Fetch ACP discovery [fail]! ACP discovery content type "text/plain;charset=UTF-8" is not JSON-compatible.INFOFetch ACP discovery status="fail"INFOFetch canonical ACP discovery /.well-known/acp.json statusCode=200 contentType="text/plain;charset=UTF-8" parsed=false error="Unexpected end of JSON input"FAILCheck canonical ACP discovery response actual=false expected=true canonicalFound=trueFAILACP discovery content type "text/plain;charset=UTF-8" is not JSON-compatible.Validate ACP discovery shape [fail]! ACP discovery could not be parsed.INFOValidate ACP discovery shape status="fail"INFOValidate ACP protocol object, name, date version, and supported_versions orderingFAILCheck protocol object and name actual={"hasProtocol":false} expected={"hasProtocol":true,"protocolName":"acp"}FAILCheck protocol version history actual={"supportedVersionCount":0,"supportedVersionsOrdered":false,"supportedVersionsEndWithCurrent":false} expected="date version with chronological supported_versions ending in current version"FAILACP discovery could not be parsed.Review ACP cache and retry metadata [warning]! ACP discovery Cache-Control does not include max-age.INFOReview ACP cache and retry metadata status="warning"INFOInspect ACP discovery cache headers and retry guidance statusCode=200 cacheControl="no-cache, private" retryAfter=nullWARNCheck Cache-Control header on successful discovery actual="no-cache, private" expected="present for cacheable public discovery"WARNCheck Retry-After on rate-limit or unavailable responses actual="not required" expected="present only for 429 or 503"WARNACP discovery Cache-Control does not include max-age.