diff --git a/assets/oh-my-opencode.schema.json b/assets/oh-my-opencode.schema.json
index 0d20b75b5..27134431b 100644
--- a/assets/oh-my-opencode.schema.json
+++ b/assets/oh-my-opencode.schema.json
@@ -2808,6 +2808,50 @@
           "minimum": 20
         }
       }
+    },
+    "sisyphus": {
+      "type": "object",
+      "properties": {
+        "tasks": {
+          "type": "object",
+          "properties": {
+            "enabled": {
+              "default": false,
+              "type": "boolean"
+            },
+            "storage_path": {
+              "default": ".sisyphus/tasks",
+              "type": "string"
+            },
+            "claude_code_compat": {
+              "default": false,
+              "type": "boolean"
+            }
+          }
+        },
+        "swarm": {
+          "type": "object",
+          "properties": {
+            "enabled": {
+              "default": false,
+              "type": "boolean"
+            },
+            "storage_path": {
+              "default": ".sisyphus/teams",
+              "type": "string"
+            },
+            "ui_mode": {
+              "default": "toast",
+              "type": "string",
+              "enum": [
+                "toast",
+                "tmux",
+                "both"
+              ]
+            }
+          }
+        }
+      }
     }
   }
 }
\ No newline at end of file
diff --git a/src/config/schema.ts b/src/config/schema.ts
index 08e5a1f2e..3c9ab7b5e 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -339,6 +339,29 @@ export const TmuxConfigSchema = z.object({
   main_pane_min_width: z.number().min(40).default(120),
   agent_pane_min_width: z.number().min(20).default(40),
 })
+
+export const SisyphusTasksConfigSchema = z.object({
+  /** Enable Sisyphus Tasks system (default: false) */
+  enabled: z.boolean().default(false),
+  /** Storage path for tasks (default: .sisyphus/tasks) */
+  storage_path: z.string().default(".sisyphus/tasks"),
+  /** Enable Claude Code path compatibility mode */
+  claude_code_compat: z.boolean().default(false),
+})
+
+export const SisyphusSwarmConfigSchema = z.object({
+  /** Enable Sisyphus Swarm system (default: false) */
+  enabled: z.boolean().default(false),
+  /** Storage path for teams (default: .sisyphus/teams) */
+  storage_path: z.string().default(".sisyphus/teams"),
+  /** UI mode: toast notifications, tmux panes, or both */
+  ui_mode: z.enum(["toast", "tmux", "both"]).default("toast"),
+})
+
+export const SisyphusConfigSchema = z.object({
+  tasks: SisyphusTasksConfigSchema.optional(),
+  swarm: SisyphusSwarmConfigSchema.optional(),
+})
 export const OhMyOpenCodeConfigSchema = z.object({
   $schema: z.string().optional(),
   disabled_mcps: z.array(AnyMcpNameSchema).optional(),
@@ -360,6 +383,7 @@ export const OhMyOpenCodeConfigSchema = z.object({
   git_master: GitMasterConfigSchema.optional(),
   browser_automation_engine: BrowserAutomationConfigSchema.optional(),
   tmux: TmuxConfigSchema.optional(),
+  sisyphus: SisyphusConfigSchema.optional(),
 })
 
 export type OhMyOpenCodeConfig = z.infer<typeof OhMyOpenCodeConfigSchema>
@@ -386,5 +410,8 @@ export type BrowserAutomationProvider = z.infer<typeof BrowserAutomationProvider
 export type BrowserAutomationConfig = z.infer<typeof BrowserAutomationConfigSchema>
 export type TmuxConfig = z.infer<typeof TmuxConfigSchema>
 export type TmuxLayout = z.infer<typeof TmuxLayoutSchema>
+export type SisyphusTasksConfig = z.infer<typeof SisyphusTasksConfigSchema>
+export type SisyphusSwarmConfig = z.infer<typeof SisyphusSwarmConfigSchema>
