無用な後方互換削除

src/__tests__/instructionBuilder.test.ts

@@ -14,20 +14,20 @@ import {
   type InstructionContext,
 } from '../core/workflow/index.js';
 
-// Backward-compatible function wrappers for test readability
-function buildInstruction(step: WorkflowStep, ctx: InstructionContext): string {
+// Function wrappers for test readability
+function buildInstruction(step: WorkflowMovement, ctx: InstructionContext): string {
   return new InstructionBuilder(step, ctx).build();
 }
-function buildReportInstruction(step: WorkflowStep, ctx: ReportInstructionContext): string {
+function buildReportInstruction(step: WorkflowMovement, ctx: ReportInstructionContext): string {
   return new ReportInstructionBuilder(step, ctx).build();
 }
-function buildStatusJudgmentInstruction(step: WorkflowStep, ctx: StatusJudgmentContext): string {
+function buildStatusJudgmentInstruction(step: WorkflowMovement, ctx: StatusJudgmentContext): string {
   return new StatusJudgmentBuilder(step, ctx).build();
 }
-import type { WorkflowStep, WorkflowRule } from '../core/models/index.js';
+import type { WorkflowMovement, WorkflowRule } from '../core/models/index.js';
 
 
-function createMinimalStep(template: string): WorkflowStep {
+function createMinimalStep(template: string): WorkflowMovement {
   return {
     name: 'test-step',
     agent: 'test-agent',

src/__tests__/it-error-recovery.test.ts

@@ -13,7 +13,7 @@ import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import { setMockScenario, resetScenario } from '../infra/mock/index.js';
-import type { WorkflowConfig, WorkflowStep, WorkflowRule } from '../core/models/index.js';
+import type { WorkflowConfig, WorkflowMovement, WorkflowRule } from '../core/models/index.js';
 import { callAiJudge, detectRuleIndex } from '../infra/claude/index.js';
 
 // --- Mocks ---
@@ -59,7 +59,7 @@ function makeRule(condition: string, next: string): WorkflowRule {
   return { condition, next };
 }
 
-function makeMovement(name: string, agentPath: string, rules: WorkflowRule[]): WorkflowStep {
+function makeMovement(name: string, agentPath: string, rules: WorkflowRule[]): WorkflowMovement {
   return {
     name,
     agent: `./agents/${name}.md`,

src/__tests__/it-three-phase-execution.test.ts

@@ -14,7 +14,7 @@ import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import { setMockScenario, resetScenario } from '../infra/mock/index.js';
-import type { WorkflowConfig, WorkflowStep, WorkflowRule } from '../core/models/index.js';
+import type { WorkflowConfig, WorkflowMovement, WorkflowRule } from '../core/models/index.js';
 import { callAiJudge, detectRuleIndex } from '../infra/claude/index.js';
 
 // --- Mocks ---
@@ -89,7 +89,7 @@ function makeMovement(
   agentPath: string,
   rules: WorkflowRule[],
   options: { report?: string | { label: string; path: string }[]; edit?: boolean } = {},
-): WorkflowStep {
+): WorkflowMovement {
   return {
     name,
     agent: './agents/agent.md',

src/__tests__/it-workflow-execution.test.ts

@@ -14,7 +14,7 @@ import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
 import { setMockScenario, resetScenario } from '../infra/mock/index.js';
-import type { WorkflowConfig, WorkflowStep, WorkflowRule } from '../core/models/index.js';
+import type { WorkflowConfig, WorkflowMovement, WorkflowRule } from '../core/models/index.js';
 import { callAiJudge, detectRuleIndex } from '../infra/claude/index.js';
 
 // --- Mocks (minimal — only infrastructure, not core logic) ---
@@ -62,7 +62,7 @@ function makeRule(condition: string, next: string): WorkflowRule {
   return { condition, next };
 }
 
-function makeMovement(name: string, agentPath: string, rules: WorkflowRule[]): WorkflowStep {
+function makeMovement(name: string, agentPath: string, rules: WorkflowRule[]): WorkflowMovement {
   return {
     name,
     agent: `./agents/${name}.md`,

src/__tests__/parallel-and-loader.test.ts

@@ -8,9 +8,9 @@
  */
 
 import { describe, it, expect } from 'vitest';
-import { WorkflowConfigRawSchema, ParallelSubStepRawSchema, WorkflowStepRawSchema } from '../core/models/index.js';
+import { WorkflowConfigRawSchema, ParallelSubMovementRawSchema, WorkflowMovementRawSchema } from '../core/models/index.js';
 
