# v1.7 Update: Parallel Execution
Release Date: 2026-01-23
## Summary
v1.7 implements parallel execution optimization across all phases, reducing execution time by 27-35 seconds (7-9% improvement). This version focuses on eliminating sequential tool calls by enabling parallel search patterns and providing explicit LLM instructions.
**Status**: All phases completed (Phase 1a, 1b, 2)
---
## Background
### Problem: Sequential Tool Calls
Multiple phases suffered from sequential tool execution:
#### 1. EXPLORATION Phase (Step 4)
```
16:02:48 semantic_search complete
↓ [8s: LLM thinking]
16:02:56 search_text("modal")
↓ [11s: LLM waiting]
16:03:07 search_text("background")
↓ [9s: LLM waiting]
16:03:16 search_text("overlay")
↓ [7s: LLM thinking]
16:03:23 submit_understanding
```
**Bottleneck**: Intermediate waiting (11s + 9s = 20s)
#### 2. READY Phase (Step 9: Implementation)
```
Read("CartService.php")
↓ [2-3s: LLM waiting]
Read("ProductService.php")
↓ [2-3s: LLM waiting]
Read("OrderService.php")
```
**Bottleneck**: File reading delays (5-10s)
### Ideal Behavior
#### 1. EXPLORATION Phase
```
16:02:48 semantic_search complete
↓ [8s: LLM thinking - pattern selection]
16:02:56 search_text(patterns=["modal", "background", "overlay"])
↓ [0.06s: parallel execution]
↓ [7s: LLM thinking - result integration]
16:03:03 submit_understanding
```
**Savings**: 20s (no intermediate waiting)
#### 2. READY Phase
```
Single message with multiple Reads:
Read("CartService.php")
Read("ProductService.php")
Read("OrderService.php")
→ Parallel execution (0.1s)
```
**Savings**: 5-10s (no waiting)
### Total Expected Savings
**27-35 seconds** (EXPLORATION 20s + READY 5-10s + Others 2-5s)
---
## Implementation Approach
### Phase 1a: search_text Enhancement (1 hour)
**Goal**: Extend search_text to support multiple patterns for Phase 1b verification
#### Modifications to tools/ripgrep_tool.py
```python
async def search_text(
pattern: str | list[str], # Single or multiple patterns
path: str = ".",
file_type: str | None = None,
case_sensitive: bool = True,
context_lines: int = 0,
max_results: int = 100,
regex: bool = True,
) -> dict:
"""
Search for text patterns using ripgrep.
Args:
pattern: Single pattern (str) or multiple patterns (list[str])
Maximum 5 patterns for parallel search.
"""
# Single pattern
if isinstance(pattern, str):
return await _search_single(pattern, path, ...)
# Multiple patterns: limit check
if len(pattern) > 5:
return {"error": "Maximum 5 patterns allowed..."}
# Multiple patterns (parallel execution)
tasks = [_search_single(p, path, ...) for p in pattern]
results = await asyncio.gather(*tasks)
return {
"patterns": pattern,
"results": {p: r for p, r in zip(pattern, results)},
"total_patterns": len(pattern),
}
```
**Status**: ✅ Completed
### Phase 1b: Verification (1-1.5 hours)
**Goal**: Verify LLM follows parallel execution instructions
#### Instructions Added to code.md
##### Step 4: EXPLORATION Phase
```markdown
### ⚡ CRITICAL: Parallel Execution (v1.7)
**MANDATORY: Use parallel execution to save 15-25 seconds**
#### search_text: Multiple Patterns
✅ **CORRECT (saves 15-20 seconds)**:
```python
search_text(patterns=["modal", "dialog", "popup"])
```
❌ **WRONG (wastes time)**:
```python
search_text("modal") # Wait 10s
search_text("dialog") # Wait 10s
```
```
##### Step 9: READY Phase
```markdown
### ⚡ CRITICAL: Parallel File Operations (v1.7)
**MANDATORY: Read multiple files in parallel to save 5-10 seconds**
✅ **CORRECT (parallel execution)**:
<Read file_path="CartService.php" />
<Read file_path="ProductService.php" />
<Read file_path="OrderService.php" />
```
**Verification Result**: 3/3 tests successful → Proceed to Phase 2
**Status**: ✅ Completed
### Phase 2: Documentation (1 hour)
**Goal**: Complete documentation and confirm effectiveness
- Schema validation in code_intel_server.py
- README/CHANGELOG updates
- Real-world testing
**Status**: ✅ Completed
---
## New Features
### 1. Multi-Pattern search_text
**Usage:**
```python
# Single pattern (backward compatible)
search_text("modal")
# Multiple patterns (parallel execution, v1.7)
search_text(patterns=["modal", "dialog", "popup"])
```
**Limitations:**
- Maximum 5 patterns per call
- For more patterns, split into multiple calls
### 2. Parallel Execution Instructions
Added to `.claude/commands/code.md`:
| Phase | Optimization | Time Saved |
|-------|-------------|------------|
| EXPLORATION (Step 4) | search_text multi-pattern | 15-20s |
| SEMANTIC (Step 6) | Parallel Read | 1-2s |
| VERIFICATION (Step 7) | Parallel find_references/Read | 1-3s |
| IMPACT_ANALYSIS (Step 8) | Parallel Read for verification files | 4-6s |
| READY (Step 9) | Parallel Read/Grep | 5-10s |
**Total**: 27-35s (7-9% reduction)
### 3. Efficiency Guide
Created `.claude/PARALLEL_GUIDE.md`:
- Always use `/exp` command for exploration
- Parallel execution principles
- Example patterns for each phase
**Automatic Distribution:**
- `init-project.sh` now automatically copies `.claude/` files to projects
- Includes `CLAUDE.md`, `PARALLEL_GUIDE.md`, and skill files
---
## Breaking Changes
None. All changes are backward compatible.
---
## Performance Impact
| Metric | Before | After | Improvement |
|--------|--------|-------|-------------|
| EXPLORATION phase | 52s | 32s | -20s (38%) |
| READY phase | Variable | -5-10s | -5-10s |
| Other phases | Variable | -2-5s | -2-5s |
| **Total (/code task)** | **402s** | **375-367s** | **-27-35s (7-9%)** |
---
## Implementation Status
### Phase 1a: search_text Implementation (1 hour)
| Task | Status | Time |
|------|--------|------|
| tools/ripgrep_tool.py modification | ✅ Complete | 30min |
| Unit tests | ✅ Complete | 20min |
| code_intel_server.py schema update | ✅ Complete | 10min |
### Phase 1b: Verification (1-1.5 hours)
| Task | Status | Time |
|------|--------|------|
| test-parallel.md creation | ✅ Complete | 20min |
| code.md instructions | ✅ Complete | 15min |
| Verification tests (3 tests) | ✅ Complete | 5min |
| Result analysis | ✅ Complete | 5min |
**Result**: 3/3 tests successful → Phase 2 approved
### Phase 2: Documentation (1 hour)
| Task | Status | Time |
|------|--------|------|
| Schema validation | ✅ Complete | - |
| README updates | ✅ Complete | 20min |
| PARALLEL_GUIDE.md creation | ✅ Complete | 15min |
| Real-world testing | ✅ Complete | 5min |
| init-project.sh auto-distribution | ✅ Complete | 15min |
---
## Migration Guide
No migration required. All changes are backward compatible.
**To take advantage of v1.7:**
1. Pull latest code
2. For new projects: Run `./init-project.sh` (automatically includes parallel execution guide)
3. For existing projects: Copy `.claude/` directory manually or re-run `./init-project.sh`
---
## References
- [PARALLEL_GUIDE.md](../../.claude/PARALLEL_GUIDE.md)
- [/exp Command](../../.claude/commands/exp.md)
- [/code Command](../../.claude/commands/code.md)
- [v1.8 Planning](v1.8_ja.md) (includes v1.7 results)
