name	code-navigation
description	Use when you need to understand the codebase structure, find definitions, or trace references without reading entire files.
version	1.0.0
last_verified	Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time)
author	system
tags	lsp, codebase-exploration, architecture, efficiency
allowed-tools	cclsp, Glob, Grep, Read

Code Navigation Standards

1. Context

This skill enforces "LSP First" - using the Language Server Protocol (cclsp) for code navigation instead of token-heavy text processing. This implements the "Precision and Parsimony" principle from the Flywheel architecture.

Key Principle: Do not read entire files to find a single definition. Use LSP to navigate like a Software Architect.

2. Verified Procedure

Definition Lookup

# DO: Use LSP to jump directly to definition
cclsp definition <symbol>

# DON'T: Read the entire file searching for the definition
cat src/large_file.py | grep "def function_name"

Finding References

# DO: Use LSP to find all usages
cclsp references <symbol>

# DON'T: Grep across the entire codebase
grep -r "function_name" .

Type and Signature Information

# DO: Use LSP hover to see parameters and types
cclsp hover <symbol>

# DON'T: Read function definition to understand signature
Read src/file.py  # Then manually parse the function signature

Codebase Structure Exploration

# DO: Use Glob for file discovery first, then LSP for details
Glob "**/*.py" | cclsp outline

# DON'T: Read every file to understand structure
for file in $(find . -name "*.py"); do cat $file; done

3. Negative Knowledge

Failed Attempts

Attempt	Why It Failed	Token Cost
Reading full files to find class definitions	Wasted 10,000+ tokens on a 500-line file when LSP would have returned the answer in <50 tokens	200x overhead
Using `grep -r` across large codebases	Returned too many false positives, required reading multiple files to find the right reference	50x overhead
Guessing import paths without LSP verification	Led to incorrect imports that failed at runtime	Required debugging iteration
Reading documentation files instead of using `cclsp hover`	Documentation was outdated; LSP provided current signature from source	Incorrect information

Anti-Patterns to Avoid

Token Waste: Reading entire files when you only need a single function signature.
Grep Overuse: Using grep for semantic queries that LSP can answer precisely.
Path Guessing: Assuming file locations instead of using cclsp definition to verify.
Ignoring Type Information: Not using cclsp hover to understand parameter types and return values.

4. Tool Selection Matrix

Task	Tool	Rationale
Find where function is defined	`cclsp definition`	Direct, token-efficient
Find all usages of a class	`cclsp references`	Semantic understanding
Understand function signature	`cclsp hover`	Includes types and docs
Find files matching pattern	`Glob`	Fast file discovery
Search for string literal	`Grep`	Text search, not semantic
Read implementation details	`Read`	Only after LSP narrows scope

5. Workflow Example

Task: "Find where UserAuth class is used and understand its constructor"

# Step 1: Find the definition
cclsp definition UserAuth

# Step 2: Get constructor signature
cclsp hover UserAuth.__init__

# Step 3: Find all references
cclsp references UserAuth

# Step 4: Only NOW read specific files if needed
Read src/auth/user_auth.py

Token Savings: ~90% compared to reading all files that might contain UserAuth.

6. Integration with Flywheel

Before: Agent reads 5-10 files (2000+ lines) to understand a function.
After: Agent uses LSP to get exact definition in <20 lines of output.
Result: Faster responses, lower costs, more context budget for complex reasoning.

7. Verification Checklist

Before opening a file with Read, ask:

Can cclsp definition answer this question?
Can cclsp references show me where this is used?
Can cclsp hover give me the signature/type?
Have I used Glob to narrow down the file search first?

If any answer is YES, use that tool FIRST.

8. Maintenance Notes

LSP Availability: Requires cclsp.json configuration in repository root.
Language Support: Check which languages are supported by the LSP server in your environment.
Fallback: If LSP fails, THEN use Grep + Read, but document the failure in this skill's Negative Knowledge.

Last Updated: 2025-12-31 Source: The CLAUDE.md Blueprint - LSP First Principle

code-navigation

Install Skill

SKILL.md