diff --git a/src/main/database/migrations/066-task-writing-mode.ts b/src/main/database/migrations/066-task-writing-mode.ts
new file mode 100644
index 00000000..bab4afe0
--- /dev/null
+++ b/src/main/database/migrations/066-task-writing-mode.ts
@@ -0,0 +1,7 @@
+export const taskWritingModeSchema = `
+  alter table tasks add column writing_mode text not null default 'conversational'
+    check (writing_mode in ('conversational', 'technical', 'structured'));
+
+  insert into schema_migrations(version, name, applied_at)
+  values (66, 'task_writing_mode', datetime('now'));
+`;
diff --git a/src/main/database/schema.ts b/src/main/database/schema.ts
index 181c35cd..721493c7 100644
--- a/src/main/database/schema.ts
+++ b/src/main/database/schema.ts
@@ -64,6 +64,7 @@ import { providerContextWindowSchema } from "./migrations/062-provider-context-w
 import { knowledgeScopeSchema } from "./migrations/063-knowledge-scope";
 import { knowledgeRevisionsSchema } from "./migrations/064-knowledge-revisions";
 import { documentVersionsSchema } from "./migrations/065-document-versions";
+import { taskWritingModeSchema } from "./migrations/066-task-writing-mode";
 
 interface Migration {
   version: number;
@@ -137,6 +138,7 @@ const MIGRATIONS: Migration[] = [
   { version: 63, name: "knowledge_scope", sql: knowledgeScopeSchema },
   { version: 64, name: "knowledge_revisions", sql: knowledgeRevisionsSchema },
   { version: 65, name: "document_versions", sql: documentVersionsSchema },
+  { version: 66, name: "task_writing_mode", sql: taskWritingModeSchema },
 ];
 
 const SCHEMA_VERSION = MIGRATIONS[MIGRATIONS.length - 1].version;
diff --git a/src/main/services/agent-skill-tools.ts b/src/main/services/agent-skill-tools.ts
index 1cf55c4b..4a99f55d 100644
--- a/src/main/services/agent-skill-tools.ts
+++ b/src/main/services/agent-skill-tools.ts
@@ -30,7 +30,7 @@ export function listSkillsTool(deps: AgentToolDeps, ctx: AgentToolContext): stri
     const summary = skillSummary(skill.manifest_json);
     if (forced.has(skill.slug)) {
       const language = skill.slug === "humanizer-zh" ? "Chinese" : "English";
-      return `- ${skill.name} (${skill.slug})${summary}: house style — carried automatically by every agent when the app language is ${language}`;
+      return `- ${skill.name} (${skill.slug})${summary}: house style — carried automatically by every agent on conversational tasks when the app language is ${language}`;
     }
     const holders = bindings
       .filter((binding) => binding.skill_id === skill.id)
diff --git a/src/main/services/agent-tools.ts b/src/main/services/agent-tools.ts
index d58e8bc1..f585d64b 100644
--- a/src/main/services/agent-tools.ts
+++ b/src/main/services/agent-tools.ts
@@ -1,5 +1,5 @@
 import type { DatabaseSync } from "node:sqlite";
-import { RISK_LEVEL, TASK_PRIORITY, TASK_STATUS, type RiskLevel } from "../../shared/domain";
+import { RISK_LEVEL, TASK_PRIORITY, TASK_STATUS, WRITING_MODE, type RiskLevel, type WritingMode } from "../../shared/domain";
 import { ORGANIZATION_DEPARTMENTS } from "./org-governance-service";
 import type { OrganizationService } from "./organization-service";
 import { buildTaskHandoff, HANDOFF_TOOL_PROPERTIES } from "./agent-task-handoff";
@@ -15,7 +15,7 @@ import { KNOWLEDGE_TOOLS, recordKnowledgeTool, reviseKnowledgeTool, searchKnowle
 import { DOCUMENT_TOOLS, DOCUMENT_TYPES, listDocumentsTool, readDocumentTool, updateDocumentTool } from "./agent-document-tools";
 import { sendMessageTool } from "./agent-send-message";
 import { withSavepoint } from "../database/connection";
-import { optionalString, optionalStringArray, requireString } from "./agent-tool-args";
+import { optionalEnum, optionalString, optionalStringArray, requireString } from "./agent-tool-args";
 import type { JsonRecord } from "./provider-http";
 import type { ToolCall, ToolDefinition } from "./provider-tool-turn";
 
