Previous value: -"Approved, merged, deployed, live_url and indexed, once it is on its way"New value: +"Approved, merged, deployed (this version's deploy serves it), live_url (where it is or will be live: link it only once deployed), expected_at (when a deploy under way should land) and indexed, once it is on its way"

Added value: +{
+  "description": "While the preview builds: how long to wait for it before answering (default 0, most 25)",
+  "maximum": 25,
+  "minimum": 0,
+  "type": "integer"
+}

Added value: +{
+  "description": "Where the draft is, step by step (the same steps the progress notifications name): done, active (under way now), pending or failed",
+  "items": {
+    "properties": {
+      "id": {
+        "type": "string"
+      },
+      "label": {
+        "type": "string"
+      },
+      "state": {
+        "enum": [
+          "done",
+          "active",
+          "pending",
+          "failed"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "label",
+      "state"
+    ],
+    "type": "object"
+  },
+  "type": "array"
+}

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "properties": {
+    "checks": {
+      "description": "The last check run on the draft, each item marked as one the engineer may publish past or one that must pass; null before any",
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "cockpit": {
+      "description": "The writing cockpit: one status, one next step, the to-do cards and any open redline",
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "editing": {
+      "description": "With editing (the draft app's hold): whether an edit is under way",
+      "type": "boolean"
+    },
+    "held": {
+      "description": "With editing: whether the app holds the draft for the engineer's edit",
+      "type": "boolean"
+    },
+    "id": {
+      "type": "string"
+    },
+    "kind": {
+      "enum": [
+        "post",
+        "case-study"
+      ],
+      "type": "string"
+    },
+    "meaning": {
+      "type": "string"
+    },
+    "preview_current": {
+      "description": "False while a save is still being committed or its preview rebuilt",
+      "type": "boolean"
+    },
+    "preview_source": {
+      "description": "Which page the app shows: the published page, the draft's own preview, the live post standing in for a revision's, or none yet",
+      "enum": [
+        "published",
+        "own",
+        "live",
+        null
+      ],
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "preview_url": {
+      "description": "The draft's preview (the live page once published): show it to the engineer",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "progress": {
+      "description": "Approved, merged, deployed, live_url and indexed, once it is on its way",
+      "type": "object"
+    },
+    "publish": {
+      "description": "Whether Publish may run now, and why not",
+      "type": "object"
+    },
+    "state": {
+      "type": "string"
+    },
+    "title": {
+      "type": "string"
+    },
+    "why": {
+      "description": "With editing: why the hold was not taken",
+      "type": "string"
+    }
+  },
+  "required": [
+    "id"
+  ],
+  "type": "object"
+}

Added value: +{
+  "description": "The draft app only, never an agent: true while the engineer has unsaved edits in its Edit tab (takes or renews the app's edit hold), false when they save, discard or leave it (lets go). It changes no text; with it the answer is the hold, not the preview",
+  "type": "boolean"
+}

Added value: +{
+  "description": "The draft app only: its view's own id, with editing",
+  "type": "string"
+}