Add triggershell service logs command

Thin wrapper around journalctl, consistent with the existing status/uninstall wrappers around systemctl.

README.md

@@ -113,6 +113,7 @@ the script — always as a discrete argv element or env var, never interpolated
 | `triggershell service install [--system]`                                                     | Install a systemd unit that runs `triggershell start` (per-user by default, Linux only)                                                                                                                                |
 | `triggershell service uninstall [--system]`                                                   | Stop, disable, and remove the systemd unit                                                                                                                                                                             |
 | `triggershell service status [--system]`                                                      | Show the systemd unit's status                                                                                                                                                                                         |
+| `triggershell service logs [-n LINES] [--no-follow] [--system]`                               | Tail the systemd unit's logs (wraps `journalctl`)                                                                                                                                                                      |
 
 ### Running scripts from the CLI
 

docs/ARCHITECTURE.md

@@ -74,9 +74,9 @@ installs a per-user unit (`~/.config/systemd/user/triggershell.service`, no root
 targets `/etc/systemd/system/` instead and prints the `sudo` commands to run if not already root.
 `install` reloads the systemd daemon but does not enable/start the unit itself — that's a separate,
 explicit `systemctl --user enable --now triggershell`, since it's the point where the service
-actually starts listening and running scripts. `triggershell service status`/`uninstall` are thin
-wrappers around `systemctl`; log tailing is just `journalctl --user -u triggershell -f` — not
-reimplemented.
+actually starts listening and running scripts. `triggershell service status`/`uninstall`/`logs` are
+thin wrappers around `systemctl`/`journalctl` respectively - no unit-file parsing or log storage of
+our own, journald already does that.
 
 ## Cross-module-graph state
 

src/cli/commands/service.ts

@@ -126,3 +126,24 @@ export async function serviceStatusCommand(
   });
   process.exitCode = result.exitCode ?? 1;
 }
+
+export interface ServiceLogsOptions extends ServiceScopeOptions {
+  follow?: boolean;
+  lines?: number;
+}
+
+export async function serviceLogsCommand(
+  opts: ServiceLogsOptions,
+): Promise<void> {
+  const scope = scopeOf(opts);
+  const args = scope === "user" ? ["--user"] : [];
+  args.push("-u", SERVICE_NAME);
+  if (opts.follow !== false) args.push("-f");
+  if (opts.lines !== undefined) args.push("-n", String(opts.lines));
+
+  const result = await execa("journalctl", args, {
+    stdio: "inherit",
+    reject: false,
+  });
+  process.exitCode = result.exitCode ?? 1;
+}

src/cli/index.ts

@@ -5,6 +5,7 @@ import { runCommand } from "./commands/run";
 import { scriptsListCommand, scriptsShowCommand } from "./commands/scripts";
 import {
   serviceInstallCommand,
+  serviceLogsCommand,
   serviceStatusCommand,
   serviceUninstallCommand,
 } from "./commands/service";
@@ -180,6 +181,25 @@ service
   )
   .action(serviceStatusCommand);
 
+service
+  .command("logs")
+  .description("Tail the systemd unit's logs (journalctl).")
+  .option(
+    "-n, --lines <n>",
+    "Number of recent log lines to show.",
+    (v) => Number(v),
+  )
+  .option(
+    "--no-follow",
+    "Print recent logs and exit instead of tailing continuously.",
+  )
+  .option(
+    "--system",
+    "Target the system-wide unit instead of the per-user one.",
+    false,
+  )
+  .action(serviceLogsCommand);
+
 if (process.argv.length <= 2) {
   program.outputHelp();
   process.exit(1);