-describe('ParallelSubStepRawSchema', () => {
+describe('ParallelSubMovementRawSchema', () => {
   it('should validate a valid parallel sub-movement', () => {
     const raw = {
       name: 'arch-review',
@@ -18,7 +18,7 @@ describe('ParallelSubStepRawSchema', () => {
       instruction_template: 'Review architecture',
     };
 
-    const result = ParallelSubStepRawSchema.safeParse(raw);
+    const result = ParallelSubMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 
@@ -28,7 +28,7 @@ describe('ParallelSubStepRawSchema', () => {
       instruction_template: 'Do something',
     };
 
-    const result = ParallelSubStepRawSchema.safeParse(raw);
+    const result = ParallelSubMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 
@@ -45,7 +45,7 @@ describe('ParallelSubStepRawSchema', () => {
       pass_previous_response: false,
     };
 
-    const result = ParallelSubStepRawSchema.safeParse(raw);
+    const result = ParallelSubMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
     if (result.success) {
       expect(result.data.agent_name).toBe('Coder');
@@ -65,7 +65,7 @@ describe('ParallelSubStepRawSchema', () => {
       ],
     };
 
-    const result = ParallelSubStepRawSchema.safeParse(raw);
+    const result = ParallelSubMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
     if (result.success) {
       expect(result.data.rules).toHaveLength(2);
@@ -73,7 +73,7 @@ describe('ParallelSubStepRawSchema', () => {
   });
 });
 
-describe('WorkflowStepRawSchema with parallel', () => {
+describe('WorkflowMovementRawSchema with parallel', () => {
   it('should accept a movement with parallel sub-movements (no agent)', () => {
     const raw = {
       name: 'parallel-review',
@@ -86,7 +86,7 @@ describe('WorkflowStepRawSchema with parallel', () => {
       ],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 
@@ -96,7 +96,7 @@ describe('WorkflowStepRawSchema with parallel', () => {
       instruction_template: 'Do something',
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 
@@ -107,7 +107,7 @@ describe('WorkflowStepRawSchema with parallel', () => {
       instruction_template: 'Code something',
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 
@@ -117,7 +117,7 @@ describe('WorkflowStepRawSchema with parallel', () => {
       parallel: [],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 });
@@ -194,7 +194,7 @@ describe('ai() condition in WorkflowRuleSchema', () => {
       ],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
     if (result.success) {
       expect(result.data.rules?.[0].condition).toBe('ai("All reviews approved")');
@@ -212,7 +212,7 @@ describe('ai() condition in WorkflowRuleSchema', () => {
       ],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 });
@@ -299,7 +299,7 @@ describe('all()/any() aggregate condition regex parsing', () => {
   });
 });
 
-describe('all()/any() condition in WorkflowStepRawSchema', () => {
+describe('all()/any() condition in WorkflowMovementRawSchema', () => {
   it('should accept all() condition as a string', () => {
     const raw = {
       name: 'parallel-review',
@@ -312,7 +312,7 @@ describe('all()/any() condition in WorkflowStepRawSchema', () => {
       ],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
     if (result.success) {
       expect(result.data.rules?.[0].condition).toBe('all("approved")');
@@ -333,7 +333,7 @@ describe('all()/any() condition in WorkflowStepRawSchema', () => {
       ],
     };
 
-    const result = WorkflowStepRawSchema.safeParse(raw);
+    const result = WorkflowMovementRawSchema.safeParse(raw);
     expect(result.success).toBe(true);
   });
 });

src/__tests__/workflowLoader.test.ts

@@ -32,7 +32,7 @@ describe('isWorkflowPath', () => {
 
   it('should return true for home directory paths', () => {
     expect(isWorkflowPath('~/workflow.yaml')).toBe(true);
-    expect(isWorkflowPath('~/.takt/workflows/custom.yaml')).toBe(true);
+    expect(isWorkflowPath('~/.takt/pieces/custom.yaml')).toBe(true);
   });
 
   it('should return true for relative paths starting with ./', () => {

src/agents/index.ts

@@ -2,5 +2,5 @@
  * Agents module - exports agent execution utilities
  */
 
-export { AgentRunner, runAgent, runCustomAgent } from './runner.js';
+export { AgentRunner, runAgent } from './runner.js';
 export type { RunAgentOptions, StreamCallback } from './types.js';

src/agents/runner.ts

@@ -16,7 +16,6 @@ import { createLogger } from '../shared/utils/index.js';
 import { loadTemplate } from '../shared/prompts/index.js';
 import type { RunAgentOptions } from './types.js';
 