@@ -85,6 +85,11 @@ export const AGENT_TOOLS: ToolDefinition[] = [
           type: "boolean",
           description: "Set true for engineering work that must change code or run commands (build, test) in the workspace. The assignee then gets run_command; the operator approves such tasks before they execute.",
         },
+        writing_mode: {
+          type: "string",
+          enum: ["conversational", "technical", "structured"],
+          description: "How the output reads. conversational (default): plain human prose in house style. technical: specs, API docs, code reviews; precise, no house style. structured: output must match an exact format (JSON, table, template).",
+        },
         ...HANDOFF_TOOL_PROPERTIES,
       },
       required: ["title", "description"],
@@ -337,6 +342,7 @@ function createTask(deps: AgentToolDeps, ctx: AgentToolContext, args: JsonRecord
   const assignee = assigneeName ? requireRunnableAgentByName(deps.db, ctx.orgId, assigneeName) : null;
   const handoff = buildTaskHandoff(deps.db, ctx.orgId, { taskId: ctx.taskId, threadId: ctx.sourceThreadId }, args);
   const parentTaskId = delegationParent(deps.db, ctx);
+  const writingMode = optionalEnum(args.writing_mode, "writing_mode", Object.values(WRITING_MODE), WRITING_MODE.CONVERSATIONAL) as WritingMode;
   const create = () => {
     const taskId = deps.organization.createTask({
       orgId: ctx.orgId,
@@ -350,6 +356,7 @@ function createTask(deps: AgentToolDeps, ctx: AgentToolContext, args: JsonRecord
       workspaceId: ctx.workspace?.id ?? null,
       priority: TASK_PRIORITY.NORMAL,
       requiresFilesystem: args.requires_filesystem === true,
+      writingMode,
     });
     deps.db.prepare("update tasks set handoff_json = ?, parent_task_id = ? where id = ?")
       .run(JSON.stringify(handoff), parentTaskId, taskId);
diff --git a/src/main/services/organization-service.ts b/src/main/services/organization-service.ts
index edb5ab3f..211120d3 100644
--- a/src/main/services/organization-service.ts
+++ b/src/main/services/organization-service.ts
@@ -1,5 +1,5 @@
 import type { DatabaseSync } from "node:sqlite";
-import { APPROVAL_STATE, RISK_LEVEL, TASK_STATUS, type ApprovalState } from "../../shared/domain";
+import { APPROVAL_STATE, RISK_LEVEL, TASK_STATUS, WRITING_MODE, type ApprovalState } from "../../shared/domain";
 import { createId } from "../../shared/ids";
 import type { CreateAgentInput, CreateGoalInput, CreateOrganizationInput, CreateProjectInput, CreateTaskInput, CreateWorkspaceInput, DeleteTaskInput, UpdateAgentInput, UpdateEmployeeProfileInput, UpdateTaskInput } from "../../shared/commands";
 import { AuditService } from "./audit-service";
@@ -234,9 +234,9 @@ export class OrganizationService {
     this.db.prepare(`
       insert into tasks(
         id, org_id, title, description, status, assignee_agent_id, risk,
-        project_id, goal_id, workspace_id, priority, requires_filesystem, origin, created_at, updated_at
+        project_id, goal_id, workspace_id, priority, requires_filesystem, writing_mode, origin, created_at, updated_at
       )
-      values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+      values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `).run(
       id,
       input.orgId,
@@ -250,6 +250,7 @@ export class OrganizationService {
       input.workspaceId,
       input.priority,
       input.requiresFilesystem ? 1 : 0,
+      input.writingMode ?? WRITING_MODE.CONVERSATIONAL,
       input.origin ?? null,
       now,
       now,
diff --git a/src/main/services/skill-service.ts b/src/main/services/skill-service.ts
index dc1b22aa..aeba39cc 100644
--- a/src/main/services/skill-service.ts
+++ b/src/main/services/skill-service.ts
@@ -244,8 +244,8 @@ export class SkillService {
    * agent carries the forced house-style skill once the catalogue holds a
    * language variant, plus whatever bindings the CEO granted.
    */
-  hasRuntimeSkills(orgId: string, agentId: string): boolean {
-    if (this.forcedSkillRows(orgId).length > 0) return true;
+  hasRuntimeSkills(orgId: string, agentId: string, houseStyle: boolean): boolean {
+    if (houseStyle && this.forcedSkillRows(orgId).length > 0) return true;
     return Boolean(this.db.prepare(`
       select sb.id from skill_bindings sb join skill_definitions sd on sd.id = sb.skill_id and sd.status = 'active'
       where sb.org_id = ? and sb.agent_id = ? and sb.enabled = 1 limit 1
@@ -294,7 +294,7 @@ export class SkillService {
    * prompt instead of silently overflowing the model's context.
    */
   resolveRuntimeSnapshot(input: ResolveAgentSkillsInput): string {
-    const forcedRows = this.forcedSkillRows(input.orgId);
+    const forcedRows = input.houseStyle ? this.forcedSkillRows(input.orgId) : [];
     const boundRows = this.db.prepare(`
       select
         sb.skill_id as skill_id,
diff --git a/src/main/services/task-execution-service.ts b/src/main/services/task-execution-service.ts
index 83853437..fa023ef0 100644
--- a/src/main/services/task-execution-service.ts
+++ b/src/main/services/task-execution-service.ts
@@ -1,6 +1,6 @@
 import type { DatabaseSync } from "node:sqlite";
 import type { RunTaskInput } from "../../shared/commands";
-import { TASK_STATUS } from "../../shared/domain";
+import { TASK_STATUS, WRITING_MODE } from "../../shared/domain";
 import { isTransientProviderFailure } from "../../shared/provider-runtime-domain";
 import { createId } from "../../shared/ids";
 import { AuditService } from "./audit-service";
@@ -148,7 +148,7 @@ export class TaskExecutionService {
     let providerRequestId: string | null = null;
     let skillRuntimeSnapshot: SkillRuntimeSnapshotRow | null = null;
     try {
-      skillRuntimeSnapshot = this.resolveSkillRuntimeSnapshot(orgId, agent.id, runId, skillBudgetTokens(provider.context_window_tokens), `${task.title}\n${task.description}`, { providerKey: provider.provider_key, model: provider.model });
+      skillRuntimeSnapshot = this.resolveSkillRuntimeSnapshot(orgId, agent.id, runId, skillBudgetTokens(provider.context_window_tokens), `${task.title}\n${task.description}`, { providerKey: provider.provider_key, model: provider.model }, task.writing_mode === WRITING_MODE.CONVERSATIONAL);
       // Watermark for reply delivery and mid-run message polling.
       const runStartedAt = new Date().toISOString();
       const chatContext = loadChatWakeContext(this.db, orgId, agent.id, isolation.secretScopeJson);
@@ -391,9 +391,9 @@ export class TaskExecutionService {
     `).run(TASK_RUN_STATE.FAILED, providerRequestId, new Date().toISOString(), errorMessage, runId, orgId);
   }
 
