diff --git a/apps/memos-local-plugin/core/config/defaults.ts b/apps/memos-local-plugin/core/config/defaults.ts
index 6f06210d0..a043b4cd4 100644
--- a/apps/memos-local-plugin/core/config/defaults.ts
+++ b/apps/memos-local-plugin/core/config/defaults.ts
@@ -57,6 +57,8 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
     providerIgnore: [],
     providerOrder: [],
     openRouter: false,
+    maxTokens: 1024,
+    headers: {},
   },
   l3Llm: {
     // Empty by default — falls back to the shared `llm` settings.
@@ -73,6 +75,7 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
     providerIgnore: [],
     providerOrder: [],
     openRouter: false,
+    maxTokens: 4096,
   },
   skillEvolver: {
     // Empty by default — falls back to the shared `llm` settings.
@@ -87,6 +90,7 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
     providerIgnore: [],
     providerOrder: [],
     openRouter: false,
+    maxTokens: 4096,
   },
   storage: {
     ftsTokenizer: "trigram",
diff --git a/apps/memos-local-plugin/core/config/index.ts b/apps/memos-local-plugin/core/config/index.ts
index 6d529d960..64370f5ad 100644
--- a/apps/memos-local-plugin/core/config/index.ts
+++ b/apps/memos-local-plugin/core/config/index.ts
@@ -165,6 +165,13 @@ function pruneUnknown(
       continue;
     }
     if (isPlainObject(v) && isPlainObject((defaults as Record<string, unknown>)[k])) {
+      if (Object.keys((defaults as Record<string, unknown>)[k] as Record<string, unknown>).length === 0) {
+        // Empty-object default slot = free-form map (e.g. llm.headers, a
+        // Record<string,string>). Keep the whole user object as-is; recursing
+        // would warn on every user key.
+        out[k] = v;
+        continue;
+      }
       out[k] = pruneUnknown(v, (defaults as Record<string, unknown>)[k], path, warnings);
     } else {
       out[k] = v;
diff --git a/apps/memos-local-plugin/core/config/schema.ts b/apps/memos-local-plugin/core/config/schema.ts
index 8566f90f3..ff9c1f319 100644
--- a/apps/memos-local-plugin/core/config/schema.ts
+++ b/apps/memos-local-plugin/core/config/schema.ts
@@ -99,6 +99,10 @@ const LlmSchema = Type.Object({
   openRouter: Type.Optional(Bool(false)),
   /** Optional reasoning control (see ReasoningSchema). Omit = model default. */
   reasoning: Type.Optional(ReasoningSchema),
+  /** Max output tokens per completion (deepseek-v4-flash needs >= 100). */
+  maxTokens: NumberInRange(1024, 16, 131072),
+  /** Extra HTTP headers for the provider request. */
+  headers: Type.Optional(Type.Record(Type.String(), Type.String(), { default: {} })),
 }, { default: {} });
 
 /**
@@ -131,6 +135,10 @@ const SkillEvolverSchema = Type.Object({
   openRouter: Type.Optional(Bool(false)),
   /** Optional reasoning control (see ReasoningSchema). Omit = model default. */
   reasoning: Type.Optional(ReasoningSchema),
+  /** Max output tokens per completion. */
+  maxTokens: NumberInRange(1024, 16, 131072),
+  /** Extra HTTP headers for the provider request. */
+  headers: Type.Optional(Type.Record(Type.String(), Type.String(), { default: {} })),
 }, { default: {} });
 
 const StorageSchema = Type.Object({
diff --git a/apps/memos-local-plugin/core/pipeline/memory-core.ts b/apps/memos-local-plugin/core/pipeline/memory-core.ts
index 01402a86b..76e65d700 100644
--- a/apps/memos-local-plugin/core/pipeline/memory-core.ts
+++ b/apps/memos-local-plugin/core/pipeline/memory-core.ts
@@ -137,6 +137,10 @@ type DedicatedLlmConfig = {
   providerOrder?: string[];
   openRouter?: boolean;
   reasoning?: ReasoningConfig;
+  /** Max output tokens per completion. */
+  maxTokens?: number;
+  /** Extra HTTP headers for the provider request. */
+  headers?: Record<string, string>;
 };
 