-// Re-export for backward compatibility
 export type { RunAgentOptions, StreamCallback } from './types.js';
 
 const log = createLogger('runner');
@@ -225,7 +224,7 @@ export class AgentRunner {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level function facade ----
 
 const defaultRunner = new AgentRunner();
 
@@ -236,11 +235,3 @@ export async function runAgent(
 ): Promise<AgentResponse> {
   return defaultRunner.run(agentSpec, task, options);
 }
-
-export async function runCustomAgent(
-  agentConfig: CustomAgentConfig,
-  task: string,
-  options: RunAgentOptions,
-): Promise<AgentResponse> {
-  return defaultRunner.runCustom(agentConfig, task, options);
-}

src/core/models/index.ts

@@ -10,7 +10,6 @@ export type {
   SessionState,
   WorkflowRule,
   WorkflowMovement,
-  WorkflowStep,
   LoopDetectionConfig,
   WorkflowConfig,
   WorkflowState,

src/core/models/schemas.ts

@@ -158,30 +158,15 @@ export const WorkflowMovementRawSchema = z.object({
   parallel: z.array(ParallelSubMovementRawSchema).optional(),
 });
 
-/** @deprecated Use WorkflowMovementRawSchema instead */
-export const WorkflowStepRawSchema = WorkflowMovementRawSchema;
-
-/** @deprecated Use ParallelSubMovementRawSchema instead */
-export const ParallelSubStepRawSchema = ParallelSubMovementRawSchema;
-
-/** Workflow configuration schema - raw YAML format (accepts both `movements` and legacy `steps`) */
+/** Workflow configuration schema - raw YAML format */
 export const WorkflowConfigRawSchema = z.object({
   name: z.string().min(1),
   description: z.string().optional(),
-  /** Preferred key: movements */
-  movements: z.array(WorkflowMovementRawSchema).min(1).optional(),
-  /** @deprecated Use `movements` instead */
-  steps: z.array(WorkflowMovementRawSchema).min(1).optional(),
-  /** Preferred key: initial_movement */
+  movements: z.array(WorkflowMovementRawSchema).min(1),
   initial_movement: z.string().optional(),
-  /** @deprecated Use `initial_movement` instead */
-  initial_step: z.string().optional(),
   max_iterations: z.number().int().positive().optional().default(10),
   answer_agent: z.string().optional(),
-}).refine(
-  (data) => (data.movements && data.movements.length > 0) || (data.steps && data.steps.length > 0),
-  { message: 'Workflow must have at least one movement (use `movements` or legacy `steps` key)' }
-);
+});
 
 /** Custom agent configuration schema */
 export const CustomAgentConfigSchema = z.object({

src/core/models/types.ts

@@ -29,7 +29,6 @@ export type {
   ReportConfig,
   ReportObjectConfig,
   WorkflowMovement,
-  WorkflowStep,
   LoopDetectionConfig,
   WorkflowConfig,
   WorkflowState,

src/core/models/workflow-types.ts

@@ -83,9 +83,6 @@ export interface WorkflowMovement {
   parallel?: WorkflowMovement[];
 }
 
-/** @deprecated Use WorkflowMovement instead */
-export type WorkflowStep = WorkflowMovement;
-
 /** Loop detection configuration */
 export interface LoopDetectionConfig {
   /** Maximum consecutive runs of the same step before triggering (default: 10) */

src/core/workflow/constants.ts

@@ -9,11 +9,6 @@
 export const COMPLETE_MOVEMENT = 'COMPLETE';
 export const ABORT_MOVEMENT = 'ABORT';
 
-/** @deprecated Use COMPLETE_MOVEMENT instead */
-export const COMPLETE_STEP = COMPLETE_MOVEMENT;
-/** @deprecated Use ABORT_MOVEMENT instead */
-export const ABORT_STEP = ABORT_MOVEMENT;
-
 /** Maximum user inputs to store */
 export const MAX_USER_INPUTS = 100;
 export const MAX_INPUT_LENGTH = 10000;

src/core/workflow/engine/WorkflowEngine.ts

@@ -32,7 +32,6 @@ import { ParallelRunner } from './ParallelRunner.js';
 
 const log = createLogger('engine');
 
