diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e503882d..6a68c3769 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -80,6 +80,8 @@ Status: beta.
 - Agents: guard channel tool listActions to avoid plugin crashes. (#2859) Thanks @mbelinky.
 - Providers: update MiniMax API endpoint and compatibility mode. (#3064) Thanks @hlbbbbbbb.
 - Telegram: treat more network errors as recoverable in polling. (#3013) Thanks @ryancontent.
+- Discord: resolve usernames to user IDs for outbound messages. (#2649) Thanks @nonggialiang.
+- Providers: update Moonshot Kimi model references to kimi-k2.5. (#2762) Thanks @MarvinCui.
 - Gateway: suppress AbortError and transient network errors in unhandled rejections. (#2451) Thanks @Glucksberg.
 - TTS: keep /tts status replies on text-only commands and avoid duplicate block-stream audio. (#2451) Thanks @Glucksberg.
 - Security: pin npm overrides to keep tar@7.5.4 for install toolchains.
diff --git a/docs/concepts/model-providers.md b/docs/concepts/model-providers.md
index ef27fc9e3..9dbb984fc 100644
--- a/docs/concepts/model-providers.md
+++ b/docs/concepts/model-providers.md
@@ -130,9 +130,10 @@ Moonshot uses OpenAI-compatible endpoints, so configure it as a custom provider:
 
 - Provider: `moonshot`
 - Auth: `MOONSHOT_API_KEY`
-- Example model: `moonshot/kimi-k2-0905-preview`
+- Example model: `moonshot/kimi-k2.5`
 - Kimi K2 model IDs:
   {/* moonshot-kimi-k2-model-refs:start */}
+  - `moonshot/kimi-k2.5`
   - `moonshot/kimi-k2-0905-preview`
   - `moonshot/kimi-k2-turbo-preview`
   - `moonshot/kimi-k2-thinking`
@@ -141,7 +142,7 @@ Moonshot uses OpenAI-compatible endpoints, so configure it as a custom provider:
 ```json5
 {
   agents: {
-    defaults: { model: { primary: "moonshot/kimi-k2-0905-preview" } }
+    defaults: { model: { primary: "moonshot/kimi-k2.5" } }
   },
   models: {
     mode: "merge",
@@ -150,7 +151,7 @@ Moonshot uses OpenAI-compatible endpoints, so configure it as a custom provider:
         baseUrl: "https://api.moonshot.ai/v1",
         apiKey: "${MOONSHOT_API_KEY}",
         api: "openai-completions",
-        models: [{ id: "kimi-k2-0905-preview", name: "Kimi K2 0905 Preview" }]
+        models: [{ id: "kimi-k2.5", name: "Kimi K2.5" }]
       }
     }
   }
diff --git a/docs/gateway/configuration.md b/docs/gateway/configuration.md
index f5438fb46..15261c809 100644
--- a/docs/gateway/configuration.md
+++ b/docs/gateway/configuration.md
@@ -2396,8 +2396,8 @@ Use Moonshot's OpenAI-compatible endpoint:
   env: { MOONSHOT_API_KEY: "sk-..." },
   agents: {
     defaults: {
-      model: { primary: "moonshot/kimi-k2-0905-preview" },
-      models: { "moonshot/kimi-k2-0905-preview": { alias: "Kimi K2" } }
+      model: { primary: "moonshot/kimi-k2.5" },
+      models: { "moonshot/kimi-k2.5": { alias: "Kimi K2.5" } }
     }
   },
   models: {
@@ -2409,8 +2409,8 @@ Use Moonshot's OpenAI-compatible endpoint:
         api: "openai-completions",
         models: [
           {
-            id: "kimi-k2-0905-preview",
-            name: "Kimi K2 0905 Preview",
+            id: "kimi-k2.5",
+            name: "Kimi K2.5",
             reasoning: false,
             input: ["text"],
             cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
@@ -2426,7 +2426,7 @@ Use Moonshot's OpenAI-compatible endpoint:
 
 Notes:
 - Set `MOONSHOT_API_KEY` in the environment or use `moltbot onboard --auth-choice moonshot-api-key`.
-- Model ref: `moonshot/kimi-k2-0905-preview`.
+- Model ref: `moonshot/kimi-k2.5`.
 - Use `https://api.moonshot.cn/v1` if you need the China endpoint.
