From a303e161d369cac9b452e0f517ad8a116080ee99 Mon Sep 17 00:00:00 2001
From: Adrian Bonpin <adrianbonpin@gmail.com>
Date: Sun, 20 Sep 2026 17:01:30 +0800
Subject: [PATCH] Reduce to a pure on/off extension
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Durations were the only thing keeping a lot of machinery alive, so drop
them and let the dead code go with them.

Removed:
- The "Caffeinate for a Duration" command.
- lib/duration.ts entirely (parseDuration / formatDuration /
  formatRemaining / normalizeDuration / DURATION_PRESETS) plus its test
  file. Every export was reachable only from duration paths.
- The 30s setInterval re-render in the status view. It existed only to
  keep a "27m left" countdown honest, and with no timed sessions there is
  nothing to count down.
- The duration-preset actions in the status view.
- describeOptions(), which only the duration form used to explain itself.
- durationSeconds / expiresAt from the options, state and command
  builder, along with the `-t <seconds>` and `sleep <n>` branches. Both
  platforms now hold the assertion until signalled, which is what "on"
  means here.
- The unused "restarted" member of ToggleResult.

The status view now reports "since <time>" instead of a countdown, and
keeps a Refresh action.

Also fixes a type error the narrower helper surfaced: the status view's
run() helper was typed () => Promise<void> while startCaffeination
returns Promise<CaffeinateState> and stopCaffeination returns
Promise<boolean>.

407 deletions against 57 insertions.

Verified: vici lint, tsc --noEmit, eslint, 8/8 vitest, vici build, and
live in Vicinae — toggle on spawns `caffeinate -i`, toggle off stops it,
and a pre-existing user-owned `caffeinate -u -dmi` is left untouched
throughout.
---
 README.md                      | 36 +++++++-------
 package.json                   |  8 +--
 src/__tests__/duration.test.ts | 87 --------------------------------
 src/__tests__/platform.test.ts | 46 +++++------------
 src/caffeinate-for.tsx         | 70 --------------------------
 src/lib/caffeinate.ts          |  7 +--
 src/lib/duration.ts            | 77 ----------------------------
 src/lib/platform.ts            | 34 ++-----------
 src/lib/types.ts               |  8 +--
 src/status.tsx                 | 91 +++++++---------------------------
 10 files changed, 57 insertions(+), 407 deletions(-)
 delete mode 100644 src/__tests__/duration.test.ts
 delete mode 100644 src/caffeinate-for.tsx
 delete mode 100644 src/lib/duration.ts

diff --git a/README.md b/README.md
index 69c4af6..99b2d73 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Caffeinate
 
-> Keep your computer awake from [Vicinae](https://vicinae.com). Start, stop, and time-limit sleep prevention without touching a terminal.
+> Keep your computer awake from [Vicinae](https://vicinae.com). One toggle, no terminal.
 
 ![Caffeinate icon](./assets/caffeinate.png)
 
@@ -14,9 +14,8 @@ This is a native `@vicinae/api` extension, so none of that applies.
 
 | Command | Mode | What it does |
 | --- | --- | --- |
-| **Toggle Caffeination** | no-view | Starts or stops sleep prevention, whichever is appropriate. |
-| **Caffeination Status** | view | Live readout of whether sleep is being blocked, for how much longer, and the exact command holding it. Start/stop from the actions panel. |
-| **Caffeinate for a Duration** | view | Keeps the computer awake for a set time, then lets it sleep again automatically. |
+| **Toggle Caffeination** | no-view | Flips sleep prevention on or off, whichever is appropriate. The fast path. |
+| **Caffeination Status** | view | Whether sleep is being blocked, since when, and the exact command holding it. Start/stop from here. |
 
 ## How it works
 
@@ -24,16 +23,18 @@ Sleep prevention is an OS-level assertion, so the extension delegates to the pla
 
 | Platform | Mechanism |
 | --- | --- |
-| macOS | `/usr/bin/caffeinate -i [-d] [-s] [-t <seconds>]` |
-| Linux | `systemd-inhibit --what=idle:sleep --why=<reason> sleep <seconds\|infinity>` |
+| macOS | `/usr/bin/caffeinate -i [-d] [-s]` |
+| Linux | `systemd-inhibit --what=idle:sleep --why=<reason> sleep infinity` |
 
-The process is spawned **detached and unref'd**. That is required: Vicinae unloads a `no-view` command as soon as its function returns, so a child process would otherwise be torn down with it. Timed sessions need no babysitter — `caffeinate -t` and `sleep <seconds>` self-terminate when the window elapses.
+Both run until signalled — there is no timer, so nothing needs to be refreshed or babysat.
 
