HTML tags in summary

Here we analyze, which types of HTML tags are allowed inside the summary field.

As the content field, the [summary field(https://www.w3.org/TR/activitystreams-vocabulary/#dfn-summary) is described as

A natural language summarization of the object encoded as HTML.

This is a somewhat petulant table as most Fediverse applications treat the summary field as a plain text content warning.

Sanitizing fields is desired behavior as seen in Section B.10 of ActivityPub.

Examples

Example 1

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/ePmcUtZnV4Y",
  "published": "2025-06-16T09:40:40Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/7FCo8LNtMig",
    "published": "2025-06-16T09:40:40Z",
    "summary": "<b>bold</b>",
    "content": "See summary"
  }
}

Example 2

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/6ZLWSKZDdPo",
  "published": "2025-06-16T09:40:50Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/_NIxk51cWLI",
    "published": "2025-06-16T09:40:50Z",
    "summary": "<strong>strong</strong>",
    "content": "See summary"
  }
}

Example 3

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/ntOc0bMF97I",
  "published": "2025-06-16T09:41:01Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/-b6KI3FrFiE",
    "published": "2025-06-16T09:41:01Z",
    "summary": "<i>italic</i>",
    "content": "See summary"
  }
}

Example 4

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/QdJNJiGiLc0",
  "published": "2025-06-16T09:41:12Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/9A1ystghdjA",
    "published": "2025-06-16T09:41:12Z",
    "summary": "<i>italic with.</i> See <a href=\"https://codeberg.org/helge/funfedidev/issues/142\">Issue 142</a>",
    "content": "See summary"
  }
}

Example 5

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/-LnPrm8sMOg",
  "published": "2025-06-16T09:41:23Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/q5_UlKKal54",
    "published": "2025-06-16T09:41:23Z",
    "summary": "<em>emphasis</em>",
    "content": "See summary"
  }
}

Example 6

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/eQgotQD6m_U",
  "published": "2025-06-16T09:41:33Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/M2LHBnZ_bfI",
    "published": "2025-06-16T09:41:33Z",
    "summary": "<del>old</del><ins>new</ins>",
    "content": "See summary"
  }
}

Example 7

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/S-q2rQFCKrk",
  "published": "2025-06-16T09:41:44Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/5aO2D8vVVfg",
    "published": "2025-06-16T09:41:44Z",
    "summary": "<s>stricken</s>",
    "content": "See summary"
  }
}

Example 8

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/oYhmGTXMQNY",
  "published": "2025-06-16T09:41:55Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/k-Z_eNUWFPs",
    "published": "2025-06-16T09:41:55Z",
    "summary": "<mark>mark</mark>",
    "content": "See summary"
  }
}

Example 9

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/YfuOAbicvmM",
  "published": "2025-06-16T09:42:06Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/Ju_BEhwhrRk",
    "published": "2025-06-16T09:42:06Z",
    "summary": "find <var>x</var> (a variable)",
    "content": "See summary"
  }
}

Example 10

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/nZwBGKX2wo8",
  "published": "2025-06-16T09:42:16Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/St8ZC0XaYm8",
    "published": "2025-06-16T09:42:16Z",
    "summary": "<ol><li>ordered</li></ol>",
    "content": "See summary"
  }
}

Example 11

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/l_WFGYu9ZPY",
  "published": "2025-06-16T09:42:27Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/8wJ4_k-hohg",
    "published": "2025-06-16T09:42:27Z",
    "summary": "<ul><li>unordered</li></ul>",
    "content": "See summary"
  }
}

Example 12

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/mIQ2AtaM8tU",
  "published": "2025-06-16T09:42:38Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/mjrcFKeDKgY",
    "published": "2025-06-16T09:42:38Z",
    "summary": "<h1>h1</h1>",
    "content": "See summary"
  }
}

Example 13

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/qQE5G7zigv0",
  "published": "2025-06-16T09:42:49Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/ZA1leD76OlA",
    "published": "2025-06-16T09:42:49Z",
    "summary": "<h2>h2</h2>",
    "content": "See summary"
  }
}

Example 14

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/pdI8c9m-FcY",
  "published": "2025-06-16T09:42:59Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/jx4AlYoUc1M",
    "published": "2025-06-16T09:42:59Z",
    "summary": "<h3>h3</h3>",
    "content": "See summary"
  }
}

Example 15

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/xYPWzzDnHoU",
  "published": "2025-06-16T09:43:10Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/FjVkOzBV57Y",
    "published": "2025-06-16T09:43:10Z",
    "summary": "<h4>h4</h4>",
    "content": "See summary"
  }
}

