diff --git a/panel.js b/panel.js
index 4a68d58..bfa418c 100644
--- a/panel.js
+++ b/panel.js
@@ -3890,8 +3890,14 @@ function _renderRegexReuseRuleList(rules = [], emptyText = "无") {
       const flags = [
         rule.promptOnly ? "promptOnly" : "",
         rule.markdownOnly ? "markdownOnly" : "",
+        rule.promptReplaceAsEmpty ? "请求阶段按空字符串替换" : "",
         rule.reason ? `原因: ${rule.reason}` : "",
       ].filter(Boolean);
+      const replaceText = rule.promptReplaceAsEmpty
+        ? `${rule.replaceString ? `<code>${_escHtml(rule.replaceString)}</code> -> ` : ""}<code>(prompt 时为空)</code>`
+        : rule.replaceString
+          ? `<code>${_escHtml(rule.replaceString)}</code>`
+          : "";
       return `
         <div class="bme-debug-row">
           <span class="bme-debug-key">${_escHtml(rule.name || rule.id || "未命名规则")}</span>
@@ -3899,7 +3905,7 @@ function _renderRegexReuseRuleList(rules = [], emptyText = "无") {
         </div>
         <div class="bme-task-note">
           <code>${_escHtml(rule.findRegex || "(空 findRegex)")}</code>
-          ${rule.replaceString ? ` -> <code>${_escHtml(rule.replaceString)}</code>` : ""}
+          ${replaceText ? ` -> ${replaceText}` : ""}
           ${flags.length ? `<br>${_escHtml(flags.join(" · "))}` : ""}
         </div>
       `;
diff --git a/task-regex.js b/task-regex.js
index 361c7ae..fcbe057 100644
--- a/task-regex.js
+++ b/task-regex.js
@@ -154,7 +154,9 @@ function normalizeRule(raw = {}, fallbackSource = "local", index = 0) {
     destinationFlags: {
       prompt: destination
         ? Boolean(destination.prompt)
-        : raw.markdownOnly !== true,
+        : isTavernRule && raw.markdownOnly === true
+          ? true
+          : raw.markdownOnly !== true,
       display: destination
         ? Boolean(destination.display)
         : Boolean(raw.markdownOnly),
@@ -376,11 +378,18 @@ function getPlacementLabels(placement = []) {
 
 function summarizeRule(rule, reason = "") {
   const normalized = rule && typeof rule === "object" ? rule : {};
+  const promptReplaceAsEmpty =
+    Boolean(normalized.markdownOnly) ||
+    isBeautificationReplace(normalized.replaceString);
   return {
     id: String(normalized.id || ""),
     name: String(normalized.scriptName || normalized.id || ""),
     findRegex: String(normalized.findRegex || ""),
     replaceString: String(normalized.replaceString || ""),
+    effectivePromptReplaceString: promptReplaceAsEmpty
+      ? ""
+      : String(normalized.replaceString || ""),
+    promptReplaceAsEmpty,
     sourceType: String(normalized.sourceType || ""),
     promptOnly: Boolean(normalized.promptOnly),
     markdownOnly: Boolean(normalized.markdownOnly),
@@ -629,15 +638,16 @@ function shouldApplyRuleForTaskContext(rule, stage = "") {
     return true;
   }
 
-  if (rule.markdownOnly) {
-    return false;
-  }
-
   const normalizedStage = String(stage || "").trim();
+  const isPromptStage = PROMPT_STAGES.has(normalizedStage);
   const isFinalPromptStage =
     normalizedStage === "finalPrompt" || normalizedStage === "input.finalPrompt";
   const isOutputStage = OUTPUT_STAGES.has(normalizedStage);
 
