diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 4f10b88..234d810 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -439,10 +439,17 @@ src/openai/responses.js      — sendOpenAIResponse(client, params) API call wra
 Configured via `CHATGPT_MCP_PROVIDER` env var (defaults to `"openai"`):
 
 ```env
-CHATGPT_MCP_PROVIDER=openai   # current default; accepts any string but factory validates at runtime
+CHATGPT_MCP_PROVIDER=openai   # or "manual" for copy-paste workflow
 ```
 
-The factory whitelists `"openai"`. Any unrecognized value throws at provider creation time (not config load time). Null/NaN/falsy values default to `"openai"` for safe fallback.
+Supported provider values:
+
+| Value    | Description                                                    | Requires API key? |
+| -------- | -------------------------------------------------------------- | ----------------- |
+| `openai` | Default — calls ChatGPT via OpenAI API                       | Yes               |
+| `manual` | Copy-paste — wraps prompts in a ready-to-copy format         | No                |
+
+The factory whitelists `"openai"` and `"manual"`. Any unrecognized value throws at provider creation time (not config load time). Null/NaN/falsy values default to `"openai"` for safe fallback.
 
 ### OpenAI-specific Environment Variables
 
@@ -453,7 +460,7 @@ OPENAI_TEMPERATURE=0.2
 OPENAI_MAX_OUTPUT_TOKENS=2000
 ```
 
-The provider pattern makes it straightforward to add other providers (Ollama, Anthropic) — implement the `send(input, config)` interface and register it in the factory's whitelist.
+The provider pattern makes it straightforward to add other providers (Ollama, Anthropic, custom) — implement the `send(request, config)` interface and register it in the factory's whitelist.
 
 ---
 
diff --git a/README.md b/README.md
index 3141ec6..b05eb40 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,16 @@ OpenAI Provider → OpenAI Responses API
 Advisory Response
 ```
 
-The provider layer is configurable via `CHATGPT_MCP_PROVIDER` env var. Currently only `"openai"` is supported, but the factory pattern enables future providers without touching tool handlers.
+The provider layer is configurable via `CHATGPT_MCP_PROVIDER` env var. Two providers are available:
+
+| Value    | Description                                                    | Use case                                    |
+| -------- | -------------------------------------------------------------- | ------------------------------------------- |
+| `openai` | Default — calls ChatGPT via OpenAI API                       | Automated second-opinion queries            |
+| `manual` | Copy-paste — wraps prompts in a ready-to-copy format         | Manual ChatGPT Web/Business as advisor      |
+
+For the **manual** provider, set `CHATGPT_MCP_PROVIDER=manual`. Each tool call returns a copy-ready prompt block you can paste into ChatGPT Web or ChatGPT Business. This turns Claude Code into an orchestrator: it builds the perfect prompt and formats it for you to hand off to ChatGPT as a second-opinion advisor — all without API calls, quotas, or cost.
+
+The factory pattern enables future providers (Ollama, Anthropic, custom) without touching tool handlers.
 
 All responses are advisory only.
 
diff --git a/src/providers/factory.js b/src/providers/factory.js
index f666f26..cb6bfe4 100644
--- a/src/providers/factory.js
+++ b/src/providers/factory.js
@@ -2,15 +2,17 @@
 // Returns a chat provider based on config value CHATGPT_MCP_PROVIDER.
 
 import { openaiProvider } from "./openai.js";
+import { manualExportProvider } from "./manual-export.js";
 
-const SUPPORTED_PROVIDERS = new Set(["openai"]);
+const SUPPORTED_PROVIDERS = new Set(["openai", "manual"]);
 
