diff --git a/plex-api-spec.yaml b/plex-api-spec.yaml
index 89c4a704..9d3f3172 100644
--- a/plex-api-spec.yaml
+++ b/plex-api-spec.yaml
@@ -48735,10 +48735,22 @@ paths:
                 type: string
     put:
       operationId: addPlaylistItems
-      summary: Adding to  a Playlist
+      summary: Add Items or an Optimization Job to a Playlist
       tags:
         - Library Playlists
-      description: Adds a generator to a playlist, same parameters as the POST above. With a dumb playlist, this adds the specified items to the playlist. With a smart playlist, passing a new `uri` parameter replaces the rules for the playlist. Returns the playlist.
+      description: |-
+        Adds items or a generator to a playlist. With a dumb playlist, this adds the specified items.
+        With a smart playlist, passing a new `uri` replaces the rules.
+
+        To create an optimized media version, first retrieve the background-processing playlist
+        with `GET /playlists?type=42`, then add an item to that playlist with `Item[type]=42`,
+        an `Item[Location][uri]` that identifies the media, and one of these target configurations:
+
+        - A built-in profile specified by `Item[targetTagID]`.
+        - A custom target specified by `Item[target]`, `Item[Device][profile]`, and
+          `Item[MediaSettings][videoQuality]` together. The remaining media settings describe
+          the custom target. Original quality uses empty strings for video quality, resolution,
+          and maximum bitrate.
       parameters:
         - $ref: "#/components/parameters/accepts"
         - $ref: "#/components/parameters/X-Plex-Client-Identifier"
@@ -48767,6 +48779,100 @@ paths:
           in: query
           schema:
             type: integer
+        - name: Item[type]
+          description: Item type. Use 42 to create an optimized-version job.
+          in: query
+          schema:
+            type: integer
+            enum:
+              - 42
+          x-speakeasy-name-override: itemType
+        - name: Item[title]
+          description: Display title for the optimization job.
+          in: query
+          schema:
+            type: string
+          x-speakeasy-name-override: itemTitle
+        - name: Item[target]
+          description: Custom optimization target name. Required with Item[Device][profile] and Item[MediaSettings][videoQuality] when Item[targetTagID] is not used.
+          in: query
+          schema:
+            type: string
+          x-speakeasy-name-override: itemTarget
+        - name: Item[targetTagID]
+          description: ID of a built-in media-processing target such as Optimized for Mobile. Use this instead of the custom-target parameters.
+          in: query
+          schema:
+            type: integer
+          x-speakeasy-name-override: itemTargetTagId
+        - name: Item[locationID]
+          description: Destination library location ID. Use -1 to store the optimized version with the original media.
+          in: query
+          schema:
+            type: integer
+            minimum: -1
+          x-speakeasy-name-override: itemLocationId
+        - name: Item[Location][uri]
+          description: Plex library URI identifying the media to optimize.
+          in: query
+          schema:
+            type: string
+          x-speakeasy-name-override: itemLocationUri
+        - name: Item[Policy][scope]
+          description: Optimization policy scope. The only valid values are all and count.
+          in: query
+          schema:
+            type: string
+            enum:
+              - all
+              - count
+          x-speakeasy-name-override: itemPolicyScope
+        - name: Item[Policy][value]
+          description: Maximum item count when the policy scope is count.
+          in: query
+          schema:
+            type: integer
+            minimum: 0
+          x-speakeasy-name-override: itemPolicyValue
+        - name: Item[Policy][unwatched]
+          description: Whether to optimize only unwatched items.
+          in: query
+          schema:
+            $ref: "#/components/schemas/BoolInt"
+          x-speakeasy-name-override: itemPolicyUnwatched
+        - name: Item[Device][profile]
+          description: Client device profile used for a custom optimization target. Required with Item[target] and Item[MediaSettings][videoQuality].
+          in: query
+          schema:
+            type: string
+          x-speakeasy-name-override: itemDeviceProfile
+        - name: Item[MediaSettings][videoQuality]
+          description: Video quality index for a custom optimization target, or an empty string for original quality. Required with Item[target] and Item[Device][profile].
+          in: query
+          schema:
+            oneOf:
+              - type: integer
+              - type: string
+                enum:
+                  - ''
+          x-speakeasy-name-override: itemVideoQuality
+        - name: Item[MediaSettings][videoResolution]
+          description: Maximum video resolution for a custom optimization target.
+          in: query
+          schema:
+            type: string
+          x-speakeasy-name-override: itemVideoResolution
+        - name: Item[MediaSettings][maxVideoBitrate]
+          description: Maximum video bitrate in kbps for a custom optimization target, or an empty string for original quality.
+          in: query
+          schema:
+            oneOf:
+              - type: integer
+                minimum: 0
+              - type: string
+                enum:
+                  - ''
+          x-speakeasy-name-override: itemMaxVideoBitrate
       responses:
         '200':
           $ref: "#/components/responses/slash-post-responses-200"