diff --git a/apps/desktop/src/App.vue b/apps/desktop/src/App.vue
index e688d2acd8..4e7a9be443 100644
--- a/apps/desktop/src/App.vue
+++ b/apps/desktop/src/App.vue
@@ -102,7 +102,7 @@ import { createTabSwitcherKeyboardController } from "@/lib/tabs/tabSwitcherKeybo
 import { formatShortcutDisplay } from "@/lib/editor/shortcutDisplay";
 import { supportsSqlFileExecution } from "@/lib/database/databaseCapabilities";
 import { classifyAiSqlExecution } from "@/lib/ai/aiSqlExecutionPolicy";
-import { buildAppendedEditorSql } from "@/lib/ai/aiSqlAppend";
+import { buildAppendedEditorSql, buildDeduplicatedAppendedEditorSql } from "@/lib/ai/aiSqlAppend";
 import { assessProductionSql } from "@/lib/database/productionSafety";
 import { normalizeSqlExecutionTarget, sqlExecutionTargetCapabilities } from "@/lib/database/sqlExecutionTargetCapabilities";
 import { executeWithProductionSqlGuard } from "@/lib/database/productionExecutionGuard";
@@ -2241,10 +2241,12 @@ function routeAiRedisCommand(command: string, execute: boolean): boolean {
   return true;
 }
 
-function onAiReplaceSql(sql: string) {
+function onAiAppendSql(sql: string) {
   if (routeAiRedisCommand(sql, false)) return;
   const tabId = ensureQueryTab();
-  queryStore.updateSql(tabId, sql);
+  const currentSql = queryStore.tabs.find((tab) => tab.id === tabId)?.sql ?? "";
+  const appendedSql = buildDeduplicatedAppendedEditorSql(currentSql, sql);
+  if (appendedSql !== currentSql) queryStore.updateSql(tabId, appendedSql);
 }
 
 function runAiGeneratedSql(sql: string) {
@@ -2255,7 +2257,9 @@ function runAiGeneratedSql(sql: string) {
 function onAiExecuteSql(sql: string) {
   if (routeAiRedisCommand(sql, true)) return;
   const tabId = ensureQueryTab();
-  queryStore.updateSql(tabId, buildAppendedEditorSql(activeTab.value?.sql || "", sql));
+  const currentSql = queryStore.tabs.find((tab) => tab.id === tabId)?.sql ?? "";
+  const appendedSql = buildDeduplicatedAppendedEditorSql(currentSql, sql);
+  if (appendedSql !== currentSql) queryStore.updateSql(tabId, appendedSql);
   runAiGeneratedSql(sql);
 }
 
@@ -3225,7 +3229,7 @@ onUnmounted(() => {
                 :tab="activeTab"
                 :connection="activeConnection"
                 :maximized="isAiPanelMaximized"
-                @replace-sql="onAiReplaceSql"
+                @append-sql="onAiAppendSql"
                 @execute-sql="onAiExecuteSql"
                 @temp-run-sql="onAiTempRunSql"
                 @request-auto-execute-sql="onAiRequestAutoExecuteSql"
diff --git a/apps/desktop/src/components/editor/AiAssistant.vue b/apps/desktop/src/components/editor/AiAssistant.vue
index b2c055c9d8..31586cf773 100644
--- a/apps/desktop/src/components/editor/AiAssistant.vue
+++ b/apps/desktop/src/components/editor/AiAssistant.vue
@@ -24,6 +24,7 @@ import {
   GitBranch,
   HelpCircle,
   History,
+  ArrowDownToLine,
   Loader2,
   Maximize2,
   MessageSquarePlus,
@@ -31,7 +32,6 @@ import {
   Pencil,
   Plus,
   RefreshCw,
-  Replace,
   Server,
   ShieldCheck,
   Table2,
@@ -242,7 +242,7 @@ const props = defineProps<{
 }>();
 
