fix(host): refuse a second host on the same home, and close terminals for CLI archive, kill and delete

.lane/memory/apps/host/src/cli.ts/01M4YY5SXJFQK8VXT78X1E0KAE-every-command-but-serve-must.md

@@ -4,9 +4,9 @@ anchor: function main
 created: 2026-10-15T04:47:23Z
 norm: '1'
 sig: 7d5d3f63a3bddde4
-body_hash: e48607de6d665818
-raw_hash: a6282bc5158525e4
-vouched: 2026-10-22T15:17:06Z
+body_hash: 2189bea8448ae31b
+raw_hash: 1b839377f7aa43ec
+vouched: 2026-10-22T15:20:51Z
 lines: 253-482
 ---
 

.lane/memory/apps/host/src/cli.ts/01M5J0BZWP8SCBK522YT2HMZDZ-ace-info-prints-agent-access.md

@@ -4,9 +4,9 @@ anchor: function main
 created: 2026-10-22T14:31:16Z
 norm: '1'
 sig: 7d5d3f63a3bddde4
-body_hash: e48607de6d665818
-raw_hash: a6282bc5158525e4
-vouched: 2026-10-22T15:17:07Z
+body_hash: 2189bea8448ae31b
+raw_hash: 1b839377f7aa43ec
+vouched: 2026-10-22T15:20:51Z
 lines: 332-614
 ---
 

.lane/memory/apps/host/src/gateway.ts/01M4YT9Z8YJ2ZWZCVB752WDCFF-workers-and-agent-shells-fin.md

@@ -4,9 +4,9 @@ anchor: function serve
 created: 2026-10-15T03:39:45Z
 norm: '1'
 sig: 171797818ef4d836
-body_hash: 1332a8dc2a8a58e7
-raw_hash: 99138b0aa8226285
-vouched: 2026-10-22T15:02:43Z
+body_hash: 6333f6a695d3ff98
+raw_hash: ad0574ab5dfd2999
+vouched: 2026-10-22T15:20:51Z
 lines: 668-751
 ---
 

.lane/memory/apps/host/src/gateway.ts/01M4ZH1NMBK54TCB970R3AJ1X1-a-loopback-host-must-not-cal.md

@@ -4,9 +4,9 @@ anchor: function serve
 created: 2026-10-15T10:17:10Z
 norm: '1'
 sig: 171797818ef4d836
-body_hash: 1332a8dc2a8a58e7
-raw_hash: 99138b0aa8226285
-vouched: 2026-10-22T15:02:43Z
+body_hash: 6333f6a695d3ff98
+raw_hash: ad0574ab5dfd2999
+vouched: 2026-10-22T15:20:51Z
 lines: 830-948
 supersedes: 01M4Z2R1HEVDKEA8VEJ7XRJQ8F
 ---

.lane/memory/apps/host/src/gateway.ts/01M5D4BXMERGZ1EZ3EYAFM3YC4-worker-requests-worker-never.md

@@ -4,9 +4,9 @@ anchor: '@file'
 created: 2026-10-20T17:04:56Z
 norm: '1'
 sig: 1acdc0f6a0895ac5
-body_hash: 38cce3f1f25177dd
-raw_hash: e92b21447ef6a159
-vouched: 2026-10-22T15:09:48Z
+body_hash: 2c286a27ab7e9d25
+raw_hash: 0da8b2103ee9b539
+vouched: 2026-10-22T15:20:51Z
 lines: 1-1153
 ---
 

.lane/memory/apps/host/src/gateway.ts/01M5HYM54QCSF4ESXJSWZK588G-every-project-op-that-change.md

@@ -4,9 +4,9 @@ anchor: '@file'
 created: 2026-10-22T14:00:47Z
 norm: '1'
 sig: 1acdc0f6a0895ac5
-body_hash: 38cce3f1f25177dd
-raw_hash: e92b21447ef6a159
-vouched: 2026-10-22T15:09:55Z
+body_hash: 2c286a27ab7e9d25
+raw_hash: 0da8b2103ee9b539
+vouched: 2026-10-22T15:20:51Z
 lines: 1-1309
 ---
 