+export type SisyphusConfig = z.infer<typeof SisyphusConfigSchema>
 
 export { AnyMcpNameSchema, type AnyMcpName, McpNameSchema, type McpName } from "../mcp/types"
diff --git a/src/features/sisyphus-swarm/mailbox/types.test.ts b/src/features/sisyphus-swarm/mailbox/types.test.ts
new file mode 100644
index 000000000..a3d426d90
--- /dev/null
+++ b/src/features/sisyphus-swarm/mailbox/types.test.ts
@@ -0,0 +1,112 @@
+import { describe, it, expect } from "bun:test"
+import {
+  MailboxMessageSchema,
+  PermissionRequestSchema,
+  PermissionResponseSchema,
+  ShutdownRequestSchema,
+  TaskAssignmentSchema,
+  JoinRequestSchema,
+  ProtocolMessageSchema,
+} from "./types"
+
+describe("MailboxMessageSchema", () => {
+  //#given a valid mailbox message
+  //#when parsing
+  //#then it should succeed
+  it("parses valid message", () => {
+    const msg = {
+      from: "agent-001",
+      text: '{"type":"idle_notification"}',
+      timestamp: "2026-01-27T10:00:00Z",
+      read: false,
+    }
+    expect(MailboxMessageSchema.safeParse(msg).success).toBe(true)
+  })
+
+  //#given a message with optional color
+  //#when parsing
+  //#then it should succeed
+  it("parses message with color", () => {
+    const msg = {
+      from: "agent-001",
+      text: "{}",
+      timestamp: "2026-01-27T10:00:00Z",
+      color: "blue",
+      read: true,
+    }
+    expect(MailboxMessageSchema.safeParse(msg).success).toBe(true)
+  })
+})
+
+describe("ProtocolMessageSchema", () => {
+  //#given permission_request message
+  //#when parsing
+  //#then it should succeed
+  it("parses permission_request", () => {
+    const msg = {
+      type: "permission_request",
+      requestId: "req-123",
+      toolName: "Bash",
+      input: { command: "rm -rf /" },
+      agentId: "agent-001",
+      timestamp: Date.now(),
+    }
+    expect(PermissionRequestSchema.safeParse(msg).success).toBe(true)
+  })
+
+  //#given permission_response message
+  //#when parsing
+  //#then it should succeed
+  it("parses permission_response", () => {
+    const approved = {
+      type: "permission_response",
+      requestId: "req-123",
+      decision: "approved",
+      updatedInput: { command: "ls" },
+    }
+    expect(PermissionResponseSchema.safeParse(approved).success).toBe(true)
+
+    const rejected = {
+      type: "permission_response",
+      requestId: "req-123",
+      decision: "rejected",
+      feedback: "Too dangerous",
+    }
+    expect(PermissionResponseSchema.safeParse(rejected).success).toBe(true)
+  })
+
+  //#given shutdown_request message
+  //#when parsing
+  //#then it should succeed
+  it("parses shutdown messages", () => {
+    const request = { type: "shutdown_request" }
+    expect(ShutdownRequestSchema.safeParse(request).success).toBe(true)
+  })
+
+  //#given task_assignment message
+  //#when parsing
+  //#then it should succeed
+  it("parses task_assignment", () => {
+    const msg = {
+      type: "task_assignment",
+      taskId: "1",
+      subject: "Fix bug",
+      description: "Fix the auth bug",
+      assignedBy: "team-lead",
+      timestamp: Date.now(),
+    }
+    expect(TaskAssignmentSchema.safeParse(msg).success).toBe(true)
+  })
+
+  //#given join_request message
+  //#when parsing
+  //#then it should succeed
+  it("parses join_request", () => {
+    const msg = {
+      type: "join_request",
+      agentName: "new-agent",
+      sessionId: "sess-123",
+    }
+    expect(JoinRequestSchema.safeParse(msg).success).toBe(true)
+  })
+})
diff --git a/src/features/sisyphus-swarm/mailbox/types.ts b/src/features/sisyphus-swarm/mailbox/types.ts