 const emit = defineEmits<{
-  replaceSql: [sql: string];
+  appendSql: [sql: string];
   executeSql: [sql: string];
   tempRunSql: [sql: string];
   requestAutoExecuteSql: [sql: string];
@@ -1197,7 +1197,7 @@ function sendProposalReply(positive: boolean) {
   const isWriteConfirmation = isActionableWriteProposalMessage(target);
   if (positive && productionContext.value.active && (target.kind === "writeSqlConfirmation" || looksLikeWriteSqlProposal(target.content))) {
     const sql = extractFirstSqlCodeBlock(target.content);
-    if (sql) emit("replaceSql", sql);
+    if (sql) emit("appendSql", sql);
     toast(t("production.aiReviewRequired"), 5000);
     return;
   }
@@ -3477,7 +3477,7 @@ function applySql(code: string) {
     emit("insertRedisCommand", code);
     return;
   }
-  emit("replaceSql", code);
+  emit("appendSql", code);
 }
 
 function executeSql(code: string) {
@@ -4604,7 +4604,7 @@ async function openExternalUrl(url: string) {
                           <Play class="h-3.5 w-3.5" />
                         </button>
                         <button v-if="!seg.pending && (seg.isSql || isRedisConnection)" class="rounded p-0.5 text-zinc-500 hover:bg-zinc-200 hover:text-zinc-900 dark:text-zinc-400 dark:hover:bg-zinc-700 dark:hover:text-zinc-200" :title="t('ai.apply')" @click="applySql(seg.content)">
-                          <Replace class="h-3.5 w-3.5" />
+                          <ArrowDownToLine class="h-3.5 w-3.5" />
                         </button>
                         <button
                           class="rounded p-0.5 text-zinc-500 hover:bg-zinc-200 hover:text-zinc-900 dark:text-zinc-400 dark:hover:bg-zinc-700 dark:hover:text-zinc-200"
diff --git a/apps/desktop/src/lib/ai/__tests__/aiRedisConsoleRouting.spec.ts b/apps/desktop/src/lib/ai/__tests__/aiRedisConsoleRouting.spec.ts
index 0b63c9a3a7..2c019e9007 100644
--- a/apps/desktop/src/lib/ai/__tests__/aiRedisConsoleRouting.spec.ts
+++ b/apps/desktop/src/lib/ai/__tests__/aiRedisConsoleRouting.spec.ts
@@ -19,14 +19,23 @@ describe("AI Redis console routing", () => {
   });
 
   it("keeps the existing SQL editor and execution behavior for non-Redis connections", () => {
-    expect(aiAssistantSource).toContain('emit("replaceSql", code)');
+    expect(aiAssistantSource).toContain('emit("appendSql", code)');
     expect(aiAssistantSource).toContain('emit("executeSql", code)');
     expect(aiAssistantSource).toContain('emit("tempRunSql", code)');
     expect(appSource).toContain("const tabId = ensureQueryTab();");
+    expect(appSource).toContain("buildDeduplicatedAppendedEditorSql(currentSql, sql)");
     expect(appSource).toContain('buildAppendedEditorSql(activeTab.value?.sql || "", sql)');
     expect(appSource).toContain("const decision = classifyAiSqlExecution(sql, activeConnection.value);");
   });
 
+  it("deduplicates immediate-run editor writes without skipping execution", () => {
+    const handler = appSource.match(/function onAiExecuteSql\(sql: string\) \{[\s\S]*?\n\}/)?.[0] ?? "";
+    expect(handler).toContain("buildDeduplicatedAppendedEditorSql(currentSql, sql)");
+    expect(handler).toContain("if (appendedSql !== currentSql) queryStore.updateSql(tabId, appendedSql);");
+    expect(handler).toContain("runAiGeneratedSql(sql);");
+    expect(handler).not.toContain("buildAppendedEditorSql(");
+  });
+
   it("uses the console safety path and rejects unavailable command input", () => {
     expect(classifyRedisCommandSafety("CONFIG SET requirepass secret")).toBe("blocked");
     expect(classifyRedisCommandSafety("FLUSHDB")).toBe("confirm");
diff --git a/apps/desktop/src/lib/ai/aiSqlAppend.ts b/apps/desktop/src/lib/ai/aiSqlAppend.ts
index 11e01ce95a..5d16c866de 100644
--- a/apps/desktop/src/lib/ai/aiSqlAppend.ts
+++ b/apps/desktop/src/lib/ai/aiSqlAppend.ts
@@ -17,3 +17,30 @@ export function buildAppendedEditorSql(currentEditorSql: string, newSql: string)
 
