yoanbernabeu grepai: ranked semantic search (not a Grep replacement)
grepai search answers a natural-language query with ~10 scored chunks in one
call — a ranked starting point at a fraction of the tokens of dumping raw grep
output (--json --compact alone saves ~80%). It is a ranking layer, not an
exhaustive one: a vector top-10 can miss a relevant file that keyword grep
finds trivially. The rules below save tokens without losing recall.
Tool Choice
| Query | Tool |
|---|---|
| Exact identifiers, imports, string literals | built-in Grep / git grep — fastest, exhaustive |
Intent with a canonical syntax anchor (@main, func main(, class AppDelegate) |
Grep the anchor — many "intent" questions are exact-match queries in disguise |
| Intent with no obvious anchor ("where are errors handled?") | recall-safe combo below |
| Function relationships (callers/callees) | grepai trace — grep has no equivalent |
File patterns (**/*.go) |
Glob |
Recall-Safe Combo (cheap AND exhaustive)
grep's token cost is in dumping content lines; its recall is nearly free when you ask for file names only. For an intent query, run both cheap layers:
# 1. Ranking: ~10 scored chunks, one call
grepai search "where errors are handled and logged" --json --compact
# 2. Recall: exhaustive candidate checklist — file NAMES only, ~zero tokens
git grep -ilE 'error|handl|logg' | head -50
Read grepai's top hits first, then scan the checklist for relevant-looking files grepai did not rank — read those too. Never dump full grep content output for an intent query; the file list gives you grep's recall at ~1% of the tokens.
If grepai's top hits are docs/reports instead of code: scope with
grepai search "<query>" --path <srcdir>, or add generated content to a
.grepaiignore.
How to Use This Skill
Semantic Search
Use grepai search to find code by describing what it does:
# Search with natural language (ALWAYS use English for best results)
grepai search "user authentication flow"
grepai search "error handling middleware"
grepai search "database connection pooling"
grepai search "API request validation"
# JSON output for AI agents (--compact saves ~80% tokens)
grepai search "authentication flow" --json --compact
# Limit results
grepai search "error handling" -n 5
Call Graph Tracing
Use grepai trace to understand function relationships:
# Find all functions that CALL a symbol
grepai trace callers "HandleRequest" --json
# Find all functions CALLED BY a symbol
grepai trace callees "ProcessOrder" --json
# Build complete call graph (both directions)
grepai trace graph "ValidateToken" --depth 3 --json
Query Best Practices
Do:
grepai search "How are file chunks created and stored?"
grepai search "Vector embedding generation process"
grepai search "Configuration loading and validation"
grepai trace callers "Search" --json
Don't:
grepai search "func" # Too vague
grepai search "error" # Too generic
grepai search "HandleRequest" # Use Grep for exact matches
Recommended Workflow
- Start with
grepai searchfor ranked starting points - Add
git grep -ilE '<keywords>'for the exhaustive file checklist (names only) - Use
grepai traceto understand function relationships - Use
Readon ranked hits first, then on relevant checklist files grepai did not rank
Fallback
If grepai fails (not running, index unavailable, or errors), fall back to standard Grep/Glob tools. Common issues:
- Index not built: Run
grepai watchto build/update the index - Embedder not available: Check that Ollama is running or OpenAI API key is set
Keywords
semantic search, code search, natural language search, find code, explore codebase, call graph, callers, callees, function relationships, code understanding, intent search, code exploration, recall, token savings