-State is recorded in `LocalStorage` as `{ pid, startedAt, expiresAt, command, args, processName, … }`.
+The process is spawned **detached and unref'd**. That is required: Vicinae unloads a `no-view` command as soon as its function returns, so a child process would otherwise be torn down with it.
+
+State is recorded in `LocalStorage` as `{ pid, startedAt, command, args, processName, … }`.
 
 Stopping signals the **recorded PID**, not `killall caffeinate`, so a `caffeinate` you started yourself in a terminal is left alone. Before signalling, the PID's process name is re-checked via `ps -o comm=` — PIDs get recycled, and without that check a stale entry could kill an unrelated process.
 
-Status is self-healing: if the recorded process is gone (timed out, or killed elsewhere), the stale state is cleared on the next read.
+Status is self-healing: if the recorded process is gone (killed elsewhere, or a reboot), the stale state is cleared on the next read.
 
 ## Preferences
 
@@ -42,12 +43,6 @@ Status is self-healing: if the recorded process is gone (timed out, or killed el
 | Also Prevent Display Sleep | off | macOS only. `systemd-inhibit` cannot hold the display awake — that is the compositor's job, and the UI says so rather than pretending. |
 | Also Prevent System Sleep | off | On macOS this assertion only takes effect while on AC power. |
 
-## Duration formats
-
-A bare number means **minutes**. Otherwise: `45m`, `2h`, `90s`, `1d`, `1h30m`, or friendly words like `1 hour` / `30 minutes`.
-
-The whole string must parse — `1h30` is rejected rather than silently read as `1h`.
-
 ## Development
 
 ```sh
@@ -63,11 +58,16 @@ To install a production build into Vicinae:
 npm run build      # writes to ~/.local/share/vicinae/extensions/caffeinate
 ```
 
+## No top bar indicator
+
+Vicinae has no menu-bar command support. This is not a Raycast-compat gap — a native `mode: "menu-bar"` command is accepted by the manifest and builds cleanly, then is **silently dropped** at registration, with no warning. `@vicinae/api` exports a `MenuBarExtra` component, but there is no host to render it into.
+
+For a real top bar indicator you need a standalone macOS menu-bar app; it cannot be part of a Vicinae extension.
+
 ## Not implemented
 
-- **Windows.** `detectPlatform` throws with a clear message instead of failing obscurely. `powercfg` support would be the path.
-- **While-an-app-is-running / scheduled windows.** `caffeinate -w <pid>` covers the former on macOS; neither is wired up.
-- **A persistent menu bar indicator** — Vicinae has no menu bar support. Use **Caffeination Status** instead.
+- **Windows.** `detectPlatform` throws with a clear message instead of failing obscurely. `powercfg` would be the path.
+- **Timed windows** (`caffeinate -t`), **while-an-app-is-running** (`caffeinate -w <pid>`), and **scheduled** windows. Deliberately omitted — on/off covers the common case.
 
