fix(teched): cross-link on first-class Devtoberfest session concepts (#2312) - #2420
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Release 1.27.0 → main (production)
…2312) The TechEd<->Devtoberfest related-session cross-link matched TechEd concepts against TUTORIAL concepts reached via Activity.TASKSLUG. On PROD the current- edition Devtoberfest sessions reference activities without a usable TASKSLUG, so the join resolved to null and every related array came back empty despite 83 concepts shared between the two session corpora. #2311 made Devtoberfest sessions first-class KG nodes with their own DevtoberfestSessionConceptLinks. Match session<->session on those directly: - loadDevtoberfestSessionsWithConcepts now reads DevtoberfestSessions + DevtoberfestSessionConceptLinks (owned entities; no cross-container planner facade, no edition/activity/tutorial walk). - Forward direction re-keyed by Devtoberfest session ID (buildRelatedTechEdByDtfSession / computeRelatedTechEdByDtfSession); the schedule feed attaches relatedTechEdSessions by session.ID. - Reverse direction (computeRelatedDevtoberfestByTechEd) unchanged in shape, now fed real overlapping concepts. - Dropped the now-unused tutorial-concept loader, DTF facade import, and visible-status filter. Verified against PROD data: reverse 217 TechEd sessions / 481 links, forward 76 Devtoberfest sessions / 209 links (both were 0).
This was referenced Sep 20, 2026
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Problem
TechEd ↔ Devtoberfest related-session cross-links render empty on PROD (
relatedTechEdSessions: [],relatedDevtoberfestSessions: []) despite both session corpora being enriched into the KG.Root cause: the crosslink matched TechEd concepts against tutorial concepts reached via
Activity.TASKSLUG. On PROD the current-edition Devtoberfest sessions reference activities with no usableTASKSLUG, so that join resolved to null — even though the two session corpora share 83 concepts.Fix
#2311 made Devtoberfest sessions first-class KG nodes with their own
DevtoberfestSessionConceptLinks. Match session↔session on those directly:loadDevtoberfestSessionsWithConceptsreadsDevtoberfestSessions+DevtoberfestSessionConceptLinks(owned entities — no cross-container facade, no edition/activity/tutorial walk).buildRelatedTechEdByDtfSession/computeRelatedTechEdByDtfSession); schedule feed attaches bysession.ID.computeRelatedDevtoberfestByTechEd) shape unchanged, now fed real overlapping concepts.Verification
teched-devtoberfest-crosslink.test.jsrewritten to the session API +build-teched-endpoint.test.js).Flag-gated (
TECHED_DEVTOBERFEST_CROSSLINK_ENABLED) + fail-open unchanged.