-  private resolveSkillRuntimeSnapshot(orgId: string, agentId: string, runId: string, maxTokens: number, taskText: string, runModel: RunModel): SkillRuntimeSnapshotRow | null {
-    if (!this.skills.hasRuntimeSkills(orgId, agentId)) return null;
-    const snapshotId = this.skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens, taskText, runModel });
+  private resolveSkillRuntimeSnapshot(orgId: string, agentId: string, runId: string, maxTokens: number, taskText: string, runModel: RunModel, houseStyle: boolean): SkillRuntimeSnapshotRow | null {
+    if (!this.skills.hasRuntimeSkills(orgId, agentId, houseStyle)) return null;
+    const snapshotId = this.skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens, taskText, runModel, houseStyle });
     const snapshot = this.db.prepare(`
       select id, compiled_prompt, tools_manifest, source_revision_ids
       from skill_runtime_snapshots
diff --git a/src/main/services/task-prompts.ts b/src/main/services/task-prompts.ts
index f8768797..08f8fa3d 100644
--- a/src/main/services/task-prompts.ts
+++ b/src/main/services/task-prompts.ts
@@ -1,3 +1,4 @@
+import { WRITING_MODE, type WritingMode } from "../../shared/domain";
 import { canonicalMentionHandle } from "../../shared/mention-handles";
 
 const RECORD_LEARNINGS_INSTRUCTION =
@@ -16,6 +17,7 @@ export interface TaskExecutionTaskRow {
   workspace_id: string | null;
   priority: string;
   requires_filesystem: number;
+  writing_mode: WritingMode;
   handoff_json: string | null;
   origin: string | null;
 }
@@ -132,7 +134,7 @@ function capabilityBriefing(input: AgentInstructionContext): string {
   );
   if (input.isCeo) {
     lines.push(
-      "You are the CEO: you automatically carry every connected service, and access for everyone else is yours to manage — when you delegate work that needs an external service, grant it first with grant_connector and take it back with revoke_connector when done. The company also ships a built-in skill library: staff every hire with the skills their role needs by passing skills to hire_agent (several per person is normal), and adjust later with grant_skill / revoke_skill. You run only with skills granted to you too: grant yourself a playbook before you rely on it. A teammate without the grant cannot use the tool or skill, so grant before you assign. The humanizer skill is company house style — every agent, you included, carries it automatically and must write like a person, not like an AI.",
+      "You are the CEO: you automatically carry every connected service, and access for everyone else is yours to manage — when you delegate work that needs an external service, grant it first with grant_connector and take it back with revoke_connector when done. The company also ships a built-in skill library: staff every hire with the skills their role needs by passing skills to hire_agent (several per person is normal), and adjust later with grant_skill / revoke_skill. You run only with skills granted to you too: grant yourself a playbook before you rely on it. A teammate without the grant cannot use the tool or skill, so grant before you assign. The humanizer skill is company house style — every agent, you included, carries it on conversational work and must write like a person, not like an AI. For specs and API docs pass writing_mode technical to create_task; for output in an exact format pass structured; both skip house style.",
     );
   } else if (input.connectorNames.length === 0) {
     lines.push(
@@ -160,6 +162,17 @@ function roleVoice(input: AgentInstructionContext): string {
   return "You own your craft. Ask the question early instead of guessing, do the work properly, and when you are stuck for more than a few minutes say so in the thread instead of spinning in place.";
 }
 