 ## License
 
diff --git a/package.json b/package.json
index cc09fe1..08955a8 100644
--- a/package.json
+++ b/package.json
@@ -21,12 +21,6 @@
       "title": "Caffeination Status",
       "description": "See whether sleep is currently being prevented, and for how much longer. Start or stop it from here.",
       "mode": "view"
-    },
-    {
-      "name": "caffeinate-for",
-      "title": "Caffeinate for a Duration",
-      "description": "Keep your computer awake for a set amount of time, then let it sleep again automatically.",
-      "mode": "view"
     }
   ],
   "preferences": [
@@ -74,4 +68,4 @@
     "test": "vitest run",
     "test:watch": "vitest"
   }
-}
+}
\ No newline at end of file
diff --git a/src/__tests__/duration.test.ts b/src/__tests__/duration.test.ts
deleted file mode 100644
index a780315..0000000
--- a/src/__tests__/duration.test.ts
+++ /dev/null
@@ -1,87 +0,0 @@
-import { describe, expect, it } from "vitest";
-
-import { formatDuration, formatRemaining, normalizeDuration, parseDuration } from "../lib/duration";
-
-describe("parseDuration", () => {
-  it("treats a bare number as minutes", () => {
-    expect(parseDuration("30")).toBe(1800);
-    expect(parseDuration("1")).toBe(60);
-    expect(parseDuration("1.5")).toBe(90);
-  });
-
-  it("parses single units", () => {
-    expect(parseDuration("90s")).toBe(90);
-    expect(parseDuration("45m")).toBe(2700);
-    expect(parseDuration("2h")).toBe(7200);
-    expect(parseDuration("1d")).toBe(86400);
-  });
-
-  it("parses combined units", () => {
-    expect(parseDuration("1h30m")).toBe(5400);
-    expect(parseDuration("1d2h")).toBe(93600);
-    expect(parseDuration("1h30m10s")).toBe(5410);
-  });
-
-  it("accepts friendly words and spacing", () => {
-    expect(parseDuration("1 hour")).toBe(3600);
-    expect(parseDuration("30 minutes")).toBe(1800);
-    expect(parseDuration("2 hrs")).toBe(7200);
-    expect(parseDuration("  45 m  ")).toBe(2700);
-    expect(parseDuration("90 seconds")).toBe(90);
-  });
-
-  it("is case insensitive", () => {
-    expect(parseDuration("2H")).toBe(7200);
-    expect(parseDuration("30M")).toBe(1800);
-  });
-
-  it("rejects invalid or non-positive input", () => {
-    expect(parseDuration("")).toBeNull();
-    expect(parseDuration("   ")).toBeNull();
-    expect(parseDuration("abc")).toBeNull();
-    expect(parseDuration("0")).toBeNull();
-    expect(parseDuration("0m")).toBeNull();
-    expect(parseDuration("-5")).toBeNull();
-    expect(parseDuration("h")).toBeNull();
-    expect(parseDuration("m30")).toBeNull();
-  });
-
-  it("rejects partially consumed input rather than misreading it", () => {
-    expect(parseDuration("1h30")).toBeNull();
-    expect(parseDuration("30m garbage")).toBeNull();
-    expect(parseDuration("1h 30x")).toBeNull();
-  });
-});
-
-describe("normalizeDuration", () => {
-  it("expands words and strips whitespace", () => {
-    expect(normalizeDuration("1 Hour 30 Minutes")).toBe("1h30m");
-    expect(normalizeDuration(" 45 mins ")).toBe("45m");
-    expect(normalizeDuration("1 day")).toBe("1d");
-  });
-});
-
-describe("formatDuration", () => {
-  it("formats the largest two units", () => {
-    expect(formatDuration(45)).toBe("45s");
-    expect(formatDuration(90)).toBe("1m 30s");
-    expect(formatDuration(1800)).toBe("30m");
-    expect(formatDuration(3600)).toBe("1h");
-    expect(formatDuration(5400)).toBe("1h 30m");
-    expect(formatDuration(93600)).toBe("1d 2h");
-  });
-
-  it("handles zero and negatives", () => {
-    expect(formatDuration(0)).toBe("0s");
-    expect(formatDuration(-10)).toBe("0s");
-  });
-});
-
-describe("formatRemaining", () => {
-  it("rounds down to whole units and never goes negative", () => {
-    const now = 1_000_000;
-    expect(formatRemaining(now + 90_000, now)).toBe("1m 30s");
-    expect(formatRemaining(now + 3_600_000, now)).toBe("1h");
-    expect(formatRemaining(now - 5_000, now)).toBe("0s");
-  });
-});
diff --git a/src/__tests__/platform.test.ts b/src/__tests__/platform.test.ts
index 892c408..b262906 100644
--- a/src/__tests__/platform.test.ts
+++ b/src/__tests__/platform.test.ts
@@ -1,6 +1,11 @@
 import { describe, expect, it } from "vitest";
 
-import { MACOS_CAFFEINATE_PATH, UnsupportedPlatformError, buildCommand, describeOptions, detectPlatform } from "../lib/platform";
+import {
+  MACOS_CAFFEINATE_PATH,
+  UnsupportedPlatformError,
+  buildCommand,
+  detectPlatform,
+} from "../lib/platform";
 
 const base = { preventDisplaySleep: false, preventSystemSleep: false, reason: "test" };
 
