| name | codebase-explorer |
| description | Deep codebase exploration using semantic search and relationship mapping. Use when you need to understand the current codebase. |
| allowed-tools | Bash(codanna:*), Bash(sed:*), Bash(rg:*), Read, Grep, Glob |
Search Query Analysis
Query Optimization Skill
Codanna's semantic search works best with technical terms and specific concepts. Analyze the situation and optimize your codebase explore queries for code search:
Examples:
- If vague (e.g., "that parsing thing") → Make it specific (e.g., "language parser implementation")
- If a question (e.g., "how does parsing work?") → Extract keywords (e.g., "parsing implementation process")
- If conversational (e.g., "the stuff that handles languages") → Use technical terms (e.g., "language handler processor")
- If too broad (e.g., "errors") → Add context (e.g., "error handling exception management")
OptimizedQuery: {Claude: I will write my optimized query here, then use it below}
Execute this command with your optimized query:
Your Workflow
Gather Context
Use the Bash tool to perform semantic code search:
Execute: codanna mcp semantic_search_with_context query:"$OptimizedQuery" limit:5
What Codanna returns:
- Relevance scores (how well each result matches)
- Symbol signatures and documentation
- Relationships (calls, called_by, implements, defines)
- File locations with line ranges
Your Workflow
Analyze the results with their relevance scores (focus on results with score > 0.6 (if possible))
To see actual implementation of interesting results:
- Use the line range from the Location field to read just the relevant code
- Example: If you see "at
src/io/exit_code.rs:108-120" - Use the Read tool with:
file_path:src/io/exit_code.rs(use the working directory from your environment contextto construct the absolute path) offset: 108 (start line)limit: 13 (calculated as: 120 - 108 + 1)
- Formula:
limit = end_line - start_line + 1 - Example:
Read(file_path="/full/path/to/src/io/exit_code.rs", offset=108, limit=13)
When relationships are shown (called_by, calls, defines, implements):
- If a relationship looks relevant to answering the query, investigate it
- Execute:
codanna retrieve describe <relationship_symbol_name|symbol_id:ID> - Example: If you see "Called by:
initialize_registry [symbol_id:123]", run:codanna retrieve describe initialize_registryordescribe symbol_id:123 - Note: Following 1-2 key relationships per result is typically sufficient
Build a complete picture by following key relationships and reading relevant code sections
If needed, repeat <Step_1: GatherContext> with a refined query based on what you learned.
Tips for Efficient Exploration
The results include:
- Relevance scores (how well each result matches the query)
- Symbol documentation and signatures
- Relationships (who calls this, what it calls, what it defines)
- System guidance for follow-up investigation
sed (native on unix only):
You can also see actual implementation with
sed: (works native on Unix based environments):- Use the line range from the Location field to read just the relevant code
- Example: If you see "Location:
src/io/exit_code.rs:108-120" - Execute:
sed -n '108,120p' src/io/exit_code.rsto read lines 108-120 - This shows the actual code implementation, not just the signature. It works like the Read tool.
Add
lang:rust(or python, typescript, etc.) to narrow results by language if you work on multi-language projectsFollow relationships that appear in multiple results (they're likely important)
Use the
describecommand to get full details about interesting relationships
Token awareness:
- Each search uses ~500 tokens
- Each relationship follow uses ~300 tokens
- Each file read uses ~100-500 tokens (depends on size)
- Staying efficient keeps your context window clean for deeper analysis
This command is for exploration:
- Build understanding of the codebase
- Identify patterns and integration points
- Present findings and await user direction
- Don't start implementing or making changes yet
Based on the gathered context, engage with the user to narrow focus and help the user with further request.