 /**
  * Create a chat provider from configuration.
  * Defaults to OpenAI if no provider is specified or value is invalid.
  * @param {object} config - Loaded config object (must contain openaiApiKey).
  * @param {string} config.chatgptMcpProvider - Provider name (default: "openai").
- * @returns {{ send: (input: object, cfg: object) => Promise<{ content: string }> }} Chat provider.
+ * @returns {{ send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }} Chat provider.
+ *   ProviderRequest = { prompt?: string, input?: object }
  */
 export function createChatProvider(config) {
   const providerName = config?.chatgptMcpProvider || "openai";
@@ -24,6 +26,8 @@ export function createChatProvider(config) {
   switch (providerName) {
     case "openai":
       return openaiProvider;
+    case "manual":
+      return manualExportProvider;
     default:
       // Should not reach here because of the set check above.
       throw new Error(`Unknown provider "${providerName}".`);
diff --git a/src/providers/manual-export.js b/src/providers/manual-export.js
new file mode 100644
index 0000000..3ef56a5
--- /dev/null
+++ b/src/providers/manual-export.js
@@ -0,0 +1,104 @@
+// Manual Export chat provider adapter.
+// Wraps the pre-built prompt into a copy-ready format for manual
+// use in ChatGPT Web, ChatGPT Business, or Claude Code.
+
+/**
+ * Detect which MCP tool produced this prompt from available input fields.
+ * Uses heuristic field detection — best-effort when only { prompt } is present.
+ * @param {object} request - ProviderRequest with optional { input } field.
+ * @returns {string} Lowercase tool name (e.g., "ask_chatgpt", "review_plan").
+ */
+function detectToolName(request) {
+  const input = request?.input;
+
+  if (!input) return "unknown";
+
+  if (input.logs) return "debug_issue";
+  if (input.relevantFiles && input.relevantFiles.some(f => f.path)) return "review_code";
+  if (input.context?.toString().toLowerCase().includes("architecture")) return "architecture_review";
+
+  // Distinguish review_plan from ask_chatgpt: review_plan typically has a projectSummary or taskSummary
+  if (input.projectSummary || input.taskSummary) return "review_plan";
+
+  return "ask_chatgpt";
+}
+
+/**
+ * Format prompt output with user instructions for manual copy/paste.
+ * @param {string} prompt - The pre-built prompt from the prompt builder.
+ * @param {string} toolName - Detected or default tool name.
+ * @returns {string} Formatted manual export content.
+ */
+function formatManualExport(prompt, toolName) {
+  const length = prompt.length.toLocaleString();
+  const lines = [
+    "═══════════════════════════════════════════════════",
+    `MANUAL EXPORT — ${toolName}`,
+  ];
+
+  if (prompt.length > 30_000) {
+    lines.push("⚠️ NOTE: Prompt is ~" + prompt.length.toLocaleString() + " characters — may approach ChatGPT context limits.");
+  }
+
+  lines.push("");
+  lines.push("📋 COPY THIS PROMPT INTO ChatGPT WEB / BUSINESS:");
+  lines.push("");
+  lines.push("┌───────────────────────────────────────────────────┐");
+
+  // The prompt itself — displayed as-is for accurate copy/paste
+  const promptLines = prompt.split("\n");
+  for (const pline of promptLines) {
+    lines.push("│ " + pline);
+  }
+
+  lines.push("└───────────────────────────────────────────────────┘");
+  lines.push("");
+  lines.push("📝 INSTRUCTIONS:");
+  lines.push("1. Open https://chat.openai.com (or your ChatGPT Business URL)");
+  lines.push("2. Paste the prompt above into the input box");
+  lines.push("3. Click Send");
+  lines.push("4. Review ChatGPT's second-opinion response");
+  lines.push("5. Compare with Claude Code's analysis — use both perspectives");
+  lines.push("");
+  lines.push("📊 METADATA:");
+  lines.push(`Tool: ${toolName}`);
+  lines.push("Provider: Manual Export (no API calls)");
+  lines.push(`Prompt Length: ${length} characters`);
+  lines.push("");
+  lines.push("═══════════════════════════════════════════════════");
+  lines.push("This is advisory output only. Claude Code remains the executor.");
+  lines.push("═══════════════════════════════════════════════════");
+
+  return lines.join("\n");
+}
+
+/**
+ * Chat provider that wraps the pre-built prompt for manual copy/paste
+ * into ChatGPT Web, ChatGPT Business, or Claude Code.
+ * Implements { send(request, config) => Promise<{ content: string }> }.
+ */
+export const manualExportProvider = {
+  /**
+   * @param {{ prompt?: string, input?: object }} request - ProviderRequest with pre-built prompt.
+   * @param {object} _config - Config (unused — Manual Export is stateless).
+   * @returns {Promise<{ content: string }>} Copy-ready prompt output.
+   */
+  async send(request, _config) {
+    const prompt = request?.prompt || "";
+
+    if (!prompt) {
+      return {
+        content: [
+          "⚠️ Manual Export Provider received no prompt to export.",
+          "",
+          "This indicates the handler did not pass the built prompt",
+          "in the provider request. Please check your handler",
+          "implementation and ensure reviewRequest includes { prompt }.",
+        ].join("\n"),
+      };
+    }
+
+    const toolName = detectToolName(request);
+    return { content: formatManualExport(prompt, toolName) };
+  },
+};
diff --git a/src/providers/openai.js b/src/providers/openai.js
index 6a5d3e1..45a9008 100644
--- a/src/providers/openai.js
+++ b/src/providers/openai.js
@@ -10,7 +10,7 @@ import { sendOpenAIResponse } from "../openai/responses.js";
  */
 export const openaiProvider = {
   /**
-   * @param {object} input - validated tool input (post-budget check).
+   * @param {{ prompt?: string, input?: object }} request - ProviderRequest (prompt is unused by OpenAI provider).
    * @param {object} config - full config from loadConfig().
    * @returns {Promise<{ content: string }>}
    */
diff --git a/src/tools/architecture-review.js b/src/tools/architecture-review.js
index 960be6c..6c57aa1 100644
--- a/src/tools/architecture-review.js
+++ b/src/tools/architecture-review.js
@@ -15,7 +15,8 @@ import { buildArchitectureReviewPrompt } from "../prompts/architecture-review.js
  *   Raw tool input per ARCHITECTURE.md §7 schema.
  * @param {{
  *   loadConfig: () => object,
- *   createProvider: (config: object) => { send: (input: object, cfg: object) => Promise<{ content: string }> }
+ *   createProvider: (config: object) => { send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }
+ *     ProviderRequest = { prompt?: string, input?: object }
  * }} deps
  *   Injected external dependencies.
  * @returns {Promise<{ ok: true, answer: string, warnings: string[] } | { ok: false, error: string, warnings: string[] }>}
@@ -57,11 +58,15 @@ export async function handleArchitectureReview(input, deps) {
     return { ok: false, error: String(err), warnings: [] };
   }
 