   return `${currentEditorSql}${separator}${newSql}`;
 }
+
+/**
+ * Append AI-generated SQL unless the exact text already exists as a standalone
+ * editor block. AI appends use a blank line as their block separator, which
+ * avoids treating a matching fragment inside a larger statement as a duplicate.
+ */
+export function buildDeduplicatedAppendedEditorSql(currentEditorSql: string, newSql: string): string {
+  if (!newSql || containsStandaloneSqlBlock(currentEditorSql, newSql)) return currentEditorSql;
+  return buildAppendedEditorSql(currentEditorSql, newSql);
+}
+
+function containsStandaloneSqlBlock(editorSql: string, sql: string): boolean {
+  let from = 0;
+  while (from <= editorSql.length - sql.length) {
+    const index = editorSql.indexOf(sql, from);
+    if (index < 0) return false;
+
+    const before = editorSql.slice(0, index);
+    const after = editorSql.slice(index + sql.length);
+    const startsAtBlockBoundary = index === 0 || /(?:\r?\n){2}$/.test(before);
+    const endsAtBlockBoundary = after.length === 0 || /^(?:\r?\n){2}/.test(after);
+    if (startsAtBlockBoundary && endsAtBlockBoundary) return true;
+
+    from = index + 1;
+  }
+  return false;
+}
diff --git a/packages/app-tests/aiSqlAppend.test.ts b/packages/app-tests/aiSqlAppend.test.ts
index fd6130d247..626bdd77c9 100644
--- a/packages/app-tests/aiSqlAppend.test.ts
+++ b/packages/app-tests/aiSqlAppend.test.ts
@@ -1,6 +1,6 @@
 import { strict as assert } from "node:assert";
 import { test } from "vitest";
-import { buildAppendedEditorSql } from "../../apps/desktop/src/lib/ai/aiSqlAppend.ts";
+import { buildAppendedEditorSql, buildDeduplicatedAppendedEditorSql } from "../../apps/desktop/src/lib/ai/aiSqlAppend.ts";
 
 test("buildAppendedEditorSql returns newSql unchanged when editor is empty", () => {
   assert.equal(buildAppendedEditorSql("", "SELECT 1"), "SELECT 1");
@@ -33,3 +33,34 @@ test("buildAppendedEditorSql preserves whitespace-only editor content", () => {
 test("buildAppendedEditorSql preserves unfinished SQL", () => {
   assert.equal(buildAppendedEditorSql("SELECT * FROM", "SELECT * FROM users"), "SELECT * FROM\n\nSELECT * FROM users");
 });
+
+test("buildDeduplicatedAppendedEditorSql does not append when the editor exactly matches", () => {
+  assert.equal(buildDeduplicatedAppendedEditorSql("SELECT 1", "SELECT 1"), "SELECT 1");
+});
+
+test("buildDeduplicatedAppendedEditorSql does not append a previously appended SQL block", () => {
+  const editorSql = "SELECT 1\n\nSELECT 2";
+  assert.equal(buildDeduplicatedAppendedEditorSql(editorSql, "SELECT 2"), editorSql);
+});
+
+test("buildDeduplicatedAppendedEditorSql detects a matching block in the middle", () => {
+  const editorSql = "SELECT 1\n\nSELECT 2\n\nSELECT 3";
+  assert.equal(buildDeduplicatedAppendedEditorSql(editorSql, "SELECT 2"), editorSql);
+});
+
+test("buildDeduplicatedAppendedEditorSql supports CRLF block separators", () => {
+  const editorSql = "SELECT 1\r\n\r\nSELECT 2";
+  assert.equal(buildDeduplicatedAppendedEditorSql(editorSql, "SELECT 2"), editorSql);
+});
+
+test("buildDeduplicatedAppendedEditorSql does not confuse a matching statement fragment with a standalone block", () => {
+  assert.equal(buildDeduplicatedAppendedEditorSql("WITH value AS (\nSELECT 1\n)", "SELECT 1"), "WITH value AS (\nSELECT 1\n)\n\nSELECT 1");
+});
+
+test("buildDeduplicatedAppendedEditorSql appends SQL that is only a substring of an existing block", () => {
+  assert.equal(buildDeduplicatedAppendedEditorSql("SELECT 10", "SELECT 1"), "SELECT 10\n\nSELECT 1");
+});
+
+test("buildDeduplicatedAppendedEditorSql ignores an empty append", () => {
+  assert.equal(buildDeduplicatedAppendedEditorSql("SELECT 1", ""), "SELECT 1");
+});