release: 0.5.0

[stainless-app]

Automated Release PR

0.5.0 (2026-01-30)

Full Changelog: v0.4.0...v0.5.0

⚠ BREAKING CHANGES

• replace special flag type omittable with just null
• use camel casing for all class properties

Features

• add BaseResponse class for accessing raw responses (b803fb8)
• add idempotency header support (113b79f)
• allow both model class instances and arrays in setters (71aa7fc)
• api: add support for Structured Outputs in the Messages API (9fd43ce)
• api: migrate sending message format in output_config rather than output_format (d334157)
• better support for pagination mechanisms (829ee6e)
• improved phpstan type annotations (cc981bb)
• replace special flag type omittable with just null (e1137de)
• simplify and make the phpstan types more consistent (9f536fe)
• split out services into normal & raw types (5ba5dbf)
• support unwrapping envelopes (0ed53db)
• use camel casing for all class properties (90f0805)

Bug Fixes

• a number of serialization errors (e318451)
• correctly serialize dates (af8260d)
• support arrays in query param construction (779413f)
• typos in README.md (cb61dee)

Chores

• add git attributes and composer lock file (006c7c2)
• be more targeted in suppressing superfluous linter warnings (4b8cbf5)
• ci: Add Claude Code GitHub Workflow (#240) (4fd215b)
• ensure constant values are marked as optional in array types (66cf88c)
• formatting (5878c16)
• internal: add a basic client test (8835b21)
• internal: codegen related update (1c218af)
• internal: codegen related update (7240372)
• internal: codegen related update (9557a1c)
• internal: codegen related update (a8a13ec)
• internal: codegen related update (e2bebf6)
• internal: codegen related update (213c670)
• internal: codegen related update (2d460ff)
• internal: codegen related update (6087933)
• internal: codegen related update (3e5e21a)
• internal: codegen related update (ee26b2b)
• internal: codegen related update (b3411dd)
• internal: codegen related update (e98bd62)
• internal: codegen related update (94d88c4)
• internal: ignore stainless-internal artifacts (b144935)
• internal: improve pagination tests (94f8bc8)
• internal: minor test script reformatting (e27d068)
• internal: refactor auth by moving concern from base client into client (af7b192)
• internal: update actions/checkout version (212b762)
• internal: update phpstan comments (f0f7ddf)
• readme: remove beta warning now that we're in ga (ca60a4b)
• support jsonl streaming (b350cbc)
• switch from #[Api(optional: true|false)] to #[Required]|#[Optional] for annotations (f938919)
• update examples (eef6daf)
• use $self = clone $this; instead of $obj = clone $this; (1607f76)
• use non-trivial test assertions (c223976)
• use single quote strings (441785c)

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