 export interface BootstrapOptions {
@@ -437,6 +441,8 @@ export async function bootstrapMemoryCoreFull(
         providerOrder: evolver?.providerOrder,
         openRouter: evolver?.openRouter ?? false,
         reasoning: evolver?.reasoning,
+        maxTokens: evolver?.maxTokens,
+        headers: evolver?.headers,
         maxRetries: 3,
         // V7 §0.x — when the user's dedicated skill-evolver model is
         // down (auth, model name typo, server outage), prefer falling
@@ -499,6 +505,8 @@ export async function bootstrapMemoryCoreFull(
         providerOrder: l3c?.providerOrder,
         openRouter: l3c?.openRouter ?? false,
         reasoning: l3c?.reasoning,
+        maxTokens: l3c?.maxTokens,
+        headers: l3c?.headers,
         maxRetries: 3,
         fallbackToHost: true,
         onError: (d: { provider: string; model: string; message: string; code?: string; at?: number }) =>
diff --git a/apps/memos-local-plugin/tests/unit/config/llm-max-tokens-headers.test.ts b/apps/memos-local-plugin/tests/unit/config/llm-max-tokens-headers.test.ts
new file mode 100644
index 000000000..40e929a78
--- /dev/null
+++ b/apps/memos-local-plugin/tests/unit/config/llm-max-tokens-headers.test.ts
@@ -0,0 +1,78 @@
+import { describe, expect, it } from "vitest";
+
+import { DEFAULT_CONFIG, resolveConfig } from "../../../core/config/index.js";
+
+describe("resolveConfig llm.maxTokens + llm.headers", () => {
+  it("accepts llm.maxTokens and llm.headers without unknown-key warnings", () => {
+    const warnings: string[] = [];
+    const cfg = resolveConfig(
+      {
+        llm: {
+          maxTokens: 2048,
+          headers: { "User-Agent": "hermes-test", "X-Custom": "v1" },
+        },
+      },
+      warnings,
+    );
+    expect(cfg.llm.maxTokens).toBe(2048);
+    expect(cfg.llm.headers).toEqual({ "User-Agent": "hermes-test", "X-Custom": "v1" });
+    // The free-form-map special case must not warn per header key.
+    expect(warnings).toEqual([]);
+  });
+
+  it("declares llm.maxTokens with a sane default of 1024", () => {
+    expect(DEFAULT_CONFIG.llm.maxTokens).toBe(1024);
+    const cfg = resolveConfig({});
+    expect(cfg.llm.maxTokens).toBe(1024);
+  });
+
+  it("declares llm.headers defaulting to an empty map", () => {
+    expect(DEFAULT_CONFIG.llm.headers).toEqual({});
+    const cfg = resolveConfig({});
+    expect(cfg.llm.headers).toEqual({});
+  });
+
+  it("declares skillEvolver.maxTokens (default 4096) for the crystallizer LLM slot", () => {
+    expect(DEFAULT_CONFIG.skillEvolver.maxTokens).toBe(4096);
+    const cfg = resolveConfig({ skillEvolver: { maxTokens: 8192 } });
+    expect(cfg.skillEvolver.maxTokens).toBe(8192);
+  });
+
+  it("declares l3Llm.maxTokens (default 4096) sharing the SkillEvolver schema", () => {
+    expect(DEFAULT_CONFIG.l3Llm.maxTokens).toBe(4096);
+    const cfg = resolveConfig({ l3Llm: { maxTokens: 8192 } });
+    expect(cfg.l3Llm.maxTokens).toBe(8192);
+  });
+
+  it("accepts headers on skillEvolver/l3Llm slots (shared SkillEvolverSchema)", () => {
+    const cfg = resolveConfig({
+      skillEvolver: { headers: { "X-Evolver": "v1" } },
+      l3Llm: { headers: { "X-L3": "v2" } },
+    });
+    expect(cfg.skillEvolver.headers).toEqual({ "X-Evolver": "v1" });
+    expect(cfg.l3Llm.headers).toEqual({ "X-L3": "v2" });
+    expect(cfg.l3Llm.maxTokens).toBe(4096);
+  });
+
+  it("rejects out-of-range maxTokens with config_invalid", () => {
+    expect(() => resolveConfig({ llm: { maxTokens: 8 } })).toThrow(/config failed schema validation/);
+  });
+
+  it("rejects non-string header values", () => {
+    expect(() => resolveConfig({ llm: { headers: { "X-Bad": 42 } } })).toThrow(
+      /config failed schema validation/,
+    );
+  });
+
+  it("keeps unrelated llm fields untouched when maxTokens/headers are set", () => {
+    const cfg = resolveConfig({
+      llm: { provider: "openai_compatible", model: "deepseek-v4-flash", maxTokens: 2048 },
+    });
+    expect(cfg.llm.provider).toBe("openai_compatible");
+    expect(cfg.llm.model).toBe("deepseek-v4-flash");
+    expect(cfg.llm.temperature).toBe(0);
+    expect(cfg.llm.fallbackToHost).toBe(true);
+    expect(cfg.llm.timeoutMs).toBe(45_000);
+    expect(cfg.llm.maxRetries).toBe(3);
+  });
+});