{"schema_version":"kingy-change-evidence-v1","event":{"id":"ct-31cd2aa56b00b22fdb4a5bee","vendor":"Anthropic","category":"changelog","type":"documented_source_change","title":"Claude release notes documentation changed","source_id":"anthropic-changelog","source_url":"https://platform.claude.com/docs/en/release-notes/overview.md","observed_at":"2026-10-21T18:50:12Z","last_unchanged_at":"2026-10-21T16:45:12Z","before_snapshot":"snap-5a4d72e9d1a7d979bb74c1b2b0c2","after_snapshot":"snap-b59dae542a43f81af22ed671588b","before_hash":"38ec4df3947563777e8156d5da98866a705fc902bc4489d2577a35380e968924","after_hash":"da753a24eecea0e04eb0056caa71aeffdb0bc622bb7a3589092c05d4ba222f7c","before_excerpt":"","after_excerpt":"### October 21, 2026 * We've released API version `2026-10-21`. [Migrating to API version 2026-10-21](https://platform.claude.com/docs/en/api/migration-2026-10-21) shows how to upgrade. * We've released new versions of the [client SDKs](https://platform.claude.com/docs/en/cli-sdks-libraries/overview) and the [`ant` CLI](https://platform.claude.com/docs/en/cli-sdks-libraries/cli/quickstart) that send API version `2026-10-21` by default: Python SDK 2.0.0, TypeScript SDK 1.0.0, C# SDK 13.0.0, Go SDK 2.0.0, Java SDK 3.0.0, PHP SDK 1.0.0, Ruby SDK 2.0.0, and `ant` CLI 2.0.0. See [Switch to 2026-10-21](https://platform.claude.com/docs/en/api/migration-2026-10-21#upgrade). * The new SDK and CLI versions also have breaking changes that don't depend on the API version, and they are licensed …","status":"published","scope":"Published documentation; runtime behavior and legal interpretation not established.","before_capture":{"http_status":200,"resolved_url":"https://platform.claude.com/docs/en/release-notes/overview.md","etag":"","last_modified":"","response_date":"Wed, 21 Oct 2026 16:45:12 GMT","source_id":"anthropic-changelog","source_url":"https://platform.claude.com/docs/en/release-notes/overview.md","captured_at":"2026-10-21T16:45:12Z","raw_sha256":"38ec4df3947563777e8156d5da98866a705fc902bc4489d2577a35380e968924","normalized_sha256":"e46cd8632d0f8f0e280f6f4344ee4341ea5006c0edf6db2999f8ebc889105fcb","collector_version":"1.0.0","normalizer_version":"1.1","locale":"en-US","collection_region":"existing hosting; account-independent public request","id":"snap-5a4d72e9d1a7d979bb74c1b2b0c2"},"after_capture":{"http_status":200,"resolved_url":"https://platform.claude.com/docs/en/release-notes/overview.md","etag":"","last_modified":"","response_date":"Wed, 21 Oct 2026 18:50:12 GMT","source_id":"anthropic-changelog","source_url":"https://platform.claude.com/docs/en/release-notes/overview.md","captured_at":"2026-10-21T18:50:12Z","raw_sha256":"da753a24eecea0e04eb0056caa71aeffdb0bc622bb7a3589092c05d4ba222f7c","normalized_sha256":"28cc58b4d9eb071042cd320b5bfe30586e4c7d61f1ae8f48f2553095679dbd88","collector_version":"1.0.0","normalizer_version":"1.1","locale":"en-US","collection_region":"existing hosting; account-independent public request","id":"snap-b59dae542a43f81af22ed671588b"},"display_normalizer_version":"1.1","display_before_sha256":"e46cd8632d0f8f0e280f6f4344ee4341ea5006c0edf6db2999f8ebc889105fcb","display_after_sha256":"28cc58b4d9eb071042cd320b5bfe30586e4c7d61f1ae8f48f2553095679dbd88"},"content_scope":"Changed excerpts and retained capture metadata; complete raw responses archived privately"}