diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68b8792f1..31bd1c771 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -129,7 +129,7 @@ jobs:
           test -f dist/index.d.ts || (echo "ERROR: dist/index.d.ts not found!" && exit 1)
 
       - name: Verify dist bundle tests
-        run: bun test src/shared/dist-bundle-bun-globals.test.ts
+        run: bun test src/shared/dist-bundle-bun-globals.test.ts src/shared/dist-bundle-prompt-content.test.ts
 
       - name: Auto-commit schema changes
         if: github.event_name == 'push' && github.ref == 'refs/heads/master'
diff --git a/src/shared/dist-bundle-prompt-content.test.ts b/src/shared/dist-bundle-prompt-content.test.ts
new file mode 100644
index 000000000..ced4a1074
--- /dev/null
+++ b/src/shared/dist-bundle-prompt-content.test.ts
@@ -0,0 +1,103 @@
+/// <reference types="bun-types" />
+
+import { describe, expect, test } from "bun:test"
+
+const DIST_INDEX = "dist/index.js"
+const SKIP_MESSAGE = "[skipped - dist not built]"
+
+const PROMPT_SIGNATURES = [
+  {
+    path: "packages/prompts-core/prompts/ultrawork/default.md",
+    label: "Ultrawork default",
+    signature: "ULTRAWORK MODE ENABLED!",
+  },
+  {
+    path: "packages/prompts-core/prompts/ultrawork/gemini.md",
+    label: "Ultrawork Gemini",
+    signature: "ULTRAWORK MODE ENABLED!",
+  },
+  {
+    path: "packages/prompts-core/prompts/ultrawork/gpt.md",
+    label: "Ultrawork GPT",
+    signature: "ULTRAWORK MODE ENABLED!",
+  },
+  {
+    path: "packages/prompts-core/prompts/atlas/default.md",
+    label: "Atlas default",
+    signature: "You are Atlas - the Master Orchestrator from OhMyOpenCode.",
+  },
+  {
+    path: "packages/prompts-core/prompts/atlas/gemini.md",
+    label: "Atlas Gemini",
+    signature: "Your value is ORCHESTRATION, not coding.",
+  },
+  {
+    path: "packages/prompts-core/prompts/atlas/gpt.md",
+    label: "Atlas GPT",
+    signature: "This prompt is outcome-first. Choose the most efficient path to the outcomes above.",
+  },
+  {
+    path: "packages/prompts-core/prompts/atlas/kimi.md",
+    label: "Atlas Kimi",
+    signature: "Trust the trained prior on the hard 30% (verification reasoning, failure diagnosis, dependency analysis).",
+  },
+  {
+    path: "packages/prompts-core/prompts/atlas/opus-4-7.md",
+    label: "Atlas Opus 4.7",
+    signature: "Opus 4.7 spawns fewer subagents than Opus 4.6 unless told otherwise.",
+  },
+  {
+    path: "packages/prompts-core/prompts/prometheus/default.md",
+    label: "Prometheus default",
+    signature: "YOU ARE A PLANNER. YOU ARE NOT AN IMPLEMENTER. YOU DO NOT WRITE CODE. YOU DO NOT EXECUTE TASKS.",
+  },
+  {
+    path: "packages/prompts-core/prompts/prometheus/gemini.md",
+    label: "Prometheus Gemini",
+    signature: "If you feel the urge to write code or implement something - STOP. That is NOT your job.",
+  },
+  {
+    path: "packages/prompts-core/prompts/prometheus/gpt.md",
+    label: "Prometheus GPT",
+    signature: "YOU ARE A PLANNER. NOT AN IMPLEMENTER. NOT A CODE WRITER.",
+  },
+  {
+    path: "packages/prompts-core/prompts/mode/search.md",
+    label: "Search mode",
+    signature: "MAXIMIZE SEARCH EFFORT. Launch multiple background agents IN PARALLEL:",
+  },
+  {
+    path: "packages/prompts-core/prompts/mode/analyze.md",
+    label: "Analyze mode",
+    signature: "IF COMPLEX - DO NOT STRUGGLE ALONE. Consult specialists:",
+  },
+  {
+    path: "packages/prompts-core/prompts/mode/team.md",
+    label: "Team mode",
+    signature: "Team-mode reference detected. Orchestrate via team_* tools",
+  },
+  {
+    path: "packages/prompts-core/prompts/mode/hyperplan.md",
+    label: "Hyperplan mode",
+    signature: "HYPERPLAN MODE ENABLED!",
+  },
+] as const
+
+describe("dist bundle prompt content", () => {
+  test("#given dist bundle #when scanned #then markdown prompt signatures are inlined", async () => {
+    const distIndex = Bun.file(DIST_INDEX)
+    if (!(await distIndex.exists())) {
+      console.info(SKIP_MESSAGE)
+      return
+    }
+
+    const bundle = await distIndex.text()
+
+    for (const prompt of PROMPT_SIGNATURES) {
+      expect(
+        bundle.includes(prompt.signature),
+        `${prompt.label} prompt content missing from dist/index.js (${prompt.path}): markdown inlining may have regressed`,
+      ).toBe(true)
+    }
+  })
+})