+  if (rule.markdownOnly) {
+    return isPromptStage;
+  }
+
   if (isFinalPromptStage) {
     return rule.promptOnly === true;
   }
@@ -683,7 +693,10 @@ function applyOneRule(input, rule, stage = "") {
   if (!regex) return { output: input, changed: false, error: "invalid_regex" };
 
   let replacement = rule.replaceString || "";
-  if (PROMPT_STAGES.has(stage) && isBeautificationReplace(replacement)) {
+  if (
+    PROMPT_STAGES.has(stage) &&
+    (rule.markdownOnly || isBeautificationReplace(replacement))
+  ) {
     replacement = "";
   }
 
diff --git a/tests/task-regex.mjs b/tests/task-regex.mjs
index 8bad23c..2a1f010 100644
--- a/tests/task-regex.mjs
+++ b/tests/task-regex.mjs
@@ -443,7 +443,7 @@ try {
           placement: [PLACEMENT.USER_INPUT],
           promptOnly: true,
         }),
-        createTavernRule("markdown-only", "/Alpha/g", "M", {
+        createTavernRule("markdown-only", "/Alpha/g", "<b>M</b>", {
           placement: [PLACEMENT.USER_INPUT],
           markdownOnly: true,
         }),
@@ -475,7 +475,7 @@ try {
       { entries: [] },
       "user",
     ),
-    "Alpha",
+    "",
   );
   assert.equal(
     applyTaskRegex(
@@ -499,6 +499,77 @@ try {
     ),
     "AI Lore",
   );
+  const markdownInspect = inspectTaskRegexReuse(tavernSemanticsSettings, "extract");
+  const markdownRule = markdownInspect.activeRules.find(
+    (rule) => rule.id === "markdown-only",
+  );
+  assert.equal(markdownRule?.promptReplaceAsEmpty, true);
+  assert.equal(markdownRule?.effectivePromptReplaceString, "");
+  const markdownOnlyFinalPromptSettings = buildSettings({
+    sources: {
+      global: true,
+      preset: false,
+      character: false,
+    },
+  });
+  setTestContext({
+    extensionSettings: {
+      regex: [
+        createTavernRule("markdown-final-strip", "/Decor/g", "<span>Decor</span>", {
+          placement: [PLACEMENT.USER_INPUT],
+          markdownOnly: true,
+        }),
+      ],
+      preset_allowed_regex: {},
+      character_allowed_regex: [],
+    },
+  });
+  initializeHostAdapter({});
+  const markdownFinalDebug = { entries: [] };
+  assert.equal(
+    applyTaskRegex(
+      markdownOnlyFinalPromptSettings,
+      "extract",
+      "input.finalPrompt",
+      "Decor",
+      markdownFinalDebug,
+      "user",
+    ),
+    "",
+  );
+  assert.deepEqual(
+    markdownFinalDebug.entries[0].appliedRules.map((item) => item.id),
+    ["markdown-final-strip"],
+  );
+  setTestContext({
+    extensionSettings: {
+      regex: [
+        createTavernRule("user-prompt-only", "/Alpha/g", "A", {
+          placement: [PLACEMENT.USER_INPUT],
+          promptOnly: true,
+        }),
+        createTavernRule("markdown-only", "/Alpha/g", "<b>M</b>", {
+          placement: [PLACEMENT.USER_INPUT],
+          markdownOnly: true,
+        }),
+        createTavernRule("output-only", "/Answer/g", "AI", {
+          placement: [PLACEMENT.AI_OUTPUT],
+        }),
+        createTavernRule("world-info-only", "/Lore/g", "SYS", {
+          placement: [PLACEMENT.WORLD_INFO],
+        }),
+        createTavernRule("recent-user", "/User/g", "U", {
+          placement: [PLACEMENT.USER_INPUT],
+        }),
+        createTavernRule("recent-ai", "/Reply/g", "R", {
+          placement: [PLACEMENT.AI_OUTPUT],
+        }),
+      ],
+      preset_allowed_regex: {},
+      character_allowed_regex: [],
+    },
+  });
+  initializeHostAdapter({});
   assert.equal(
     applyTaskRegex(
       tavernSemanticsSettings,