> For the complete documentation index, see [llms.txt](https://cardanoupgrades.docs.intersectmbo.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cardanoupgrades.docs.intersectmbo.org/van-rossem-upgrade/van-rossem-upgrade-communications.md).

# van Rossem upgrade bulletins

Index of all publicly facing updates.

<table><thead><tr><th width="204.73046875">Date</th><th>Title</th></tr></thead><tbody><tr><td><mark style="color:$info;">31st July 2026</mark></td><td>Upgrade Bulletin #27</td></tr><tr><td><mark style="color:$info;">24th July 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2080616602001625597?s=20">Upgrade Bulletin #26</a></td></tr><tr><td><mark style="color:$info;">16th July 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2077737912175567061?s=20">Upgrade Bulletin #25</a></td></tr><tr><td><mark style="color:$info;">9th July 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2075283010992120094?s=20">Upgrade Bulletin #24</a> </td></tr><tr><td><mark style="color:$info;">3rd July 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2073051295343120638?s=20">Upgrade Bulletin #23</a></td></tr><tr><td><mark style="color:$info;">26th June 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2070498163304128703?s=20">Upgrade Bulletin #22</a></td></tr><tr><td><mark style="color:$info;">19th June 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2067930027824427062?s=20">Upgrade Bulletin #21</a></td></tr><tr><td><mark style="color:$info;">16th June 2026</mark></td><td><a href="https://intersectmbo.org/news/cardano-upgrade-van-rossem-hard-fork">Cardano upgrade: van Rossem hard fork</a></td></tr><tr><td><mark style="color:$info;">12th June 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2065366958858502347?s=20">Upgrade Bulletin #20</a></td></tr><tr><td><mark style="color:$info;">5th June 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2062861307502526522?s=20">Upgrade Bulletin #19</a></td></tr><tr><td><mark style="color:$info;">29th May 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2060288997239238810">Upgrade Bulletin #18</a></td></tr><tr><td><mark style="color:$info;">22nd May 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2057817784474574884?s=20">Upgrade Bulletin #17</a></td></tr><tr><td><mark style="color:$info;">17th May 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2056113057781465123?s=20">Upgrade Bulletin #16</a></td></tr><tr><td><mark style="color:$info;">9th May 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2053769746382762091?s=20">Upgrade Bulletin #15</a></td></tr><tr><td><mark style="color:$info;">30th April 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2050273325914485038?s=20">Upgrade Bulletin #14</a></td></tr><tr><td><mark style="color:$info;">23rd April 2026</mark></td><td>Upgrade Bulletin #13 - facing technical challenges on X</td></tr><tr><td><mark style="color:$info;">16th April 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2044723357925704187?s=20">Upgrade Bulletin #12</a></td></tr><tr><td><mark style="color:$info;">9th April 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2042217352373141975?s=20">Upgrade Bulletin #11</a></td></tr><tr><td><mark style="color:$info;">2nd April 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2039724955869253721?s=20">Upgrade Bulletin #10</a></td></tr><tr><td><mark style="color:$info;">26th March 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2037192601636339754?s=20">Upgrade Bulletin #9</a></td></tr><tr><td><mark style="color:$info;">19th March 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2034598520892571701?s=20">Upgrade Bulletin #8</a></td></tr><tr><td><mark style="color:$info;">12th March 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2032053219526865287?s=20">Upgrade Bulletin #7</a></td></tr><tr><td><mark style="color:$info;">5th March 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2029572131286093847?s=20">Upgrade Bulletin #6</a></td></tr><tr><td><mark style="color:$info;">27th February 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2027373122693759296?s=20">Upgrade Bulletin #5</a></td></tr><tr><td><mark style="color:$info;">19th February 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2024546516396859614?s=20">Upgrade Bulletin #4</a></td></tr><tr><td><mark style="color:$info;">12th February 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2021972147892080932?s=20">Upgrade Bulletin #3</a></td></tr><tr><td><mark style="color:$info;">5th February 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2019768528341971008?s=20">Upgrade Bulletin #2</a></td></tr><tr><td><mark style="color:$info;">29th January 2026</mark></td><td><a href="https://x.com/IntersectMBO/status/2016818052835238331">Upgrade Bulletin #1</a></td></tr><tr><td><mark style="color:$info;">4th December 2025</mark></td><td><a href="https://intersectmbo.org/news/proposed-intra-era-hard-fork-to-protocol-version-11">Proposed Intra-Era Hard Fork to Protocol Version 11</a></td></tr><tr><td><mark style="color:$info;">20th November 2025</mark></td><td><a href="https://intersectmbo.org/news/hard-fork-proposal-announced">Hard fork proposal announced</a></td></tr></tbody></table>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://cardanoupgrades.docs.intersectmbo.org/van-rossem-upgrade/van-rossem-upgrade-communications.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