-// Re-export types for backward compatibility
 export type {
   WorkflowEvents,
   UserInputRequest,
@@ -41,7 +40,7 @@ export type {
   IterationLimitCallback,
   WorkflowEngineOptions,
 } from '../types.js';
-export { COMPLETE_MOVEMENT, ABORT_MOVEMENT, COMPLETE_STEP, ABORT_STEP } from '../constants.js';
+export { COMPLETE_MOVEMENT, ABORT_MOVEMENT } from '../constants.js';
 
 /** Workflow engine for orchestrating agent execution */
 export class WorkflowEngine extends EventEmitter {

src/core/workflow/engine/state-manager.ts

@@ -76,8 +76,6 @@ export class StateManager {
   }
 }
 
-// --- Backward-compatible function facades ---
-
 /**
  * Create initial workflow state from config and options.
  */

src/core/workflow/index.ts

@@ -9,7 +9,7 @@
 export { WorkflowEngine } from './engine/index.js';
 
 // Constants
-export { COMPLETE_MOVEMENT, ABORT_MOVEMENT, COMPLETE_STEP, ABORT_STEP, ERROR_MESSAGES } from './constants.js';
+export { COMPLETE_MOVEMENT, ABORT_MOVEMENT, ERROR_MESSAGES } from './constants.js';
 
 // Types
 export type {

src/core/workflow/instruction/ReportInstructionBuilder.ts

@@ -19,7 +19,7 @@ export interface ReportInstructionContext {
   cwd: string;
   /** Report directory path */
   reportDir: string;
-  /** Movement iteration (for {step_iteration} replacement) */
+  /** Movement iteration (for {movement_iteration} replacement) */
   movementIteration: number;
   /** Language */
   language?: Language;

src/core/workflow/instruction/escape.ts

@@ -18,7 +18,7 @@ export function escapeTemplateChars(str: string): string {
  * Replace template placeholders in the instruction_template body.
  *
  * These placeholders may still be used in instruction_template for
- * backward compatibility or special cases.
+ * special cases or legacy templates.
  */
 export function replaceTemplatePlaceholders(
   template: string,
@@ -34,8 +34,6 @@ export function replaceTemplatePlaceholders(
   result = result.replace(/\{iteration\}/g, String(context.iteration));
   result = result.replace(/\{max_iterations\}/g, String(context.maxIterations));
   result = result.replace(/\{movement_iteration\}/g, String(context.movementIteration));
-  // @deprecated Use {movement_iteration} instead
-  result = result.replace(/\{step_iteration\}/g, String(context.movementIteration));
 
   // Replace {previous_response}
   if (step.passPreviousResponse) {

src/core/workflow/types.ts

@@ -6,7 +6,7 @@
  */
 
 import type { PermissionResult, PermissionUpdate } from '@anthropic-ai/claude-agent-sdk';
-import type { WorkflowMovement, WorkflowStep, AgentResponse, WorkflowState, Language } from '../models/types.js';
+import type { WorkflowMovement, AgentResponse, WorkflowState, Language } from '../models/types.js';
 
 export type ProviderType = 'claude' | 'codex' | 'mock';
 

src/features/tasks/execute/taskExecution.ts

@@ -33,7 +33,7 @@ export async function executeTask(options: ExecuteTaskOptions): Promise<boolean>
       error(`Workflow file not found: ${workflowIdentifier}`);
     } else {
       error(`Workflow "${workflowIdentifier}" not found.`);
-      info('Available workflows are in ~/.takt/workflows/ or .takt/workflows/');
+      info('Available workflows are in ~/.takt/pieces/ or .takt/workflows/');
       info('Use "takt switch" to select a workflow.');
     }
     return false;

src/features/tasks/list/index.ts

@@ -24,7 +24,6 @@ import {
   instructBranch,
 } from './taskActions.js';
 
-// Re-export for backward compatibility (tests import from this module)
 export {
   type ListAction,
   isBranchMerged,

src/index.ts

@@ -18,7 +18,6 @@ export {
   getCurrentWorkflow,
   setCurrentWorkflow,
   isVerboseMode,
-  type ProjectPermissionMode,
   type ProjectLocalConfig,
   writeFileAtomic,
   getInputHistoryPath,
@@ -102,8 +101,8 @@ export * from './agents/index.js';
 // Workflow engine
 export {
   WorkflowEngine,
-  COMPLETE_STEP,
-  ABORT_STEP,
+  COMPLETE_MOVEMENT,
+  ABORT_MOVEMENT,
   ERROR_MESSAGES,
   determineNextMovementByRules,
   extractBlockedPrompt,

src/infra/claude/client.ts

@@ -10,7 +10,6 @@ import type { AgentResponse, Status } from '../../core/models/index.js';
 import { createLogger } from '../../shared/utils/index.js';
 import { loadTemplate } from '../../shared/prompts/index.js';
 