+  // --- 5b. Package shared data for provider ---
+
+  const reviewRequest = { prompt: promptMessages, input: budget.input };
+
   // --- 6. Send via provider ---
 
   let aiResult;
   try {
-    aiResult = await provider.send(budget.input, config);
+    aiResult = await provider.send(reviewRequest, config);
   } catch (err) {
     return { ok: false, error: String(err), warnings: [] };
   }
diff --git a/src/tools/ask-chatgpt.js b/src/tools/ask-chatgpt.js
index c05d0ab..439c72c 100644
--- a/src/tools/ask-chatgpt.js
+++ b/src/tools/ask-chatgpt.js
@@ -15,7 +15,8 @@ import { buildAskChatGptPrompt } from "../prompts/ask-chatgpt.js";
  *   Raw tool input per ARCHITECTURE.md §7 schema.
  * @param {{
  *   loadConfig: () => object,
- *   createProvider: (config: object) => { send: (input: object, cfg: object) => Promise<{ content: string }> }
+ *   createProvider: (config: object) => { send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }
+ *     ProviderRequest = { prompt?: string, input?: object }
  * }} deps
  *   Injected external dependencies.
  * @returns {Promise<{ ok: true, answer: string, warnings: string[] } | { ok: false, error: string, warnings: string[] }>}
@@ -57,11 +58,15 @@ export async function handleAskChatGpt(input, deps) {
     return { ok: false, error: String(err), warnings: [] };
   }
 
+  // --- 5b. Package shared data for provider ---
+
+  const reviewRequest = { prompt: promptMessages, input: budget.input };
+
   // --- 6. Send via provider ---
 
   let aiResult;
   try {
-    aiResult = await provider.send(budget.input, config);
+    aiResult = await provider.send(reviewRequest, config);
 
   } catch (err) {
     return { ok: false, error: String(err), warnings: [] };
diff --git a/src/tools/debug-issue.js b/src/tools/debug-issue.js
index fda9ab4..4795689 100644
--- a/src/tools/debug-issue.js
+++ b/src/tools/debug-issue.js
@@ -15,7 +15,8 @@ import { buildDebugIssuePrompt } from "../prompts/debug-issue.js";
  *   Raw tool input per ARCHITECTURE.md §7 schema.
  * @param {{
  *   loadConfig: () => object,
- *   createProvider: (config: object) => { send: (input: object, cfg: object) => Promise<{ content: string }> }
+ *   createProvider: (config: object) => { send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }
+ *     ProviderRequest = { prompt?: string, input?: object }
  * }} deps
  *   Injected external dependencies.
  * @returns {Promise<{ ok: true, answer: string, warnings: string[] } | { ok: false, error: string, warnings: string[] }>}
@@ -57,11 +58,15 @@ export async function handleDebugIssue(input, deps) {
     return { ok: false, error: String(err), warnings: [] };
   }
 
