How do I install the Osgrep skill?

Run npx skillmds@latest add hasparus/osgrep in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Which AI agents work with Osgrep?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Osgrep free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under Apache-2.

Who published Osgrep?

hasparus (@hasparus) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Osgrep by hasparus — Agent Skill

Name: Osgrep
Author: hasparus

Osgrep

Semantic code search using natural language queries. Use when users ask "where is X implemented", "how does Y work", "find the logic for Z", or need to locate code by concept rather than exact text. Returns file paths with line numbers and code snippets.

hasparus Updated Sep 17, 2026

File contents

When to Use

Use this to find code by concept or behavior (e.g., "where is auth validated", "how are plugins loaded"). Note: This tool prioritizes finding the right files and locations in the code. Snippets are truncated (max 16 lines) and are often just previews.

Example:

osgrep "how are plugins loaded"
osgrep "how are plugins loaded" packages/transformers.js/src

Strategy for Different Query Types

For Architectural/System-Level Questions (auth, LSP integration, file watching)

Search Broadly First: Use a conceptual query to map the landscape.
- osgrep "authentication authorization checks"
Survey the Results: Look for patterns across multiple files:
- Are checks in middleware? Decorators? Multiple services?
- Do file paths suggest different layers (gateway, handlers, utils)?
Read Strategically: Pick 2-4 files that represent different aspects:
- Read the main entry point
- Read representative middleware/util files
- Follow imports if architecture is unclear
Refine with Specific Searches: If one aspect is unclear:
- osgrep "session validation logic"
- osgrep "API authentication middleware"

For Targeted Implementation Details (specific function, algorithm)

Search Specifically: Ask about the precise logic.
- osgrep "logic for merging user and default configuration"
Evaluate the Semantic Match:
- Does the snippet look relevant?
- Crucial: If it ends in ... or cuts off mid-logic, read the file.
One Search, One Read: Use osgrep to pinpoint the best file, then read it fully.

Output Format

Returns: path/to/file:line [Tags] Code Snippet

[Definition]: Semantic search detected a class/function here. High relevance.
...: Truncation Marker. Snippet is incomplete—use read_file for full context.

Tips

Trust the Semantics: You don't need exact names. osgrep "how does the server start" works better than guessing osgrep "server.init".
Watch for Distributed Patterns: If results span 5+ files in different directories, the feature is likely architectural—survey before diving deep.
Scope When Possible: Use path constraints to focus: osgrep "auth" src/server/
Don't Over-Rely on Snippets: For architectural questions, snippets are signposts, not answers. Read the key files.
"Still Indexing...": If you see this, please stop, alert the user that the index is ongoing and ask them if they wish to proceed. Results will be partial until the index is complete.

---name: osgrepdescription: Semantic code search using natural language queries. Use when users ask "where is X implemented", "how does Y work", "find the logic for Z", or need to locate code by concept rather than exact text. Returns file paths with line numbers and code snippets.license: Apache-2.0---## When to UseUse this to find code by **concept** or **behavior** (e.g., "where is auth validated", "how are plugins loaded").*Note: This tool prioritizes finding the right files and locations in the code. Snippets are truncated (max 16 lines) and are often just previews.*Example:```bashosgrep "how are plugins loaded"osgrep "how are plugins loaded" packages/transformers.js/src```## Strategy for Different Query Types### For **Architectural/System-Level Questions** (auth, LSP integration, file watching)1. **Search Broadly First:** Use a conceptual query to map the landscape. * `osgrep "authentication authorization checks"`2. **Survey the Results:** Look for patterns across multiple files: * Are checks in middleware? Decorators? Multiple services? * Do file paths suggest different layers (gateway, handlers, utils)?3. **Read Strategically:** Pick 2-4 files that represent different aspects: * Read the main entry point * Read representative middleware/util files * Follow imports if architecture is unclear4. **Refine with Specific Searches:** If one aspect is unclear: * `osgrep "session validation logic"` * `osgrep "API authentication middleware"`### For **Targeted Implementation Details** (specific function, algorithm)1. **Search Specifically:** Ask about the precise logic. * `osgrep "logic for merging user and default configuration"`2. **Evaluate the Semantic Match:** * Does the snippet look relevant? * **Crucial:** If it ends in `...` or cuts off mid-logic, **read the file**.3. **One Search, One Read:** Use osgrep to pinpoint the best file, then read it fully.## Output FormatReturns: `path/to/file:line [Tags] Code Snippet`- `[Definition]`: Semantic search detected a class/function here. High relevance.- `...`: **Truncation Marker**. Snippet is incomplete—use `read_file` for full context.## Tips- **Trust the Semantics:** You don't need exact names. `osgrep "how does the server start"` works better than guessing `osgrep "server.init"`.- **Watch for Distributed Patterns:** If results span 5+ files in different directories, the feature is likely architectural—survey before diving deep.- **Scope When Possible:** Use path constraints to focus: `osgrep "auth" src/server/`- **Don't Over-Rely on Snippets:** For architectural questions, snippets are signposts, not answers. Read the key files.- **"Still Indexing...":** If you see this, please stop, alert the user that the index is ongoing and ask them if they wish to proceed. Results will be partial until the index is complete.

Frequently asked questions