new file mode 100644
index 000000000..ae222818b
--- /dev/null
+++ b/src/features/sisyphus-swarm/mailbox/types.ts
@@ -0,0 +1,153 @@
+import { z } from "zod"
+
+export const MailboxMessageSchema = z.object({
+  from: z.string(),
+  text: z.string(),
+  timestamp: z.string(),
+  color: z.string().optional(),
+  read: z.boolean(),
+})
+
+export type MailboxMessage = z.infer<typeof MailboxMessageSchema>
+
+export const PermissionRequestSchema = z.object({
+  type: z.literal("permission_request"),
+  requestId: z.string(),
+  toolName: z.string(),
+  input: z.unknown(),
+  agentId: z.string(),
+  timestamp: z.number(),
+})
+
+export type PermissionRequest = z.infer<typeof PermissionRequestSchema>
+
+export const PermissionResponseSchema = z.object({
+  type: z.literal("permission_response"),
+  requestId: z.string(),
+  decision: z.enum(["approved", "rejected"]),
+  updatedInput: z.unknown().optional(),
+  feedback: z.string().optional(),
+  permissionUpdates: z.unknown().optional(),
+})
+
+export type PermissionResponse = z.infer<typeof PermissionResponseSchema>
+
+export const ShutdownRequestSchema = z.object({
+  type: z.literal("shutdown_request"),
+})
+
+export type ShutdownRequest = z.infer<typeof ShutdownRequestSchema>
+
+export const ShutdownApprovedSchema = z.object({
+  type: z.literal("shutdown_approved"),
+})
+
+export type ShutdownApproved = z.infer<typeof ShutdownApprovedSchema>
+
+export const ShutdownRejectedSchema = z.object({
+  type: z.literal("shutdown_rejected"),
+  reason: z.string().optional(),
+})
+
+export type ShutdownRejected = z.infer<typeof ShutdownRejectedSchema>
+
+export const TaskAssignmentSchema = z.object({
+  type: z.literal("task_assignment"),
+  taskId: z.string(),
+  subject: z.string(),
+  description: z.string(),
+  assignedBy: z.string(),
+  timestamp: z.number(),
+})
+
+export type TaskAssignment = z.infer<typeof TaskAssignmentSchema>
+
+export const TaskCompletedSchema = z.object({
+  type: z.literal("task_completed"),
+  taskId: z.string(),
+  agentId: z.string(),
+  timestamp: z.number(),
+})
+
+export type TaskCompleted = z.infer<typeof TaskCompletedSchema>
+
+export const IdleNotificationSchema = z.object({
+  type: z.literal("idle_notification"),
+})
+
+export type IdleNotification = z.infer<typeof IdleNotificationSchema>
+
+export const JoinRequestSchema = z.object({
+  type: z.literal("join_request"),
+  agentName: z.string(),
+  sessionId: z.string(),
+})
+
+export type JoinRequest = z.infer<typeof JoinRequestSchema>
+
+export const JoinApprovedSchema = z.object({
+  type: z.literal("join_approved"),
+  agentName: z.string(),
+  teamName: z.string(),
+})
+
+export type JoinApproved = z.infer<typeof JoinApprovedSchema>
+
+export const JoinRejectedSchema = z.object({
+  type: z.literal("join_rejected"),
+  reason: z.string().optional(),
+})
+
+export type JoinRejected = z.infer<typeof JoinRejectedSchema>
+
+export const PlanApprovalRequestSchema = z.object({
+  type: z.literal("plan_approval_request"),
+  requestId: z.string(),
+  plan: z.string(),
+  agentId: z.string(),
+})
+
+export type PlanApprovalRequest = z.infer<typeof PlanApprovalRequestSchema>
+
+export const PlanApprovalResponseSchema = z.object({
+  type: z.literal("plan_approval_response"),
+  requestId: z.string(),
+  decision: z.enum(["approved", "rejected"]),
+  feedback: z.string().optional(),
+})
+
+export type PlanApprovalResponse = z.infer<typeof PlanApprovalResponseSchema>
+
+export const ModeSetRequestSchema = z.object({
+  type: z.literal("mode_set_request"),