+/** The writing rule for technical and structured tasks, which run without house style. */
+export function writingModeLines(mode: WritingMode): string[] {
+  if (mode === WRITING_MODE.TECHNICAL) {
+    return ["", "Technical writing: this task's output is a spec or technical document. Be exact and complete: define terms, name types, units and edge cases, prefer lists and tables over prose, and never trade precision for tone."];
+  }
+  if (mode === WRITING_MODE.STRUCTURED) {
+    return ["", "Structured output: the deliverable must match the requested format exactly (JSON, table, template). No prose around it, no extra fields, no commentary inside it."];
+  }
+  return [];
+}
+
 function skillToolLines(toolsManifest: string, available: string[]): string[] {
   const { requiredTools } = JSON.parse(toolsManifest) as { requiredTools: string[] };
   const missing = requiredTools.filter((tool) => !available.includes(tool));
@@ -216,6 +229,7 @@ export function buildTaskPrompt(input: {
       `Mounts: ${input.isolation.workspaceMountJson}`,
     );
   }
+  lines.push(...writingModeLines(input.task.writing_mode));
   lines.push(...input.handoffLines);
   lines.push(...input.knowledgeLines);
   lines.push("", `Secret scope: ${input.isolation.secretScopeJson}`);
diff --git a/src/renderer/src/i18n/zh.ts b/src/renderer/src/i18n/zh.ts
index b5de9d27..aed4e01e 100644
--- a/src/renderer/src/i18n/zh.ts
+++ b/src/renderer/src/i18n/zh.ts
@@ -28,6 +28,10 @@ export const zh: Record<string, string> = {
   "Advanced": "高级",
   "Integrations": "集成密钥",
   "Document": "文档",
+  "Writing": "写作方式",
+  "Conversational (house style)": "日常沟通（公司文风）",
+  "Technical spec": "技术规格",
+  "Structured output": "结构化输出",
   "Applies to": "适用范围",
   "Category": "类别",
   "Content": "内容",
diff --git a/src/renderer/src/pages/NewTaskDialog.tsx b/src/renderer/src/pages/NewTaskDialog.tsx
index a5b82206..aaece3d5 100644
--- a/src/renderer/src/pages/NewTaskDialog.tsx
+++ b/src/renderer/src/pages/NewTaskDialog.tsx
@@ -1,8 +1,8 @@
 import type { FormEvent } from "react";
 import { Dialog } from "../shared/Dialog";
 import { Field } from "../shared/ui";
-import type { AppSnapshot, RiskLevel, TaskPriority } from "../../../shared/domain";
-import { RISK_LEVEL, TASK_PRIORITY, TASK_STATUS } from "../../../shared/domain";
+import type { AppSnapshot, RiskLevel, TaskPriority, WritingMode } from "../../../shared/domain";
+import { RISK_LEVEL, TASK_PRIORITY, TASK_STATUS, WRITING_MODE } from "../../../shared/domain";
 import type { SnapshotActions } from "../app/useSnapshot";
 import { t } from "../i18n/i18n";
 
@@ -18,6 +18,12 @@ const PRIORITY_OPTIONS: ReadonlyArray<{ value: TaskPriority; label: string }> =
   { value: TASK_PRIORITY.HIGH, label: t("High") },
 ];
 
+const WRITING_OPTIONS: ReadonlyArray<{ value: WritingMode; label: string }> = [
+  { value: WRITING_MODE.CONVERSATIONAL, label: t("Conversational (house style)") },
+  { value: WRITING_MODE.TECHNICAL, label: t("Technical spec") },
+  { value: WRITING_MODE.STRUCTURED, label: t("Structured output") },
+];
+
 function value(form: FormData, key: string): string {
   return String(form.get(key) ?? "").trim();
 }
@@ -59,6 +65,7 @@ export function NewTaskDialog({
       workspaceId: optional(form, "workspaceId"),
       priority: value(form, "priority") as TaskPriority,
       requiresFilesystem: form.get("requiresFilesystem") === "on",
+      writingMode: value(form, "writingMode") as WritingMode,
     })).then((result) => {
       if (result) onClose();
     });
@@ -102,6 +109,11 @@ export function NewTaskDialog({
           {PRIORITY_OPTIONS.map((option) => <option key={option.value} value={option.value}>{option.label}</option>)}
         </select>
       </Field>
+      <Field label={t("Writing")}>
+        <select className="input" name="writingMode" defaultValue={WRITING_MODE.CONVERSATIONAL}>
+          {WRITING_OPTIONS.map((option) => <option key={option.value} value={option.value}>{option.label}</option>)}
+        </select>
+      </Field>
       <label className="checkbox-row">
         <input type="checkbox" name="requiresFilesystem" /> {t("Requires workspace access")}
       </label>
diff --git a/src/shared/commands/organization.ts b/src/shared/commands/organization.ts
index 940e314b..fc105ba9 100644
--- a/src/shared/commands/organization.ts
+++ b/src/shared/commands/organization.ts
@@ -1,4 +1,4 @@
-import type { ApprovalState, IdentitySource, PrincipalType, RiskLevel, RoleKey, TaskPriority, TaskStatus, UiLanguage, UiTheme } from "../domain";
+import type { ApprovalState, IdentitySource, PrincipalType, RiskLevel, RoleKey, TaskPriority, TaskStatus, UiLanguage, UiTheme, WritingMode } from "../domain";
 
