v6.1.0-beta.1

6.1.0-beta.1 (2026-05-23)

Features

• add webhook URL policy and wholesale feed sender (65f84d2)

v6.0.0-beta.1

6.0.0-beta.1 (2026-05-23)

Features

• testing: make SellerA2AClient event drain configurable (#829) (62515d8)

Bug Fixes

• send AAO directory pagination cursor as cursor (#811) (da91183)

Documentation

• add MIGRATION_v5_to_v6 stub for the 6.0-beta line (#823) (c3837af), closes #802
• types: refresh import-architecture references (closes #807) (#828) (169bc80)

v5.7.0

5.7.0 (2026-05-22)

Features

• adagents: divergence detector + ?include=properties for directory inverse-lookup (#749 Part 3, adcp#4894) (#752) (1281076)
• adagents: fetch_agent_authorizations_from_directory for AAO inverse lookup (#769) (1c4e57d)
• adagents: publisher_domains compact form, revoked_publisher_domains, streaming fetch caps (closes #729) (#753) (352d1bb)
• decisioning: emit AGENT_SUSPENDED / AGENT_BLOCKED dedicated codes (closes #409) (#748) (12f8ffe)
• decisioning: Tier 3 brand-authz dispatch gate (#350 stage 5, closes #350) (#785) (1ad6df9)
• decisioning: wire create_media_buy_store into PlatformHandler dispatch (closes #462) (#773) (062c6f0)
• examples: handle @adcp/sdk@7.10.x storyboard scenarios (closes #782) (#788) (7ef1b1a)
• pick up beta 3 wholesale products and signals (#799) (0deeaeb)
• preview: opt-in v3.1.0-beta.1 client surface (#4761, #4762, #4763) (#747) (35fdd47)
• schemas: patches/ post-process infra + restore #753/#792 hand-edits (#795) (4e6a722)
• signing: BrandAuthorizationResolver (Tier 3, #350 stages 1-3) (#770) (9028a88)
• signing: verifier key_origins check + IDNA-2008 canonicalization (closes #776, #777) (#789) (31354b4)
• translation: list known keys in TranslationMap KeyError (#768) (7545424)
• types: auto-enforce publisher-selector XOR at Pydantic parse time (closes #759) (#761) (e973864)
• validation: validate_publisher_properties_item accepts Pydantic models (#756) (01c6491)

Bug Fixes

• adagents: disable follow_redirects on ads.txt MANAGERDOMAIN fetch (#754) (76a679f)
• adagents: inline-resolution path for publisher_properties selectors + publisher_domains[] fan-out (#750) (659135f)
• adagents: resolve-and-validate gate against DNS-based SSRF (#757, partial) (#760) (969f373)
• allow owned signals discovery without activation (#792) (46ae0c9)
• decisioning: timing-oracle defense on PERMISSION_DENIED branches (#772) (#774) (c23c9d5)
• preserve full sync_accounts request for account stores (#796) (2b7ad01)
• signing: Argus follow-ups on #789 — IDNA + IP literals, Protocol contract, misconfig warnings, diagnostic hygiene (#798) (fcb64fc)

Reverts

• preview: remove opt-in v3.1 preview surface (#747) (#755) (6947870)

Documentation

• agents: behaviour → behavior (Argus smoke test) (#766) (e7c0815)

v5.6.0

5.6.0 (2026-05-19)

Features

• auth: per-instance discovery_tools override for BearerTokenAuth (#743) (76d0673)

Bug Fixes

• types: open Format.assets discriminated union with UnknownFormatAsset fallback arm (issue #742) (#744) (7904f85)
• types: resolve capability sub-models via field annotation, not numbered names (#745) (b63c7e6)

Documentation

• decisioning: document AccountStore.resolve() as the multi-tenant encoding seam (#739) (0b30743)

v5.5.0

5.5.0 (2026-05-14)

Features

• agents: adopt shared .agents/roles/ layout from adcp#4500 (#730) (fe02c17)
• agents: Phase 3 — weekly sync workflow from adcp (#731) (884873a)
• decisioning: PgProposalStore + framework package derivation (#727) (#732) (c41d4a8)

Bug Fixes

• v3-ref-seller: run alembic upgrade head at boot (#421) (#733) (ffa3c8c)

Documentation

• response-extension import path guidance for context-specific schema variants (#644) (61fb835)

v5.4.0

5.4.0 (2026-05-13)

Features

• decisioning: LazyPlatformRouter.proposal_stores= + proposal_store_factory= (#722) (#724) (a65185e)
• decisioning: ProposalCapabilities.auto_commit_on_put_draft (#723) (#725) (5567e2b)
• idempotency: inject 'replayed: true' on cache hit (#714) (#717) (b511e01)
• server: on_startup / on_shutdown hooks on serve(transport='both') (#713) (aca625e)
• types: SchemaVariant marker + mypy plugin for cross-class overrides (#710) (#718) (0b53cc9)

Bug Fixes

• decisioning: async-safe create_adcp_server_from_platform (#700) (#719) (056714f)
• server: Authorization: Bearer always accepted; legacy headers additive (#720) (#721) (dd6503e)
• server: emit WWW-Authenticate on every 401 (RFC 6750 §3) #712 (#715) (ce707d3)

v5.3.0

5.3.0 (2026-05-12)

