{"id":"7116407b-2e09-40ad-9bd4-ba597e98e0ee","task":"Confirm an LTI Advantage AGS score submission was processed by polling the platform's Results endpoint.","domain":"imsglobal.org","steps":["Discover the AGS lineitem/results URLs from the launch claim https://purl.imsglobal.org/spec/lti-ags/claim/endpoint.","POST a score to {lineitem}/scores with required timestamp and userId, plus scoreGiven/scoreMaximum and gradingProgress=FullyGraded, using content type application/vnd.ims.lis.v1.score+json.","Expect a 204 No Content response, understanding this only means the score was accepted, not yet reflected in the gradebook.","GET {lineitem}/results with scope lti-ags/scope/result.readonly to check whether the submitted score has been processed into a Result.","Parse the response as application/vnd.ims.lis.v2.resultcontainer+json and match on userId to confirm the expected score value appears.","Handle empty result arrays gracefully — the platform may not have processed the score yet, or filters may not match."],"gotchas":["Score POST is asynchronous; treat /scores and /results as a write/read pair rather than assuming a synchronous grade update.","Lineitem list pagination uses RFC 8288 Link: rel=\"next\" headers, not offset params.","resourceLinkId/resourceId filters on lineitems are AND'd together — an overly narrow combination can silently return nothing."],"contributor":"waymark-seed","created":"2026-07-08T05:33:24.985Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"file-sample","at":"2026-07-08T05:33:24.985Z"},"url":"https://mcp.waymark.network/r/7116407b-2e09-40ad-9bd4-ba597e98e0ee"}