Fix 1.59 release notes and add st.mermaid_chart, st.skeleton, MarkdownColumn docs (#1498)

* Fix 1.59 release notes and add st.mermaid_chart API docs

- Fix bokeh_chart removal note to reference streamlit-bokeh component
- Remove incorrect stcore metrics config option sentence
- Update submit_mode description based on docstring
- Fix column stats submenu interaction (dropdown icon, not right-click)
- Add st.mermaid_chart as highlight, move submit_mode to notable changes
- Add st.mermaid_chart detail page, tile, menu entry, and screenshot

Co-authored-by: Cursor <cursoragent@cursor.com>

* Add example app source files for st.mermaid_chart and st.skeleton

Co-authored-by: Cursor <cursoragent@cursor.com>

* Add example app source file for MarkdownColumn

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Johannes Rieke <johannes.rieke@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people

content/develop/api-reference/_index.md

@@ -646,6 +646,19 @@ Display a graph using the dagre-d3 library.
 st.graphviz_chart(my_graphviz_spec)
 ```
 
+</RefCard>
+<RefCard href="/develop/api-reference/charts/st.mermaid_chart">
+
+<Image pure alt="screenshot" src="/images/api/mermaid_chart.jpg" />
+
+<h4>Mermaid chart</h4>
+
+Display a Mermaid diagram.
+
+```python
+st.mermaid_chart("graph LR\n  A --> B")
+```
+
 </RefCard>
 </TileContainer>
 

content/develop/api-reference/charts/_index.md

@@ -155,6 +155,19 @@ Display a graph using the dagre-d3 library.
 st.graphviz_chart(my_graphviz_spec)
 ```
 
+</RefCard>
+<RefCard href="/develop/api-reference/charts/st.mermaid_chart">
+
+<Image pure alt="screenshot" src="/images/api/mermaid_chart.jpg" />
+
+<h4>Mermaid chart</h4>
+
+Display a Mermaid diagram.
+
+```python
+st.mermaid_chart("graph LR\n  A --> B")
+```
+
 </RefCard>
 </TileContainer>
 

content/develop/api-reference/charts/mermaid_chart.md

@@ -0,0 +1,8 @@
+---
+title: st.mermaid_chart
+slug: /develop/api-reference/charts/st.mermaid_chart
+description: st.mermaid_chart renders a Mermaid diagram in your app, letting you embed flowcharts, sequence diagrams, and more.
+keywords: st.mermaid_chart, mermaid, diagram, flowchart, sequence diagram, graph, chart
+---
+
+<Autofunction function="streamlit.mermaid_chart" />

