GrepAI Search Tips

This skill provides tips and best practices for writing effective semantic search queries.

When to Use This Skill

• Improving search result quality

• Learning semantic search techniques

• Understanding how to phrase queries

• Troubleshooting poor search results

Semantic Search Mindset

Think differently from text search:

Text Search (grep) Semantic Search (GrepAI)

Search for exact text Search for meaning/intent

"getUserById" "retrieve user from database by ID"

Literal match Conceptual match

Query Writing Principles

1. Describe Intent, Not Implementation

❌ Bad: getUserById

✅ Good: fetch user record from database using ID

❌ Bad: handleError

✅ Good: error handling and response to client

❌ Bad: validateInput

✅ Good: check if user input is valid and safe

2. Use Descriptive Language

❌ Bad: auth

✅ Good: user authentication and authorization

❌ Bad: db

✅ Good: database connection and queries

❌ Bad: config

✅ Good: application configuration loading

3. Be Specific About Context

❌ Bad: validation

✅ Good: validate email address format

❌ Bad: parse

✅ Good: parse JSON request body

❌ Bad: send

✅ Good: send email notification to user

4. Use 3-7 Words

Length Example Quality

Too short "auth" ⚠️ Vague

Good "user authentication middleware" ✅ Specific

Too long "the code that handles user authentication and validates JWT tokens in the middleware layer" ⚠️ Verbose

5. Use English

Embedding models are trained primarily on English:

❌ authentification utilisateur (French) ✅ user authentication

Even if your code comments are in another language, English queries work best.

Query Patterns

Finding Code by Behavior

grepai search "validate user credentials before login" grepai search "send notification when order is placed" grepai search "calculate total price with discounts" grepai search "retry failed HTTP requests"

Finding Code by Purpose

grepai search "middleware that checks authentication" grepai search "function that formats dates" grepai search "service that sends emails" grepai search "handler for payment processing"

Finding Error Handling

grepai search "handle errors from API calls" grepai search "catch and log exceptions" grepai search "error response to client" grepai search "validation error messages"

Finding Data Operations

grepai search "save user to database" grepai search "query products by category" grepai search "cache frequently accessed data" grepai search "transform data before storage"

Finding Configuration

grepai search "load configuration from environment" grepai search "database connection settings" grepai search "API keys and secrets management" grepai search "feature flags and toggles"

Finding Security Code

grepai search "password hashing and verification" grepai search "input sanitization to prevent injection" grepai search "rate limiting for API endpoints" grepai search "CORS configuration"

Iterative Refinement

If results aren't good, iterate:

Start Broad

grepai search "authentication"

Results too varied

Add Context

grepai search "JWT authentication"

Better, but still broad

Be Specific

grepai search "JWT token validation middleware"

Precise results

Using Synonyms

Semantic search understands synonyms. Try different phrasings:

These may return similar results:

grepai search "user authentication" grepai search "user login verification" grepai search "credential validation" grepai search "identity verification"

Domain-Specific Terms

Use your domain vocabulary:

E-commerce

grepai search "shopping cart checkout process" grepai search "inventory stock management"

Finance

grepai search "transaction processing" grepai search "payment reconciliation"

Healthcare

grepai search "patient record retrieval" grepai search "appointment scheduling"

Question-Style Queries

Natural questions work well:

grepai search "how are users authenticated" grepai search "where is the database connection configured" grepai search "what happens when a request fails" grepai search "how are errors logged"

Avoiding Common Mistakes

❌ Don't Use Exact Function Names

If you know the exact name, use grep:

grep -r "getUserById" . # Text search

GrepAI is for when you don't know the exact name:

grepai search "retrieve user from database" # Semantic search

❌ Don't Be Too Abstract

Too abstract

grepai search "business logic"

More concrete

grepai search "calculate order total with tax"

❌ Don't Use Code Syntax

Don't do this

grepai search "function() { return }"

Do this

grepai search "function that returns early"

❌ Don't Over-Specify

Over-specified (mentions irrelevant details)

grepai search "async function in TypeScript file that uses axios to fetch"

Better

grepai search "fetch data from external API"

Interpreting Results

High Scores (0.85+)

Strong match. The code likely does what you described.

Medium Scores (0.70-0.84)

Related code. May be what you want, or adjacent functionality.

Low Scores (0.60-0.69)

Loosely related. Consider refining your query.

Very Low Scores (<0.60)

Weak match. The concept may not exist in the codebase, or query needs rework.

When GrepAI Doesn't Find Results

• Check the index: grepai status

• Verify files are indexed: Not in ignore patterns?

• Try simpler query: Remove specificity

• Try different words: Use synonyms

• Check if code exists: Maybe it doesn't yet!

Quick Reference Card

Situation Query Style

Know the behavior "validates email format"

Know the domain "payment processing flow"

Exploring "how errors are handled"

Finding entry points "main application startup"

Finding dependencies "where database is connected"

Output Format

Tips summary:

📝 GrepAI Search Tips

✅ DO:

• Describe intent, not implementation
• Use 3-7 descriptive words
• Use English queries
• Iterate and refine

❌ DON'T:

• Use exact function names (use grep)
• Write too short queries ("auth")
• Write too long queries
• Use code syntax in queries

Example transformations: "auth" → "user authentication and login" "getUserById" → "fetch user by ID from database" "handleError" → "error handling and logging"