feat(builtin-commands): add /refactor command for intelligent LSP/AST-based refactoring

Ports the refactor command from ~/.config/opencode/command/refactor.md to the project as a builtin command.

The /refactor command provides deterministic, LSP/AST-aware refactoring with:
- Automatic intent analysis and codebase mapping
- Risk assessment with test coverage verification
- Detailed planning via Plan agent
- Step-by-step execution with continuous verification
- Zero-regression guarantees via comprehensive testing

Supports multiple refactoring scopes (file/module/project) and strategies (safe/aggressive).

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/features/builtin-commands/commands.ts

@@ -2,6 +2,7 @@ import type { CommandDefinition } from "../claude-code-command-loader"
 import type { BuiltinCommandName, BuiltinCommands } from "./types"
 import { INIT_DEEP_TEMPLATE } from "./templates/init-deep"
 import { RALPH_LOOP_TEMPLATE, CANCEL_RALPH_TEMPLATE } from "./templates/ralph-loop"
+import { REFACTOR_TEMPLATE } from "./templates/refactor"
 
 const BUILTIN_COMMAND_DEFINITIONS: Record<BuiltinCommandName, Omit<CommandDefinition, "name">> = {
   "init-deep": {
@@ -32,6 +33,14 @@ $ARGUMENTS
 ${CANCEL_RALPH_TEMPLATE}
 </command-instruction>`,
   },
+  refactor: {
+    description:
+      "(builtin) Intelligent refactoring command with LSP, AST-grep, architecture analysis, codemap, and TDD verification.",
+    template: `<command-instruction>
+${REFACTOR_TEMPLATE}
+</command-instruction>`,
+    argumentHint: "<refactoring-target> [--scope=<file|module|project>] [--strategy=<safe|aggressive>]",
+  },
 }
 
