splash

SplashAgents over ACP

Bring the agent you already use.

Splash speaks the Agent Client Protocol, the JSON-RPC protocol editors use to talk to coding agents. Splash never installs them or signs in for you: install and authenticate each CLI yourself, and Splash finds it.

AgentLaunch commandKind
Claude Code npx -y @agentclientprotocol/claude-agent-acp@0.81.1 Adapter
Codex npx -y @agentclientprotocol/codex-acp@1.13.1 Adapter
Glue glue acp Native ACP
Autohand npx -y @autohandai/autohand-acp@0.2.1 Adapter
Copilot copilot --acp Native ACP
Devin devin acp Native ACP
Dirac dirac --acp Native ACP
Droid droid exec --output-format acp-daemon Native ACP
Gemini gemini --acp Native ACP
Goose goose acp Native ACP
Hermes hermes acp Native ACP
Junie junie --acp=true Native ACP
Kimi kimi acp Native ACP
Letta npx -y @letta-ai/letta-acp@0.1.11 Adapter
OpenCode opencode acp Native ACP
OpenHands openhands acp Native ACP
Pi npx -y pi-acp@0.0.33 Adapter
Pool pool acp Native ACP
Vibe vibe-acp Native ACP

Launch commands and pinned adapter versions come from src/agents/registry.rs. The npx entries are adapters around the vendor's CLI; the rest are the CLIs' own ACP modes.

Check before you trust

A connection test that sends no prompt.

Each agent's settings page shows whether it's installed, its version, and whether a real ACP handshake succeeded on this machine. Detecting a CLI on your PATH alone is not proof that it works.

  • Add extra launch arguments per agent.
  • Read each agent's skills, commands and MCP servers.
  • Sign-in state is detected for Claude Code, Codex, Glue and Pool; for the others, the connection test shows it.

How agents run

A child process per session

Splash runs the launch command in the session folder, in its own process group, with your login shell’s PATH. Stdin and stdout carry ACP.

Native PATH lookup everywhere

Windows uses PATH and PATHEXT, including npm .cmd launchers. Arguments are passed separately, never through a shell string.

Cleaned up on quit

Quitting Splash ends every agent and shell process group, including on SIGTERM, SIGINT and SIGHUP, though not after a crash or SIGKILL. Windows uses kill-on-close Job Objects.

Capabilities vary

Agents report different things: models, modes, commands, usage. Splash shows a control only when the agent offers it.