-// Re-export for backward compatibility
 export type { ClaudeCallOptions } from './types.js';
 
 const log = createLogger('client');
@@ -250,7 +249,7 @@ export class ClaudeClient {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level functions ----
 
 const defaultClient = new ClaudeClient();
 

src/infra/claude/executor.ts

@@ -174,9 +174,6 @@ export class QueryExecutor {
   }
 }
 
-// ---- Backward-compatible module-level function ----
-
-/** @deprecated Use QueryExecutor.execute() instead */
 export async function executeClaudeQuery(
   prompt: string,
   options: ClaudeSpawnOptions,

src/infra/claude/index.ts

@@ -54,14 +54,14 @@ export type {
 // Stream conversion
 export { sdkMessageToStreamEvent } from './stream-converter.js';
 
-// Options building (backward-compatible functions)
+// Options building
 export {
   createCanUseToolCallback,
   createAskUserQuestionHooks,
   buildSdkOptions,
 } from './options-builder.js';
 
-// Client functions (backward-compatible)
+// Client functions
 export {
   callClaude,
   callClaudeCustom,

src/infra/claude/options-builder.ts

@@ -177,7 +177,7 @@ export class SdkOptionsBuilder {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level functions ----
 
 export function createCanUseToolCallback(
   handler: PermissionHandler

src/infra/claude/process.ts

@@ -15,7 +15,6 @@ import type {
   ClaudeResult,
 } from './types.js';
 
-// Re-export types for backward compatibility
 export type {
   StreamEvent,
   StreamCallback,
@@ -59,7 +58,7 @@ export async function executeClaudeCli(
 }
 
 /**
- * ClaudeProcess class for backward compatibility.
+ * ClaudeProcess class wrapping the SDK query function.
  * Wraps the SDK query function.
  */
 export class ClaudeProcess {

src/infra/claude/query-manager.ts

@@ -84,7 +84,7 @@ export class QueryRegistry {
   }
 
   /**
-   * Interrupt the most recently started Claude query (backward compatibility).
+   * Interrupt the most recently started Claude query.
    * @returns true if a query was interrupted, false if no query was running
    */
   interruptCurrentProcess(): boolean {
@@ -96,8 +96,6 @@ export class QueryRegistry {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 /** Generate a unique query ID */
 export function generateQueryId(): string {
   return `q-${Date.now()}-${Math.random().toString(36).slice(2, 9)}`;

src/infra/claude/stream-converter.ts

@@ -2,7 +2,7 @@
  * SDK message to stream event converter
  *
  * Converts Claude Agent SDK messages to the internal stream event format
- * for backward compatibility with the streaming display system.
+ * for use with the streaming display system.
  */
 
 import type {
@@ -85,7 +85,7 @@ function extractToolResultContent(toolResult: unknown): { content: string; isErr
 }
 
 /**
- * Convert SDK message to stream event for backward compatibility.
+ * Convert SDK message to stream event.
  *
  * @param message - The SDK message to convert
  * @param callback - The callback to invoke with stream events

src/infra/claude/types.ts

@@ -12,7 +12,7 @@ import type { PermissionResult } from '../../core/workflow/index.js';
 // Re-export PermissionResult for convenience
 export type { PermissionResult, PermissionUpdate };
 
-/** Stream event data types (for backward compatibility) */
+/** Stream event data types */
 export interface InitEventData {
   model: string;
   sessionId: string;

src/infra/codex/client.ts

@@ -20,7 +20,6 @@ import {
   emitCodexItemUpdate,
 } from './CodexStreamHandler.js';
 
-// Re-export for backward compatibility
 export type { CodexCallOptions } from './types.js';
 
 const log = createLogger('codex-sdk');
@@ -199,8 +198,6 @@ export class CodexClient {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 const defaultClient = new CodexClient();
 
 export async function callCodex(

src/infra/config/global/globalConfig.ts

@@ -152,8 +152,6 @@ export class GlobalConfigManager {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 export function invalidateGlobalConfigCache(): void {
   GlobalConfigManager.getInstance().invalidateCache();
 }

src/infra/config/loaders/agentLoader.ts

@@ -69,7 +69,7 @@ export function listCustomAgents(): string[] {
  * Load agent prompt content.
  * Agents can be loaded from:
  * - ~/.takt/agents/*.md (global agents)
- * - ~/.takt/workflows/{workflow}/*.md (workflow-specific agents)
+ * - ~/.takt/pieces/{workflow}/*.md (workflow-specific agents)
  */
 export function loadAgentPrompt(agent: CustomAgentConfig): string {
   if (agent.prompt) {

src/infra/config/loaders/loader.ts

@@ -1,7 +1,7 @@
 /**
  * Configuration loader for takt
  *
- * Re-exports from specialized loaders for backward compatibility.
+ * Re-exports from specialized loaders.
  */
 