 export interface SetActiveOrganizationInput {
   orgId: string;
@@ -86,6 +86,8 @@ export interface CreateTaskInput {
   workspaceId: string | null;
   priority: TaskPriority;
   requiresFilesystem: boolean;
+  /** Defaults to conversational. */
+  writingMode?: WritingMode;
   /** Provenance: 'chat_wake' for mention-wake vehicles, 'goal_review' for CEO goal checkpoints, omitted for plain work. */
   origin?: "chat_wake" | "goal_review";
 }
diff --git a/src/shared/commands/skills.ts b/src/shared/commands/skills.ts
index 7acd7ce8..53f1a54a 100644
--- a/src/shared/commands/skills.ts
+++ b/src/shared/commands/skills.ts
@@ -25,6 +25,8 @@ export interface ResolveAgentSkillsInput {
   taskText: string;
   /** The run's provider and model, matched against each skill's compatible_models. */
   runModel: { providerKey: string; model: string | null };
+  /** False on technical and structured tasks, which skip the house-style skill. */
+  houseStyle: boolean;
 }
 
 export interface RunSkillTestsInput {
diff --git a/src/shared/domain.ts b/src/shared/domain.ts
index 58cce05c..e344a9f2 100644
--- a/src/shared/domain.ts
+++ b/src/shared/domain.ts
@@ -19,11 +19,14 @@ export const TASK_STATUS = { BACKLOG: "backlog", IN_PROGRESS: "in_progress", REV
 export const APPROVAL_STATE = { PENDING: "pending", APPROVED: "approved", DECLINED: "declined" } as const;
 export const RISK_LEVEL = { LOW: "low", MEDIUM: "medium", HIGH: "high" } as const;
 export const TASK_PRIORITY = { LOW: "low", NORMAL: "normal", HIGH: "high" } as const;
+/** How a task's output should read: conversational prose carries house style; technical and structured do not. */
+export const WRITING_MODE = { CONVERSATIONAL: "conversational", TECHNICAL: "technical", STRUCTURED: "structured" } as const;
 export const PROVIDER_AUTH_TYPE = { API_KEY: "api_key", OAUTH_PKCE: "oauth_pkce", ACCOUNT_SUBSCRIPTION: "account_subscription", CLOUD: "cloud" } as const;
 export const SOCIAL_PLATFORM = { X: "x", LINKEDIN: "linkedin", YOUTUBE: "youtube", INSTAGRAM: "instagram" } as const;
 export const FILE_SCAN_STATE = { APPROVED: "approved", BLOCKED: "blocked" } as const;
 
 export type ValueOf<T> = T[keyof T];
+export type WritingMode = ValueOf<typeof WRITING_MODE>;
 export type TaskStatus = ValueOf<typeof TASK_STATUS>;
 export type ApprovalState = ValueOf<typeof APPROVAL_STATE>;
 export type RiskLevel = ValueOf<typeof RISK_LEVEL>;
@@ -94,6 +97,7 @@ export interface TaskRecord {
   priority: TaskPriority;
   parentTaskId: string | null;
   requiresFilesystem: boolean;
+  writingMode: WritingMode;
   createdAt: string;
   updatedAt: string;
 }
diff --git a/tests/integration/collaboration-flow.test.ts b/tests/integration/collaboration-flow.test.ts
index 571f9288..36ca08fe 100644
--- a/tests/integration/collaboration-flow.test.ts
+++ b/tests/integration/collaboration-flow.test.ts
@@ -98,7 +98,7 @@ describe("collaboration integration flow", () => {
       revisionId = skills.importDirectory({ orgId, directoryPath: createSkillDirectory(), versionSemver: "1.0.0" });
       skillId = (connection.db.prepare("select skill_id from skill_revisions where id = ?").get(revisionId) as { skill_id: string }).skill_id;
       skills.bind({ orgId, agentId, skillId, revisionId });
-      skills.resolveRuntimeSnapshot({ orgId, agentId, runId: `run_${randomUUID().replaceAll("-", "")}`, maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } });
+      skills.resolveRuntimeSnapshot({ orgId, agentId, runId: `run_${randomUUID().replaceAll("-", "")}`, maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true });
       suiteId = (connection.db.prepare("select id from eval_suites where org_id = ? and key = ?")
         .get(orgId, EVAL_SUITE_KEY.INTEGRATION) as { id: string }).id;
       evalRunId = sdlc.runEvalSuite({ orgId, suiteId });
diff --git a/tests/unit/builtin-skills.test.ts b/tests/unit/builtin-skills.test.ts
index 362b112e..75ed9a20 100644
--- a/tests/unit/builtin-skills.test.ts
+++ b/tests/unit/builtin-skills.test.ts
@@ -171,7 +171,7 @@ describe("built-in skills", () => {
       h.skills.bind({ orgId: h.orgId, agentId, skillId: skill.id, revisionId: skill.revision_id });
     });
     const prompt = (runId: string) => {
-      const id = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+      const id = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
       return (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(id) as { compiled_prompt: string }).compiled_prompt;
     };
     expect(prompt("run_before")).toContain("# Skill: Backend Architect");
@@ -265,7 +265,7 @@ describe("built-in skills", () => {
     expect(hired).toContain("Unknown skills skipped: no-such-skill");
 