+  mode: z.enum(["acceptEdits", "bypassPermissions", "default", "delegate", "dontAsk", "plan"]),
+})
+
+export type ModeSetRequest = z.infer<typeof ModeSetRequestSchema>
+
+export const TeamPermissionUpdateSchema = z.object({
+  type: z.literal("team_permission_update"),
+  permissions: z.record(z.string(), z.unknown()),
+})
+
+export type TeamPermissionUpdate = z.infer<typeof TeamPermissionUpdateSchema>
+
+export const ProtocolMessageSchema = z.discriminatedUnion("type", [
+  PermissionRequestSchema,
+  PermissionResponseSchema,
+  ShutdownRequestSchema,
+  ShutdownApprovedSchema,
+  ShutdownRejectedSchema,
+  TaskAssignmentSchema,
+  TaskCompletedSchema,
+  IdleNotificationSchema,
+  JoinRequestSchema,
+  JoinApprovedSchema,
+  JoinRejectedSchema,
+  PlanApprovalRequestSchema,
+  PlanApprovalResponseSchema,
+  ModeSetRequestSchema,
+  TeamPermissionUpdateSchema,
+])
+
+export type ProtocolMessage = z.infer<typeof ProtocolMessageSchema>
diff --git a/src/features/sisyphus-tasks/storage.test.ts b/src/features/sisyphus-tasks/storage.test.ts
new file mode 100644
index 000000000..888b35f8d
--- /dev/null
+++ b/src/features/sisyphus-tasks/storage.test.ts
@@ -0,0 +1,178 @@
+import { describe, it, expect, beforeEach, afterEach } from "bun:test"
+import { join } from "path"
+import { mkdirSync, rmSync, existsSync, writeFileSync, readFileSync } from "fs"
+import { z } from "zod"
+import {
+  getTaskDir,
+  getTaskPath,
+  getTeamDir,
+  getInboxPath,
+  ensureDir,
+  readJsonSafe,
+  writeJsonAtomic,
+} from "./storage"
+
+const TEST_DIR = join(import.meta.dirname, ".test-storage")
+
+describe("Storage Utilities", () => {
+  beforeEach(() => {
+    rmSync(TEST_DIR, { recursive: true, force: true })
+    mkdirSync(TEST_DIR, { recursive: true })
+  })
+
+  afterEach(() => {
+    rmSync(TEST_DIR, { recursive: true, force: true })
+  })
+
+  describe("getTaskDir", () => {
+    //#given default config (no claude_code_compat)
+    //#when getting task directory
+    //#then it should return .sisyphus/tasks/{listId}
+    it("returns sisyphus path by default", () => {
+      const config = { sisyphus: { tasks: { storage_path: ".sisyphus/tasks" } } }
+      const result = getTaskDir("list-123", config as any)
+      expect(result).toContain(".sisyphus/tasks/list-123")
+    })
+
+    //#given claude_code_compat enabled
+    //#when getting task directory
+    //#then it should return Claude Code path
+    it("returns claude code path when compat enabled", () => {
+      const config = {
+        sisyphus: {
+          tasks: {
+            storage_path: ".sisyphus/tasks",
+            claude_code_compat: true,
+          },
+        },
+      }
+      const result = getTaskDir("list-123", config as any)
+      expect(result).toContain(".cache/claude-code/tasks/list-123")
+    })
+  })
+
+  describe("getTaskPath", () => {
+    //#given list and task IDs
+    //#when getting task path
+    //#then it should return path to task JSON file
+    it("returns path to task JSON", () => {
+      const config = { sisyphus: { tasks: { storage_path: ".sisyphus/tasks" } } }
+      const result = getTaskPath("list-123", "1", config as any)
+      expect(result).toContain("list-123/1.json")
+    })
+  })
+
+  describe("getTeamDir", () => {
+    //#given team name and default config
+    //#when getting team directory
+    //#then it should return .sisyphus/teams/{teamName}
+    it("returns sisyphus team path", () => {
+      const config = { sisyphus: { swarm: { storage_path: ".sisyphus/teams" } } }
+      const result = getTeamDir("my-team", config as any)
+      expect(result).toContain(".sisyphus/teams/my-team")