 // Workflow loading

src/infra/config/loaders/workflowParser.ts

@@ -215,14 +215,11 @@ function normalizeStepFromRaw(step: RawStep, workflowDir: string): WorkflowMovem
 export function normalizeWorkflowConfig(raw: unknown, workflowDir: string): WorkflowConfig {
   const parsed = WorkflowConfigRawSchema.parse(raw);
 
-  // Prefer `movements` over legacy `steps`
-  const rawMovements = parsed.movements ?? parsed.steps ?? [];
-  const movements: WorkflowMovement[] = rawMovements.map((step) =>
+  const movements: WorkflowMovement[] = parsed.movements.map((step) =>
     normalizeStepFromRaw(step, workflowDir),
   );
 
-  // Prefer `initial_movement` over legacy `initial_step`
-  const initialMovement = parsed.initial_movement ?? parsed.initial_step ?? movements[0]?.name ?? '';
+  const initialMovement = parsed.initial_movement ?? movements[0]?.name ?? '';
 
   return {
     name: parsed.name,

src/infra/config/loaders/workflowResolver.ts

@@ -96,8 +96,8 @@ function resolveWorkflowFile(workflowsDir: string, name: string): string | null
  *
  * Priority:
  * 1. Project-local workflows → .takt/workflows/{name}.yaml
- * 2. User workflows → ~/.takt/workflows/{name}.yaml
- * 3. Builtin workflows → resources/global/{lang}/workflows/{name}.yaml
+ * 2. User workflows → ~/.takt/pieces/{name}.yaml
+ * 3. Builtin workflows → resources/global/{lang}/pieces/{name}.yaml
  */
 export function loadWorkflow(
   name: string,
@@ -115,14 +115,6 @@ export function loadWorkflow(
     return loadWorkflowFromFile(globalMatch);
   }
 
-  // Fallback: legacy ~/.takt/workflows/ directory (deprecated)
-  const legacyGlobalDir = join(homedir(), '.takt', 'workflows');
-  const legacyMatch = resolveWorkflowFile(legacyGlobalDir, name);
-  if (legacyMatch) {
-    log.info(`Loading workflow from deprecated path ~/.takt/workflows/. Please move to ~/.takt/pieces/.`);
-    return loadWorkflowFromFile(legacyMatch);
-  }
-
   return getBuiltinWorkflow(name);
 }
 
@@ -229,12 +221,6 @@ function getWorkflowDirs(cwd: string): { dir: string; source: WorkflowSource; di
   if (getBuiltinWorkflowsEnabled()) {
     dirs.push({ dir: getBuiltinPiecesDir(lang), disabled, source: 'builtin' });
   }
-  // Legacy fallback: ~/.takt/workflows/ (deprecated, lowest user priority)
-  const legacyGlobalDir = join(homedir(), '.takt', 'workflows');
-  if (existsSync(legacyGlobalDir)) {
-    log.info(`Scanning deprecated path ~/.takt/workflows/. Please move to ~/.takt/pieces/.`);
-    dirs.push({ dir: legacyGlobalDir, source: 'user' });
-  }
   dirs.push({ dir: getGlobalPiecesDir(), source: 'user' });
   dirs.push({ dir: join(getProjectConfigDir(cwd), 'workflows'), source: 'project' });
   return dirs;
@@ -245,7 +231,7 @@ function getWorkflowDirs(cwd: string): { dir: string; source: WorkflowSource; di
  *
  * Priority (later entries override earlier):
  *   1. Builtin workflows
- *   2. User workflows (~/.takt/workflows/)
+ *   2. User workflows (~/.takt/pieces/)
  *   3. Project-local workflows (.takt/workflows/)
  */
 export function loadAllWorkflowsWithSources(cwd: string): Map<string, WorkflowWithSource> {
@@ -269,7 +255,7 @@ export function loadAllWorkflowsWithSources(cwd: string): Map<string, WorkflowWi
  *
  * Priority (later entries override earlier):
  *   1. Builtin workflows
- *   2. User workflows (~/.takt/workflows/)
+ *   2. User workflows (~/.takt/pieces/)
  *   3. Project-local workflows (.takt/workflows/)
  */
 export function loadAllWorkflows(cwd: string): Map<string, WorkflowConfig> {

src/infra/config/paths.ts

@@ -26,9 +26,6 @@ export function getGlobalPiecesDir(): string {
   return join(getGlobalConfigDir(), 'pieces');
 }
 
