.
PyCUBRID #367 - validate timeouts before resource acquisitionA real external engineering campaign: reproduce invalid timeout behavior, add a shared sync/async pre-transport validation control, verify the fix, submit upstream PR #576, then preserve the resulting ENTITY lineage.Yomihon #848 - contract-declared status truthfulnessRed-first regression, canonical contract-driven bilingual status wording, mutation proof, upstream PR #852, ENTITY lineage, DCO instrument and replacement-cost basis.