diff --git a/format/v2/INLINE_MARKUP.md b/format/v2/INLINE_MARKUP.md
index 05a0c5e..d153a98 100644
--- a/format/v2/INLINE_MARKUP.md
+++ b/format/v2/INLINE_MARKUP.md
@@ -90,7 +90,7 @@ Where canonical output rewrites the string, the row says so.
 | `~x~` | literal | only runs of exactly two tildes delimit |
 | `^x^` | literal | |
 | `&lt;u&gt;` | the text `<u>` | entities are decoded on input; canonical output writes `\<u>` instead |
-| `[t](anytype://object?objectId=X&spaceId=Y)` | an **ordinary link**, param verbatim | a second parameter makes it not-an-object-link. Guessing which half is the id and guessing wrong is unrecoverable, so nothing guesses |
+| `[t](anytype://object?objectId=X&spaceId=Y)` | a **cross-space object link** — an ordinary link, param verbatim | the platform's own two-parameter deep link to an object in another space (`core/block/export/writer.go`); a second parameter makes it not-an-object-link here, and guessing which half is the id and guessing wrong is unrecoverable, so nothing guesses. The API expands a short space id in it to the full one on write |
 
 The delimiter set — `**`, `*`, `~~`, `` ` ``, `[…](…)` — is **closed**. A future
 version adds a mark as a tag, never as new punctuation, which is what makes
diff --git a/format/v2/schema/object.schema.json b/format/v2/schema/object.schema.json
index 69fbf30..f5ba219 100644
--- a/format/v2/schema/object.schema.json
+++ b/format/v2/schema/object.schema.json
@@ -941,7 +941,7 @@
               },
               "text": {
                 "type": "string",
-                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
+                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `[text](anytype://object?objectId=<id>&spaceId=<space_id>)` links to an object in another space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
               }
             }
           }
@@ -970,7 +970,7 @@
               },
               "text": {
                 "type": "string",
-                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
+                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `[text](anytype://object?objectId=<id>&spaceId=<space_id>)` links to an object in another space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
               }
             }
           }
@@ -996,7 +996,7 @@
               },
               "text": {
                 "type": "string",
-                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
+                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `[text](anytype://object?objectId=<id>&spaceId=<space_id>)` links to an object in another space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
               }
             }
           }
@@ -1019,7 +1019,7 @@
               },
               "text": {
                 "type": "string",
-                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
+                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `[text](anytype://object?objectId=<id>&spaceId=<space_id>)` links to an object in another space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
               }
             }
           }
@@ -1045,7 +1045,7 @@
               },
               "text": {
                 "type": "string",
-                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
+                "description": "The block's text, with formatting written inline. There is no marks array and no offsets. The accepted syntax, and nothing else:\n  `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``\n  `[text](https://example.com)` links out\n  `[text](anytype://object?objectId=<id>)` links to an object in this space\n  `[text](anytype://object?objectId=<id>&spaceId=<space_id>)` links to an object in another space\n  `<mention object_id=\"<id>\">text</mention>` is a decorated object reference\n  `<u>underline</u>`, `<font color=\"red\">text</font>`, `<font background=\"yellow\">text</font>`\nEverything else is literal text: no block syntax, no images, no autolinks, no other HTML. `\\n` is a soft line break. Escape a literal `*`, `` ` ``, `[`, `]`, `~`, `<` or `\\` with a backslash."
               }
             }
           }