settings: the assistant's daemon config, tools, and Ask presets

Two settings pages for desktop-assistant.

Assistant edits the daemon's config.toml: server, temperature, tool
rounds, thinking, the system prompt, and the [env] values its tools
read; a switch per tool renames tools/<name>.toml to .toml.off, which
the daemon's glob skips. The daemon reads all of it at startup only, so
the page says when a change is pending and Restart runs assistant.sh
restart, showing its status when the daemon does not come back.

The file is edited line by line, like autostart.lua, so the comments
the example ships with survive: unset keys stay commented out in place.
Every write parses the whole new file with tomllib first and replaces
the old one atomically, so no edit can leave a config the daemon will
not start with. Defaults are read from assistant.py --defaults rather
than copied into QML.

Ask presets edits the canvas's canned questions, which Prefs already
stored for exactly this page: label, question, and the kinds each is
offered for. They apply live.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/desktop/modules/assistant/test_config.js b/desktop/modules/assistant/test_config.js
new file mode 100644
index 0000000..cc610a8
--- /dev/null
+++ b/desktop/modules/assistant/test_config.js
@@ -0,0 +1,89 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Run: node desktop/modules/assistant/test_config.js
+// Config.js is a QML library, so its .pragma line is stripped before node
+// evaluates it.
+
+const fs = require("fs");
+const assert = require("assert");
+
+const src = fs.readFileSync(__dirname + "/Config.js", "utf8")
+    .replace(/^\.pragma library$/m, "");
+const C = new Function(src + "\nreturn { scalars, setScalar, env, setEnv, quote };")();
+
+const KEYS = ["llm", "system", "tool_rounds", "temperature", "thinking"];
+const file = [
+    "# desktop-assistant configuration.",
+    "# Style name = weight; prose with an equals sign",
+    "",
+    '# llm = "http://localhost:8181/v1"    # llama-server, OpenAI API',
+    '# system = "You are a voice assistant. ..."',
+    "temperature = 0.6                    # per request; unset = the preset's",
+    "",
+    "# [whisper]",
+    "# port = 8182",
+    "",
+    "[env]",
+    'SEARXNG_URL = "http://search.example.org"   # a # inside a comment',
+    'MD_EDITOR = "typora"',
+    '# WEATHER_ENV = "/home/you/x"',
+    "",
+].join("\n");
+
+// Only active keys have values; prose and commented keys do not.
+assert.deepStrictEqual(C.scalars(file, KEYS), { temperature: 0.6 });
+assert.deepStrictEqual(C.env(file), [
+    { key: "SEARXNG_URL", value: "http://search.example.org" },
+    { key: "MD_EDITOR", value: "typora" },
+]);
+
+// Setting an active key keeps its inline comment.
+let t = C.setScalar(file, "temperature", "0.2");
+assert.strictEqual(t.split("\n")[5], "temperature = 0.2                    # per request; unset = the preset's");
+// Unsetting comments it out in place, and it reads as unset.
+t = C.setScalar(file, "temperature", null);
+assert.strictEqual(t.split("\n")[5], "# temperature = 0.6                    # per request; unset = the preset's");
+assert.deepStrictEqual(C.scalars(t, KEYS), {});
+// Setting a commented key activates its line rather than adding one.
+t = C.setScalar(file, "llm", C.quote("http://box:8080/v1"));
+assert.strictEqual(t.split("\n")[3], 'llm = "http://box:8080/v1"    # llama-server, OpenAI API');
+assert.strictEqual(t.split("\n").length, file.split("\n").length);
+// A key nowhere in the file lands before the first table, not inside it.
+t = C.setScalar(file, "thinking", "false");
+const lines = t.split("\n");
+assert.ok(lines.indexOf("thinking = false") < lines.indexOf("[env]"));
+assert.strictEqual(C.scalars(t, KEYS).thinking, false);
+// The prose line with "=" is never treated as a key.
+assert.strictEqual(C.setScalar(file, "name", null), file);
+
+// Strings round-trip with quotes, backslashes and newlines.
+const tricky = 'Say "hi"\\now\nline two\ttab';
+t = C.setScalar(file, "system", C.quote(tricky));
+assert.strictEqual(C.scalars(t, KEYS).system, tricky);
+assert.strictEqual(t.split("\n").length, file.split("\n").length);
+
+// env: replace, remove, add after the last active entry.
+t = C.setEnv(file, "MD_EDITOR", "xdg-open");
+assert.deepStrictEqual(C.env(t)[1], { key: "MD_EDITOR", value: "xdg-open" });
+t = C.setEnv(file, "SEARXNG_URL", null);
+assert.deepStrictEqual(C.env(t).map(e => e.key), ["MD_EDITOR"]);
+t = C.setEnv(file, "CALENDAR_DIR", "/home/you/cal");
+assert.deepStrictEqual(C.env(t).map(e => e.key), ["SEARXNG_URL", "MD_EDITOR", "CALENDAR_DIR"]);
+assert.strictEqual(t.split("\n")[13], 'CALENDAR_DIR = "/home/you/cal"');
+// No [env] table yet: one is appended.
+t = C.setEnv("temperature = 0.6\n", "X", "1");
+assert.deepStrictEqual(C.env(t), [{ key: "X", value: "1" }]);
+assert.ok(/\n\[env\]\nX = "1"\n$/.test(t), JSON.stringify(t));
+// An env key in another table is not the env one.
+assert.deepStrictEqual(C.env('[voice]\nlang = "it"\n'), []);
+
+console.log("test_config: ok");