# Arc Search > Semantic and full-text search across indexed collections. Use when user mentions searching a collection, semantic search, vector search, knowledge base, or finding content in indexed code, markdown, or PDFs. Use when this capability is needed. - Skill: `tomevault-io/arc-search` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/arc-search` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/arc-search/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Docs & Writing - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/arc-search --- ```bash arc collection list # list collections arc search semantic "query" --corpus NAME --limit 10 # conceptual queries arc search semantic "query" --corpus A --corpus B # multi-corpus search arc search text "query" --corpus NAME --limit 10 # exact terms ``` Options: `--json` for structured output, `--filter "key=value"` for metadata filtering. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/cwensel) — claim your Tome and manage your conversions.