- Introduced AuthorityAdvisoryAiOptions and related classes for managing advisory AI configurations, including remote inference options and tenant-specific settings. - Added AuthorityApiLifecycleOptions to control API lifecycle settings, including legacy OAuth endpoint configurations. - Implemented validation and normalization methods for both advisory AI and API lifecycle options to ensure proper configuration. - Created AuthorityNotificationsOptions and its related classes for managing notification settings, including ack tokens, webhooks, and escalation options. - Developed IssuerDirectoryClient and related models for interacting with the issuer directory service, including caching mechanisms and HTTP client configurations. - Added support for dependency injection through ServiceCollectionExtensions for the Issuer Directory Client. - Updated project file to include necessary package references for the new Issuer Directory Client library.
		
			
				
	
	
		
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# Legacy Authority Authentication Endpoints — Deprecation Guidance
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**Announced:** 1 November 2025  
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**Sunset (removal no earlier than):** 1 May 2026
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## Summary
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StellaOps Authority previously exposed OAuth 2.1 endpoints at `/oauth/token`, `/oauth/revoke`, and `/oauth/introspect` to ease migration from early previews. Those aliases are now **deprecated** in favour of the canonical paths (`/token`, `/revoke`, `/introspect`). All responses from the legacy routes include:
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- `Deprecation` — RFC 7231 HTTP-date set to 1 November 2025.  
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- `Sunset` — HTTP-date advertising the planned removal on 1 May 2026.  
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- `Warning` — RFC 7234 `299` warning describing the migration requirement.  
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- `Link` — `rel="sunset"` URI pointing back to this guidance.
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No new features (DPoP nonces, audit upgrades, policy scopes) will ship on the legacy routes. After 1 May 2026 the aliases will return `410 Gone` and be removed in the next major release.
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## Required Actions
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- **Service identities / CI pipelines** – Update token, revocation, and introspection calls to target the canonical `/token`, `/revoke`, and `/introspect` endpoints. Regenerate OpenAPI clients if they relied on the deprecated paths.  
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- **Gateway / proxy rules** – Remove explicit rewrites that target `/oauth/*` so traffic flows directly to the canonical paths.  
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- **Custom SDKs** – Regenerate against the refreshed Authority OpenAPI spec (`/.well-known/openapi`) which marks legacy operations as `deprecated: true`.  
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- **Monitoring** – Alert on the `authority.api.legacy_endpoint` audit event or the `299` Warning header to verify migrations are complete.
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## Timeline & Support
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| Date | Milestone |
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|------|-----------|
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| 1 Nov 2025 | Deprecation headers emitted, documentation published |
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| Jan–Apr 2026 | Observability dashboards highlight remaining usage; support assists with migrations |
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| 1 May 2026 | Legacy routes return HTTP 410 and will be removed in the next major release |
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Questions? Contact the **Authority Core** guild or open a ticket with the **API Governance Guild** referencing AUTH-OAS-63-001.
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