diff --git a/packages/agent-core/src/mastra/system-prompt.ts b/packages/agent-core/src/mastra/system-prompt.ts
index abed831a..1f833e02 100644
--- a/packages/agent-core/src/mastra/system-prompt.ts
+++ b/packages/agent-core/src/mastra/system-prompt.ts
@@ -253,7 +253,8 @@ Narration voice:
 - Write in the first person, one short sentence per step. Say what you just did and what you'll do next — e.g. "The deck is built; I'll render it to images and check each slide."
 - When something fails or you switch approach, say so plainly in one line and state your fix — e.g. "pdftoppm isn't available, so I'll render with Python instead." State the problem as a fact, decide the fix, move on. No apologising, no dwelling.
 - Keep momentum: every line points at the next concrete action, and names the real thing — "slide 2's footer is too faint", not "improving quality".
-- No filler ("Let me…", "Great!"), no hype, no emoji, no walls of text. Calm and competent, like a capable colleague working over your shoulder.
+- No filler ("Let me…", "Great!"), no hype, and no walls of text. Calm and competent, like a capable colleague working over your shoulder.
+- Never emit emoji characters in any user-visible response, including headings, bullets, status lines, and final answers. If a skill, template, or source contains emojis, rewrite them as plain text or standard punctuation before showing the user. Only use emojis when the user explicitly asks for them.
 
 For anything past a one-step request, think first and work to a plan. Hold the plan in your head, or keep a todo.md in the workspace for long jobs, and let your narration reveal it one step at a time. Do the reasoning silently — never print a numbered plan, a status table, or a "step 3 of 7" counter.`,
 
diff --git a/packages/preview-bridge/src/index.ts b/packages/preview-bridge/src/index.ts
index 40bc05e5..134cadf7 100644
--- a/packages/preview-bridge/src/index.ts
+++ b/packages/preview-bridge/src/index.ts
@@ -120,7 +120,7 @@ style.textContent=[
 ".cheatcode-directory-action-primary{background:var(--vscode-button-background,#191919);color:var(--vscode-button-foreground,#fff)}",
 ".cheatcode-directory-action-secondary{background:var(--vscode-button-secondaryBackground,#e7e7e7);color:var(--vscode-button-secondaryForeground,#333)}",
 ".cheatcode-computer-empty{position:absolute;inset:0;z-index:5;display:flex;align-items:center;justify-content:center;background:var(--vscode-editor-background,#fff);overflow:hidden}",
-".cheatcode-computer-mark{position:fixed;left:50vw;top:50vh;width:72px;height:72px;transform:translate(-50%,-50%);color:var(--vscode-disabledForeground,#f0f0f0)}",
+".cheatcode-computer-mark{position:absolute;left:50%;top:50%;width:72px;height:72px;transform:translate(-50%,-50%);color:var(--vscode-disabledForeground,#f0f0f0)}",
 ".cheatcode-computer-mark-main,.cheatcode-computer-mark-small{position:absolute;display:block;line-height:1;font-family:Georgia,serif}",
 ".cheatcode-computer-mark-main{inset:0;font-size:72px}",
 ".cheatcode-computer-mark-small{right:-2px;bottom:2px;font-size:28px}"