 
 ### Kimi Code
diff --git a/docs/providers/moonshot.md b/docs/providers/moonshot.md
index 7e0723f7e..a1f2d18ad 100644
--- a/docs/providers/moonshot.md
+++ b/docs/providers/moonshot.md
@@ -9,11 +9,12 @@ read_when:
 # Moonshot AI (Kimi)
 
 Moonshot provides the Kimi API with OpenAI-compatible endpoints. Configure the
-provider and set the default model to `moonshot/kimi-k2-0905-preview`, or use
+provider and set the default model to `moonshot/kimi-k2.5`, or use
 Kimi Code with `kimi-code/kimi-for-coding`.
 
 Current Kimi K2 model IDs:
 {/* moonshot-kimi-k2-ids:start */}
+- `kimi-k2.5`
 - `kimi-k2-0905-preview`
 - `kimi-k2-turbo-preview`
 - `kimi-k2-thinking`
@@ -39,9 +40,10 @@ Note: Moonshot and Kimi Code are separate providers. Keys are not interchangeabl
   env: { MOONSHOT_API_KEY: "sk-..." },
   agents: {
     defaults: {
-      model: { primary: "moonshot/kimi-k2-0905-preview" },
+      model: { primary: "moonshot/kimi-k2.5" },
       models: {
         // moonshot-kimi-k2-aliases:start
+        "moonshot/kimi-k2.5": { alias: "Kimi K2.5" },
         "moonshot/kimi-k2-0905-preview": { alias: "Kimi K2" },
         "moonshot/kimi-k2-turbo-preview": { alias: "Kimi K2 Turbo" },
         "moonshot/kimi-k2-thinking": { alias: "Kimi K2 Thinking" },
@@ -59,6 +61,15 @@ Note: Moonshot and Kimi Code are separate providers. Keys are not interchangeabl
         api: "openai-completions",
         models: [
           // moonshot-kimi-k2-models:start
+          {
+            id: "kimi-k2.5",
+            name: "Kimi K2.5",
+            reasoning: false,
+            input: ["text"],
+            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+            contextWindow: 256000,
+            maxTokens: 8192
+          },
           {
             id: "kimi-k2-0905-preview",
             name: "Kimi K2 0905 Preview",
diff --git a/src/agents/models-config.providers.ts b/src/agents/models-config.providers.ts
index cf1fde48d..d4b8fce31 100644
--- a/src/agents/models-config.providers.ts
+++ b/src/agents/models-config.providers.ts
@@ -31,7 +31,7 @@ const MINIMAX_API_COST = {
 };
 
 const MOONSHOT_BASE_URL = "https://api.moonshot.ai/v1";
-const MOONSHOT_DEFAULT_MODEL_ID = "kimi-k2-0905-preview";
+const MOONSHOT_DEFAULT_MODEL_ID = "kimi-k2.5";
 const MOONSHOT_DEFAULT_CONTEXT_WINDOW = 256000;
 const MOONSHOT_DEFAULT_MAX_TOKENS = 8192;
 const MOONSHOT_DEFAULT_COST = {
@@ -275,7 +275,7 @@ function buildMoonshotProvider(): ProviderConfig {
     models: [
       {
         id: MOONSHOT_DEFAULT_MODEL_ID,
-        name: "Kimi K2 0905 Preview",
+        name: "Kimi K2.5",
         reasoning: false,
         input: ["text"],
         cost: MOONSHOT_DEFAULT_COST,
diff --git a/src/discord/send.outbound.ts b/src/discord/send.outbound.ts
index a47d0f4f1..22b402ae3 100644
--- a/src/discord/send.outbound.ts
+++ b/src/discord/send.outbound.ts
@@ -13,7 +13,7 @@ import {
   createDiscordClient,
   normalizeDiscordPollInput,
   normalizeStickerIds,
-  parseRecipient,
+  parseAndResolveRecipient,
   resolveChannelId,
   sendDiscordMedia,
   sendDiscordText,
@@ -49,7 +49,7 @@ export async function sendMessageDiscord(
   const chunkMode = resolveChunkMode(cfg, "discord", accountInfo.accountId);
   const textWithTables = convertMarkdownTables(text ?? "", tableMode);
   const { token, rest, request } = createDiscordClient(opts, cfg);
-  const recipient = parseRecipient(to);
+  const recipient = await parseAndResolveRecipient(to, opts.accountId);
   const { channelId } = await resolveChannelId(rest, recipient, request);
   let result: { id: string; channel_id: string } | { id: string | null; channel_id: string };
   try {
@@ -104,7 +104,7 @@ export async function sendStickerDiscord(
 ): Promise<DiscordSendResult> {
   const cfg = loadConfig();
   const { rest, request } = createDiscordClient(opts, cfg);
-  const recipient = parseRecipient(to);
+  const recipient = await parseAndResolveRecipient(to, opts.accountId);
