From 07d5f55abe2df89d36d81b2e00565b482ddb0023 Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Wed, 22 Jul 2026 15:43:20 +0100
Subject: [PATCH] Impact notes for the colour macro alpha suffix idiom and the
 lingo macro

---
 .../5.5.0/#8702 - lingo-currenttiddler.tid            | 11 +++++++++++
 .../5.5.0/#8702 - wikitext-palette-entries.tid        |  4 +++-
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - lingo-currenttiddler.tid

diff --git a/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - lingo-currenttiddler.tid b/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - lingo-currenttiddler.tid
new file mode 100644
index 0000000000..c5af8f9ff7
--- /dev/null
+++ b/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - lingo-currenttiddler.tid	
@@ -0,0 +1,11 @@
+title: $:/changenotes/5.5.0/#8702/impacts/lingo-currenttiddler
+changenote: $:/changenotes/5.5.0/#8702
+created: 20260722160000000
+modified: 20260722160000000
+tags: $:/tags/ImpactNote
+description: The lingo macro no longer changes the current tiddler while rendering a language string
+impact-type: compatibility-break
+
+Before v5.5.0, the <<.var lingo>> macro transcluded the language string tiddler directly, which set the <<.var currentTiddler>> variable to the language tiddler for the duration of the transclusion.
+
+From v5.5.0 onwards, the language string is transcluded as a template, leaving <<.var currentTiddler>> unchanged. Most language strings are plain text and are unaffected. A language string that references <<.var currentTiddler>>, or uses a field reference such as `{{!!caption}}`, now resolves against the tiddler from which <<.var lingo>> was called rather than the language tiddler itself.
diff --git a/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - wikitext-palette-entries.tid b/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - wikitext-palette-entries.tid
index 023bbc2eed..78c4f02d91 100644
--- a/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - wikitext-palette-entries.tid	
+++ b/editions/tw5.com/tiddlers/releasenotes/5.5.0/#8702 - wikitext-palette-entries.tid	
@@ -1,7 +1,7 @@
 title: $:/changenotes/5.5.0/#8702/impacts/wikitext-palette-entries
 changenote: $:/changenotes/5.5.0/#8702
 created: 20250901000000000
-modified: 20260720103000000
+modified: 20260722160000000
 tags: $:/tags/ImpactNote
 description: Palette entries using WikiText other than the `<<colour ...>>` macro will no longer work
 impact-type: compatibility-break
@@ -9,3 +9,5 @@ impact-type: compatibility-break
 Before v5.5.0, TiddlyWiki palette entries were interpreted as WikiText. In practice this was almost always used for the familiar `<<colour ...>>` macro, but any valid WikiText could be used, including widgets and conditionals.
 
 From v5.5.0 onwards, palette entries are treated as filter expressions. Entries using the `<<colour ...>>` macro continue to work unchanged: they are automatically transformed into the equivalent filter expression `[tf.colour[...]]`. However, any other WikiText constructs are not supported and will not function correctly.
+
+In particular, the idiom of appending a hexadecimal alpha value to the macro, as in `<<colour primary>>AA`, no longer works. The equivalent filter expression is `[tf.colour[primary]colour-set-alpha[0.667]]`.