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This page is the registry of specification features that are currently in the Deprecated state under the feature lifecycle and deprecation policy (SEP-2596). A Deprecated feature remains part of the specification but is scheduled for removal: new implementations SHOULD NOT adopt it, and existing implementations SHOULD migrate before the feature’s earliest removal. The earliest removal marks when a feature becomes eligible for removal; the actual removal is a Core Maintainer decision taken during release preparation and may happen later. This registry is a derived view kept consistent with the per-feature deprecation notices and changelog entries, which are the normative records.

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Deprecated

The HTTP+SSE transport and the includeContext values were already described as deprecated before the lifecycle policy existed; SEP-2596 reclassifies them as Deprecated under its transition provisions.

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Removed

No features have been removed under this policy yet. When a Deprecated feature is removed, its row moves to this section with a link to the changelog entry recording the removal.