+  // --- 5b. Package shared data for provider ---
+
+  const reviewRequest = { prompt: promptMessages, input: budget.input };
+
   // --- 6. Send via provider ---
 
   let aiResult;
   try {
-    aiResult = await provider.send(budget.input, config);
+    aiResult = await provider.send(reviewRequest, config);
   } catch (err) {
     return { ok: false, error: String(err), warnings: [] };
   }
diff --git a/src/tools/review-code.js b/src/tools/review-code.js
index 69f4185..ccd3101 100644
--- a/src/tools/review-code.js
+++ b/src/tools/review-code.js
@@ -15,7 +15,8 @@ import { buildReviewCodePrompt } from "../prompts/review-code.js";
  *   Raw tool input per ARCHITECTURE.md §7 schema.
  * @param {{
  *   loadConfig: () => object,
- *   createProvider: (config: object) => { send: (input: object, cfg: object) => Promise<{ content: string }> }
+ *   createProvider: (config: object) => { send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }
+ *     ProviderRequest = { prompt?: string, input?: object }
  * }} deps
  *   Injected external dependencies.
  * @returns {Promise<{ ok: true, answer: string, warnings: string[] } | { ok: false, error: string, warnings: string[] }>}
@@ -57,11 +58,15 @@ export async function handleReviewCode(input, deps) {
     return { ok: false, error: String(err), warnings: [] };
   }
 
+  // --- 5b. Package shared data for provider ---
+
+  const reviewRequest = { prompt: promptMessages, input: budget.input };
+
   // --- 6. Send via provider ---
 
   let aiResult;
   try {
-    aiResult = await provider.send(budget.input, config);
+    aiResult = await provider.send(reviewRequest, config);
   } catch (err) {
     return { ok: false, error: String(err), warnings: [] };
   }
diff --git a/src/tools/review-plan.js b/src/tools/review-plan.js
index 3776424..fa2347d 100644
--- a/src/tools/review-plan.js
+++ b/src/tools/review-plan.js
@@ -15,7 +15,8 @@ import { buildReviewPlanPrompt } from "../prompts/review-plan.js";
  *   Raw tool input per ARCHITECTURE.md §7 schema.
  * @param {{
  *   loadConfig: () => object,
- *   createProvider: (config: object) => { send: (input: object, cfg: object) => Promise<{ content: string }> }
+ *   createProvider: (config: object) => { send: (request: ProviderRequest, cfg: object) => Promise<{ content: string }> }
+ *     ProviderRequest = { prompt?: string, input?: object }
  * }} deps
  *   Injected external dependencies.
  * @returns {Promise<{ ok: true, answer: string, warnings: string[] } | { ok: false, error: string, warnings: string[] }>}
@@ -57,11 +58,15 @@ export async function handleReviewPlan(input, deps) {
     return { ok: false, error: String(err), warnings: [] };
   }
 
+  // --- 5b. Package shared data for provider ---
+
+  const reviewRequest = { prompt: promptMessages, input: budget.input };
+
   // --- 6. Send via provider ---
 
   let aiResult;
   try {
-    aiResult = await provider.send(budget.input, config);
+    aiResult = await provider.send(reviewRequest, config);
 
   } catch (err) {
     return { ok: false, error: String(err), warnings: [] };
diff --git a/test/providers/factory.test.js b/test/providers/factory.test.js
index ed7b79f..8be2312 100644
--- a/test/providers/factory.test.js
+++ b/test/providers/factory.test.js
@@ -1,5 +1,6 @@
 import { describe, it, expect, vi } from "vitest";
 import { createChatProvider, openaiProvider } from "../../src/providers/factory.js";
+import { manualExportProvider } from "../../src/providers/manual-export.js";
 