     const danaId = (h.connection.db.prepare("select id from agents where org_id = ? and name = 'Dana Lee'").get(h.orgId) as { id: string }).id;
-    const danaSnapshot = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId: danaId, runId: "run_dana", maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+    const danaSnapshot = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId: danaId, runId: "run_dana", maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
     const danaPrompt = (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(danaSnapshot) as { compiled_prompt: string }).compiled_prompt;
     expect(danaPrompt.indexOf("# Skill: humanizer")).toBe(0);
     expect(danaPrompt).toContain("# Skill: Backend Architect");
@@ -274,12 +274,19 @@ describe("built-in skills", () => {
     expect(danaPrompt.length).toBeLessThan(SKILL_TOKENS * 3 + 5_000);
 
     // The CEO carries humanizer too - forced by resolution, not by binding.
-    expect(h.skills.hasRuntimeSkills(h.orgId, ceoId)).toBe(true);
-    const ceoSnapshot = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId: ceoId, runId: "run_ceo", maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+    expect(h.skills.hasRuntimeSkills(h.orgId, ceoId, true)).toBe(true);
+    const ceoSnapshot = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId: ceoId, runId: "run_ceo", maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
     const ceoPrompt = (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(ceoSnapshot) as { compiled_prompt: string }).compiled_prompt;
     expect(ceoPrompt).toContain("# Skill: humanizer");
     expect(ceoPrompt).not.toContain("# Skill: Backend Architect");
 
+    // Technical and structured work drops house style; a CEO without grants then carries nothing.
+    expect(h.skills.hasRuntimeSkills(h.orgId, ceoId, false)).toBe(false);
+    const technicalSnapshot = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId: danaId, runId: "run_dana_spec", maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: false }));
+    const technicalPrompt = (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(technicalSnapshot) as { compiled_prompt: string }).compiled_prompt;
+    expect(technicalPrompt).not.toContain("# Skill: humanizer");
+    expect(technicalPrompt.indexOf("# Skill: Backend Architect")).toBe(0);
+
     // list_skills shows descriptions and marks the house-style skill.
     const listing = dispatchAgentTool(deps, ceoCtx, { id: "call_2", name: "list_skills", arguments: {} });
     expect(listing).toContain("humanizer (humanizer)");
@@ -300,7 +307,7 @@ describe("built-in skills", () => {
       });
     });
     const promptFor = (runId: string) => {
-      const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+      const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens: SKILL_TOKENS, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
       return (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(snapshotId) as { compiled_prompt: string }).compiled_prompt;
     };
 
@@ -346,7 +353,7 @@ describe("built-in skills", () => {
         modelProviderId: null, modelId: null, budgetCents: 1000, managerAgentId: null,
       });
     });
-    const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId: "run_tiny", maxTokens: 10, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+    const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId: "run_tiny", maxTokens: 10, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
     const prompt = (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(snapshotId) as { compiled_prompt: string }).compiled_prompt;
     expect(prompt).not.toContain("# Skill:");
     expect(prompt).toContain("# Skills omitted for size");
@@ -373,7 +380,7 @@ describe("built-in skills", () => {
       bindSkillSlugs({ db: h.connection.db, organization: h.organization, chat: new ChatService(h.connection.db) }, h.orgId, agentId, ["marketing-growth-hacker", "engineering-backend-architect"]);
     });
     const compile = (runId: string, maxTokens: number, taskText: string) => {
-      const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens, taskText, runModel: { providerKey: "openai", model: "gpt-5.4" } }));
+      const snapshotId = h.connection.transaction(() => h.skills.resolveRuntimeSnapshot({ orgId: h.orgId, agentId, runId, maxTokens, taskText, runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true }));
       return (h.connection.db.prepare("select compiled_prompt from skill_runtime_snapshots where id = ?").get(snapshotId) as { compiled_prompt: string }).compiled_prompt;
     };
     const parts = compile("run_full", 1_000_000, "").split("\n\n---\n\n");
diff --git a/tests/unit/domain-services.test.ts b/tests/unit/domain-services.test.ts
index 7c91d12e..0aea20cc 100644
--- a/tests/unit/domain-services.test.ts
+++ b/tests/unit/domain-services.test.ts
@@ -24,7 +24,7 @@ describe("domain services", () => {
     const connection = createConnection();
 
