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feat(host): run demo mode in the installed app from a demo.json in its home #536

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Merged
iamnbutler merged 2 commits into from
Oct 20, 2026
Merged

feat(host): run demo mode in the installed app from a demo.json in its home #536

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feat(host): run demo mode in the installed app from a demo.json in it…
iamnbutler Oct 20, 2026
18b2ddc
chore: confirm lane notes
iamnbutler Oct 20, 2026
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6 changes: 3 additions & 3 deletions ...s/host/src/helper.ts/01M4V5N7FNEDME70ADSQF5H00A-helpers-must-stay-first-on-t.md
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Expand Up @@ -4,9 +4,9 @@ anchor: '@file'
created: 2026-10-13T17:41:10Z
norm: '1'
sig: 4b03c8eb05d682d4
body_hash: adbd543604639735
raw_hash: e46f8fb89f55f772
vouched: 2026-10-15T14:10:43Z
body_hash: c6a92431f39aeeb2
raw_hash: ab581bbaf4052fed
vouched: 2026-10-20T18:47:51Z
lines: 1-39
---

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6 changes: 4 additions & 2 deletions apps/host/src/helper.ts
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@@ -1,5 +1,5 @@
import { Console } from "node:console";
import { createWriteStream, mkdirSync } from "node:fs";
import { createWriteStream, existsSync, mkdirSync } from "node:fs";
import { basename, dirname, join } from "node:path";

import { adoptLoginShell } from "./environment";
Expand Down Expand Up @@ -37,7 +37,9 @@ if (cli) {
console.log(`${new Date().toISOString()} Ace Helper starting`);
try {
const { serve } = await import("./gateway");
await serve(config.port);
// The installed app takes no flags, so a demo script in its home stands in for --demo.
const demo = join(config.home, "demo.json");
await serve(config.port, false, existsSync(demo) ? demo : undefined);
} catch (error) {
console.error(error);
log.end(() => process.exit(1));
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3 changes: 3 additions & 0 deletions docs/demo.md
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Expand Up @@ -6,6 +6,9 @@ channel requests, which each channel admits by its own rules: an ask needs the c
access on, as a real teammate's would. Only their identities are made up, and only in the owner's
own app; the directory, lobbies and peers never see them.

The installed app runs demo mode when its home holds `demo.json`, such as
`~/.local/state/ace-canary/demo.json` for Canary; restart Ace after adding or removing it.

Seed the channels first with `ace import` (see [channel data](data.md#seeds)).

```json
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