   const { channelId } = await resolveChannelId(rest, recipient, request);
   const content = opts.content?.trim();
   const stickers = normalizeStickerIds(stickerIds);
@@ -131,7 +131,7 @@ export async function sendPollDiscord(
 ): Promise<DiscordSendResult> {
   const cfg = loadConfig();
   const { rest, request } = createDiscordClient(opts, cfg);
-  const recipient = parseRecipient(to);
+  const recipient = await parseAndResolveRecipient(to, opts.accountId);
   const { channelId } = await resolveChannelId(rest, recipient, request);
   const content = opts.content?.trim();
   const payload = normalizeDiscordPollInput(poll);
diff --git a/src/discord/send.shared.ts b/src/discord/send.shared.ts
index 4919be29d..1cf2a93a9 100644
--- a/src/discord/send.shared.ts
+++ b/src/discord/send.shared.ts
@@ -13,7 +13,7 @@ import type { ChunkMode } from "../auto-reply/chunk.js";
 import { chunkDiscordTextWithMode } from "./chunk.js";
 import { fetchChannelPermissionsDiscord, isThreadChannelType } from "./send.permissions.js";
 import { DiscordSendError } from "./send.types.js";
-import { parseDiscordTarget } from "./targets.js";
+import { parseDiscordTarget, resolveDiscordTarget } from "./targets.js";
 import { normalizeDiscordToken } from "./token.js";
 
 const DISCORD_TEXT_LIMIT = 2000;
@@ -101,6 +101,44 @@ function parseRecipient(raw: string): DiscordRecipient {
   return { kind: target.kind, id: target.id };
 }
 
+/**
+ * Parse and resolve Discord recipient, including username lookup.
+ * This enables sending DMs by username (e.g., "john.doe") by querying
+ * the Discord directory to resolve usernames to user IDs.
+ *
+ * @param raw - The recipient string (username, ID, or known format)
+ * @param accountId - Discord account ID to use for directory lookup
+ * @returns Parsed DiscordRecipient with resolved user ID if applicable
+ */
+export async function parseAndResolveRecipient(
+  raw: string,
+  accountId?: string,
+): Promise<DiscordRecipient> {
+  const cfg = loadConfig();
+  const accountInfo = resolveDiscordAccount({ cfg, accountId });
+
+  // First try to resolve using directory lookup (handles usernames)
+  const resolved = await resolveDiscordTarget(raw, {
+    cfg,
+    accountId: accountInfo.accountId,
+  });
+
+  if (resolved) {
+    return { kind: resolved.kind, id: resolved.id };
+  }
+
+  // Fallback to standard parsing (for channels, etc.)
+  const parsed = parseDiscordTarget(raw, {
+    ambiguousMessage: `Ambiguous Discord recipient "${raw.trim()}". Use "user:${raw.trim()}" for DMs or "channel:${raw.trim()}" for channel messages.`,
+  });
+
+  if (!parsed) {
+    throw new Error("Recipient is required for Discord sends");
+  }
+
+  return { kind: parsed.kind, id: parsed.id };
+}
+
 function normalizeStickerIds(raw: string[]) {
   const ids = raw.map((entry) => entry.trim()).filter(Boolean);
   if (ids.length === 0) {
diff --git a/src/discord/targets.test.ts b/src/discord/targets.test.ts
index 3eee1eb1e..7ac39450b 100644
--- a/src/discord/targets.test.ts
+++ b/src/discord/targets.test.ts
@@ -1,7 +1,13 @@
-import { describe, expect, it } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 
+import type { ClawdbotConfig } from "../config/config.js";
 import { normalizeDiscordMessagingTarget } from "../channels/plugins/normalize/discord.js";
-import { parseDiscordTarget, resolveDiscordChannelId } from "./targets.js";
+import { listDiscordDirectoryPeersLive } from "./directory-live.js";
+import { parseDiscordTarget, resolveDiscordChannelId, resolveDiscordTarget } from "./targets.js";
+
+vi.mock("./directory-live.js", () => ({
+  listDiscordDirectoryPeersLive: vi.fn(),
+}));
 
 describe("parseDiscordTarget", () => {
   it("parses user mention and prefixes", () => {
@@ -68,6 +74,38 @@ describe("resolveDiscordChannelId", () => {
   });
 });
 
+describe("resolveDiscordTarget", () => {
+  const cfg = { channels: { discord: {} } } as ClawdbotConfig;
+  const listPeers = vi.mocked(listDiscordDirectoryPeersLive);
+
+  beforeEach(() => {