     const rows = connection.db.prepare("select version from schema_migrations order by version asc").all() as Array<{ version: number }>;
-    expect(rows.map((row) => row.version)).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65]);
+    expect(rows.map((row) => row.version)).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66]);
     connection.close();
   });
 
@@ -186,7 +186,7 @@ describe("domain services", () => {
       skills.bind({ orgId, agentId, skillId: skill.id, revisionId });
       rmSync(skillDir, { recursive: true, force: true });
       skills.runTests({ orgId, revisionId });
-      skills.resolveRuntimeSnapshot({ orgId, agentId, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } });
+      skills.resolveRuntimeSnapshot({ orgId, agentId, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true });
     });
 
     // Catalogue metadata ships in the snapshot; skill internals stay in the
@@ -247,10 +247,10 @@ describe("domain services", () => {
         .get(orgA, "review-routes") as { id: string }).id;
       expect(() => skills.bind({ orgId: orgA, agentId: agentB, skillId, revisionId })).toThrow("Agent was not found.");
       skills.bind({ orgId: orgA, agentId: agentA, skillId, revisionId });
-      const firstResolve = skills.resolveRuntimeSnapshot({ orgId: orgA, agentId: agentA, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } });
+      const firstResolve = skills.resolveRuntimeSnapshot({ orgId: orgA, agentId: agentA, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true });
       // Idempotent per run: a recovered run reuses its frozen snapshot
       // instead of failing on the uniqueness guard.
-      expect(skills.resolveRuntimeSnapshot({ orgId: orgA, agentId: agentA, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" } })).toBe(firstResolve);
+      expect(skills.resolveRuntimeSnapshot({ orgId: orgA, agentId: agentA, runId: "run-review-1", maxTokens: 44_800, taskText: "", runModel: { providerKey: "openai", model: "gpt-5.4" }, houseStyle: true })).toBe(firstResolve);
       expect(connection.db.prepare("select count(*) as n from skill_runtime_snapshots where run_id = 'run-review-1'").get())
         .toEqual({ n: 1 });
     });
diff --git a/tests/unit/skill-compatibility.test.ts b/tests/unit/skill-compatibility.test.ts
index 3ccd9844..0ce8b89c 100644
--- a/tests/unit/skill-compatibility.test.ts
+++ b/tests/unit/skill-compatibility.test.ts
@@ -42,7 +42,7 @@ describe("skill compatibility", () => {
       skills.bind({ orgId, agentId, skillId: skill.id, revisionId });
     });
     const prompt = (runId: string, providerKey: string, model: string) => {
-      const id = connection.transaction(() => skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens: 40_000, taskText: "", runModel: { providerKey, model } }));
+      const id = connection.transaction(() => skills.resolveRuntimeSnapshot({ orgId, agentId, runId, maxTokens: 40_000, taskText: "", runModel: { providerKey, model }, houseStyle: true }));
       return connection.db.prepare("select compiled_prompt, source_revision_ids from skill_runtime_snapshots where id = ?").get(id) as { compiled_prompt: string; source_revision_ids: string };
     };
 
diff --git a/tests/unit/skill-grants.test.ts b/tests/unit/skill-grants.test.ts
index 695286a8..2760e1b4 100644
--- a/tests/unit/skill-grants.test.ts
+++ b/tests/unit/skill-grants.test.ts
@@ -7,6 +7,7 @@ import { OrganizationService } from "../../src/main/services/organization-servic
 import { ChatService } from "../../src/main/services/chat-service";
 import { SkillService } from "../../src/main/services/skill-service";
 import { AGENT_TOOLS, dispatchAgentTool, type AgentToolContext } from "../../src/main/services/agent-tools";
+import { writingModeLines } from "../../src/main/services/task-prompts";
 
 function call(name: string, args: Record<string, unknown>) {
   return { id: `call_${randomUUID()}`, name, arguments: args };
@@ -75,6 +76,21 @@ function importSkill(h: Harness, name: string, slug: string): void {
 }
 
