release: 0.4.0

[stainless-app]

Automated Release PR

0.4.0 (2026-01-31)

Full Changelog: v0.3.0...v0.4.0

⚠ BREAKING CHANGES

• replace special flag type omittable with just null
• use aliases for phpstan types
• improve identifier renaming for names that clash with builtins

Features

• add idempotency header support (4b941bd)
• add setters to constant parameters (e39f7ab)
• api: api update (b963005)
• api: api update (8ebb1ee)
• api: api update (4e4f842)
• api: api update (859828f)
• api: api update (c7142a7)
• improve identifier renaming for names that clash with builtins (8028859)
• improved phpstan type annotations (1e1c3c6)
• replace special flag type omittable with just null (5294f9f)
• simplify and make the phpstan types more consistent (0735967)
• support unwrapping envelopes (50fbe5d)
• use aliases for phpstan types (e17e879)

Bug Fixes

• a number of serialization errors (4a43323)
• correctly serialize dates (8b350ba)
• support arrays in query param construction (032b424)
• typos in README.md (edeefaf)
• used redirect count instead of retry count in base client (469776a)

Chores

• add git attributes and composer lock file (0ec3ea1)
• internal: add a basic client test (36b8433)
• internal: codegen related update (d600edc)
• internal: codegen related update (597bdf7)
• internal: codegen related update (c26566d)
• internal: codegen related update (b2aba3e)
• internal: codegen related update (5e43726)
• internal: codegen related update (9b7c72f)
• internal: codegen related update (7cbad4c)
• internal: codegen related update (e6f45f4)
• internal: codegen related update (b7631a0)
• internal: codegen related update (6171347)
• internal: ignore stainless-internal artifacts (940bc67)
• internal: minor test script reformatting (50ba7b7)
• internal: refactor auth by moving concern from base client into client (37eeb69)
• internal: update actions/checkout version (f3c6d09)
• internal: update phpstan comments (f6253e9)
• readme: remove beta warning now that we're in ga (dd62d54)

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[stainless-app]

🤖 Release is at https://github.com/moderation-api/sdk-php/releases/tag/v0.4.0 🌻