bad-time

A Claude Code mod that opens Bad Time Simulator in its own window while Claude works, so you can dodge bones instead of watching a spinner.

Opens Bad Time Simulator by Jcw87 in a browser window. Undertale © Toby Fox. Not affiliated with either. This repo contains no game files: the mod only opens that public page.

What it does

• Once Claude has been working for 2 seconds, a centered game window opens: about 60% of your screen height, in the game's 4:3 shape, and resizable.
• The fight stays open between prompts. When Claude finishes, you hear a short chime; keep playing or switch back.
• When Claude needs you (a permission prompt or a question), you hear the same chime and the window stays open. Switch to the terminal, answer, and switch back. The mod never answers or changes anything for Claude.
• Up to 4 Claude sessions can each have their own window.

Install

Needs Claude Code 2.1.287 or later and Chrome, Edge, Chromium or Brave.

/plugin marketplace add FatihBastan/bad-time
/plugin install bad-time@bad-time

To try it from a folder without installing:

claude --plugin-dir ./bad-time

Use

| Command | What it does | | --- | --- | | /badtime or /badtime on | Turns it on (remembered across sessions) | | /badtime off | Turns it off and closes the window | | /badtime now | Opens the game right away, even when Claude is idle | | /badtime close | Closes the window; it opens again the next time Claude works | | /badtime status | Shows whether it is on, the window, the browser and the URL |

Settings

Change these in /config or with /plugin configure bad-time@bad-time.

| Setting | Default | Notes | | --- | --- | --- | | onFinish | keep | keep leaves the fight open between prompts; close closes it after the countdown | | delaySeconds | 2 | 0 to 30; shorter turns never open the window | | countdownSeconds | 3 | 0 to 10; only used with close | | sounds | on | The short chime when Claude needs you or finishes | | strayKeyGuard | on | Holds a prompt sent within 1.5 s of the mod closing the window and puts it back in the box | | windowSize | auto | Or WIDTHxHEIGHT, such as 900x700, 320 to 3840 each | | browserPath | empty | Full path to a Chromium-based browser; empty means find one | | url | Bad Time Simulator | Must be https://; point it at a mirror if the page goes down |

Invalid values fall back to the default, with one toast naming the setting.

Safety

• Hands off Claude. Every hook passes Claude's events on untouched. The only thing the mod ever holds back is your own prompt, typed within 1.5 s of the mod closing the window (turn it off with strayKeyGuard). If the mod fails, Claude carries on as if it were not installed.
• Its own browser profile. The game runs in ~/.bad-time/profiles/slot-N, with no logins, cookies or extensions, separate from your normal browser.
• Closes only its own windows. A leftover window from a crashed session is found by that profile folder in its command line, never by a saved process id.
• Nothing from the repo runs. Every helper is called by its absolute path, without a shell, from your home folder.

What it reaches

From claude plugin validate:

| Network | Runs processes | Files | Calls a model | Submits prompts | | --- | --- | --- | --- | --- | | No (the browser loads the page) | The browser, ps/kill (powershell/taskkill on Windows), osascript for the screen size on macOS, a sound player on Linux and Windows | Only checks that paths exist | No | No |

Environment variables read: HOME, PATH, OS, USERPROFILE, SystemRoot, ProgramFiles, ProgramFiles(x86), LOCALAPPDATA.

Develop

claude plugin validate --strict .
claude plugin test .

License

MIT for this mod's code (see LICENSE). The chime in sounds/ is generated for this mod. Bad Time Simulator is Jcw87's; Undertale and its characters and music are Toby Fox's.