# Anthropic TypeScript SDK v0.81.0 — sdk: v0.81.0

- Product: Anthropic TypeScript SDK (https://whatsnew.fyi/product/anthropic-sdk-typescript)
- Vendor: Anthropic
- Date: 2026-03-31
- Version: v0.81.0
- Original notes: https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.81.0
- Permalink: https://whatsnew.fyi/product/anthropic-sdk-typescript/releases/v0.81.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Add .type field to APIError for error kind identification
- **fixed** — Append path separator in validatePath prefix check for memory

##### 0.81.0 (2026-03-31)

Full Changelog: [sdk-v0.80.0...sdk-v0.81.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.80.0...sdk-v0.81.0)

###### Features

* add .type field to APIError for error kind identification ([#790](https://github.com/anthropics/anthropic-sdk-typescript/issues/790)) ([4bf637d](https://github.com/anthropics/anthropic-sdk-typescript/commit/4bf637d962c2203ca7977d4e5447e2b083e29188))


###### Bug Fixes

* **memory:** append path separator in validatePath prefix check ([0ac69b3](https://github.com/anthropics/anthropic-sdk-typescript/commit/0ac69b3438ee9c96b21a7d3c39c07b7cdb6995d9))


###### Chores

* **ci:** run builds on CI even if only spec metadata changed ([70b657a](https://github.com/anthropics/anthropic-sdk-typescript/commit/70b657aac1be76e941885dfe9d683c45a57ad005))
* **ci:** skip lint on metadata-only changes ([69bdc94](https://github.com/anthropics/anthropic-sdk-typescript/commit/69bdc94a16e5402b8fd19d54a1f4695cba834dbb))
* **internal:** codegen related update ([7ff7390](https://github.com/anthropics/anthropic-sdk-typescript/commit/7ff7390029867195adf78e6dbfaa43d8bb0a9720))
* **internal:** update gitignore ([46d6667](https://github.com/anthropics/anthropic-sdk-typescript/commit/46d66675d59da125c0a00cc8feb6a13bc6105637))
* **internal:** update multipart form array serialization ([d55b07d](https://github.com/anthropics/anthropic-sdk-typescript/commit/d55b07d4f791763738fd54a032cd421b6d16d151))
* **tests:** bump steady to v0.19.4 ([4957a5e](https://github.com/anthropics/anthropic-sdk-typescript/commit/4957a5e65bdc77528f81c123ec2865784c064055))
* **tests:** bump steady to v0.19.5 ([c511ae0](https://github.com/anthropics/anthropic-sdk-typescript/commit/c511ae042129805400c5286a02d3c45f49e51ca6))
* **tests:** bump steady to v0.19.6 ([6d2b4b9](https://github.com/anthropics/anthropic-sdk-typescript/commit/6d2b4b910a687c2cf73bb51450ce24c704fdc384))
* **tests:** bump steady to v0.19.7 ([d6cff9d](https://github.com/anthropics/anthropic-sdk-typescript/commit/d6cff9d2c8688fb95dc6af0f89ae33480f9758e0))
* **tests:** bump steady to v0.20.1 ([284561f](https://github.com/anthropics/anthropic-sdk-typescript/commit/284561fe36b244f5b6ab624ec2608c07f71f476e))