content/develop/api-reference/text/_index.md

@@ -157,8 +157,7 @@ Display mathematical expressions formatted as LaTeX.
 st.latex("\int a x^2 \,dx")
 ```
 
-</RefCard>
-<RefCard href="/develop/api-reference/text/st.divider">
+</RefCard><RefCard href="/develop/api-reference/text/st.divider">
 
 <Image pure alt="screenshot" src="/images/api/divider.jpg" />
 

content/develop/quick-references/release-notes/2026.md

@@ -16,14 +16,14 @@ _Release date: July 6, 2026_
 **Highlights**
 
 - ✨ Introducing [`ButtonColumn`](/develop/api-reference/data/st.column_config/st.column_config.buttoncolumn) — a new column type for [`st.dataframe`](/develop/api-reference/data/st.dataframe) and [`st.data_editor`](/develop/api-reference/data/st.data_editor) that renders clickable buttons inside table cells, letting users trigger actions directly from a row ([#14544](https://github.com/streamlit/streamlit/pull/14544), [#7015](https://github.com/streamlit/streamlit/issues/7015)).
-- 📊 [`st.dataframe`](/develop/api-reference/data/st.dataframe) has a new column statistics submenu — right-click any column header to see per-column summary stats ([#14307](https://github.com/streamlit/streamlit/pull/14307), [#13148](https://github.com/streamlit/streamlit/issues/13148)).
+- 📊 [`st.dataframe`](/develop/api-reference/data/st.dataframe) has a new column statistics submenu — click the dropdown icon in any column header to see per-column summary stats ([#14307](https://github.com/streamlit/streamlit/pull/14307), [#13148](https://github.com/streamlit/streamlit/issues/13148)).
 - 🍿 Introducing [`st.skeleton`](/develop/api-reference/status/st.skeleton) — a new element that renders animated loading placeholders, making it easy to give users visual feedback while content is loading ([#15169](https://github.com/streamlit/streamlit/pull/15169), [#8032](https://github.com/streamlit/streamlit/issues/8032)).
-- 🎛 [`st.chat_input`](/develop/api-reference/chat/st.chat_input) has a new `submit_mode` parameter that lets you control when messages are submitted — either on Enter (default) or only when the user explicitly clicks the send button ([#14344](https://github.com/streamlit/streamlit/pull/14344), [#8323](https://github.com/streamlit/streamlit/issues/8323), [#11854](https://github.com/streamlit/streamlit/issues/11854)).
+- 🎨 Introducing [`st.mermaid_chart`](/develop/api-reference/charts/st.mermaid_chart) — render Mermaid diagrams directly in your app, letting you embed flowcharts, sequence diagrams, and more. Mermaid also works from [`st.markdown`](/develop/api-reference/text/st.markdown) ([#14022](https://github.com/streamlit/streamlit/pull/14022), [#10721](https://github.com/streamlit/streamlit/issues/10721)).
 
 **Notable Changes**
 
+- 🎛 [`st.chat_input`](/develop/api-reference/chat/st.chat_input) has a new `submit_mode` parameter that controls widget behavior after the user submits a message, e.g. showing a stop button or disabling the chat input ([#14344](https://github.com/streamlit/streamlit/pull/14344), [#8323](https://github.com/streamlit/streamlit/issues/8323), [#11854](https://github.com/streamlit/streamlit/issues/11854)).
 - 📋 [`st.dataframe`](/develop/api-reference/data/st.dataframe) and [`st.data_editor`](/develop/api-reference/data/st.data_editor) support a new [`MarkdownColumn`](/develop/api-reference/data/st.column_config/st.column_config.markdowncolumn) type in `st.column_config` that renders Markdown text inside table cells ([#13931](https://github.com/streamlit/streamlit/pull/13931), [#10211](https://github.com/streamlit/streamlit/issues/10211)).
-- 🎨 [`st.markdown`](/develop/api-reference/text/st.markdown) now renders Mermaid diagrams, letting you embed flowcharts, sequence diagrams, and more directly in your app ([#14022](https://github.com/streamlit/streamlit/pull/14022), [#10721](https://github.com/streamlit/streamlit/issues/10721)).
 - 🔗 [`st.markdown`](/develop/api-reference/text/st.markdown) has a new `anchors` parameter for adding linkable heading anchors to Markdown content ([#15722](https://github.com/streamlit/streamlit/pull/15722), [#13913](https://github.com/streamlit/streamlit/issues/13913)).
 - 💻 You can now launch Streamlit apps directly with `python app.py` or `uv run app.py` using the new `App.run()` entry point — no more `streamlit run` required ([#15563](https://github.com/streamlit/streamlit/pull/15563), [#9450](https://github.com/streamlit/streamlit/issues/9450), [#11420](https://github.com/streamlit/streamlit/issues/11420)).
 - 🧩 [`st.fragment`](/develop/api-reference/execution-flow/st.fragment) can now write to containers defined outside the fragment. Fragments can update any part of your app — including elements created before the fragment — without triggering a full rerun ([#15623](https://github.com/streamlit/streamlit/pull/15623), [#15620](https://github.com/streamlit/streamlit/pull/15620), [#10481](https://github.com/streamlit/streamlit/issues/10481)).