 export function loadBuiltinCommands(

src/features/builtin-commands/templates/refactor.ts

@@ -0,0 +1,624 @@
+export const REFACTOR_TEMPLATE = `# Intelligent Refactor Command
+
+## Usage
+\`\`\`
+/refactor <refactoring-target> [--scope=<file|module|project>] [--strategy=<safe|aggressive>]
+
+Arguments:
+  refactoring-target: What to refactor. Can be:
+    - File path: src/auth/handler.ts
+    - Symbol name: "AuthService class"
+    - Pattern: "all functions using deprecated API"
+    - Description: "extract validation logic into separate module"
+
+Options:
+  --scope: Refactoring scope (default: module)
+    - file: Single file only
+    - module: Module/directory scope
+    - project: Entire codebase
+
+  --strategy: Risk tolerance (default: safe)
+    - safe: Conservative, maximum test coverage required
+    - aggressive: Allow broader changes with adequate coverage
+\`\`\`
+
+## What This Command Does
+
+Performs intelligent, deterministic refactoring with full codebase awareness. Unlike blind search-and-replace, this command:
+
+1. **Understands your intent** - Analyzes what you actually want to achieve
+2. **Maps the codebase** - Builds a definitive codemap before touching anything
+3. **Assesses risk** - Evaluates test coverage and determines verification strategy
+4. **Plans meticulously** - Creates a detailed plan with Plan agent
+5. **Executes precisely** - Step-by-step refactoring with LSP and AST-grep
+6. **Verifies constantly** - Runs tests after each change to ensure zero regression
+
+---
+
+# PHASE 0: INTENT GATE (MANDATORY FIRST STEP)
+
+**BEFORE ANY ACTION, classify and validate the request.**
+
+## Step 0.1: Parse Request Type
+
+| Signal | Classification | Action |
+|--------|----------------|--------|
+| Specific file/symbol | Explicit | Proceed to codebase analysis |
+| "Refactor X to Y" | Clear transformation | Proceed to codebase analysis |
+| "Improve", "Clean up" | Open-ended | **MUST ask**: "What specific improvement?" |
+| Ambiguous scope | Uncertain | **MUST ask**: "Which modules/files?" |
+| Missing context | Incomplete | **MUST ask**: "What's the desired outcome?" |
+
+## Step 0.2: Validate Understanding
+
+Before proceeding, confirm:
+- [ ] Target is clearly identified
+- [ ] Desired outcome is understood
+- [ ] Scope is defined (file/module/project)
+- [ ] Success criteria can be articulated
+
+**If ANY of above is unclear, ASK CLARIFYING QUESTION:**
+
+\`\`\`
+I want to make sure I understand the refactoring goal correctly.
+
+**What I understood**: [interpretation]
+**What I'm unsure about**: [specific ambiguity]
+
+Options I see:
+1. [Option A] - [implications]
+2. [Option B] - [implications]
+
+**My recommendation**: [suggestion with reasoning]
+
+Should I proceed with [recommendation], or would you prefer differently?
+\`\`\`
+
+## Step 0.3: Create Initial Todos
+
+**IMMEDIATELY after understanding the request, create todos:**
+
+\`\`\`
+TodoWrite([
+  {"id": "phase-1", "content": "PHASE 1: Codebase Analysis - launch parallel explore agents", "status": "pending", "priority": "high"},
+  {"id": "phase-2", "content": "PHASE 2: Build Codemap - map dependencies and impact zones", "status": "pending", "priority": "high"},
+  {"id": "phase-3", "content": "PHASE 3: Test Assessment - analyze test coverage and verification strategy", "status": "pending", "priority": "high"},
+  {"id": "phase-4", "content": "PHASE 4: Plan Generation - invoke Plan agent for detailed refactoring plan", "status": "pending", "priority": "high"},
+  {"id": "phase-5", "content": "PHASE 5: Execute Refactoring - step-by-step with continuous verification", "status": "pending", "priority": "high"},
+  {"id": "phase-6", "content": "PHASE 6: Final Verification - full test suite and regression check", "status": "pending", "priority": "high"}
+])
+\`\`\`
+
+---
+
+# PHASE 1: CODEBASE ANALYSIS (PARALLEL EXPLORATION)
+
+**Mark phase-1 as in_progress.**
+
+## 1.1: Launch Parallel Explore Agents (BACKGROUND)
+
+Fire ALL of these simultaneously using \`call_omo_agent\`:
+
+\`\`\`
+// Agent 1: Find the refactoring target
+call_omo_agent(
+  subagent_type="explore",
+  run_in_background=true,
+  prompt="Find all occurrences and definitions of [TARGET]. 
+  Report: file paths, line numbers, usage patterns."
+)
+
+// Agent 2: Find related code
+call_omo_agent(
+  subagent_type="explore", 
+  run_in_background=true,
+  prompt="Find all code that imports, uses, or depends on [TARGET].
+  Report: dependency chains, import graphs."
+)
+
+// Agent 3: Find similar patterns
+call_omo_agent(