 function mockConfig(provider) {
   const cfg = { chatgptMcpProvider: provider };
@@ -195,3 +196,66 @@ describe("repeatability", () => {
     expect(p1).toBe(p2);
   });
 });
+
+// --- Manual provider ---
+
+describe("manual provider", () => {
+  it("supports manual provider via createChatProvider", () => {
+    const provider = createChatProvider({ chatgptMcpProvider: "manual" });
+    expect(provider.send).toBeDefined();
+  });
+
+  it("returns the same singleton instance for repeated calls with 'manual'", () => {
+    const p1 = createChatProvider({ chatgptMcpProvider: "manual" });
+    const p2 = createChatProvider({ chatgptMcpProvider: "manual" });
+    expect(p1).toBe(p2);
+  });
+
+  it("is different from openai provider", () => {
+    const manualP = createChatProvider({ chatgptMcpProvider: "manual" });
+    expect(manualP).not.toBe(openaiProvider);
+  });
+
+  it("can detect manual as a supported provider (not throw)", () => {
+    const provider = createChatProvider({ chatgptMcpProvider: "manual" });
+    expect(provider.send).toBeDefined();
+  });
+
+  it("manual provider send returns { content: string } shape", async () => {
+    const provider = createChatProvider({ chatgptMcpProvider: "manual" });
+    const result = await provider.send(
+      { prompt: "test prompt from manual env", input: { question: "hi" } },
+      {},
+    );
+    expect(result).toHaveProperty("content");
+    expect(typeof result.content).toBe("string");
+  });
+
+  it("manual provider output contains MANUAL EXPORT marker", async () => {
+    const provider = createChatProvider({ chatgptMcpProvider: "manual" });
+    const result = await provider.send({ prompt: "test", input: {} }, {});
+    expect(result.content).toContain("MANUAL EXPORT");
+  });
+
+  it("manual provider output contains COPY box delimiters", async () => {
+    const provider = createChatProvider({ chatgptMcpProvider: "manual" });
+    const result = await provider.send({ prompt: "test", input: {} }, {});
+    expect(result.content).toContain("┌");
+    expect(result.content).toContain("┐");
+    expect(result.content).toContain("┘");
+  });
+
+  it("can be switched from openai to manual and back", () => {
+    const p1 = createChatProvider({ chatgptMcpProvider: "openai" });
+    const p2 = createChatProvider({ chatgptMcpProvider: "manual" });
+    const p3 = createChatProvider({ chatgptMcpProvider: "openai" });
+    expect(p1).toBe(openaiProvider);
+    expect(p2).not.toBe(openaiProvider);
+    expect(p3).toBe(openaiProvider);
+  });
+
+  it("manual provider is not the same as openaiProvider singleton", () => {
+    const manualP = createChatProvider({ chatgptMcpProvider: "manual" });
+    expect(manualExportProvider).toBe(manualP);
+  });
+});
diff --git a/test/providers/manual-export.test.js b/test/providers/manual-export.test.js
new file mode 100644
index 0000000..f149875
--- /dev/null
+++ b/test/providers/manual-export.test.js
@@ -0,0 +1,506 @@
+import { describe, it, expect } from "vitest";
+import { manualExportProvider } from "../../src/providers/manual-export.js";
+
+// --- Basic structure ---
+
+describe("basic structure", () => {
+  it("exports a provider with send method", () => {
+    expect(manualExportProvider).toBeDefined();
+    expect(typeof manualExportProvider.send).toBe("function");
+  });
+
+  it("returns { content: string } shape on success", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test prompt" },
+      {},
+    );
+    expect(result).toHaveProperty("content");
+    expect(typeof result.content).toBe("string");
+  });
+
+  it("returns non-empty content for valid prompt", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test prompt" },
+      {},
+    );
+    expect(result.content.length).toBeGreaterThan(0);
+  });
+
+  it("is deterministic — same input produces same output", async () => {
+    const input = { prompt: "deterministic test", input: { question: "hi" } };
+    const r1 = await manualExportProvider.send(input, {});
+    const r2 = await manualExportProvider.send(input, {});
+    expect(r1.content).toBe(r2.content);
+  });
+
+  it("does not modify the request object", async () => {
+    const req = { prompt: "test", input: { question: "hi" } };
+    const original = JSON.stringify(req);
+    await manualExportProvider.send(req, {});
+    expect(JSON.stringify(req)).toBe(original);
+  });
+
+  it("does not modify the config object", async () => {
+    const config = { openaiApiKey: "sk-test" };
+    await manualExportProvider.send({ prompt: "test" }, config);
+    expect(config.openaiApiKey).toBe("sk-test");
+  });
+});
+
+// --- Copy-ready structure ---
+
+describe("copy-ready structure", () => {
+  it("includes MANUAL EXPORT header with tool name", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("MANUAL EXPORT");
+  });
+
+  it("includes COPY box with top-left corner delimiters (┌)", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("┌");