@@ -26,6 +31,8 @@ describe("buildCommand on macOS", () => {
   });
 
   it("adds display and system assertions when requested", () => {
+    expect(buildCommand("darwin", { ...base, preventDisplaySleep: true }).args).toEqual(["-i", "-d"]);
+    expect(buildCommand("darwin", { ...base, preventSystemSleep: true }).args).toEqual(["-i", "-s"]);
     expect(buildCommand("darwin", { ...base, preventDisplaySleep: true, preventSystemSleep: true }).args).toEqual([
       "-i",
       "-d",
@@ -33,23 +40,14 @@ describe("buildCommand on macOS", () => {
     ]);
   });
 
-  it("adds a self-expiring timeout for durations", () => {
-    expect(buildCommand("darwin", { ...base, durationSeconds: 1800 }).args).toEqual(["-i", "-t", "1800"]);
-  });
-
-  it("floors fractional durations", () => {
-    expect(buildCommand("darwin", { ...base, durationSeconds: 90.7 }).args).toEqual(["-i", "-t", "90"]);
-  });
-
-  it("omits the timeout for indefinite or non-positive durations", () => {
-    expect(buildCommand("darwin", { ...base, durationSeconds: 0 }).args).toEqual(["-i"]);
-    expect(buildCommand("darwin", { ...base, durationSeconds: -60 }).args).toEqual(["-i"]);
+  it("never adds a timeout, so the assertion lasts until stopped", () => {
     expect(buildCommand("darwin", base).args).not.toContain("-t");
+    expect(buildCommand("darwin", { ...base, preventDisplaySleep: true }).args).not.toContain("-t");
   });
 });
 
 describe("buildCommand on Linux", () => {
-  it("uses systemd-inhibit with an infinite sleep by default", () => {
+  it("uses systemd-inhibit with an infinite sleep", () => {
     expect(buildCommand("linux", base)).toEqual({
       command: "systemd-inhibit",
       args: ["--what=idle:sleep", "--why=test", "sleep", "infinity"],
@@ -57,30 +55,12 @@ describe("buildCommand on Linux", () => {
     });
   });
 
-  it("hands the duration to sleep so it self-terminates", () => {
-    expect(buildCommand("linux", { ...base, durationSeconds: 600 }).args).toEqual([
-      "--what=idle:sleep",
-      "--why=test",
-      "sleep",
-      "600",
-    ]);
-  });
-
   it("does not claim to control the display, which systemd-inhibit cannot do", () => {
     const { args } = buildCommand("linux", { ...base, preventDisplaySleep: true });
     expect(args).toEqual(["--what=idle:sleep", "--why=test", "sleep", "infinity"]);
   });
-});
 
