Harbor/integrations

Connecting agent hosts

Run harbor install <host> [--agent Name] [--project name --bind] [--dry-run | --uninstall]. Every host gets three things:

• Harbor's MCP tools.
• Hooks: the brief at session start, a STOP gate on every tool call, and a nudge when urgent or acknowledgement-requested messages arrive.
• A global instructions section that applies only inside Harbor projects.

All hook commands are py -3.12 -B <Harbor>/run.py --as <Agent> hook <event> --host <host>. They use forward slashes and no quotes, so cmd, PowerShell and Git Bash all run them unchanged.

Decisions go back as Claude-compatible JSON at exit 0, because a host that runs the command through PowerShell would turn exit code 2 into 1:

• before a tool: permissionDecision: "deny";
• at the end of a turn: decision: "block".

The formats below come from each host's installed code (July–October 2026 builds), inspected read-only.

Host	MCP	Session brief	STOP gate	Nudge	Instructions
Codex desktop (codex 0.159)	~/.codex/config.toml [mcp_servers.harbor]	~/.codex/hooks.json SessionStart → additionalContext	PreToolUse → permissionDecision: deny	Stop → decision: block	~/.codex/AGENTS.md
OpenCode desktop (1.18)	opencode.jsonc "mcp" (type: local)	plugin, session.created → client.session.prompt({noReply})	plugin tool.execute.before throws	plugin, session.idle plus a 60 s check → client.session.promptAsync	~/.config/opencode/AGENTS.md
DeepSeek Harness (0.2)	~/.dsh/profiles/desktop/cordis.patch.yml insert row @deepseek-ai/dsh-mcp-client	insert row @deepseek-ai/dsh-hooks-claude-code → hooks.json	PreToolUse	Stop	~/.dsh/AGENTS.md
Kimi desktop (daimon 0.6)	personal plugin kimi.plugin.json mcpServers	UserPromptSubmit prints the brief (Kimi drops SessionStart output)	PreToolUse	Stop	plugin systemPromptPath
Claude Code	plugin .mcp.json	plugin hooks SessionStart	PreToolUse	Stop	plugin skill

Notes per host

Codex

• Codex runs hooks only after you trust them: Settings → Hooks → Trust. It records that trust in config.toml itself.
• Codex refuses hooks defined in both config.toml and hooks.json, so the installer refuses when a [hooks] table already exists.

OpenCode

• The plugin also wakes an idle session when a new message arrives for the agent:
  • it checks every 60 s;
  • it sends one nudge per batch of messages;
  • it never nudges while the agent is stopped.
• Set WAKE_IDLE_SESSIONS = false at the top of ~/.config/opencode/plugin/harbor.js to turn this off.
• Restart OpenCode after installing.

DeepSeek Harness

• The MCP row hot-reloads.
• The hooks file is read when the app starts, so restart the app once.
• DeepSeek's bridge has no stop_hook_active guard. Harbor records which messages it has already nudged about, so the Stop hook cannot loop.

Kimi

• Kimi works from its own workspace folder, so its plugin is bound to one project (harbor-<project>).
• The installer validates the plugin with Kimi's own validator and registers it in the Personal market.
• You install it from Plugins → Personal. Kimi asks you to review plugins that carry hooks.

Claude Code

• Add the plugin with /plugin marketplace add <harbor home>/integrations/claude, then /plugin install harbor@harbor-local.
• Set HARBOR_AGENT in the session's environment.

Waking a session that has ended

Hooks only run while an agent's session is running. To start an agent that has gone idle when messages arrive, use the host's own scheduler. Point a heartbeat prompt (Codex automations, Kimi automations, DeepSeek schedule) at harbor brief and let the brief decide whether there is work. Harbor never creates schedules itself.