Cheat Sheet

OpenCode

Open-source AI coding agent, terminal-native

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Installation

curl -fsSL https://opencode.ai/install | shInstall OpenCode (Linux/macOS)

brew install opencodeInstall via Homebrew (macOS)

opencodeLaunch the TUI

opencode upgradeUpgrade to the latest version

opencode --versionShow installed version

TUI Keybindings

EnterSend message to agent

Ctrl+EnterInsert new line in input

EscapeCancel current operation / go back

Ctrl+CCopy selected text / quit

Ctrl+ZUndo last file change

Ctrl+YRedo last undone change

/Focus command input / search

TabCycle focus between panels

Session Commands

/mode planSwitch to Plan mode (read-only analysis)

/mode buildSwitch to Build mode (write file changes)

@filenameAttach a file to the prompt

/undoRevert last AI file changes

/sharePublish session as a shareable URL

/clearClear conversation history

/modelSwitch AI model mid-session

/compressCompress conversation to save context

Context & Memory

AGENTS.mdProject instructions (cross-agent standard)

opencode.jsonProject configuration file

~/.config/opencode/config.jsonGlobal user configuration

Plan modeAnalyze codebase without writing files

Build modeApply AI-generated changes to codebase

$rules in configDefine custom instruction rules

Provider Configuration

ANTHROPIC_API_KEY=...Set Claude (Anthropic) API key

OPENAI_API_KEY=...Set OpenAI API key

GOOGLE_API_KEY=...Set Google Gemini API key

provider: "anthropic"Set default provider in config

model: "claude-sonnet-4-6"Set default model in config

OpenCode ZenManaged model subscription (no API keys)

providers: [...]Multi-provider config in opencode.json

MCP

mcp.servers in opencode.jsonConfigure MCP server list

type: "local"Subprocess (stdio) MCP transport

type: "remote"HTTP/SSE remote MCP transport

mcp auth <server>OAuth flow for remote MCP server

args: [...]MCP server command arguments

env: {...}MCP server environment variables

opencode mcp listList all active MCP servers

code-agents.oday-bakkour.com · OpenCode · Last verified: April 2026