Add writui to the Markdown tool directory

_tools/writui.md

@@ -0,0 +1,85 @@
+---
+title: writui
+category: documents
+description: "writui is a terminal Markdown writing app for macOS and Linux."
+icon: writui-icon.png
+website: https://writui.com/
+syntax:
+  - id: headings
+    available: y
+  - id: paragraphs
+    available: y
+  - id: line-breaks
+    available: p
+    notes: "The editor displays source line breaks, but does not visually distinguish Markdown hard and soft breaks."
+  - id: bold
+    available: y
+  - id: italic
+    available: y
+  - id: blockquotes
+    available: p
+    notes: "The source marker remains visible; wrapped lines align with the quoted text."
+  - id: ordered-lists
+    available: p
+    notes: "List source remains visible; wrapped items align with their text."
+  - id: unordered-lists
+    available: p
+    notes: "List source remains visible; wrapped items align with their text."
+  - id: code
+    available: y
+  - id: horizontal-rules
+    available: p
+    notes: "The Markdown markers are dimmed rather than displayed as a drawn rule."
+  - id: links
+    available: y
+    notes: "Links are underlined and can be opened with Ctrl-click or from the command menu."
+  - id: images
+    available: p
+    notes: "Image links can be opened, but images are not displayed inside the terminal editor."
+  - id: tables
+    available: p
+    notes: "Table syntax is recognized, but the source remains visible instead of becoming a rendered grid."
+  - id: fenced-code-blocks
+    available: y
+    notes: "Code is colored, without language-specific highlighting."
+  - id: syntax-highlighting
+    available: n
+  - id: footnotes
+    available: n
+  - id: heading-ids
+    available: n
+  - id: definition-lists
+    available: n
+  - id: strikethrough
+    available: y
+  - id: task-lists
+    available: p
+    notes: "Task list syntax is recognized; checkboxes remain editable Markdown source."
+  - id: emoji-cp
+    available: y
+  - id: emoji-sc
+    available: n
+  - id: highlight
+    available: n
+  - id: subscript
+    available: n
+  - id: superscript
+    available: n
+  - id: auto-url-linking
+    available: y
+    notes: "Bare web addresses are underlined and can be opened from the editor."
+  - id: disabling-auto-url
+    available: p
+    notes: "A URL inside an inline code span is not automatically linked."
+  - id: html
+    available: n
+    notes: "Raw HTML is preserved in the Markdown source, but not rendered in the editor."
+---
+
+[writui](https://writui.com/) is a free, open-source terminal app for writing Markdown on macOS and Linux. It stores posts in a password-encrypted local vault, saves automatically, and can export posts as `.md` files. It is designed for drafting prose rather than editing Markdown files in place.
+
+The editor keeps the Markdown characters visible while styling supported elements. The table below describes what the editor displays or makes interactive; exported Markdown may be rendered differently by another application.
+
+{% include image.html file="/assets/images/tools/writui-writing.png" alt="A Markdown post open in the writui terminal editor" %}
+
+{% include tool-syntax-table.html %}