-/** @deprecated Use getGlobalPiecesDir() instead */
-export const getGlobalWorkflowsDir = getGlobalPiecesDir;
-
 /** Get takt global logs directory */
 export function getGlobalLogsDir(): string {
   return join(getGlobalConfigDir(), 'logs');
@@ -44,9 +41,6 @@ export function getBuiltinPiecesDir(lang: Language): string {
   return join(getLanguageResourcesDir(lang), 'pieces');
 }
 
-/** @deprecated Use getBuiltinPiecesDir() instead */
-export const getBuiltinWorkflowsDir = getBuiltinPiecesDir;
-
 /** Get builtin agents directory (resources/global/{lang}/agents) */
 export function getBuiltinAgentsDir(lang: Language): string {
   return join(getLanguageResourcesDir(lang), 'agents');
@@ -102,7 +96,7 @@ export {
   type ProjectLocalConfig,
 } from './project/projectConfig.js';
 
-// Re-export session storage functions for backward compatibility
+// Re-export session storage functions
 export {
   writeFileAtomic,
   getInputHistoryPath,

src/infra/config/project/index.ts

@@ -10,7 +10,6 @@ export {
   setCurrentWorkflow,
   isVerboseMode,
   type PermissionMode,
-  type ProjectPermissionMode,
   type ProjectLocalConfig,
 } from './projectConfig.js';
 

src/infra/config/project/projectConfig.ts

@@ -8,9 +8,9 @@ import { existsSync, readFileSync, writeFileSync, mkdirSync } from 'node:fs';
 import { join, resolve } from 'node:path';
 import { parse, stringify } from 'yaml';
 import { copyProjectResourcesToDir } from '../../resources/index.js';
-import type { PermissionMode, ProjectPermissionMode, ProjectLocalConfig } from '../types.js';
+import type { PermissionMode, ProjectLocalConfig } from '../types.js';
 
-export type { PermissionMode, ProjectPermissionMode, ProjectLocalConfig };
+export type { PermissionMode, ProjectLocalConfig };
 
 /** Default project configuration */
 const DEFAULT_PROJECT_CONFIG: ProjectLocalConfig = {

src/infra/config/types.ts

@@ -12,9 +12,6 @@ import type { WorkflowCategoryConfigNode } from '../../core/models/schemas.js';
  */
 export type PermissionMode = 'default' | 'sacrifice-my-pc';
 
-/** @deprecated Use PermissionMode instead */
-export type ProjectPermissionMode = PermissionMode;
-
 /** Project configuration stored in .takt/config.yaml */
 export interface ProjectLocalConfig {
   /** Current workflow name */

src/infra/fs/session.ts

@@ -13,7 +13,6 @@ import type {
   LatestLogPointer,
 } from '../../shared/utils/index.js';
 
-// Re-export types for backward compatibility
 export type {
   SessionLog,
   NdjsonWorkflowStart,
@@ -239,8 +238,6 @@ export class SessionManager {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 const defaultManager = new SessionManager();
 
 export function appendNdjsonLine(filepath: string, record: NdjsonRecord): void {

src/infra/providers/index.ts

@@ -10,7 +10,6 @@ import { CodexProvider } from './codex.js';
 import { MockProvider } from './mock.js';
 import type { Provider, ProviderType } from './types.js';
 
-// Re-export types for backward compatibility
 export type { ProviderCallOptions, Provider, ProviderType } from './types.js';
 
 /**
@@ -52,8 +51,6 @@ export class ProviderRegistry {
 
 }
 
-// ---- Backward-compatible module-level functions ----
-
 export function getProvider(type: ProviderType): Provider {
   return ProviderRegistry.getInstance().get(type);
 }

src/infra/task/autoCommit.ts

@@ -73,7 +73,7 @@ export class AutoCommitter {
   }
 }
 
-// ---- Backward-compatible module-level function ----
+// ---- Module-level function ----
 
 const defaultCommitter = new AutoCommitter();
 

src/infra/task/branchList.ts

@@ -248,7 +248,7 @@ export class BranchManager {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level functions ----
 
 const defaultManager = new BranchManager();
 