-describe("describeOptions", () => {
-  it("only mentions the display when it can actually be held", () => {
-    const macLines = describeOptions("darwin", { ...base, preventDisplaySleep: true });
-    const linuxLines = describeOptions("linux", { ...base, preventDisplaySleep: true });
-    expect(macLines.join(" ")).toMatch(/Display stays on/);
-    expect(linuxLines.join(" ")).toMatch(/cannot be held/);
-  });
-
-  it("always describes the baseline behaviour", () => {
-    expect(describeOptions("darwin", base)[0]).toMatch(/idle sleep blocked/);
+  it("passes the reason through so it shows up in systemd-inhibit --list", () => {
+    expect(buildCommand("linux", { ...base, reason: "Plex" }).args).toContain("--why=Plex");
   });
 });
diff --git a/src/caffeinate-for.tsx b/src/caffeinate-for.tsx
deleted file mode 100644
index 238ec4b..0000000
--- a/src/caffeinate-for.tsx
+++ /dev/null
@@ -1,70 +0,0 @@
-import { Action, ActionPanel, Form, Icon, Toast, popToRoot, showHUD, showToast } from "@vicinae/api";
-import { useState } from "react";
-
-import { optionsFromPreferences, startCaffeination } from "./lib/caffeinate";
-import { formatDuration, parseDuration } from "./lib/duration";
-import { describeOptions, detectPlatform } from "./lib/platform";
-
-export default function CaffeinateFor() {
-  const [duration, setDuration] = useState("30");
-
-  const parsed = parseDuration(duration);
-  const resolved = parsed === null ? "Enter a duration, e.g. 30, 45m, 2h or 1h30m" : `Staying awake for ${formatDuration(parsed)}`;
-
-  let behaviour: string[];
-  try {
-    behaviour = describeOptions(detectPlatform(), optionsFromPreferences(parsed ?? undefined));
-  } catch (error) {
-    behaviour = [error instanceof Error ? error.message : String(error)];
-  }
-
-  async function handleSubmit(values: Form.Values) {
-    const seconds = parseDuration(String(values.duration ?? ""));
-    if (seconds === null) {
-      await showToast({
-        style: Toast.Style.Failure,
-        title: "Not a valid duration",
-        message: "Try a number of minutes, or values like 45m, 2h or 1h30m.",
-      });
-      return;
-    }
-
-    try {
-      await startCaffeination(optionsFromPreferences(seconds, `Caffeinate for ${formatDuration(seconds)}`));
-      await showHUD(`☕ Staying awake for ${formatDuration(seconds)}`);
-      await popToRoot();
-    } catch (error) {
-      await showToast({
-        style: Toast.Style.Failure,
-        title: "Could not start caffeinating",
-        message: error instanceof Error ? error.message : String(error),
-      });
-    }
-  }
-
-  return (
-    <Form
-      navigationTitle="Caffeinate for a Duration"
-      actions={
-        <ActionPanel>
-          <Action.SubmitForm title="Start Caffeinating" icon={Icon.MugSteam} onSubmit={handleSubmit} />
-        </ActionPanel>
-      }
-    >
-      <Form.TextField
-        id="duration"
-        title="Duration"
-        placeholder="30"
-        defaultValue="30"
-        info="A bare number means minutes. Also accepts 45m, 2h, 1h30m, 90s."
-        onChange={setDuration}
-      />
-      <Form.Description title="Will run" text={resolved} />
-      <Form.Separator />
-      {behaviour.map((line) => (
-        <Form.Description key={line} text={line} />
-      ))}
-      <Form.Description text="Tip: open the extension preferences to also hold off display or system sleep." />
-    </Form>
-  );
-}
diff --git a/src/lib/caffeinate.ts b/src/lib/caffeinate.ts
index 2107007..fd0283f 100644
--- a/src/lib/caffeinate.ts
+++ b/src/lib/caffeinate.ts
@@ -18,12 +18,11 @@ export interface CaffeinatePreferences {
   preventSystemSleep?: boolean;
 }
 
-export function optionsFromPreferences(durationSeconds?: number, reason: string = DEFAULT_REASON): CaffeinateOptions {
+export function optionsFromPreferences(reason: string = DEFAULT_REASON): CaffeinateOptions {
   const prefs = getPreferenceValues<CaffeinatePreferences>();
   return {
     preventDisplaySleep: Boolean(prefs.preventDisplaySleep),
     preventSystemSleep: Boolean(prefs.preventSystemSleep),
-    durationSeconds,
     reason,
   };
 }
@@ -115,8 +114,6 @@ export async function startCaffeination(options: CaffeinateOptions): Promise<Caf
   const state: CaffeinateState = {
     pid: child.pid,
     startedAt: Date.now(),
-    expiresAt: options.durationSeconds && options.durationSeconds > 0 ? Date.now() + options.durationSeconds * 1000 : null,
-    durationSeconds: options.durationSeconds && options.durationSeconds > 0 ? Math.floor(options.durationSeconds) : null,
     command,
     args: spec.args,
     processName: spec.processName,
@@ -156,7 +153,7 @@ export async function getStatus(): Promise<CaffeinationStatus> {
   if (!state) return { active: false, state: null, stale: false };
 