+    })
+  })
+
+  describe("getInboxPath", () => {
+    //#given team and agent names
+    //#when getting inbox path
+    //#then it should return path to inbox JSON file
+    it("returns path to inbox JSON", () => {
+      const config = { sisyphus: { swarm: { storage_path: ".sisyphus/teams" } } }
+      const result = getInboxPath("my-team", "agent-001", config as any)
+      expect(result).toContain("my-team/inboxes/agent-001.json")
+    })
+  })
+
+  describe("ensureDir", () => {
+    //#given a non-existent directory path
+    //#when calling ensureDir
+    //#then it should create the directory
+    it("creates directory if not exists", () => {
+      const dirPath = join(TEST_DIR, "new-dir", "nested")
+      ensureDir(dirPath)
+      expect(existsSync(dirPath)).toBe(true)
+    })
+
+    //#given an existing directory
+    //#when calling ensureDir
+    //#then it should not throw
+    it("does not throw for existing directory", () => {
+      const dirPath = join(TEST_DIR, "existing")
+      mkdirSync(dirPath, { recursive: true })
+      expect(() => ensureDir(dirPath)).not.toThrow()
+    })
+  })
+
+  describe("readJsonSafe", () => {
+    //#given a valid JSON file matching schema
+    //#when reading with readJsonSafe
+    //#then it should return parsed object
+    it("reads and parses valid JSON", () => {
+      const testSchema = z.object({ name: z.string(), value: z.number() })
+      const filePath = join(TEST_DIR, "test.json")
+      writeFileSync(filePath, JSON.stringify({ name: "test", value: 42 }))
+
+      const result = readJsonSafe(filePath, testSchema)
+      expect(result).toEqual({ name: "test", value: 42 })
+    })
+
+    //#given a non-existent file
+    //#when reading with readJsonSafe
+    //#then it should return null
+    it("returns null for non-existent file", () => {
+      const testSchema = z.object({ name: z.string() })
+      const result = readJsonSafe(join(TEST_DIR, "missing.json"), testSchema)
+      expect(result).toBeNull()
+    })
+
+    //#given invalid JSON content
+    //#when reading with readJsonSafe
+    //#then it should return null
+    it("returns null for invalid JSON", () => {
+      const testSchema = z.object({ name: z.string() })
+      const filePath = join(TEST_DIR, "invalid.json")
+      writeFileSync(filePath, "not valid json")
+
+      const result = readJsonSafe(filePath, testSchema)
+      expect(result).toBeNull()
+    })
+
+    //#given JSON that doesn't match schema
+    //#when reading with readJsonSafe
+    //#then it should return null
+    it("returns null for schema mismatch", () => {
+      const testSchema = z.object({ name: z.string(), required: z.number() })
+      const filePath = join(TEST_DIR, "mismatch.json")
+      writeFileSync(filePath, JSON.stringify({ name: "test" }))
+
+      const result = readJsonSafe(filePath, testSchema)
+      expect(result).toBeNull()
+    })
+  })
+
+  describe("writeJsonAtomic", () => {
+    //#given data to write
+    //#when calling writeJsonAtomic
+    //#then it should write to file atomically
+    it("writes JSON atomically", () => {
+      const filePath = join(TEST_DIR, "atomic.json")
+      const data = { key: "value", number: 123 }
+
+      writeJsonAtomic(filePath, data)
+
+      const content = readFileSync(filePath, "utf-8")
+      expect(JSON.parse(content)).toEqual(data)
+    })
+
+    //#given a deeply nested path
+    //#when calling writeJsonAtomic
+    //#then it should create parent directories
+    it("creates parent directories", () => {
+      const filePath = join(TEST_DIR, "deep", "nested", "file.json")