+  subagent_type="explore",
+  run_in_background=true,
+  prompt="Find similar code patterns to [TARGET] in the codebase.
+  Report: analogous implementations, established conventions."
+)
+
+// Agent 4: Find tests
+call_omo_agent(
+  subagent_type="explore",
+  run_in_background=true,
+  prompt="Find all test files related to [TARGET].
+  Report: test file paths, test case names, coverage indicators."
+)
+
+// Agent 5: Architecture context
+call_omo_agent(
+  subagent_type="explore",
+  run_in_background=true,
+  prompt="Find architectural patterns and module organization around [TARGET].
+  Report: module boundaries, layer structure, design patterns in use."
+)
+\`\`\`
+
+## 1.2: Direct Tool Exploration (WHILE AGENTS RUN)
+
+While background agents are running, use direct tools:
+
+### LSP Tools for Precise Analysis:
+
+\`\`\`typescript
+// Get symbol information at target location
+lsp_hover(filePath, line, character)  // Type info, docs, signatures
+
+// Find definition(s)
+lsp_goto_definition(filePath, line, character)  // Where is it defined?
+
+// Find ALL usages across workspace
+lsp_find_references(filePath, line, character, includeDeclaration=true)
+
+// Get file structure
+lsp_document_symbols(filePath)  // Hierarchical outline
+
+// Search symbols by name
+lsp_workspace_symbols(filePath, query="[target_symbol]")
+
+// Get current diagnostics
+lsp_diagnostics(filePath)  // Errors, warnings before we start
+\`\`\`
+
+### AST-Grep for Pattern Analysis:
+
+\`\`\`typescript
+// Find structural patterns
+ast_grep_search(
+  pattern="function $NAME($$$) { $$$ }",  // or relevant pattern
+  lang="typescript",  // or relevant language
+  paths=["src/"]
+)
+
+// Preview refactoring (DRY RUN)
+ast_grep_replace(
+  pattern="[old_pattern]",
+  rewrite="[new_pattern]",
+  lang="[language]",
+  dryRun=true  // ALWAYS preview first
+)
+\`\`\`
+
+### Grep for Text Patterns:
+
+\`\`\`
+grep(pattern="[search_term]", path="src/", include="*.ts")
+\`\`\`
+
+## 1.3: Collect Background Results
+
+\`\`\`
+background_output(task_id="[agent_1_id]")
+background_output(task_id="[agent_2_id]")
+...
+\`\`\`
+
+**Mark phase-1 as completed after all results collected.**
+
+---
+
+# PHASE 2: BUILD CODEMAP (DEPENDENCY MAPPING)
+
+**Mark phase-2 as in_progress.**
+
+## 2.1: Construct Definitive Codemap
+
+Based on Phase 1 results, build:
+
+\`\`\`
+## CODEMAP: [TARGET]
+
+### Core Files (Direct Impact)
+- \`path/to/file.ts:L10-L50\` - Primary definition
+- \`path/to/file2.ts:L25\` - Key usage
+
+### Dependency Graph
+\`\`\`
+[TARGET] 
+├── imports from: 
+│   ├── module-a (types)
+│   └── module-b (utils)
+├── imported by:
+│   ├── consumer-1.ts
+│   ├── consumer-2.ts
+│   └── consumer-3.ts
+└── used by:
+    ├── handler.ts (direct call)
+    └── service.ts (dependency injection)
+\`\`\`
+
+### Impact Zones
+| Zone | Risk Level | Files Affected | Test Coverage |
+|------|------------|----------------|---------------|
+| Core | HIGH | 3 files | 85% covered |
+| Consumers | MEDIUM | 8 files | 70% covered |
+| Edge | LOW | 2 files | 50% covered |
+
+### Established Patterns
+- Pattern A: [description] - used in N places
+- Pattern B: [description] - established convention
+\`\`\`
+
+## 2.2: Identify Refactoring Constraints
+
+Based on codemap:
+- **MUST follow**: [existing patterns identified]
+- **MUST NOT break**: [critical dependencies]
+- **Safe to change**: [isolated code zones]
+- **Requires migration**: [breaking changes impact]
+
+**Mark phase-2 as completed.**
+
+---
+
+# PHASE 3: TEST ASSESSMENT (VERIFICATION STRATEGY)
+
+**Mark phase-3 as in_progress.**
+
+## 3.1: Detect Test Infrastructure
+
+\`\`\`bash
+# Check for test commands
+cat package.json | jq '.scripts | keys[] | select(test("test"))'
+
+# Or for Python
+ls -la pytest.ini pyproject.toml setup.cfg
+
+# Or for Go
+ls -la *_test.go
+\`\`\`
+
+## 3.2: Analyze Test Coverage
+
+\`\`\`
+// Find all tests related to target
+call_omo_agent(
+  subagent_type="explore",
+  run_in_background=false,  // Need this synchronously
+  prompt="Analyze test coverage for [TARGET]:
+  1. Which test files cover this code?
+  2. What test cases exist?
+  3. Are there integration tests?
+  4. What edge cases are tested?
+  5. Estimated coverage percentage?"
+)
+\`\`\`
+
+## 3.3: Determine Verification Strategy
+
+Based on test analysis:
+
+| Coverage Level | Strategy |
+|----------------|----------|
+| HIGH (>80%) | Run existing tests after each step |
+| MEDIUM (50-80%) | Run tests + add safety assertions |
+| LOW (<50%) | **PAUSE**: Propose adding tests first |
