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Semantic code search using mgrep for efficient codebase exploration. This skill should be used when searching or exploring codebases with more than 30 non-gitignored files and/or nested directory structures. It provides natural language semantic search that complements traditional grep/ripgrep for finding features, understanding intent, and exploring unfamiliar code.
Passed 19 of 20 test cases with the skill, and 5 of 20 without it.
and 21 more in the full report
16 fixed5 passed either way1 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 15 test cases the skill fixed. Same model, same prompt, with and without the skill.
Provide the long-form command option used to update the local code search index immediately before running a search query.
| Checked | Without skill | With skill |
|---|---|---|
| Specifies --sync as the long option. | Missed | Passed |
The instructions your model reads when the skill loads.
--|-------------|
| -m <count> | Maximum results (default: 10) |
| -c, --content | Display full result content |
| -a, --answer | Generate AI-powered synthesis of results |
| -s, --sync | Update index before searching |
| --no-rerank | Disable relevance optimisation |
# Get more results
bunx @mixedbread/mgrep -m 25 "user authentication flow"
# Show full content of matches
bunx @mixedbread/mgrep -c "error handling patterns"
# Get an AI-synthesised answer
bunx @mixedbread/mgrep -a "how does the caching layer work?"
# Sync index before searching
bunx @mixedbread/mgrep -s "payment processing" src/services
Start watcher (once per session or when files change significantly):
bunx @mixedbread/mgrep watch
Search semantically:
bunx @mixedbread/mgrep "what you're looking for" [optional/path]
Refine as needed using path constraints or options:
bunx @mixedbread/mgrep -m 20 -c "refined query" src/specific/directory
test cases passed, vs 5 / 20 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.