+      writeJsonAtomic(filePath, { test: true })
+
+      expect(existsSync(filePath)).toBe(true)
+    })
+  })
+})
diff --git a/src/features/sisyphus-tasks/storage.ts b/src/features/sisyphus-tasks/storage.ts
new file mode 100644
index 000000000..64c5f01dd
--- /dev/null
+++ b/src/features/sisyphus-tasks/storage.ts
@@ -0,0 +1,82 @@
+import { join, dirname } from "path"
+import { existsSync, mkdirSync, readFileSync, writeFileSync, renameSync, unlinkSync } from "fs"
+import { homedir } from "os"
+import type { z } from "zod"
+import type { OhMyOpenCodeConfig } from "../../config/schema"
+
+export function getTaskDir(listId: string, config: Partial<OhMyOpenCodeConfig>): string {
+  const tasksConfig = config.sisyphus?.tasks
+
+  if (tasksConfig?.claude_code_compat) {
+    return join(homedir(), ".cache", "claude-code", "tasks", listId)
+  }
+
+  const storagePath = tasksConfig?.storage_path ?? ".sisyphus/tasks"
+  return join(process.cwd(), storagePath, listId)
+}
+
+export function getTaskPath(listId: string, taskId: string, config: Partial<OhMyOpenCodeConfig>): string {
+  return join(getTaskDir(listId, config), `${taskId}.json`)
+}
+
+export function getTeamDir(teamName: string, config: Partial<OhMyOpenCodeConfig>): string {
+  const swarmConfig = config.sisyphus?.swarm
+
+  if (swarmConfig?.storage_path?.includes("claude")) {
+    return join(homedir(), ".claude", "teams", teamName)
+  }
+
+  const storagePath = swarmConfig?.storage_path ?? ".sisyphus/teams"
+  return join(process.cwd(), storagePath, teamName)
+}
+
+export function getInboxPath(teamName: string, agentName: string, config: Partial<OhMyOpenCodeConfig>): string {
+  return join(getTeamDir(teamName, config), "inboxes", `${agentName}.json`)
+}
+
+export function ensureDir(dirPath: string): void {
+  if (!existsSync(dirPath)) {
+    mkdirSync(dirPath, { recursive: true })
+  }
+}
+
+export function readJsonSafe<T>(filePath: string, schema: z.ZodType<T>): T | null {
+  try {
+    if (!existsSync(filePath)) {
+      return null
+    }
+
+    const content = readFileSync(filePath, "utf-8")
+    const parsed = JSON.parse(content)
+    const result = schema.safeParse(parsed)
+
+    if (!result.success) {
+      return null
+    }
+
+    return result.data
+  } catch {
+    return null
+  }
+}
+
+export function writeJsonAtomic(filePath: string, data: unknown): void {
+  const dir = dirname(filePath)
+  ensureDir(dir)
+
+  const tempPath = `${filePath}.tmp.${Date.now()}`
+
+  try {
+    writeFileSync(tempPath, JSON.stringify(data, null, 2), "utf-8")
+    renameSync(tempPath, filePath)
+  } catch (error) {
+    try {
+      if (existsSync(tempPath)) {
+        unlinkSync(tempPath)
+      }
+    } catch {
+      // Ignore cleanup errors
+    }
+    throw error
+  }
+}
diff --git a/src/features/sisyphus-tasks/types.test.ts b/src/features/sisyphus-tasks/types.test.ts
new file mode 100644
index 000000000..61ac4f562
--- /dev/null
+++ b/src/features/sisyphus-tasks/types.test.ts
@@ -0,0 +1,82 @@
+import { describe, it, expect } from "bun:test"
+import { TaskSchema, TaskStatusSchema, type Task } from "./types"
+
+describe("TaskSchema", () => {
+  //#given a valid task object
+  //#when parsing with TaskSchema
+  //#then it should succeed
+  it("parses valid task object", () => {
+    const validTask = {
+      id: "1",
+      subject: "Fix authentication bug",
+      description: "Users report 401 errors",
+      status: "pending",
+      blocks: [],
+      blockedBy: [],
+    }
+
+    const result = TaskSchema.safeParse(validTask)