   if (!(await isProcessRunning(state))) {
-    // The process timed out or was killed outside the extension. Self-heal.
+    // The process was killed outside the extension, or the machine rebooted. Self-heal.
     await clearState();
     return { active: false, state, stale: true };
   }
diff --git a/src/lib/duration.ts b/src/lib/duration.ts
deleted file mode 100644
index 8444c9e..0000000
--- a/src/lib/duration.ts
+++ /dev/null
@@ -1,77 +0,0 @@
-const UNIT_SECONDS: Record<string, number> = { s: 1, m: 60, h: 3600, d: 86400 };
-
-export const DURATION_PRESETS: { title: string; seconds: number }[] = [
-  { title: "15 minutes", seconds: 15 * 60 },
-  { title: "30 minutes", seconds: 30 * 60 },
-  { title: "45 minutes", seconds: 45 * 60 },
-  { title: "1 hour", seconds: 3600 },
-  { title: "2 hours", seconds: 2 * 3600 },
-  { title: "4 hours", seconds: 4 * 3600 },
-];
-
-/** Lowercase, expand friendly words, and drop all whitespace. */
-export function normalizeDuration(input: string): string {
-  return input
-    .trim()
-    .toLowerCase()
-    .replace(/\b(?:minutes?|mins?)\b/g, "m")
-    .replace(/\b(?:hours?|hrs?)\b/g, "h")
-    .replace(/\b(?:seconds?|secs?)\b/g, "s")
-    .replace(/\b(?:days?)\b/g, "d")
-    .replace(/\s+/g, "");
-}
-
-/**
- * Parse a human duration into seconds.
- *
- * Accepts a bare number (interpreted as minutes), or unit-suffixed values such
- * as `45m`, `2h`, `90s`, `1d`, and combinations like `1h30m`. The whole string
- * must be consumed, so `1h30` is rejected rather than silently misread.
- *
- * @returns seconds, or null when the input is not a valid positive duration.
- */
-export function parseDuration(input: string): number | null {
-  const text = normalizeDuration(input);
-  if (!text) return null;
-
-  if (/^\d+(?:\.\d+)?$/.test(text)) {
-    const minutes = Number(text);
-    return minutes > 0 ? Math.round(minutes * 60) : null;
-  }
-
-  const part = /(\d+(?:\.\d+)?)([dhms])/g;
-  let total = 0;
-  let consumed = "";
-  let match: RegExpExecArray | null;
-
-  while ((match = part.exec(text)) !== null) {
-    total += Number(match[1]) * UNIT_SECONDS[match[2]];
-    consumed += match[0];
-  }
-
-  if (!consumed || consumed !== text) return null;
-  return total > 0 ? Math.round(total) : null;
-}
-
-/** "1h 30m", "45m", "30s" — largest two units only. */
-export function formatDuration(seconds: number): string {
-  if (seconds <= 0) return "0s";
-  const days = Math.floor(seconds / 86400);
-  const hours = Math.floor((seconds % 86400) / 3600);
-  const minutes = Math.floor((seconds % 3600) / 60);
-  const secs = Math.floor(seconds % 60);
-
-  const parts: string[] = [];
-  if (days) parts.push(`${days}d`);
-  if (hours) parts.push(`${hours}h`);
-  if (minutes) parts.push(`${minutes}m`);
-  if (!days && !hours && secs) parts.push(`${secs}s`);
-  if (!parts.length) parts.push(`${secs}s`);
-
-  return parts.slice(0, 2).join(" ");
-}
-
-export function formatRemaining(expiresAt: number, now: number): string {
-  const remaining = Math.max(0, Math.round((expiresAt - now) / 1000));
-  return formatDuration(remaining);
-}
diff --git a/src/lib/platform.ts b/src/lib/platform.ts
index c64153c..67d5faf 100644
--- a/src/lib/platform.ts
+++ b/src/lib/platform.ts
@@ -19,46 +19,20 @@ export function detectPlatform(platform: string = process.platform): SupportedPl
 /**
  * Build the command that holds the sleep assertion.
  *
- * The returned process is expected to run for the whole caffeination window:
- * `caffeinate -t N` (macOS) and `sleep N` (Linux) both self-terminate once the
- * duration elapses, so nothing has to babysit them.
+ * Both variants run until they are signalled, which is what "on" means here:
+ * there is no duration, so nothing has to be timed or refreshed.
  */
 export function buildCommand(platform: SupportedPlatform, options: CaffeinateOptions): CaffeinateCommand {
-  const duration =
-    options.durationSeconds !== undefined && options.durationSeconds > 0
-      ? Math.floor(options.durationSeconds)
-      : null;
-
   if (platform === "darwin") {
-    // -i prevents idle sleep. Without -t the assertion is held until the process dies.
+    // -i prevents idle sleep; the assertion is held for as long as this process lives.
     const args = ["-i"];
     if (options.preventDisplaySleep) args.push("-d");
     if (options.preventSystemSleep) args.push("-s");
-    if (duration !== null) args.push("-t", String(duration));
     return { command: MACOS_CAFFEINATE_PATH, args, processName: "caffeinate" };
   }
 