Example 16

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/Ax_KudVVTzw",
  "published": "2025-06-16T09:43:21Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/LngxDURbb70",
    "published": "2025-06-16T09:43:21Z",
    "summary": "<h5>h5</h5>",
    "content": "See summary"
  }
}

Example 17

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/3JKlq5rLi98",
  "published": "2025-06-16T09:43:32Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/qV6gl0hxDJU",
    "published": "2025-06-16T09:43:32Z",
    "summary": "<h1>h1</h1><h2>h2</h2>",
    "content": "See summary"
  }
}

Example 18

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/Wo2_8OlGSCI",
  "published": "2025-06-16T09:43:42Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/uQ0jN_TB_B8",
    "published": "2025-06-16T09:43:42Z",
    "summary": "<code>code</code>",
    "content": "See summary"
  }
}

Example 19

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/LntNP8Jylbw",
  "published": "2025-06-16T09:43:53Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/CSsZHFzsB3A",
    "published": "2025-06-16T09:43:53Z",
    "summary": "<pre>pre</pre>",
    "content": "See summary"
  }
}

Example 20

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/cdsQl9p29QA",
  "published": "2025-06-16T09:44:04Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/4H97V2fAPXQ",
    "published": "2025-06-16T09:44:04Z",
    "summary": "<blockquote>blockquote</blockquote>",
    "content": "See summary"
  }
}

Example 21

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/ozw4VU4MD8E",
  "published": "2025-06-16T09:44:15Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/N7oq0lUjxOQ",
    "published": "2025-06-16T09:44:15Z",
    "summary": "line<br/>break",
    "content": "See summary"
  }
}

Example 22

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/m-7846_a9IU",
  "published": "2025-06-16T09:44:25Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/sJ73JllGNHI",
    "published": "2025-06-16T09:44:25Z",
    "summary": "<p>paragraph</p>",
    "content": "See summary"
  }
}

Example 23

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/hgNOEOC68Ds",
  "published": "2025-06-16T09:44:36Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/VDpBdRAaa0k",
    "published": "2025-06-16T09:44:36Z",
    "summary": "<small>small</small>",
    "content": "See summary"
  }
}

Example 24

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/xYYcnx5rM2s",
  "published": "2025-06-16T09:44:47Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/Mh-T7houkgk",
    "published": "2025-06-16T09:44:47Z",
    "summary": "<sup>sup</sup>",
    "content": "See summary"
  }
}

Example 25

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/MBF65jQIJRU",
  "published": "2025-06-16T09:44:58Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/9-buGnzuXpE",
    "published": "2025-06-16T09:44:58Z",
    "summary": "<sub>sub</sub>",
    "content": "See summary"
  }
}

Example 26

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/DYi_zOqlwm4",
  "published": "2025-06-16T09:45:08Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/kkxBmjlUKx8",
    "published": "2025-06-16T09:45:08Z",
    "summary": "<a href='https://funfedi.dev'>funfedi</a>",
    "content": "See summary"
  }
}

Example 27

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/SGul562XUL8",
  "published": "2025-06-16T09:45:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/nkzgsI8TD2E",
    "published": "2025-06-16T09:45:19Z",
    "summary": "<script>alert('hi');</script>",
    "content": "See summary"
  }
}

Example 28

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/Jwth2edFoXQ",
  "published": "2025-06-16T09:45:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/vq9BOUGa-gg",
    "published": "2025-06-16T09:45:30Z",
    "summary": "<img src=\"http://pasture-one-actor/assets/nlnet.png\" alt=\"NLNET Logo\" />",
    "content": "See summary"
  }
}

Example 29

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/GIg8rwhUPBw",
  "published": "2025-06-16T09:45:41Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/GpPP1Ep_jxY",
    "published": "2025-06-16T09:45:41Z",
    "summary": "wbr: Fernstra\u00dfen<wbr />bau<wbr />privat<wbr />finanzierungs<wbr />gesetz",
    "content": "See summary"
  }
}

Example 30

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a92fy09mup5x0003"
  ],
  "id": "http://pasture-one-actor/actor/FPuJAUVlNGI",
  "published": "2025-06-16T09:45:51Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a92fy09mup5x0003"
    ],
    "id": "http://pasture-one-actor/actor/fISJPq0Tg9s",
    "published": "2025-06-16T09:45:51Z",
    "summary": "Audio <audio controls src=\"http://pasture-one-actor/assets/cow_moo.mp3\"></audio>",
    "content": "See summary"
  }
}