oh-my-opencode-slim/docs/tools.md

Tools & Capabilities

Built-in tools available to agents beyond the standard file and shell operations.

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Background Tasks

Launch agents asynchronously and collect results later. This is how the Orchestrator runs Explorer, Librarian, and other sub-agents in parallel without blocking.

Tool	Description
background_task	Launch an agent in a new session. sync=true blocks until complete; sync=false returns a task ID immediately
background_output	Fetch the result of a background task by ID
background_cancel	Abort a running background task

Background tasks integrate with Multiplexer Integration — when multiplexer support is enabled, each background task spawns a pane so you can watch it live.

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LSP Tools

Language Server Protocol integration for code intelligence across 30+ languages. OpenCode ships pre-configured LSP servers for TypeScript, Python, Rust, Go, and more.

Tool	Description
lsp_goto_definition	Jump to a symbol's definition
lsp_find_references	Find all usages of a symbol across the workspace
lsp_diagnostics	Get errors and warnings from the language server
lsp_rename	Rename a symbol across all files atomically

See the official OpenCode docs for the full list of built-in LSP servers and their requirements.

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Code Search Tools

Fast, structural code search and refactoring — more powerful than plain text grep.

Tool	Description
grep	Fast content search using ripgrep
ast_grep_search	AST-aware code pattern matching across 25 languages
ast_grep_replace	AST-aware code refactoring with dry-run support

ast_grep understands code structure, so it can find patterns like "all arrow functions that return a JSX element" rather than relying on exact text matching.

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Formatters

OpenCode automatically formats files after they are written or edited, using language-specific formatters. No manual step needed.

Includes Prettier, Biome, gofmt, rustfmt, ruff, and 20+ others.

See the official OpenCode docs for the complete list.