Release 2026.24 Infrastructure Changes — Unique AI Documentation

Release 2026.24 Infrastructure Changes

Changes on Application environment

Change	Environment Variable Name	Application Default Value (if env variable unset)	Example	Required	Applications	Short Description
Added	`CHAT_BACKEND_API_URL`	(set per environment overlay)	`http://node-chat.chat.svc.cluster.local:8093`	`true`	- `backend-service-configuration`	The route to reach the `backend-service-chat` from `backend-service-configuration`
Added	`SCOPE_MANAGEMENT_API_URL`		`http://node-scope-management.chat.svc.cluster.local:8094`	`true`	- `backend-service-configuration`	Needed for the feature flag service to fetch list of users for user targeting
Removed	`FEATURE_FLAG_REFERENCE_STYLE_2_UN_16900`	-	-	-	- `backend-service-configuration`	-
Removed	`FEATURE_FLAG_REFERENCE_STYLE_REVAMP_UN_16900`	-	-	-	- `backend-service-configuration`	-
Added	`CONFIGURATION_BACKEND_URL`	(none — raises ValueError if unset)	`http://configuration-backend.<namespace>.svc.cluster.local:8095`	`true`	- `ai-service-agentic-ingestion`	In-cluster URL of `backend-service-configuration` used for per-request remote feature flag evaluation. When unset, the service raises a `ValueError` and returns HTTP 500 on every extraction request.
Removed	`FEATURE_FLAG_ENABLE_PDF_CONTENT_EXTRACTION`	-	-	-	- `ai-service-agentic-ingestion`	Moved to `backend-service-configuration`
Added	`FEATURE_FLAG_ENABLE_PDF_CONTENT_EXTRACTION_UN_16985`	`true`	`true` / `false`	`false`	- `backend-service-configuration`	Controls PDF content extraction in `ai-service-agentic-ingestion` per client. Defaults to `true`.
Added	`FEATURE_FLAG_AGENTIC_TABLE_COPY_ACTION_UN_20824`	`false`	`true`	`false`	- `backend-service-configuration`	Enables copy functionality on Agentic Table cells that copies the answer and strips citation references and supporting notes.
Added	`FEATURE_FLAG_ENABLE_HTML_INLINE_IMAGE_EXTRACTION_UN_20936`	`false`	`true`	`false`	- `backend-service-configuration`	Enables extraction of text from inline base64 images during HTML ingestion in `backend-service-ingestion-worker`, per client. For the UI to write the config, `FEATURE_FLAG_ENABLE_MULTI_FILE_IMAGE_CONTENT_EXTRACTION_UN_20936` must also be enabled. (UN-20936)
Added	`FEATURE_FLAG_ENABLE_MULTI_FILE_IMAGE_CONTENT_EXTRACTION_UN_20936`	`false`	`true`	`false`	- `backend-service-configuration`	Enables the multi-file Image Content Extraction UI in `web-app-knowledge-upload` — a single toggle that applies image content extraction to both PDF and HTML files, per company. Backend HTML extraction itself is gated by `FEATURE_FLAG_ENABLE_HTML_INLINE_IMAGE_EXTRACTION_UN_20936`. (UN-20936)
Added	`PROMETHEUS_MULTIPROC_DIR`	(unset — metrics collection not aggregated)	`/tmp/prom_multiproc`	`false`	- `ai-service-assistants-core`	Enables Prometheus multiprocess metrics collection. When set, the entrypoint wipes and recreates the directory before gunicorn starts, and the gunicorn `child_exit` hook flushes per-worker metric files on worker exit. When unset, the feature is a no-op.
Added	`FEATURE_FLAG_ENABLE_USER_MODEL_SELECTION_UN_20804`	`false`	`true`	`false`	- `backend-service-configuration`	Enables user model switching in chat: the admin "Allow users to change the model" space configuration and the in-chat model dropdown that lets users pick from the admin-curated list of models.
Removed	`FEATURE_FLAG_ENABLE_NEW_SPACE_ACCESS_MODAL_UN_17544`	-	-	-	- `backend-service-configuration`	The new space access modal is now GA and enabled for all clients. The old access modal code has been removed.