+  });
+
+  it("includes COPY box with bottom-right corner delimiters (┐ and ┘)", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("┐");
+    expect(result.content).toContain("└");
+    expect(result.content).toContain("┘");
+  });
+
+  it("includes instructions section with numbered steps", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("📝 INSTRUCTIONS:");
+    expect(result.content).toContain("1.");
+    expect(result.content).toContain("2.");
+    expect(result.content).toContain("3.");
+  });
+
+  it("includes metadata section", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("📊 METADATA:");
+  });
+
+  it("includes provider info in metadata", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("Manual Export");
+  });
+
+  it("includes tool name in metadata", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toMatch(/Tool: \w+/);
+  });
+
+  it("includes prompt length in metadata with formatted thousands separator", async () => {
+    const longPrompt = "x".repeat(12345);
+    const result = await manualExportProvider.send(
+      { prompt: longPrompt, input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("Prompt Length:");
+    expect(result.content).toContain("12,345 characters");
+  });
+
+  it("includes advisory footer", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("advisory output only");
+  });
+
+  it("wraps each line of prompt in box with │ delimiter", async () => {
+    const multiLine = "line one\nline two\nline three";
+    const result = await manualExportProvider.send(
+      { prompt: multiLine, input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("│ line one");
+    expect(result.content).toContain("│ line two");
+    expect(result.content).toContain("│ line three");
+  });
+});
+
+// --- Per-tool detection ---
+
+describe("tool name detection", () => {
+  it("detects debug_issue when input has logs", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { logs: "Error: boom" } },
+      {},
+    );
+    expect(result.content).toContain("Tool: debug_issue");
+  });
+
+  it("detects review_code when input has relevantFiles with paths", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { relevantFiles: [{ path: "src/foo.js" }] } },
+      {},
+    );
+    expect(result.content).toContain("Tool: review_code");
+  });
+
+  it("detects architecture_review when context includes 'architecture'", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { context: "Architecture decision here" } },
+      {},
+    );
+    expect(result.content).toContain("Tool: architecture_review");
+  });
+
+  it("detects review_plan when input has projectSummary", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { projectSummary: "Project scope" } },
+      {},
+    );
+    expect(result.content).toContain("Tool: review_plan");
+  });
+
+  it("defaults to ask_chatgpt when no hints available", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test", input: { question: "hi" } },
+      {},
+    );
+    expect(result.content).toContain("Tool: ask_chatgpt");
+  });
+
+  it("uses 'unknown' when input is absent in request", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test" },
+      {},
+    );
+    expect(result.content).toContain("Tool: unknown");
+  });
+});
+
+// --- Long prompt handling ---
+
+describe("long prompt handling", () => {
+  it("adds warning banner for prompts over 30k characters", async () => {
+    const longPrompt = "x".repeat(31_000);
+    const result = await manualExportProvider.send({ prompt: longPrompt, input: {} }, {});
+    expect(result.content).toContain("⚠️ NOTE");
+  });
+
+  it("does NOT add warning for prompts under 30k characters", async () => {
+    const validPrompt = "x".repeat(29_999);
+    const result = await manualExportProvider.send({ prompt: validPrompt, input: {} }, {});
+    expect(result.content).not.toContain("⚠️ NOTE");
+  });
+
+  it("still returns valid output for very long prompts (>50k chars)", async () => {
+    const veryLongPrompt = "x".repeat(50_000);
+    const result = await manualExportProvider.send({ prompt: veryLongPrompt, input: {} }, {});
+    expect(result.content).toContain("MANUAL EXPORT");
+    expect(result.content.length).toBeGreaterThan(0);
+  });
+
+  it("shows correct character count in metadata for long prompts", async () => {
+    const length = 50_000;
+    const result = await manualExportProvider.send({ prompt: "x".repeat(length), input: {} }, {});
+    expect(result.content).toContain(`${length.toLocaleString()} characters`);
+  });
+
+  it("handles prompts at exactly the 30k boundary", async () => {
+    const exactPrompt = "x".repeat(30_000);
+    const result = await manualExportProvider.send({ prompt: exactPrompt, input: {} }, {});
+    expect(result.content).not.toContain("⚠️ NOTE"); // not over 30k, exactly at it
+  });
+});
+
