feat: Add roles field to OrganizationMembership models

[ethinallen]

Description

The OrganizationMembership model only exposed role: SlimRole (singular), but the API also returns roles: List[SlimRole] for multiple-role support. The event model (OrganizationMembershipCreatedData) already had this field — this PR adds it to the two remaining models:

• OrganizationMembership — used by list_organization_memberships, get_organization_membership, create_organization_membership, etc.
• UserOrganizationMembershipBaseListData — used by authorization and groups listing endpoints

The field is Optional[List[SlimRole]] (defaults to None), matching the existing pattern in OrganizationMembershipCreatedData. Backward compatible — role is unchanged, and roles gracefully handles absence from older API responses.

Documentation

Does this require changes to the WorkOS Docs? E.g. the API Reference or code snippets need updates.

[ ] Yes

Link to Devin session: https://app.devin.ai/sessions/896e93121dcd42839221cfd4cebfec33
Requested by: @ethinallen

[devin-ai-integration]

Original prompt from drew.emery

SYSTEM:
=== BEGIN THREAD HISTORY (in #docs-and-sdks) ===
Drew Emery (U07PHF0U4P4): 👋 Flagging that our <https://work-os.slack.com/archives/C08T7DR3XJ6/p1781724593834309|python sdk >only includes a singular role rather than returning roles

[Slack unfurl — this is an automatic link preview, not a user message]
Quote of conversation (https://work-os.slack.com/archives/C08T7DR3XJ6/p1781724593834309):
> From David Blackman
> also why doesn't OrganizationMembership event model have roles on it? - specifically in the python SDK at least when I call list_organization_memberships it returns *class* OrganizationMembership: only has role
> Posted on June 17, 2026 at 07:29 PM

RoboHawk (U09V0J0LDEF): <https://app.plain.com/workspace/w_01KEZ48Y1GZPN4PXQ41666E911/thread/th_01KVBGZM7CZEK6NK760ZHGPFQ0/|Related Plain ticket>

<most_recent_message>
Drew Emery (U07PHF0U4P4): @Devin please add roles support to the python sdk
</most_recent_message>
=== END THREAD HISTORY ===

Thread URL: https://work-os.slack.com/archives/C03AX0VHRDX/p1781731662333919?thread_ts=1781731662.333919&amp;cid=C03AX0VHRDX

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[devin-ai-integration]

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[greptile-apps]

Greptile Summary

This PR adds the roles: Optional[List[SlimRole]] field to OrganizationMembership and UserOrganizationMembershipBaseListData, bringing them in line with the already-updated OrganizationMembershipCreatedData model. The implementation pattern (walrus-operator guard in from_dict, conditional serialization in to_dict, Optional default of None) is copied exactly from the existing model, making the change consistent and backward-compatible.

• roles is added to both model dataclasses, the from_dict deserializers, and the to_dict serializers using the same conditional pattern already in OrganizationMembershipCreatedData.
• All relevant JSON fixtures are updated to include roles, and round-trip tests are extended with assert "roles" not in serialized to cover the omit-when-absent path.

Confidence Score: 4/5

The functional changes are correct and consistent with the existing codebase, but both edited files carry # This file is auto-generated by oagen. Do not edit. headers without the required @oagen-ignore-start/@oagen-ignore-end fences around the hand-written additions.

The roles field deserialization and serialization logic is correct and mirrors the already-merged pattern in OrganizationMembershipCreatedData. Tests and fixtures are properly updated. The outstanding concern — that the next oagen regeneration would silently drop the roles additions from both generated files — was raised in a previous review and remains unaddressed in this PR.

src/workos/organization_membership/models/organization_membership.py and src/workos/common/models/user_organization_membership_base_list_data.py — both are oagen-generated files edited without regeneration-safe markers.

