diff --git a/todo.md b/todo.md
index 6f38155..88c719b 100644
--- a/todo.md
+++ b/todo.md
@@ -14,7 +14,7 @@ detail is settled at its own milestone.
 - [x] **1b — Block node syntaxes** in `spec/flavour.md`: panel, expand/nestedExpand, the media
       family, the pipe-vs-directive table rule and the directive table form, task and decision
       lists, layout, extensions, syncBlock.
-- [ ] **1c — Inline node syntaxes and marks** in `spec/flavour.md`: mention, emoji, status, date,
+- [x] **1c — Inline node syntaxes and marks** in `spec/flavour.md`: mention, emoji, status, date,
       inlineCard, mediaInline; underline, subsup, textColor, border; the spelling for text nodes
       whose whitespace CommonMark cannot hold (literal newlines, leading or trailing spaces) —
       escape-based, never literal, since pipe cells trim and pad. At `mediaInline`, check real