diff --git a/telegram.js b/telegram.js
index 55ca29d4e..e475d92ad 100644
--- a/telegram.js
+++ b/telegram.js
@@ -421,12 +421,14 @@ export async function notifyDeploy({ pair, amountSol, position, tx, priceRange,
   );
 }
 
-export async function notifyClose({ pair, pnlUsd, pnlPct }) {
+export async function notifyClose({ pair, pnlUsd, pnlPct, reason }) {
   if (hasActiveLiveMessage()) return;
   const sign = pnlUsd >= 0 ? "+" : "";
+  const reasonLine = reason ? `Reason: ${reason}\n` : "";
   await sendHTML(
     `🔒 <b>Closed</b> ${pair}\n` +
-    `PnL: ${sign}$${(pnlUsd ?? 0).toFixed(2)} (${sign}${(pnlPct ?? 0).toFixed(2)}%)`
+    `PnL: ${sign}$${(pnlUsd ?? 0).toFixed(2)} (${sign}${(pnlPct ?? 0).toFixed(2)}%)\n` +
+    reasonLine
   );
 }
 
diff --git a/tests/unit/telegram.test.js b/tests/unit/telegram.test.js
new file mode 100644
index 000000000..2490f52bf
--- /dev/null
+++ b/tests/unit/telegram.test.js
@@ -0,0 +1,149 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { log } from "../../logger.js";
+
+vi.mock("../../logger.js", () => ({
+  log: vi.fn(),
+}));
+
+// ─── fetch mock ─────────────────────────────────────────────────────────────
+let fetchCalls = [];
+const mockFetch = vi.fn((url, opts) => {
+  fetchCalls.push({ url, opts });
+  return Promise.resolve({
+    ok: true,
+    json: () => Promise.resolve({ ok: true }),
+  });
+});
+vi.stubGlobal("fetch", mockFetch);
+
+// ─── env setup ──────────────────────────────────────────────────────────────
+const ORIG_ENV = { ...process.env };
+beforeEach(() => {
+  vi.clearAllMocks();
+  fetchCalls = [];
+  process.env.TELEGRAM_BOT_TOKEN = "test:bot123";
+  process.env.TELEGRAM_CHAT_ID = "98765";
+  process.env.TELEGRAM_ALLOWED_USER_IDS = "111,222";
+  vi.resetModules();
+});
+
+afterEach(() => {
+  Object.assign(process.env, ORIG_ENV);
+});
+
+// ─── helpers ────────────────────────────────────────────────────────────────
+function extractSentMessage() {
+  if (fetchCalls.length === 0) return null;
+  const { opts } = fetchCalls[fetchCalls.length - 1];
+  const body = JSON.parse(opts.body);
+  return body.text;
+}
+
+describe("notifyClose", () => {
+  it("includes reason below PnL when provided", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "SOL-USDC", pnlUsd: 1.23, pnlPct: 3.45, reason: "take profit: good return" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("🔒 <b>Closed</b> SOL-USDC");
+    expect(msg).toContain("PnL: +$1.23 (+3.45%)");
+    expect(msg).toContain("Reason: take profit: good return");
+    // reason appears after PnL
+    const pnlIdx = msg.indexOf("PnL:");
+    const reasonIdx = msg.indexOf("Reason:");
+    expect(reasonIdx).toBeGreaterThan(pnlIdx);
+  });
+
+  it("omits reason line when reason is not provided (backward compat)", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "SOL-USDC", pnlUsd: 1.23, pnlPct: 3.45 });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("🔒 <b>Closed</b> SOL-USDC");
+    expect(msg).toContain("PnL: +$1.23 (+3.45%)");
+    expect(msg).not.toContain("Reason:");
+  });
+
+  it("omits reason line when reason is empty string", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "SOL-USDC", pnlUsd: 0.5, pnlPct: 1.2, reason: "" });
+
+    const msg = extractSentMessage();
+    expect(msg).not.toContain("Reason:");
+  });
+
+  it("shows + sign for positive PnL", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "BONK-SOL", pnlUsd: 5.0, pnlPct: 12.5, reason: "take profit" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("+$5.00 (+12.50%)");
+  });
+
+  it("shows - sign for negative PnL", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "RKC-SOL", pnlUsd: -3.78, pnlPct: -9.71, reason: "stop loss: PnL -3.22% <= -3%" });
+
+    const msg = extractSentMessage();
+    // sign is empty for negatives; toFixed produces "-3.78" → "$-3.78 (-9.71%)"
+    expect(msg).toContain("$-3.78 (-9.71%)");
+  });
+
+  it("handles zero PnL", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "TEST-SOL", pnlUsd: 0, pnlPct: 0, reason: "breakeven" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("+$0.00 (+0.00%)");
+  });
+
+  it("handles null/undefined PnL gracefully", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "TEST-SOL", pnlUsd: null, pnlPct: undefined, reason: "test" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("+$0.00 (+0.00%)");
+  });
+});
+
+describe("notifyClose reason — real-world close_reason values from lessons.json", () => {
+  it("displays stop loss reason from dlmm.js format", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "RKC-SOL", pnlUsd: -3.78, pnlPct: -9.71, reason: "stop loss: PnL -3.22% <= -3%" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("Reason: stop loss: PnL -3.22% <= -3%");
+  });
+
+  it("displays user-requested close reason", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "ASTEROID-SOL", pnlUsd: 0.57, pnlPct: 1.46, reason: "User requested to close all positions and stop the bot" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("Reason: User requested to close all positions and stop the bot");
+  });
+
+  it("displays low yield reason", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "SOL-USDC", pnlUsd: 0.12, pnlPct: 0.3, reason: "low yield" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("Reason: low yield");
+  });
+
+  it("displays out-of-range close reason", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "SOL-USDC", pnlUsd: 0.33, pnlPct: 0.86, reason: "Out of range" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("Reason: Out of range");
+  });
+
+  it("displays agent decision default reason", async () => {
+    const { notifyClose } = await import("../../telegram.js");
+    await notifyClose({ pair: "JUP-SOL", pnlUsd: -1.2, pnlPct: -3.1, reason: "agent decision" });
+
+    const msg = extractSentMessage();
+    expect(msg).toContain("Reason: agent decision");
+  });
+});
diff --git a/tools/executor.js b/tools/executor.js
index be556569d..f45c381cc 100644
--- a/tools/executor.js
+++ b/tools/executor.js
@@ -600,7 +600,7 @@ export async function executeTool(name, args) {
       } else if (name === "deploy_position") {
         notifyDeploy({ pair: result.pool_name || args.pool_name || args.pool_address?.slice(0, 8), amountSol: args.amount_y ?? args.amount_sol ?? 0, position: result.position, tx: result.txs?.[0] ?? result.tx, priceRange: result.price_range, rangeCoverage: result.range_coverage, binStep: result.bin_step, baseFee: result.base_fee }).catch(() => {});
       } else if (name === "close_position") {
-        notifyClose({ pair: result.pool_name || args.position_address?.slice(0, 8), pnlUsd: result.pnl_usd ?? 0, pnlPct: result.pnl_pct ?? 0 }).catch(() => {});
+        notifyClose({ pair: result.pool_name || args.position_address?.slice(0, 8), pnlUsd: result.pnl_usd ?? 0, pnlPct: result.pnl_pct ?? 0, reason: args.reason }).catch(() => {});
         // Note low-yield closes in pool memory so screener avoids redeploying
         if (args.reason && args.reason.toLowerCase().includes("yield")) {
           const poolAddr = result.pool || args.pool_address;