+    listPeers.mockReset();
+  });
+
+  it("returns a resolved user for usernames", async () => {
+    listPeers.mockResolvedValueOnce([{ kind: "user", id: "user:999", name: "Jane" } as const]);
+
+    await expect(
+      resolveDiscordTarget("jane", { cfg, accountId: "default" }),
+    ).resolves.toMatchObject({ kind: "user", id: "999", normalized: "user:999" });
+  });
+
+  it("falls back to parsing when lookup misses", async () => {
+    listPeers.mockResolvedValueOnce([]);
+    await expect(
+      resolveDiscordTarget("general", { cfg, accountId: "default" }),
+    ).resolves.toMatchObject({ kind: "channel", id: "general" });
+  });
+
+  it("does not call directory lookup for explicit user ids", async () => {
+    listPeers.mockResolvedValueOnce([]);
+    await expect(
+      resolveDiscordTarget("user:123", { cfg, accountId: "default" }),
+    ).resolves.toMatchObject({ kind: "user", id: "123" });
+    expect(listPeers).not.toHaveBeenCalled();
+  });
+});
+
 describe("normalizeDiscordMessagingTarget", () => {
   it("defaults raw numeric ids to channels", () => {
     expect(normalizeDiscordMessagingTarget("123")).toBe("channel:123");
diff --git a/src/discord/targets.ts b/src/discord/targets.ts
index 3a3c93ec8..311955182 100644
--- a/src/discord/targets.ts
+++ b/src/discord/targets.ts
@@ -5,8 +5,13 @@ import {
   type MessagingTarget,
   type MessagingTargetKind,
   type MessagingTargetParseOptions,
+  type DirectoryConfigParams,
+  type ChannelDirectoryEntry,
 } from "../channels/targets.js";
 
+import { listDiscordDirectoryPeersLive } from "./directory-live.js";
+import { resolveDiscordAccount } from "./accounts.js";
+
 export type DiscordTargetKind = MessagingTargetKind;
 
 export type DiscordTarget = MessagingTarget;
@@ -60,3 +65,60 @@ export function resolveDiscordChannelId(raw: string): string {
   const target = parseDiscordTarget(raw, { defaultKind: "channel" });
   return requireTargetKind({ platform: "Discord", target, kind: "channel" });
 }
+
+/**
+ * Resolve a Discord username to user ID using the directory lookup.
+ * This enables sending DMs by username instead of requiring explicit user IDs.
+ *
+ * @param raw - The username or raw target string (e.g., "john.doe")
+ * @param options - Directory configuration params (cfg, accountId, limit)
+ * @returns Parsed MessagingTarget with user ID, or undefined if not found
+ */
+export async function resolveDiscordTarget(
+  raw: string,
+  options: DirectoryConfigParams,
+): Promise<MessagingTarget | undefined> {
+  const trimmed = raw.trim();
+  if (!trimmed) return undefined;
+
+  // If already a known format, parse directly
+  const directParse = parseDiscordTarget(trimmed, options);
+  if (directParse && directParse.kind !== "channel" && !isLikelyUsername(trimmed)) {
+    return directParse;
+  }
+
+  // Try to resolve as a username via directory lookup
+  try {
+    const directoryEntries = await listDiscordDirectoryPeersLive({
+      ...options,
+      query: trimmed,
+      limit: 1,
+    });
+
+    const match = directoryEntries[0];
+    if (match && match.kind === "user") {
+      // Extract user ID from the directory entry (format: "user:<id>")
+      const userId = match.id.replace(/^user:/, "");
+      return buildMessagingTarget("user", userId, trimmed);
+    }
+  } catch (error) {
+    // Directory lookup failed - fall through to parse as-is
+    // This preserves existing behavior for channel names
+  }
+
+  // Fallback to original parsing (for channels, etc.)
+  return parseDiscordTarget(trimmed, options);
+}
+
+/**
+ * Check if a string looks like a Discord username (not a mention, prefix, or ID).
+ * Usernames typically don't start with special characters except underscore.
+ */
+function isLikelyUsername(input: string): boolean {
+  // Skip if it's already a known format
+  if (/^(user:|channel:|discord:|@|<@!?)|[\d]+$/.test(input)) {
+    return false;
+  }
+  // Likely a username if it doesn't match known patterns
+  return true;
+}