## anthropics/anthropic-sdk-python — v1.8.0…v1.9.0

_31 commits._

### Features
- **feat(api): add claude-sonnet-5-5** (a5a25e9)
- **feat(api): add typed event type values to the Managed Agents events list filter** (1b82cd9)
- **feat(tools): optionally run tool calls while the reply streams** (26d0812)
- **feat(api): add between_tools thinking type** (a9a577d)
- **feat(api): cache diagnostics GA — diagnostics on Message / MessageCreateParams** (22062b8)
- **feat(api): add include_inherited and source to workspace rate limits** (0bf4af8)

### Fixes
- **fix(client): send no placeholder filename for unnamed file uploads** (9e9709d)
- **fix(helpers): degrade between_tools thinking to disabled on fallback hops (#952)** (a3834d4)
- **fix(messages): accept diagnostics in stream() and parse() (#929)** (fad840c)

### Backend
- **Merge pull request #1958 from anthropics/release-please--branches--main--changes--next** (a7285e9)
- **release: 1.9.0** (3e2ac95)
- **codegen metadata** (24b1d55)
- **codegen metadata** (2264bd8)
- **codegen metadata** (ebb8239)
- **codegen metadata** (94f8fe5)
- **codegen metadata** (9daad54)
- **codegen metadata** (a3e9bf4)
- **codegen metadata** (03dc223)
- **codegen metadata** (3a6082e)
- **codegen metadata** (7a7819f)
- **Merge branch 'main' into next** (3365631)

### Docs
- **docs: list importable type names in api.md** (56a42ab)
- **docs(api): prefer each field's own description over its shared type's** (d79a2e7)
- **docs(claude.md): add function body spacing rule** (3174f8f)
- **docs: add field docstring spacing rule to CLAUDE.md** (e5c35f4)

### Chore
- **chore(docs): clarify that stream: true returns the raw event stream** (82918fa)
- **chore(api): list the known model ids first in the Model types** (e5a082a)
- **chore(client): stop sending beta header from parse and tool runner (#907)** (1428100)
- **chore(ci): choose the CI runner by repository** (39ccf62)
- **chore(docs): make Managed Agents actor descriptions resource-neutral** (34ef524)
- **chore(docs): restore the research-preview notice on the Dream type** (f03e32e)

_Recap by [Repo Wrapped](https://repowrapped.com/gh/anthropics/anthropic-sdk-python?utm_source=github-action)._