+    expect(result.success).toBe(true)
+  })
+
+  //#given a task with all optional fields
+  //#when parsing with TaskSchema
+  //#then it should succeed
+  it("parses task with optional fields", () => {
+    const taskWithOptionals = {
+      id: "2",
+      subject: "Add unit tests",
+      description: "Write tests for auth module",
+      activeForm: "Adding unit tests",
+      owner: "agent-001",
+      status: "in_progress",
+      blocks: ["3"],
+      blockedBy: ["1"],
+      metadata: { priority: "high", labels: ["bug"] },
+    }
+
+    const result = TaskSchema.safeParse(taskWithOptionals)
+    expect(result.success).toBe(true)
+  })
+
+  //#given an invalid status value
+  //#when parsing with TaskSchema
+  //#then it should fail
+  it("rejects invalid status", () => {
+    const invalidTask = {
+      id: "1",
+      subject: "Test",
+      description: "Test",
+      status: "invalid_status",
+      blocks: [],
+      blockedBy: [],
+    }
+
+    const result = TaskSchema.safeParse(invalidTask)
+    expect(result.success).toBe(false)
+  })
+
+  //#given missing required fields
+  //#when parsing with TaskSchema
+  //#then it should fail
+  it("rejects missing required fields", () => {
+    const invalidTask = {
+      id: "1",
+      // missing subject, description, status, blocks, blockedBy
+    }
+
+    const result = TaskSchema.safeParse(invalidTask)
+    expect(result.success).toBe(false)
+  })
+})
+
+describe("TaskStatusSchema", () => {
+  //#given valid status values
+  //#when parsing
+  //#then all should succeed
+  it("accepts valid statuses", () => {
+    expect(TaskStatusSchema.safeParse("pending").success).toBe(true)
+    expect(TaskStatusSchema.safeParse("in_progress").success).toBe(true)
+    expect(TaskStatusSchema.safeParse("completed").success).toBe(true)
+  })
+})
diff --git a/src/features/sisyphus-tasks/types.ts b/src/features/sisyphus-tasks/types.ts
new file mode 100644
index 000000000..b6349aee8
--- /dev/null
+++ b/src/features/sisyphus-tasks/types.ts
@@ -0,0 +1,41 @@
+import { z } from "zod"
+
+export const TaskStatusSchema = z.enum(["pending", "in_progress", "completed"])
+export type TaskStatus = z.infer<typeof TaskStatusSchema>
+
+export const TaskSchema = z.object({
+  id: z.string(),
+  subject: z.string(),
+  description: z.string(),
+  activeForm: z.string().optional(),
+  owner: z.string().optional(),
+  status: TaskStatusSchema,
+  blocks: z.array(z.string()),
+  blockedBy: z.array(z.string()),
+  metadata: z.record(z.string(), z.unknown()).optional(),
+})
+
+export type Task = z.infer<typeof TaskSchema>
+
+export const TaskCreateInputSchema = z.object({
+  subject: z.string().describe("Task title"),
+  description: z.string().describe("Detailed description"),
+  activeForm: z.string().optional().describe("Text shown when in progress"),
+  metadata: z.record(z.string(), z.unknown()).optional(),
+})
+
+export type TaskCreateInput = z.infer<typeof TaskCreateInputSchema>
+
+export const TaskUpdateInputSchema = z.object({
+  taskId: z.string().describe("Task ID to update"),
+  subject: z.string().optional(),
+  description: z.string().optional(),
+  activeForm: z.string().optional(),
+  status: z.enum(["pending", "in_progress", "completed", "deleted"]).optional(),
+  addBlocks: z.array(z.string()).optional().describe("Task IDs this task will block"),
+  addBlockedBy: z.array(z.string()).optional().describe("Task IDs that block this task"),
+  owner: z.string().optional(),
+  metadata: z.record(z.string(), z.unknown()).optional(),
+})
+
+export type TaskUpdateInput = z.infer<typeof TaskUpdateInputSchema>