Important Files Changed

Filename	Overview
src/workos/organization_membership/models/organization_membership.py	Adds roles: Optional[List[SlimRole]] = None field with correct from_dict/to_dict handling; hand-edited in an oagen-generated file without ignore markers (previously flagged).
src/workos/common/models/user_organization_membership_base_list_data.py	Adds SlimRole import and roles field; same oagen-generated file concern applies; implementation pattern is correct and consistent.
tests/test_models_round_trip.py	Adds assert "roles" not in serialized to the omit-when-absent tests for both models, addressing the previously flagged missing assertion.
tests/fixtures/organization_membership.json	Adds roles: [{"slug": "admin"}] alongside the existing role field — correct for the full round-trip test.
tests/fixtures/user_organization_membership_base_list_data.json	Adds roles: [{"slug": "admin"}] — consistent with the model update; model does not have a singular role field so none is added.
tests/fixtures/list_user_organization_membership.json	Adds roles to the list fixture entry; straightforward and correct.
tests/fixtures/list_user_organization_membership_base_list_data.json	Adds roles to the list fixture entry; correct.
tests/fixtures/user_organization_membership.json	Adds roles alongside role in the user organization membership fixture; correct.

Class Diagram

%%{init: {'theme': 'neutral'}}%%
classDiagram
    class SlimRole {
        +str slug
        +from_dict(data) SlimRole
        +to_dict() Dict
    }

    class OrganizationMembership {
        +str id
        +str user_id
        +str organization_id
        +SlimRole role
        +Optional~List~SlimRole~~ roles
        +Optional~str~ organization_name
        +from_dict(data) OrganizationMembership
        +to_dict() Dict
    }

    class UserOrganizationMembershipBaseListData {
        +str id
        +str user_id
        +str organization_id
        +Optional~List~SlimRole~~ roles
        +Optional~str~ organization_name
        +from_dict(data) UserOrganizationMembershipBaseListData
        +to_dict() Dict
    }

    class OrganizationMembershipCreatedData {
        +str id
        +SlimRole role
        +Optional~List~SlimRole~~ roles
        +from_dict(data) OrganizationMembershipCreatedData
        +to_dict() Dict
    }

    OrganizationMembership --> SlimRole : role (singular)
    OrganizationMembership --> SlimRole : roles (new)
    UserOrganizationMembershipBaseListData --> SlimRole : roles (new)
    OrganizationMembershipCreatedData --> SlimRole : role (singular)
    OrganizationMembershipCreatedData --> SlimRole : roles (existing)

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classDiagram
    class SlimRole {
        +str slug
        +from_dict(data) SlimRole
        +to_dict() Dict
    }

    class OrganizationMembership {
        +str id
        +str user_id
        +str organization_id
        +SlimRole role
        +Optional~List~SlimRole~~ roles
        +Optional~str~ organization_name
        +from_dict(data) OrganizationMembership
        +to_dict() Dict
    }

    class UserOrganizationMembershipBaseListData {
        +str id
        +str user_id
        +str organization_id
        +Optional~List~SlimRole~~ roles
        +Optional~str~ organization_name
        +from_dict(data) UserOrganizationMembershipBaseListData
        +to_dict() Dict
    }

    class OrganizationMembershipCreatedData {
        +str id
        +SlimRole role
        +Optional~List~SlimRole~~ roles
        +from_dict(data) OrganizationMembershipCreatedData
        +to_dict() Dict
    }

    OrganizationMembership --> SlimRole : role (singular)
    OrganizationMembership --> SlimRole : roles (new)
    UserOrganizationMembershipBaseListData --> SlimRole : roles (new)
    OrganizationMembershipCreatedData --> SlimRole : role (singular)
    OrganizationMembershipCreatedData --> SlimRole : roles (existing)

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_{Reviews (2): Last reviewed commit: "Add roles omit-when-absent assertions to..." | Re-trigger Greptile}

[devin-ai-integration]

Acknowledged — these files are auto-generated by oagen and the proper long-term fix is updating the OpenAPI spec so the generator emits roles natively. This PR serves as an immediate fix for the customer-reported gap. The next oagen run against an updated spec should include roles in both models, making these hand-edits redundant.