@@ -37,9 +37,9 @@ _Release date: July 6, 2026_
 - ⌨ You can now look up Streamlit API documentation from the CLI with `streamlit docs <command>` ([#15547](https://github.com/streamlit/streamlit/pull/15547)).
 - 🔐 A new `server.xsrfCookieSameSite` config option lets you customize the `SameSite` attribute of the XSRF cookie for deployments with specific cross-site requirements ([#15634](https://github.com/streamlit/streamlit/pull/15634), [#5793](https://github.com/streamlit/streamlit/issues/5793), [#9397](https://github.com/streamlit/streamlit/issues/9397)).
 - 💡 Streamlit now recommends installing AI coding skills on app startup to improve your development workflow with AI coding assistants ([#15437](https://github.com/streamlit/streamlit/pull/15437), [#15473](https://github.com/streamlit/streamlit/pull/15473)).
-- ⚙ The `/_stcore/metrics` endpoint now reports memory stats in a less detailed (cheaper) form by default. If your monitoring stack relies on the previous granular memory fields, set `server.enableStaticServing` to `true` to restore them ([#15472](https://github.com/streamlit/streamlit/pull/15472)).
+- ⚙ The `/_stcore/metrics` endpoint now reports memory stats in a less detailed (cheaper) form by default ([#15472](https://github.com/streamlit/streamlit/pull/15472)).
 - 👻 The deprecated Snowpark connection type has been removed. Migrate to a supported connection type ([#15784](https://github.com/streamlit/streamlit/pull/15784)).
-- 👻 The deprecated [`st.bokeh_chart`](/develop/api-reference/charts/st.bokeh_chart) command has been removed. Use `st.components.v1.html` to embed Bokeh visualizations instead ([#15636](https://github.com/streamlit/streamlit/pull/15636)).
+- 👻 The deprecated [`st.bokeh_chart`](/develop/api-reference/charts/st.bokeh_chart) command has been removed. Use the [`streamlit-bokeh`](https://github.com/streamlit/streamlit-bokeh) component instead ([#15636](https://github.com/streamlit/streamlit/pull/15636)).
 
 **Other Changes**
 

content/develop/quick-references/release-notes/_index.md

@@ -28,14 +28,14 @@ _Release date: July 6, 2026_
 **Highlights**
 
 - ✨ Introducing [`ButtonColumn`](/develop/api-reference/data/st.column_config/st.column_config.buttoncolumn) — a new column type for [`st.dataframe`](/develop/api-reference/data/st.dataframe) and [`st.data_editor`](/develop/api-reference/data/st.data_editor) that renders clickable buttons inside table cells, letting users trigger actions directly from a row ([#14544](https://github.com/streamlit/streamlit/pull/14544), [#7015](https://github.com/streamlit/streamlit/issues/7015)).
-- 📊 [`st.dataframe`](/develop/api-reference/data/st.dataframe) has a new column statistics submenu — right-click any column header to see per-column summary stats ([#14307](https://github.com/streamlit/streamlit/pull/14307), [#13148](https://github.com/streamlit/streamlit/issues/13148)).
+- 📊 [`st.dataframe`](/develop/api-reference/data/st.dataframe) has a new column statistics submenu — click the dropdown icon in any column header to see per-column summary stats ([#14307](https://github.com/streamlit/streamlit/pull/14307), [#13148](https://github.com/streamlit/streamlit/issues/13148)).
 - 🍿 Introducing [`st.skeleton`](/develop/api-reference/status/st.skeleton) — a new element that renders animated loading placeholders, making it easy to give users visual feedback while content is loading ([#15169](https://github.com/streamlit/streamlit/pull/15169), [#8032](https://github.com/streamlit/streamlit/issues/8032)).
-- 🎛 [`st.chat_input`](/develop/api-reference/chat/st.chat_input) has a new `submit_mode` parameter that lets you control when messages are submitted — either on Enter (default) or only when the user explicitly clicks the send button ([#14344](https://github.com/streamlit/streamlit/pull/14344), [#8323](https://github.com/streamlit/streamlit/issues/8323), [#11854](https://github.com/streamlit/streamlit/issues/11854)).
+- 🎨 Introducing [`st.mermaid_chart`](/develop/api-reference/charts/st.mermaid_chart) — render Mermaid diagrams directly in your app, letting you embed flowcharts, sequence diagrams, and more. Mermaid also works from [`st.markdown`](/develop/api-reference/text/st.markdown) ([#14022](https://github.com/streamlit/streamlit/pull/14022), [#10721](https://github.com/streamlit/streamlit/issues/10721)).
 
 **Notable Changes**
 
+- 🎛 [`st.chat_input`](/develop/api-reference/chat/st.chat_input) has a new `submit_mode` parameter that controls widget behavior after the user submits a message, e.g. showing a stop button or disabling the chat input ([#14344](https://github.com/streamlit/streamlit/pull/14344), [#8323](https://github.com/streamlit/streamlit/issues/8323), [#11854](https://github.com/streamlit/streamlit/issues/11854)).