   // systemd-inhibit has no equivalent for keeping the display on, so
   // preventDisplaySleep is intentionally not mapped here.
-  const args = ["--what=idle:sleep", `--why=${options.reason}`, "sleep", duration !== null ? String(duration) : "infinity"];
+  const args = ["--what=idle:sleep", `--why=${options.reason}`, "sleep", "infinity"];
   return { command: "systemd-inhibit", args, processName: "systemd-inhibit" };
 }
-
-export function describeOptions(platform: SupportedPlatform, options: CaffeinateOptions): string[] {
-  const lines: string[] = ["System stays awake (idle sleep blocked)."];
-  if (options.preventDisplaySleep) {
-    lines.push(
-      platform === "darwin"
-        ? "Display stays on."
-        : "Display sleep is controlled by your compositor and cannot be held by systemd-inhibit.",
-    );
-  }
-  if (options.preventSystemSleep) {
-    lines.push(
-      platform === "darwin"
-        ? "Full system sleep is blocked (macOS only honours this on AC power)."
-        : "Full system sleep is blocked.",
-    );
-  }
-  return lines;
-}
diff --git a/src/lib/types.ts b/src/lib/types.ts
index a991038..f4895f0 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -3,8 +3,6 @@ export type SupportedPlatform = "darwin" | "linux";
 export interface CaffeinateOptions {
   preventDisplaySleep: boolean;
   preventSystemSleep: boolean;
-  /** Omitted or <= 0 means "until stopped". */
-  durationSeconds?: number;
   reason: string;
 }
 
@@ -21,8 +19,6 @@ export interface CaffeinateCommand {
 export interface CaffeinateState {
   pid: number;
   startedAt: number;
-  expiresAt: number | null;
-  durationSeconds: number | null;
   command: string;
   args: string[];
   processName: string;
@@ -33,8 +29,8 @@ export interface CaffeinateState {
 export interface CaffeinationStatus {
   active: boolean;
   state: CaffeinateState | null;
-  /** State was recorded but the process is gone (timed out, or killed elsewhere). */
+  /** State was recorded but the process is gone (killed elsewhere, or a reboot). */
   stale: boolean;
 }
 
-export type ToggleResult = "started" | "stopped" | "restarted";
+export type ToggleResult = "started" | "stopped";
diff --git a/src/status.tsx b/src/status.tsx
index 71499cc..fc85ea8 100644
--- a/src/status.tsx
+++ b/src/status.tsx
@@ -2,22 +2,16 @@ import { Action, ActionPanel, Color, Icon, List, Toast, openExtensionPreferences
 import { useCallback, useEffect, useState } from "react";
 
 import { getStatus, optionsFromPreferences, startCaffeination, stopCaffeination } from "./lib/caffeinate";
-import { DURATION_PRESETS, formatDuration, formatRemaining } from "./lib/duration";
 import { CaffeinationStatus } from "./lib/types";
 
-/** Re-render cadence so the "time remaining" readout stays roughly honest. */
-const TICK_MS = 30_000;
-
 export default function CaffeinationStatusView() {
   const [status, setStatus] = useState<CaffeinationStatus | null>(null);
   const [isLoading, setIsLoading] = useState(true);
-  const [now, setNow] = useState(() => Date.now());
 
   const refresh = useCallback(async () => {
     setIsLoading(true);
     try {
       setStatus(await getStatus());
-      setNow(Date.now());
     } catch (error) {
       await showToast({
         style: Toast.Style.Failure,
@@ -33,17 +27,11 @@ export default function CaffeinationStatusView() {
     void refresh();
   }, [refresh]);
 
-  useEffect(() => {
-    if (!status?.active) return;
-    const timer = setInterval(() => setNow(Date.now()), TICK_MS);
-    return () => clearInterval(timer);
-  }, [status?.active]);
-
   const run = useCallback(
-    async (action: () => Promise<string>, successTitle: (message: string) => string) => {
+    async (action: () => Promise<unknown>, successTitle: string) => {
       try {
-        const message = await action();
-        await showToast({ style: Toast.Style.Success, title: successTitle(message) });
+        await action();
+        await showToast({ style: Toast.Style.Success, title: successTitle });
         await refresh();
       } catch (error) {
         await showToast({
@@ -56,74 +44,32 @@ export default function CaffeinationStatusView() {
     [refresh],
   );
 
