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Claude-Code-Workflow/.claude/skills/team-perf-opt/subagents/explore-subagent.md

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# Explore Subagent
Shared codebase exploration for discovering performance-critical code paths, module structures, and optimization opportunities. Results are cached to avoid redundant exploration across profiler and optimizer roles.
## Design Rationale
Codebase exploration is a read-only operation shared between profiler (mapping bottlenecks) and optimizer (understanding implementation context). Caching explorations avoids redundant work when optimizer re-explores paths the profiler already mapped.
## Invocation
Called by profiler, optimizer after needing codebase context for performance analysis or implementation:
```
Task({
subagent_type: "cli-explore-agent",
run_in_background: false,
description: "Explore codebase for performance-critical paths in <target-scope>",
prompt: `Explore the codebase to identify performance-critical code paths.
Target scope: <target-scope>
Session: <session-folder>
Focus: <exploration-focus>
Tasks:
1. Map the module structure and entry points within scope
2. Identify hot code paths (frequently called functions, critical loops)
3. Find performance-relevant patterns (caching, lazy loading, async, pooling)
4. Note any existing performance optimizations or benchmark harnesses
5. List key files with their roles in the performance-critical path
Output a structured exploration report with:
- Module map (key files and their relationships)
- Hot path analysis (call chains, loop nests, recursive patterns)
- Existing optimization patterns found
- Performance-relevant configuration (caching, pooling, batching settings)
- Recommended investigation targets for profiling`
})
```
## Cache Mechanism
### Cache Index Schema
`<session-folder>/explorations/cache-index.json`:
```json
{
"entries": [
{
"key": "<scope-hash>",
"scope": "<target-scope>",
"focus": "<exploration-focus>",
"timestamp": "<ISO-8601>",
"result_file": "<hash>.md"
}
]
}
```
### Cache Lookup Rules
| Condition | Action |
|-----------|--------|
| Exact scope+focus match exists | Return cached result from <hash>.md |
| No match | Execute subagent, cache result to <hash>.md, update index |
| Cache file missing but index has entry | Remove stale entry, re-execute |
| Cache older than current session | Use cached (explorations are stable within session) |
## Integration with Calling Role
The calling role is responsible for:
1. **Before calling**: Determine target scope and exploration focus
2. **Calling**: Check cache first, invoke subagent only on cache miss
3. **After calling**:
| Result | Action |
|--------|--------|
| Exploration successful | Use findings to inform profiling/implementation |
| Exploration partial | Use available findings, note gaps |
| Exploration failed | Proceed without exploration context, use direct file reading |
## Output Schema
```json
{
"scope": "<target-scope>",
"module_map": [
{ "file": "<path>", "role": "<description>", "hot_path": true }
],
"hot_paths": [
{ "chain": "<call-chain>", "frequency": "<high|medium|low>", "files": ["<path>"] }
],
"existing_optimizations": [
{ "type": "<pattern>", "location": "<file:line>", "description": "<what>" }
],
"investigation_targets": ["<file-or-pattern>"]
}
```
## Error Handling
| Scenario | Resolution |
|----------|------------|
| Single exploration angle fails | Continue with partial results |
| All exploration fails | Return basic result from direct file listing |
| Target scope not found | Return error immediately |
| Cache corrupt | Clear cache-index.json, re-execute |