+| NONE | **BLOCK**: Refuse aggressive refactoring |
+
+**If coverage is LOW or NONE, ask user:**
+
+\`\`\`
+Test coverage for [TARGET] is [LEVEL].
+
+**Risk Assessment**: Refactoring without adequate tests is dangerous.
+
+Options:
+1. Add tests first, then refactor (RECOMMENDED)
+2. Proceed with extra caution, manual verification required
+3. Abort refactoring
+
+Which approach do you prefer?
+\`\`\`
+
+## 3.4: Document Verification Plan
+
+\`\`\`
+## VERIFICATION PLAN
+
+### Test Commands
+- Unit: \`bun test\` / \`npm test\` / \`pytest\` / etc.
+- Integration: [command if exists]
+- Type check: \`tsc --noEmit\` / \`pyright\` / etc.
+
+### Verification Checkpoints
+After each refactoring step:
+1. lsp_diagnostics → zero new errors
+2. Run test command → all pass
+3. Type check → clean
+
+### Regression Indicators
+- [Specific test that must pass]
+- [Behavior that must be preserved]
+- [API contract that must not change]
+\`\`\`
+
+**Mark phase-3 as completed.**
+
+---
+
+# PHASE 4: PLAN GENERATION (PLAN AGENT)
+
+**Mark phase-4 as in_progress.**
+
+## 4.1: Invoke Plan Agent
+
+\`\`\`
+Task(
+  subagent_type="plan",
+  prompt="Create a detailed refactoring plan:
+
+  ## Refactoring Goal
+  [User's original request]
+
+  ## Codemap (from Phase 2)
+  [Insert codemap here]
+
+  ## Test Coverage (from Phase 3)
+  [Insert verification plan here]
+
+  ## Constraints
+  - MUST follow existing patterns: [list]
+  - MUST NOT break: [critical paths]
+  - MUST run tests after each step
+
+  ## Requirements
+  1. Break down into atomic refactoring steps
+  2. Each step must be independently verifiable
+  3. Order steps by dependency (what must happen first)
+  4. Specify exact files and line ranges for each step
+  5. Include rollback strategy for each step
+  6. Define commit checkpoints"
+)
+\`\`\`
+
+## 4.2: Review and Validate Plan
+
+After receiving plan from Plan agent:
+
+1. **Verify completeness**: All identified files addressed?
+2. **Verify safety**: Each step reversible?
+3. **Verify order**: Dependencies respected?
+4. **Verify verification**: Test commands specified?
+
+## 4.3: Register Detailed Todos
+
+Convert Plan agent output into granular todos:
+
+\`\`\`
+TodoWrite([
+  // Each step from the plan becomes a todo
+  {"id": "refactor-1", "content": "Step 1: [description]", "status": "pending", "priority": "high"},
+  {"id": "verify-1", "content": "Verify Step 1: run tests", "status": "pending", "priority": "high"},
+  {"id": "refactor-2", "content": "Step 2: [description]", "status": "pending", "priority": "medium"},
+  {"id": "verify-2", "content": "Verify Step 2: run tests", "status": "pending", "priority": "medium"},
+  // ... continue for all steps
+])
+\`\`\`
+
+**Mark phase-4 as completed.**
+
+---
+
+# PHASE 5: EXECUTE REFACTORING (DETERMINISTIC EXECUTION)
+
+**Mark phase-5 as in_progress.**
+
+## 5.1: Execution Protocol
+
+For EACH refactoring step:
+
+### Pre-Step
+1. Mark step todo as \`in_progress\`
+2. Read current file state
+3. Verify lsp_diagnostics is baseline
+
+### Execute Step
+Use appropriate tool:
+
+**For Symbol Renames:**
+\`\`\`typescript
+lsp_prepare_rename(filePath, line, character)  // Validate rename is possible
+lsp_rename(filePath, line, character, newName)  // Execute rename
+\`\`\`
+
+**For Pattern Transformations:**
+\`\`\`typescript
+// Preview first
+ast_grep_replace(pattern, rewrite, lang, dryRun=true)
+
+// If preview looks good, execute
+ast_grep_replace(pattern, rewrite, lang, dryRun=false)
+\`\`\`
+
+**For Structural Changes:**
+\`\`\`typescript
+// Use Edit tool for precise changes
+edit(filePath, oldString, newString)
+\`\`\`
+
+### Post-Step Verification (MANDATORY)
+
+\`\`\`typescript
+// 1. Check diagnostics
+lsp_diagnostics(filePath)  // Must be clean or same as baseline
+
+// 2. Run tests
+bash("bun test")  // Or appropriate test command
+
+// 3. Type check
+bash("tsc --noEmit")  // Or appropriate type check
+\`\`\`
+
+### Step Completion
+1. If verification passes → Mark step todo as \`completed\`
+2. If verification fails → **STOP AND FIX**
+
+## 5.2: Failure Recovery Protocol
+
+If ANY verification fails:
+
+1. **STOP** immediately
+2. **REVERT** the failed change
+3. **DIAGNOSE** what went wrong
+4. **OPTIONS**:
+   - Fix the issue and retry
+   - Skip this step (if optional)
+   - Consult oracle agent for help
+   - Ask user for guidance
+
+**NEVER proceed to next step with broken tests.**
+
+## 5.3: Commit Checkpoints
+
+After each logical group of changes:
+
+\`\`\`bash
+git add [changed-files]
