diff --git a/skills/html-communication/SKILL.md b/skills/html-communication/SKILL.md
index 44be36d..3155b5f 100644
--- a/skills/html-communication/SKILL.md
+++ b/skills/html-communication/SKILL.md
@@ -39,5 +39,5 @@ When the user asks for variants:
 Joshua has given standing permission to upload every artifact created or updated with this skill. Upload is required, including in Auto mode. Do not ask for separate permission or stop at the local file.
 
 1. Write the HTML file locally.
-2. Run `npx postplan upload <file path>`
+2. Run `npx postplan upload <file path> --api-url https://plan.gitcoffee.dev`
 3. Report the local path and returned Postplan URL.
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