+// --- Unicode and special characters ---
+
+describe("unicode and special characters", () => {
+  it("preserves Japanese characters in prompt", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "こんにちは世界", input: {} },
+      {},
+    );
+    expect(result.content).toContain("こんにちは世界");
+  });
+
+  it("preserves emoji in prompt", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "🚀 Launch plan 🎯", input: {} },
+      {},
+    );
+    expect(result.content).toContain("🚀");
+    expect(result.content).toContain("🎯");
+  });
+
+  it("preserves markdown code blocks in prompt", async () => {
+    const codePrompt = "```js\nconst x = 1;\n```";
+    const result = await manualExportProvider.send(
+      { prompt: codePrompt, input: {} },
+      {},
+    );
+    expect(result.content).toContain("```js");
+    expect(result.content).toContain("const x = 1;");
+  });
+
+  it("preserves JSON in prompt", async () => {
+    const jsonPrompt = '{"key": "value", "nested": {"a": 1}}';
+    const result = await manualExportProvider.send(
+      { prompt: jsonPrompt, input: {} },
+      {},
+    );
+    expect(result.content).toContain('"key"');
+    expect(result.content).toContain('"value"');
+  });
+
+  it("preserves special HTML-like characters", async () => {
+    const htmlPrompt = '<script>alert("xss")</script>';
+    const result = await manualExportProvider.send(
+      { prompt: htmlPrompt, input: {} },
+      {},
+    );
+    expect(result.content).toContain('<script>');
+    expect(result.content).toContain('"xss"');
+  });
+});
+
+// --- Empty / edge cases ---
+
+describe("empty and edge case handling", () => {
+  it("returns warning content when prompt is empty string", async () => {
+    const result = await manualExportProvider.send({ prompt: "", input: {} }, {});
+    expect(result.content).toContain("received no prompt to export");
+  });
+
+  it("returns warning content when prompt field is missing from request", async () => {
+    const result = await manualExportProvider.send({}, {});
+    expect(result.content).toContain("received no prompt to export");
+  });
+
+  it("returns warning content when request is null", async () => {
+    const result = await manualExportProvider.send(null, {});
+    expect(result.content).toContain("received no prompt to export");
+  });
+
+  it("returns warning content when request is undefined", async () => {
+    const result = await manualExportProvider.send(undefined, {});
+    expect(result.content).toContain("received no prompt to export");
+  });
+
+  it("handles null config gracefully", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, null);
+    expect(result.content).toContain("MANUAL EXPORT");
+  });
+
+  it("handles undefined config gracefully", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, undefined);
+    expect(result.content).toContain("MANUAL EXPORT");
+  });
+
+  it("handles single-line prompt without newlines", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "single line prompt" },
+      {},
+    );
+    expect(result.content).toContain("│ single line prompt");
+  });
+
+  it("handles prompts with only whitespace lines", async () => {
+    const wsPrompt = "\n\n   \n\t\n";
+    const result = await manualExportProvider.send({ prompt: wsPrompt }, {});
+    expect(result.content).toContain("MANUAL EXPORT");
+  });
+
+  it("preserves tab characters in prompt", async () => {
+    const tabPrompt = "first\tsecond\tthird";
+    const result = await manualExportProvider.send(
+      { prompt: tabPrompt },
+      {},
+    );
+    expect(result.content).toContain(tabPrompt);
+  });
+
+  it("preserves newlines within the copy box (each line as │)", async () => {
+    const nlPrompt = "line1\nline2\nline3";
+    const result = await manualExportProvider.send({ prompt: nlPrompt }, {});
+    // Each line should be wrapped with │ prefix
+    expect(result.content).toContain("│ line1");
+    expect(result.content).toContain("│ line2");
+    expect(result.content).toContain("│ line3");
+  });
+});
+
+// --- Provider contract compliance ---
+
+describe("provider contract compliance", () => {
+  it("returns a Promise (async function)", async () => {
+    const result = manualExportProvider.send({ prompt: "test" }, {});
+    expect(result).toBeInstanceOf(Promise);
+    await result; // don't leave unhandled promise
+  });
+
+  it("content is always a string, never null or object", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: "test" },
+      {},
+    );
+    expect(typeof result.content).toBe("string");
+    expect(result.content).not.toBeNull();
+    expect(result.content).not.toBeInstanceOf(Object);
+  });
+
+  it("content does not contain raw JSON (is text output)", async () => {
+    const result = await manualExportProvider.send(
+      { prompt: '{"json": "in prompt"}' },
+      {},
+    );
+    // The JSON string should appear in the │ wrapped lines, not as a top-level JSON object