 describe("skill grants", () => {
+  test("create_task records the writing mode, which decides house style and the writing rule", () => {
+    const h = harness();
+    const created = dispatchAgentTool(h.deps, h.ceoCtx, call("create_task", { title: "API spec", description: "Write the spec.", writing_mode: "technical" }));
+    const taskId = /task_id=(tsk_\w+)/.exec(created)![1];
+    expect(h.connection.db.prepare("select writing_mode from tasks where id = ?").get(taskId)).toEqual({ writing_mode: "technical" });
+    const plain = dispatchAgentTool(h.deps, h.ceoCtx, call("create_task", { title: "Chat", description: "Say hi." }));
+    expect(h.connection.db.prepare("select writing_mode from tasks where id = ?").get(/task_id=(tsk_\w+)/.exec(plain)![1])).toEqual({ writing_mode: "conversational" });
+    expect(dispatchAgentTool(h.deps, h.ceoCtx, call("create_task", { title: "X", description: "Y", writing_mode: "poetic" })))
+      .toBe('ERROR: "writing_mode" must be one of: conversational, technical, structured.');
+    expect(writingModeLines("conversational")).toEqual([]);
+    expect(writingModeLines("technical").join(" ")).toContain("Technical writing");
+    expect(writingModeLines("structured").join(" ")).toContain("Structured output");
+    h.connection.close();
+  });
+
   test("the CEO runs only with granted skills, as the tool text says, and can grant itself", () => {
     const h = harness();
     importSkill(h, "Release Gate", "release-gate");
@@ -82,10 +98,10 @@ describe("skill grants", () => {
     expect(listSkills?.description).not.toContain("every skill automatically");
     expect(listSkills?.description).toContain("the CEO included");
     const skills = new SkillService(h.connection.db, "");
-    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId)).toBe(false);
+    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId, true)).toBe(false);
     expect(dispatchAgentTool(h.deps, h.ceoCtx, call("grant_skill", { agent_name: "CEO", skill: "release-gate" })))
       .toBe("CEO now has the Release Gate skill; it joins their next run.");
-    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId)).toBe(true);
+    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId, true)).toBe(true);
     h.connection.close();
   });
 
@@ -100,11 +116,11 @@ describe("skill grants", () => {
     expect(listing).toContain("Release Gate (release-gate): granted to Dana");
 
     const skills = new SkillService(h.connection.db, "");
-    expect(skills.hasRuntimeSkills(h.orgId, h.danaId)).toBe(true);
+    expect(skills.hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(true);
 
     const revoked = dispatchAgentTool(h.deps, h.ceoCtx, call("revoke_skill", { agent_name: "Dana", skill: "release-gate" }));
     expect(revoked).toContain("no longer has the Release Gate skill");
-    expect(skills.hasRuntimeSkills(h.orgId, h.danaId)).toBe(false);
+    expect(skills.hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(false);
   });
 
   test("staff cannot hand out skills", () => {
@@ -112,7 +128,7 @@ describe("skill grants", () => {
     importSkill(h, "Release Gate", "release-gate");
     const denied = dispatchAgentTool(h.deps, h.danaCtx, call("grant_skill", { agent_name: "Dana", skill: "release-gate" }));
     expect(denied).toContain("ERROR");
-    expect(new SkillService(h.connection.db, "").hasRuntimeSkills(h.orgId, h.danaId)).toBe(false);
+    expect(new SkillService(h.connection.db, "").hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(false);
   });
 
   test("the humanizer house-style skill reaches every agent without bindings and cannot be revoked", () => {
@@ -120,18 +136,18 @@ describe("skill grants", () => {
     const skills = new SkillService(h.connection.db, "");
     // A non-forced skill grants nothing on its own - not even to the CEO.
     importSkill(h, "Release Gate", "release-gate");
-    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId)).toBe(false);
-    expect(skills.hasRuntimeSkills(h.orgId, h.danaId)).toBe(false);
+    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId, true)).toBe(false);
+    expect(skills.hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(false);
     // Once the forced skill exists in the catalogue, everyone carries it.
     importSkill(h, "humanizer", "humanizer");
-    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId)).toBe(true);
-    expect(skills.hasRuntimeSkills(h.orgId, h.danaId)).toBe(true);
+    expect(skills.hasRuntimeSkills(h.orgId, h.ceoId, true)).toBe(true);
+    expect(skills.hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(true);
     // House style is not revocable, and granting it is a no-op with feedback.
     const revoked = dispatchAgentTool(h.deps, h.ceoCtx, call("revoke_skill", { agent_name: "Dana", skill: "humanizer" }));
     expect(revoked).toContain("ERROR");
     expect(revoked).toContain("house style");
     const granted = dispatchAgentTool(h.deps, h.ceoCtx, call("grant_skill", { agent_name: "Dana", skill: "humanizer" }));
     expect(granted).toContain("automatically");
-    expect(skills.hasRuntimeSkills(h.orgId, h.danaId)).toBe(true);
+    expect(skills.hasRuntimeSkills(h.orgId, h.danaId, true)).toBe(true);
   });
 });