-  const startFor = (seconds: number) =>
-    run(
-      async () => {
-        await startCaffeination(optionsFromPreferences(seconds, `Caffeinate for ${formatDuration(seconds)}`));
-        return formatDuration(seconds);
-      },
-      (label) => `Staying awake for ${label}`,
-    );
-
-  const startIndefinitely = () =>
-    run(
-      async () => {
-        await startCaffeination(optionsFromPreferences(undefined, "Caffeinate until stopped"));
-        return "";
-      },
-      () => "Staying awake until stopped",
-    );
-
-  const stop = () =>
-    run(
-      async () => {
-        await stopCaffeination();
-        return "";
-      },
-      () => "Sleep is allowed again",
-    );
+  const start = () => run(() => startCaffeination(optionsFromPreferences()), "Staying awake until stopped");
+  const stop = () => run(() => stopCaffeination(), "Sleep is allowed again");
 
   const state = status?.state ?? null;
   const active = status?.active ?? false;
 
-  const title = active ? "Keeping this computer awake" : "Sleep is not being prevented";
-
-  const subtitle = (() => {
-    if (!active || !state) return undefined;
-    if (state.expiresAt === null) return "Until stopped";
-    return `${formatRemaining(state.expiresAt, now)} left`;
-  })();
-
-  const accessories = active
-    ? [{ tag: { value: state?.expiresAt === null ? "indefinite" : "timed", color: state?.expiresAt === null ? Color.Green : Color.Orange } }]
-    : [];
-
   return (
     <List isLoading={isLoading} navigationTitle="Caffeination">
       <List.Section title={active ? "Active" : "Inactive"}>
         <List.Item
-          icon={active ? { source: Icon.MugSteam, tintColor: Color.Orange } : { source: Icon.Mug, tintColor: Color.SecondaryText }}
-          title={title}
-          subtitle={subtitle}
-          accessories={accessories}
+          icon={
+            active
+              ? { source: Icon.MugSteam, tintColor: Color.Green }
+              : { source: Icon.Mug, tintColor: Color.SecondaryText }
+          }
+          title={active ? "Keeping this computer awake" : "Sleep is not being prevented"}
+          subtitle={active && state ? `Since ${new Date(state.startedAt).toLocaleTimeString()}` : undefined}
+          accessories={active ? [{ tag: { value: "on", color: Color.Green } }] : []}
           detail={<List.Item.Detail markdown={buildDetail(active, state)} />}
           actions={
             <ActionPanel>
               {active ? (
                 <Action title="Stop Caffeinating" icon={Icon.StopFilled} onAction={stop} />
               ) : (
-                <Action title="Keep Awake Until Stopped" icon={Icon.MugSteam} onAction={startIndefinitely} />
+                <Action title="Keep Awake" icon={Icon.MugSteam} onAction={start} />
               )}
-              <ActionPanel.Section title="Keep awake for…">
-                {DURATION_PRESETS.map((preset) => (
-                  <Action
-                    key={preset.title}
-                    title={preset.title}
-                    icon={Icon.Clock}
-                    onAction={() => startFor(preset.seconds)}
-                  />
-                ))}
-              </ActionPanel.Section>
               <ActionPanel.Section>
                 <Action title="Refresh" icon={Icon.ArrowClockwise} onAction={refresh} />
                 <Action title="Open Extension Preferences" icon={Icon.Cog} onAction={openExtensionPreferences} />
@@ -138,22 +84,19 @@ export default function CaffeinationStatusView() {
 
 function buildDetail(active: boolean, state: CaffeinationStatus["state"]): string {
   if (!active || !state) {
-    return ["# Sleep is not being prevented", "", "Run **Toggle Caffeination**, or start a window from the actions panel."].join(
+    return ["# Sleep is not being prevented", "", "Use the action panel to start keeping this computer awake."].join(
       "\n",
     );
   }
 
-  const started = new Date(state.startedAt).toLocaleString();
-
   return [
     "# Keeping awake",
     "",
-    `Holding a sleep assertion via \`${state.processName}\`.`,
+    `Holding a sleep assertion via \`${state.processName}\`. It stays in place until stopped.`,
     "",
     "| | |",
     "|---|---|",
-    `| Started | ${started} |`,
-    `| Ends | ${state.expiresAt === null ? "When stopped" : new Date(state.expiresAt).toLocaleString()} |`,
+    `| Started | ${new Date(state.startedAt).toLocaleString()} |`,
     `| PID | ${state.pid} |`,
     `| Platform | ${state.platform} |`,
     "",