Harbor as of 2026-10-05: the coordination hub for the Open Sea's decomp team

Messages, threads, acknowledgements, claims, bands, tasks, review items and
stop flags for a team of AI agents; the chat page and board; host hooks and
MCP server; autopilot; tools/watch.py. Put under version control after the
weekend's changes so they have history and can be rolled back. Local only.

integrations/opencode/harbor.js

@@ -0,0 +1,93 @@
+// Harbor for OpenCode: the STOP gate on every tool call, the brief at the start of each session, and a nudge into
+// an idle session when new Harbor messages arrive for this agent (one nudge per batch of messages, never while
+// stopped). Installed by `harbor install opencode`; the lines between the markers are filled in by the installer.
+import { spawn } from "node:child_process";
+
+// >>> harbor settings >>>
+const AGENT = "OpenCode";
+const PROJECT = null;
+const COMMAND = ["py", "-3.12", "-B", "R:/Workspace/Tools/Harbor/run.py"];
+const WAKE_IDLE_SESSIONS = true;   // check idle sessions every minute and nudge them when messages arrive
+// <<< harbor settings <<<
+
+function harbor(args, payload) {
+  return new Promise((resolve) => {
+    const argv = [...COMMAND.slice(1), "--as", AGENT, ...(PROJECT ? ["--project", PROJECT] : []), ...args];
+    let out = "";
+    let err = "";
+    let child;
+    try {
+      child = spawn(COMMAND[0], argv, { windowsHide: true });
+    } catch (error) {
+      return resolve({ code: 0, out: "", err: String(error) });
+    }
+    const timer = setTimeout(() => { try { child.kill(); } catch {} }, 20000);
+    child.stdout.on("data", (d) => (out += d));
+    child.stderr.on("data", (d) => (err += d));
+    child.on("error", (error) => { clearTimeout(timer); resolve({ code: 0, out: "", err: String(error) }); });
+    child.on("close", (code) => { clearTimeout(timer); resolve({ code: code ?? 0, out, err }); });
+    child.stdin.end(JSON.stringify(payload ?? {}));
+  });
+}
+
+// The Python hook decides what a stopped agent may still run; the plugin only caches "allowed" briefly.
+
+export const HarborPlugin = async ({ client, directory }) => {
+  let gate = { at: 0, blocked: false, reason: "" };
+  const idleSessions = new Set();
+  let checking = false;
+
+  async function nudge(sessionID) {
+    const r = await harbor(["hook", "idle", "--host", "opencode"], { cwd: directory });
+    let info = {};
+    try { info = JSON.parse(r.out || "{}"); } catch {}
+    if (!info.prompt) return false;
+    idleSessions.delete(sessionID);
+    await client.session.promptAsync({ path: { id: sessionID }, body: { parts: [{ type: "text", text: info.prompt }] } });
+    return true;
+  }
+
+  if (WAKE_IDLE_SESSIONS) {
+    setInterval(async () => {
+      if (checking || idleSessions.size === 0) return;
+      checking = true;
+      try {
+        const newest = [...idleSessions].pop();
+        await nudge(newest);
+      } catch {} finally { checking = false; }
+    }, 60000);
+  }
+
+  return {
+    "tool.execute.before": async (input, output) => {
+      const tool = input?.tool ?? "";
+      const args = output?.args ?? {};
+      const now = Date.now();
+      const edits = /edit|write|patch|apply|create|replace/i.test(String(tool));
+      if (gate.blocked || edits || now - gate.at > 2000 || /harbor/i.test(tool + JSON.stringify(args))) {
+        const r = await harbor(["hook", "pre-tool", "--host", "opencode"], { cwd: directory, tool_name: tool, tool_input: args });
+        gate = { at: now, blocked: r.code === 2, reason: r.err.trim() };
+      }
+      if (gate.blocked) throw new Error(gate.reason || "Harbor: STOP in force for this agent. Do not continue work.");
+    },
+    event: async ({ event }) => {
+      try {
+        if (event?.type === "session.created") {
+          const id = event.properties?.info?.id ?? event.properties?.sessionID;
+          if (!id) return;
+          const r = await harbor(["hook", "session-start", "--host", "generic"], { cwd: directory });
+          const text = r.out.trim();
+          if (text) await client.session.prompt({ path: { id }, body: { noReply: true, parts: [{ type: "text", text }] } });
+        } else if (event?.type === "session.idle") {
+          const id = event.properties?.sessionID;
+          if (!id) return;
+          idleSessions.delete(id);
+          idleSessions.add(id);
+          if (!(await nudge(id))) await harbor(["hook", "turn-end", "--host", "opencode"], { cwd: directory });
+        } else if (event?.type === "session.status" && event.properties?.status?.type === "busy") {
+          idleSessions.delete(event.properties?.sessionID);
+        }
+      } catch {}
+    },
+  };
+};