release: 0.19.0

[stainless-app]

Automated Release PR

0.19.0 (2026-04-18)

Full Changelog: v0.18.1...v0.19.0

Features

• api: add tenantId to send (3eddd67)
• internal: implement indices array format for query and form serialization (6b0e47e)

Bug Fixes

• client: preserve hardcoded query params when merging with user params (8c48bf3)
• deps: bump minimum typing-extensions version (f968d32)
• ensure file data are only sent as 1 parameter (6c9b9b8)
• pydantic: do not pass by_alias unless set (5c61281)
• sanitize endpoint path params (d4ca0b1)

Performance Improvements

• client: optimize file structure copying in multipart requests (56e6c32)

Chores

• ci: bump uv version (e7115ed)
• ci: skip lint on metadata-only changes (7a77a86)
• ci: skip uploading artifacts on stainless-internal branches (5ad9ccb)
• internal: add request options to SSE classes (fdc5e91)
• internal: codegen related update (a6cc237)
• internal: make test_proxy_environment_variables more resilient (709aff4)
• internal: make test_proxy_environment_variables more resilient to env (df5b863)
• internal: tweak CI branches (a50b7f8)
• internal: update gitignore (f048789)
• test: do not count install time for mock server timeout (e9620f6)
• tests: bump steady to v0.19.4 (2f78979)
• tests: bump steady to v0.19.5 (41a53dc)
• tests: bump steady to v0.19.6 (b952880)
• tests: bump steady to v0.19.7 (c07a4ff)
• tests: bump steady to v0.20.1 (ba432f3)
• tests: bump steady to v0.20.2 (0d2aa8d)
• tests: bump steady to v0.22.1 (02c097b)
• update mock server docs (b4e4ce8)

Refactors

• tests: switch from prism to steady (18f705f)

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🔗 Stainless website
📚 Read the docs
🙋 Reach out for help or questions

[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/ark-python/02c097b129dc7c64bb163a288789e75a95121c60/ark_email-0.18.1-py3-none-any.whl'

Expires at: Mon, 18 May 2026 05:38:32 GMT
Updated at: Sat, 18 Apr 2026 05:38:32 GMT

[stainless-app]

Note: this release PR has been open for more than 60 days. Until this PR is merged, we will temporarily stop pushing codegen updates due to changes to Stainless' codegen.