Features

• adagents: add validate_adagents_structure helper (#708) (ccd1955)
• adagents: ads.txt MANAGERDOMAIN fallback discovery (#704) (#705) (fddea1a)
• buyer-agent-registry: with_caching factory auto-invalidates on mutations (#692) (de65957)
• server: boot validator for webhook_signing.supported capability invariant (#695) (7e9a734)
• testing: add SellerA2AClient for in-process A2A handler testing (#694) (2d1ae2f)
• testing: add SellerTestClient for in-process handler testing (#666) (965eeda)
• types: Sequence[T] on response-only list fields for covariant adoption (#635) (19be8db)

Bug Fixes

• ci: v3 reference seller storyboard job actually asserts on results (#693) (27a5866)
• compat: extract hostname from brand_manifest URLs with paths (#679) (6bb2c26), closes #677
• compat: handle inline BrandManifest object in v2.5 adapters (#685) (edd7d0a)
• compat: warn on non-standard brand_manifest path in inline-object branch (#688) (840e6b3), closes #687
• compat: warn when brand_manifest non-standard path is flattened to domain (#686) (0568d2e)
• server: preserve Starlette lifespan when public_url is callable (#680) (8632847), closes #676

v5.2.0

5.2.0 (2026-05-11)

Features

• client: server_version constructor scaffold (stage 7-lite) (#674) (5c7acb4)
• client: surface structured adcp_error on TaskResult (#675) (fe66335)
• compat: AdapterPair pattern + v2.5 sync_creatives (stage 4) (#665) (0e47dcc)
• compat: server-side shape-based v2.5 detection (stage 6) (#673) (d6210cc)
• compat: v2.5 create_media_buy + update_media_buy adapters (stage 5c) (#669) (4e3473a)
• compat: v2.5 get_products adapter (stage 5b) (#668) (2025520)
• compat: v2.5 list_creative_formats + preview_creative adapters; deprecate spec_compat_hooks (#667) (fec91d6)
• schemas: fetch + bundle v2.5 schemas from pinned upstream SHA (stage 4b1) (#670) (bd6837f)
• server: pre-adapter validation against legacy schema (stage 4b2) (#671) (4ef032b)
• server: route validation by wire adcp_version (stage 3) (#664) (d2ffac7)
• validation: per-version validator loader (stage 2 of versioned validation) (#659) (6311a9a)

v5.1.0

5.1.0 (2026-05-11)

Features

• a2a: per-request agent-card URL resolution via callable public_url (#650) (1b4f3e0)
• server: add spec_compat_hooks() for pre-v3 / pre-4.4 buyer compatibility (#648) (30690e5)
• server: TenantRegistry.as_platform() adapter for serve() integration (#649) (0e396ca)
• testing: forward pre_validation_hooks through build_asgi_app (#655) (2df49c0)

Bug Fixes

• decisioning: wrap pydantic.ValidationError from delegates as INVALID_REQUEST (#656) (976ab4f)

v5.0.0

5.0.0 (2026-05-10)

⚠ BREAKING CHANGES

• types: callers passing affected_packages into a function typed def f(x: list[Package]) will see a mypy error and need to migrate to Sequence[Package]. Runtime behavior is unchanged; the change is annotation-only.
• types: Subclasses that add fields without Field(exclude=True) will now have those fields appear in model_dump() output where they were previously dropped by Pydantic's declared-schema firewall. Audit each subclass and mark internal fields with Field(exclude=True). To restore the prior behavior at a specific call site, pass serialize_as_any=False explicitly.
• webhooks: domain kwarg removed from create_mcp_webhook_payload and WebhookSender.send_mcp. Migrate to protocol (kebab-case string or AdcpProtocol enum value).
• webhooks: create_mcp_webhook_payload returns a Pydantic model, not a dict; task_type is now required.

Features

• a2a: add public_url param to agent card for production deployments (#621) (14d294c)
• server: add TenantRegistry with per-tenant health tracking (#628) (ae687b6)
• server: default MCP streamable-http to stateful with idle eviction (#636) (3173a54)
• server: expose RequestContext.transport and current_transport ContextVar (#627) (20e5d53)
• server: pre-validation request hook for spec-default injection (#614) (#629) (05d4cd8)
• testing: adopter type-checking test suite with zero-ignore contract (#634) (20e496c)
• testing: extend build_asgi_app with full serve-layer kwargs (#626) (8679a95)
• types: default serialize_as_any=True in AdCPBaseModel.model_dump (#639) (3160ace), closes #615
• types: widen extension-point list[X] to Sequence[X] (#624) (#640) (96ccfd4)
• webhooks: create_mcp_webhook_payload returns McpWebhookPayload (#632) (9eb962c)
• webhooks: replace domain kwarg with typed protocol (AdcpProtocol enum) (#637) (fdd4053)

Bug Fixes

• server: register /.well-known/agent.json alias route in create_a2a_server (#613) (2989101)
• server: strip None-valued asset fields from dict-based response builder output (#631) (c02ea84), closes #622
• types: widen canceled Literal[True]=True to Literal[True]|None=None on request types (#643) (120ae3b)

Documentation

• types: document Field(exclude=True) and @model_serializer for nested wire isolation (#630) (4912af9)