 - 📋 [`st.dataframe`](/develop/api-reference/data/st.dataframe) and [`st.data_editor`](/develop/api-reference/data/st.data_editor) support a new [`MarkdownColumn`](/develop/api-reference/data/st.column_config/st.column_config.markdowncolumn) type in `st.column_config` that renders Markdown text inside table cells ([#13931](https://github.com/streamlit/streamlit/pull/13931), [#10211](https://github.com/streamlit/streamlit/issues/10211)).
-- 🎨 [`st.markdown`](/develop/api-reference/text/st.markdown) now renders Mermaid diagrams, letting you embed flowcharts, sequence diagrams, and more directly in your app ([#14022](https://github.com/streamlit/streamlit/pull/14022), [#10721](https://github.com/streamlit/streamlit/issues/10721)).
 - 🔗 [`st.markdown`](/develop/api-reference/text/st.markdown) has a new `anchors` parameter for adding linkable heading anchors to Markdown content ([#15722](https://github.com/streamlit/streamlit/pull/15722), [#13913](https://github.com/streamlit/streamlit/issues/13913)).
 - 💻 You can now launch Streamlit apps directly with `python app.py` or `uv run app.py` using the new `App.run()` entry point — no more `streamlit run` required ([#15563](https://github.com/streamlit/streamlit/pull/15563), [#9450](https://github.com/streamlit/streamlit/issues/9450), [#11420](https://github.com/streamlit/streamlit/issues/11420)).
 - 🧩 [`st.fragment`](/develop/api-reference/execution-flow/st.fragment) can now write to containers defined outside the fragment. Fragments can update any part of your app — including elements created before the fragment — without triggering a full rerun ([#15623](https://github.com/streamlit/streamlit/pull/15623), [#15620](https://github.com/streamlit/streamlit/pull/15620), [#10481](https://github.com/streamlit/streamlit/issues/10481)).
@@ -49,9 +49,9 @@ _Release date: July 6, 2026_
 - ⌨ You can now look up Streamlit API documentation from the CLI with `streamlit docs <command>` ([#15547](https://github.com/streamlit/streamlit/pull/15547)).
 - 🔐 A new `server.xsrfCookieSameSite` config option lets you customize the `SameSite` attribute of the XSRF cookie for deployments with specific cross-site requirements ([#15634](https://github.com/streamlit/streamlit/pull/15634), [#5793](https://github.com/streamlit/streamlit/issues/5793), [#9397](https://github.com/streamlit/streamlit/issues/9397)).
 - 💡 Streamlit now recommends installing AI coding skills on app startup to improve your development workflow with AI coding assistants ([#15437](https://github.com/streamlit/streamlit/pull/15437), [#15473](https://github.com/streamlit/streamlit/pull/15473)).
-- ⚙ The `/_stcore/metrics` endpoint now reports memory stats in a less detailed (cheaper) form by default. If your monitoring stack relies on the previous granular memory fields, set `server.enableStaticServing` to `true` to restore them ([#15472](https://github.com/streamlit/streamlit/pull/15472)).
+- ⚙ The `/_stcore/metrics` endpoint now reports memory stats in a less detailed (cheaper) form by default ([#15472](https://github.com/streamlit/streamlit/pull/15472)).
 - 👻 The deprecated Snowpark connection type has been removed. Migrate to a supported connection type ([#15784](https://github.com/streamlit/streamlit/pull/15784)).
-- 👻 The deprecated [`st.bokeh_chart`](/develop/api-reference/charts/st.bokeh_chart) command has been removed. Use `st.components.v1.html` to embed Bokeh visualizations instead ([#15636](https://github.com/streamlit/streamlit/pull/15636)).
+- 👻 The deprecated [`st.bokeh_chart`](/develop/api-reference/charts/st.bokeh_chart) command has been removed. Use the [`streamlit-bokeh`](https://github.com/streamlit/streamlit-bokeh) component instead ([#15636](https://github.com/streamlit/streamlit/pull/15636)).
 
 **Other Changes**
 

content/menu.md

@@ -300,6 +300,8 @@ site_menu:
     visible: false
   - category: Develop / API reference / Chart elements / st.graphviz_chart
     url: /develop/api-reference/charts/st.graphviz_chart
+  - category: Develop / API reference / Chart elements / st.mermaid_chart
+    url: /develop/api-reference/charts/st.mermaid_chart
   - category: Develop / API reference / Chart elements / st.plotly_chart
     url: /develop/api-reference/charts/st.plotly_chart
   - category: Develop / API reference / Chart elements / st.pydeck_chart

public/images/api/mermaid_chart.jpg

@@ -0,0 +1,8 @@
+import streamlit as st
+
+st.mermaid_chart('''
+    graph LR
+        A[Start] --> B{Decision}
+        B -->|Yes| C[OK]
+        B -->|No| D[Cancel]
+''')

python/api-examples-source/charts.mermaid_chart.py

@@ -0,0 +1,24 @@
+import pandas as pd
+import streamlit as st
+
+data_df = pd.DataFrame(
+    {
+        "description": [
+            "# Title\n\nThis is **bold** text",
+            "## Subtitle\n\n- Item 1\n- Item 2",
+            "Regular text with `code`",
+        ],
+    }
+)
+
+st.dataframe(
+    data_df,
+    column_config={
+        "description": st.column_config.MarkdownColumn(
+            "Description",
+            help="Markdown formatted text",
+            width="large",
+        ),
+    },
+    hide_index=True,
+)