src/infra/task/clone.ts

@@ -249,7 +249,7 @@ export class CloneManager {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level functions ----
 
 const defaultManager = new CloneManager();
 

src/infra/task/parser.ts

@@ -3,7 +3,7 @@
  *
  * Supports both YAML (.yaml/.yml) and Markdown (.md) task files.
  * YAML files are validated against TaskFileSchema.
- * Markdown files are treated as plain text (backward compatible).
+ * Markdown files are treated as plain text.
  */
 
 import * as fs from 'node:fs';

src/infra/task/summarize.ts

@@ -81,7 +81,7 @@ export class TaskSummarizer {
   }
 }
 
-// ---- Backward-compatible module-level function ----
+// ---- Module-level function ----
 
 const defaultSummarizer = new TaskSummarizer();
 

src/shared/context.ts

@@ -36,8 +36,6 @@ export class AppContext {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 /** Get whether quiet mode is active (CLI flag or config, resolved in preAction) */
 export function isQuietMode(): boolean {
   return AppContext.getInstance().getQuietMode();

src/shared/prompt/select.ts

@@ -175,8 +175,6 @@ export interface InteractiveSelectCallbacks<T extends string> {
    * Return null to delegate to default handler.
    */
   onKeyPress?: (key: string, value: T, index: number) => SelectOptionItem<T>[] | null;
-  /** Called when 'b' key is pressed. Returns updated options for re-render. @deprecated Use onKeyPress instead */
-  onBookmark?: (value: T, index: number) => SelectOptionItem<T>[];
   /** Custom label for cancel option (default: "Cancel") */
   cancelLabel?: string;
 }
@@ -201,7 +199,7 @@ function interactiveSelect<T extends string>(
     let selectedIndex = initialIndex;
     const cancelLabel = callbacks?.cancelLabel ?? 'Cancel';
 
-    printHeader(message, !!callbacks?.onKeyPress || !!callbacks?.onBookmark);
+    printHeader(message, !!callbacks?.onKeyPress);
 
     process.stdout.write('\x1B[?7l');
 
@@ -265,22 +263,9 @@ function interactiveSelect<T extends string>(
           cleanup(onKeypress);
           resolve({ selectedIndex: result.cancelIndex, finalOptions: currentOptions });
           break;
-        case 'bookmark': {
-          if (!callbacks?.onBookmark) break;
-          // Only bookmark actual options, not the cancel row
-          if (result.selectedIndex >= currentOptions.length) break;
-          const item = currentOptions[result.selectedIndex];
-          if (!item) break;
-          const newOptions = callbacks.onBookmark(item.value, result.selectedIndex);
-          // Find the same value in the new options to preserve cursor position
-          const currentValue = item.value;
-          currentOptions = newOptions;
-          totalItems = hasCancelOption ? currentOptions.length + 1 : currentOptions.length;
-          const newIdx = currentOptions.findIndex((o) => o.value === currentValue);
-          selectedIndex = newIdx >= 0 ? newIdx : Math.min(selectedIndex, currentOptions.length - 1);
-          totalLines = redrawMenu(currentOptions, selectedIndex, hasCancelOption, totalLines, cancelLabel);
+        case 'bookmark':
+          // Handled by custom onKeyPress
           break;
-        }
         case 'remove_bookmark':
           // Ignore - should be handled by custom onKeyPress
           break;
@@ -299,7 +284,6 @@ function interactiveSelect<T extends string>(
 
 /**
  * Prompt user to select from a list of options using cursor navigation.
- * @param callbacks.onBookmark - Called when 'b' key is pressed. Returns updated options for re-render.
  * @returns Selected option or null if cancelled
  */
 export async function selectOption<T extends string>(

src/shared/ui/LogManager.ts

@@ -2,7 +2,7 @@
  * Log level management and formatted console output.
  *
  * LogManager is a singleton that encapsulates the current log level state.
- * Module-level functions are provided for backward compatibility.
+ * Module-level functions are provided as convenient facades.
  */
 
 import chalk from 'chalk';
@@ -84,8 +84,6 @@ export class LogManager {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
-
 export function setLogLevel(level: LogLevel): void {
   LogManager.getInstance().setLogLevel(level);
 }

src/shared/utils/debug.ts

@@ -165,7 +165,7 @@ export class DebugLogger {
   }
 }
 
-// ---- Backward-compatible module-level functions ----
+// ---- Module-level functions ----
 
 export function initDebugLogger(config?: DebugConfig, projectDir?: string): void {
   DebugLogger.getInstance().init(config, projectDir);