+    expect(result.content).not.toBe("{" + '"content":"...' + "}");
+  });
+
+  it("always resolves (never rejects) for valid inputs", async () => {
+    const testCases = [
+      { prompt: "hi" },
+      { prompt: "" },
+      {},
+      null,
+    ];
+    for (const tc of testCases) {
+      await expect(manualExportProvider.send(tc, {})).resolves.toBeDefined();
+    }
+  });
+
+  it("is idempotent — same input always produces same output", async () => {
+    const inputs = [
+      { prompt: "prompt1", input: { question: "q1" } },
+      { prompt: "prompt2\nmultiline" },
+      {},
+    ];
+    for (const input of inputs) {
+      const r1 = await manualExportProvider.send(input, {});
+      const r2 = await manualExportProvider.send({ ...input }, {});
+      expect(r1.content).toBe(r2.content);
+    }
+  });
+});
+
+// --- Integration: separator lines ---
+
+describe("separator formatting", () => {
+  it("uses ══ as top and bottom border characters", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, {});
+    // Count border lines — should have exactly 2 (top and bottom)
+    const match = result.content.match(/═+/g);
+    expect(match).not.toBeNull();
+    expect(match.length).toBeGreaterThanOrEqual(2);
+  });
+
+  it("has matching top and bottom separator blocks", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, {});
+    const lines = result.content.split("\n");
+    expect(lines[0]).toMatch(/═+/);
+    expect(lines[lines.length - 1]).toMatch(/═+/);
+    // Top and bottom separators should be identical length
+    expect(lines[0].length).toBe(lines[lines.length - 1].length);
+  });
+
+  it("includes correct number of sections (header, copy box, instructions, metadata, footer)", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, {});
+    expect(result.content).toContain("MANUAL EXPORT");
+    expect(result.content).toContain("COPY THIS PROMPT");
+    expect(result.content).toContain("INSTRUCTIONS");
+    expect(result.content).toContain("METADATA");
+    expect(result.content).toContain("advisory output only");
+  });
+});
+
+// --- Repeatability ---
+
+describe("repeatability", () => {
+  it("creates identical providers for same config each time", async () => {
+    const results = [];
+    for (let i = 0; i < 10; i++) {
+      const r = await manualExportProvider.send({ prompt: "test" }, {});
+      results.push(r.content);
+    }
+    expect(results.every((c) => c === results[0])).toBe(true);
+  });
+
+  it("does not share mutable state between send calls", async () => {
+    const r1 = await manualExportProvider.send({ prompt: "call1" }, {});
+    const r2 = await manualExportProvider.send({ prompt: "call2" }, {});
+    expect(r1.content).not.toContain("call2");
+    expect(r2.content).not.toContain("call1");
+  });
+});
+
+// --- Visual structure validation ---
+
+describe("visual structure", () => {
+  it("copy box has equal left (┌) and right (┐/└/┘) corners", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, {});
+    expect(result.content).toContain("┌");
+    expect(result.content).toContain("┐");
+    expect(result.content).toContain("└");
+    expect(result.content).toContain("┘");
+  });
+
+  it("copy box content lines all start with │", async () => {
+    const result = await manualExportProvider.send({ prompt: "line1\nline2" }, {});
+    const lines = result.content.split("\n");
+    // Find the lines between ┌ and ┘ (the copy box content)
+    let inBox = false;
+    for (const line of lines) {
+      if (line.includes("┌─")) {
+        inBox = true;
+        continue;
+      }
+      if (line.includes("└─")) {
+        inBox = false;
+        continue;
+      }
+      if (inBox && !line.includes("📋")) {
+        // Content lines inside box should start with │
+        expect(line.startsWith("│ ")).toBe(true);
+      }
+    }
+  });
+
+  it("instructions section lists exactly 5 numbered steps", async () => {
+    const result = await manualExportProvider.send({ prompt: "test" }, {});
+    const instructionsMatch = result.content.match(/📝 INSTRUCTIONS:\n([\s\S]*?)(?=\n\n|$)/);
+    expect(instructionsMatch).not.toBeNull();
+    const stepLines = instructionsMatch[1].trim().split("\n").filter((l) => /^\d+\./.test(l.trim()));
+    expect(stepLines.length).toBe(5);
+  });
+
+  it("tool-specific content varies by detected tool", async () => {
+    const resultAsk = await manualExportProvider.send(
+      { prompt: "t", input: { question: "q" } },
+      {},
+    );
+    const resultDebug = await manualExportProvider.send(
+      { prompt: "t", input: { logs: "err" } },
+      {},
+    );
+    expect(resultAsk.content).toContain("ask_chatgpt");
+    expect(resultDebug.content).toContain("debug_issue");
+    expect(resultAsk.content).not.toContain("debug_issue");
+    expect(resultDebug.content).not.toContain("ask_chatgpt");
+  });
+});