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Agent skill

Osgrep

by pr-pm in pr-pm/prpm

Semantic code search using natural language queries. An agent skill from pr-pm/prpm.

Apache-2.0Auto-check passedDevelopment

Install Osgrep

skills CLI
$ npx skills add pr-pm/prpm --skill osgrep -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install pr-pm/prpm osgrep --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/pr-pm/prpm.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/osgrep-skill .claude/skills/osgrep && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
osgrep
GitHub stars
122
Token cost
~731 tokens
SKILL.md length
331 words
Files
1
Skills in repo
35
Repo updated
First seen
Licence
Apache-2.0

At a glance

Semantic code search using natural language queries. An agent skill from pr-pm/prpm.

  • Works in 4 steps: Search Broadly First: Use a conceptual… → Survey the Results: Look for patterns… → Read Strategically: Pick 2-4 files that… → …
  • Users ask where is X implemented
  • SKILL.md covers When to Use, Strategy for Different Query…, Output Format and Tips
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Osgrep is an agent skill from pr-pm/prpm. 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.

Its SKILL.md is about 730 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Codebase onboarding. The repository describes itself as: The universal registry for AI coding tools. The licence is Apache-2.0.

When your agent uses it

  • Users ask where is X implemented
  • How does Y work
  • Find the logic for Z
  • Need to locate code by concept rather than exact text

Example prompts

  • “where is X implemented”
  • “how does Y work”
  • “find the logic for Z”
  • “/osgrep”

Requirements

  • Pre-approved tools (allowed-tools): Bash(osgrep:*), Read

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Search Broadly First: Use a conceptual query to map the landscape.
  2. Survey the Results: Look for patterns across multiple files
  3. Read Strategically: Pick 2-4 files that represent different aspects
  4. Refine with Specific Searches: If one aspect is unclear

What it can do on your machine

Read from SKILL.md and the folder at commit 5f993e6. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Bash(osgrep:*)
    • Read

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Osgrep loads about 731 tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 331 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~65
When it runs · the whole SKILL.md, loaded when a task matches
~731

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from pr-pm/prpm at commit 5f993e6, republished under its Apache-2.0 licence (© pr-pm). 331 words, ~731 tokens.

Download SKILL.mdSave it as .claude/skills/osgrep/SKILL.md (or your agent's skills folder).
name
osgrep
description
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.
allowed-tools
Bash(osgrep:*), Read
license
Apache-2.0

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:

bash
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)
  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 unclear
  4. 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 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.

© pr-pm, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/osgrep-skill of pr-pm/prpm.

Open the folder on GitHubat commit 5f993e6

Compare with similar skills

Osgrep next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Osgrep compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Osgrep this skillpr-pm/prpm122—~731Automated safety check: PassApache-2.0
Codebase Knowledge Graph Q&AEgonex-AI/Understand-Anything85k1 repos~1.2kAutomated safety check: PassMIT
Understand ExplainEgonex-AI/Understand-Anything85k1 repos~1.3kAutomated safety check: PassMIT
Repomix Codebase Exploreryamadashy/repomix29k1 repos~2.7kAutomated safety check: PassMIT
Project Onboarding Guide from Knowledge GraphEgonex-AI/Understand-Anything85k—~1.2kAutomated safety check: PassMIT
Deepwiki Rssopaco/deepwiki-rs3.1k—~748Automated safety check: PassMIT

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Categories

Questions about Osgrep

What does Osgrep do?

Semantic code search using natural language queries. An agent skill from pr-pm/prpm. Osgrep is an agent skill from pr-pm/prpm. Semantic code search using natural language queries.

When should I use Osgrep?

Osgrep fits situations like: users ask where is X implemented; how does Y work; find the logic for Z; need to locate code by concept rather than exact text.

How do I install Osgrep in Claude Code?

Run `npx skills add pr-pm/prpm --skill osgrep -a claude-code`. Or copy the skill folder (.claude/skills/osgrep-skill in pr-pm/prpm) into .claude/skills/osgrep in your project. Claude Code loads it when a task matches its description.

How do I install Osgrep in Codex?

Run `npx skills add pr-pm/prpm --skill osgrep -a codex`. Or copy the skill folder (.claude/skills/osgrep-skill in pr-pm/prpm) into .agents/skills/osgrep in your project. Codex loads it when a task matches its description.

Can I use Osgrep in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add pr-pm/prpm --skill osgrep -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/osgrep, .gemini/skills/osgrep, .github/skills/osgrep and .opencode/skills/osgrep in your project.

What does Osgrep need to run?

SKILL.md names no scripts, command-line tools or credentials: Osgrep is instructions for the agent only. Its frontmatter pre-approves these tools: Bash(osgrep:*), Read.

Does Osgrep access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Osgrep safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Osgrep use?

Osgrep is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Osgrep use?

About 731 tokens (SKILL.md is roughly 2.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Osgrep?

Skills that share tags, products or a category with Osgrep: Codebase Knowledge Graph Q&A (Egonex-AI/Understand-Anything, 85k stars), Understand Explain (Egonex-AI/Understand-Anything, 85k stars), Repomix Codebase Explorer (yamadashy/repomix, 29k stars) and Project Onboarding Guide from Knowledge Graph (Egonex-AI/Understand-Anything, 85k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Osgrep?

pr-pm (a GitHub organization) maintains it in pr-pm/prpm, which has 122 GitHub stars. The repository holds 35 skills in this directory. The repository was last updated on October 6, 2026.

Source: pr-pm/prpm on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.