.lane/memory/apps/host/src/gateway.ts/01M5J36RXR2GN6T4P61RJKG55Y-serve-checks-ace-home-host-p.md

@@ -0,0 +1,12 @@
+---
+id: 01M5J36RXR2GN6T4P61RJKG55Y
+anchor: function claim
+created: 2026-10-22T15:20:51Z
+norm: '1'
+sig: fe5a25627e23d6bd
+body_hash: dffc6420f4a82617
+raw_hash: 5e5be372f64ebf07
+lines: 1172-1183
+---
+
+serve checks $ACE_HOME/host.port before resume() and writes it after listen; a second host on another port must refuse while the first still answers /health with the same home

apps/host/src/cli.ts

@@ -604,6 +604,14 @@ async function main() {
 		case "fork":
 			return console.log((await fork(record.id, catalog.user)).name);
 		case "kill":
+			// A running host owns the channel's terminals and closes them with it, as for the app.
+			if (await isHostRunning()) {
+				return void (await local({
+					op: "channel",
+					channel: record.id,
+					request: { op: "kill", author: catalog.user },
+				}));
+			}
 			return kill(record.id);
 		case "move": {
 			// `--hosted <url>` only finishes a move to a hosting service that an earlier version started.
@@ -639,11 +647,16 @@ async function main() {
 			);
 		}
 		case "archive":
-			return void (await archive(record.id, true));
-		case "unarchive":
-			return void (await archive(record.id, false));
+		case "unarchive": {
+			const archived = command === "archive";
+			if (await isHostRunning()) {
+				return void (await local({ op: "archive", channel: record.id, archived }));
+			}
+			return void (await archive(record.id, archived));
+		}
 		case "delete":
-			await remove(record.id);
+			if (await isHostRunning()) await local({ op: "delete", channel: record.id });
+			else await remove(record.id);
 			return console.log(`Deleted ${record.name}. Its lane branches remain in ${record.project}.`);
 	}
 }

apps/host/src/gateway.ts

@@ -19,7 +19,7 @@ import * as served from "./directory-server";
 import { retryLoginShell, shell } from "./environment";
 import type { GatewayClient, Watch } from "./gateway-client";
 import * as github from "./github";
-import { health, HostConflict } from "./health";
+import { describe, health, HostConflict } from "./health";
 import { seal } from "./keys";
 import * as lobby from "./lobby";
 import { failure, log, open as openLog } from "./log";
@@ -1165,6 +1165,23 @@ async function listen(port: number): Promise<Server<Client>> {
 	}
 }
 
+/** The port of the host serving this home, so a second host on another port finds it. */
+const SERVED = () => join(config.home, "host.port");
+
+/** Two hosts on one home would run the same channels' workers and stores twice; the first keeps it. */
+async function claim(port: number) {
+	const held = Number(await Bun.file(SERVED()).text().catch(() => ""));
+	if (!held || held === port) return;
+	const info = await health(held).catch((error) =>
+		error instanceof HostConflict ? error : undefined
+	);
+	if (info?.home !== config.home) return;
+	const listener = info instanceof HostConflict ? info.listener : describe(info);
+	throw new Error(
+		`${config.home} is already served by ${listener.text} on port ${held}. Stop it, or set ACE_HOME to give this host its own data directory.`,
+	);
+}
+
 /**
  * `loopback` keeps a disposable host off the team: no tailnet listener, peer discovery, directory
  * entry, or lobby presence. A second host on this machine would otherwise publish under the
@@ -1178,8 +1195,10 @@ export async function serve(port: number, loopback = false, script?: string): Pr
 	// Hosted channels run tools in this process.
 	seal();
 	openLog("host");
+	await claim(port);
 	await resume();
 	const server = await listen(port);
+	await Bun.write(SERVED(), String(server.port));
 	log("info", "host.start", { port: server.port, user: catalog.user, bun: Bun.version });
 	if (shell.state === "pending") {
 		log("warn", "host.shell", { error: shell.error });