+git commit -m "refactor(scope): description
+
+[details of what was changed and why]"
+\`\`\`
+
+**Mark phase-5 as completed when all refactoring steps done.**
+
+---
+
+# PHASE 6: FINAL VERIFICATION (REGRESSION CHECK)
+
+**Mark phase-6 as in_progress.**
+
+## 6.1: Full Test Suite
+
+\`\`\`bash
+# Run complete test suite
+bun test  # or npm test, pytest, go test, etc.
+\`\`\`
+
+## 6.2: Type Check
+
+\`\`\`bash
+# Full type check
+tsc --noEmit  # or equivalent
+\`\`\`
+
+## 6.3: Lint Check
+
+\`\`\`bash
+# Run linter
+eslint .  # or equivalent
+\`\`\`
+
+## 6.4: Build Verification (if applicable)
+
+\`\`\`bash
+# Ensure build still works
+bun run build  # or npm run build, etc.
+\`\`\`
+
+## 6.5: Final Diagnostics
+
+\`\`\`typescript
+// Check all changed files
+for (file of changedFiles) {
+  lsp_diagnostics(file)  // Must all be clean
+}
+\`\`\`
+
+## 6.6: Generate Summary
+
+\`\`\`markdown
+## Refactoring Complete
+
+### What Changed
+- [List of changes made]
+
+### Files Modified
+- \`path/to/file.ts\` - [what changed]
+- \`path/to/file2.ts\` - [what changed]
+
+### Verification Results
+- Tests: PASSED (X/Y passing)
+- Type Check: CLEAN
+- Lint: CLEAN
+- Build: SUCCESS
+
+### No Regressions Detected
+All existing tests pass. No new errors introduced.
+\`\`\`
+
+**Mark phase-6 as completed.**
+
+---
+
+# CRITICAL RULES
+
+## NEVER DO
+- Skip lsp_diagnostics check after changes
+- Proceed with failing tests
+- Make changes without understanding impact
+- Use \`as any\`, \`@ts-ignore\`, \`@ts-expect-error\`
+- Delete tests to make them pass
+- Commit broken code
+- Refactor without understanding existing patterns
+
+## ALWAYS DO
+- Understand before changing
+- Preview before applying (ast_grep dryRun=true)
+- Verify after every change
+- Follow existing codebase patterns
+- Keep todos updated in real-time
+- Commit at logical checkpoints
+- Report issues immediately
+
+## ABORT CONDITIONS
+If any of these occur, **STOP and consult user**:
+- Test coverage is zero for target code
+- Changes would break public API
+- Refactoring scope is unclear
+- 3 consecutive verification failures
+- User-defined constraints violated
+
+---
+
+# Tool Usage Philosophy
+
+You already know these tools. Use them intelligently:
+
+## LSP Tools
+Leverage the full LSP toolset (\`lsp_*\`) for precision analysis. Key patterns:
+- **Understand before changing**: \`lsp_hover\`, \`lsp_goto_definition\` to grasp context
+- **Impact analysis**: \`lsp_find_references\` to map all usages before modification
+- **Safe refactoring**: \`lsp_prepare_rename\` → \`lsp_rename\` for symbol renames
+- **Continuous verification**: \`lsp_diagnostics\` after every change
+
+## AST-Grep
+Use \`ast_grep_search\` and \`ast_grep_replace\` for structural transformations.
+**Critical**: Always \`dryRun=true\` first, review, then execute.
+
+## Agents
+- \`explore\`: Parallel codebase pattern discovery
+- \`plan\`: Detailed refactoring plan generation
+- \`oracle\`: Consult for complex architectural decisions
+- \`librarian\`: **Use proactively** when encountering deprecated methods or library migration tasks. Query official docs and OSS examples for modern replacements.
+
+## Deprecated Code & Library Migration
+When you encounter deprecated methods/APIs during refactoring:
+1. Fire \`librarian\` to find the recommended modern alternative
+2. **DO NOT auto-upgrade to latest version** unless user explicitly requests migration
+3. If user requests library migration, use \`librarian\` to fetch latest API docs before making changes
+
+---
+
+**Remember: Refactoring without tests is reckless. Refactoring without understanding is destructive. This command ensures you do neither.**
+
+<user-request>
+$ARGUMENTS
+</user-request>
+`

src/features/builtin-commands/types.ts

@@ -1,6 +1,6 @@
 import type { CommandDefinition } from "../claude-code-command-loader"
 
-export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph"
+export type BuiltinCommandName = "init-deep" | "ralph-loop" | "cancel-ralph" | "refactor"
 
 export interface BuiltinCommandConfig {
   disabled_commands?: BuiltinCommandName[]

src/index.ts

@@ -264,10 +264,6 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "chat.message": async (input, output) => {
-      if (input.agent === "Sisyphus") {
-        (output.message as Record<string, unknown>).variant = "max"
-      }
-
       await claudeCodeHooks["chat.message"]?.(input, output);
       await keywordDetector?.["chat.message"]?.(input, output);
       await contextInjector["chat.message"]?.(input, output);