michielme

Show HN: FlowWatch – Decorator-first file watcher for Python workflows

Posted by michielme on Thursday January 22, 2026 @02:21AM
from the show-hn dept.

Built this because I was tired of writing the same watchdog boilerplate for file processing pipelines. FlowWatch is just decorators — @on_created, @on_modified, @on_deleted — plus a CLI and optional dashboard.Main thing I needed was process_existing=True so it handles files already in the folder on startup, useful for recovery.Using it for media workflows but it's generic. Feedback welcome.

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Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Wednesday January 14, 2026 @03:57AM (#46613847)

Good point. Right now it relies on FastAPI's dependency injection — you can wrap the router with your own auth middleware or add dependencies when including it. But I should add an example to the docs. Thanks for the nudge.

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Wednesday January 14, 2026 @01:19AM (#46612946)

Really appreciate you sharing this setup. The cron file generation for persistence is clever, and the whitelisting approach for user-defined jobs makes a lot of sense. Might borrow some of these ideas if I add a UI for job creation. Thanks!

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Tuesday January 13, 2026 @11:29PM (#46612342)

Interesting idea. Right now jobs are code-only which keeps it simple, but a UI for defining basic jobs could work. I'll think about it.

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Tuesday January 13, 2026 @11:13PM (#46612260)

Fair point. Cron works fine for standalone scripts. This is more for when you want scheduled tasks inside an existing Python app without spinning up separate infrastructure.

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Tuesday January 13, 2026 @02:50PM (#46606810)

APScheduler is solid and more mature. Main difference is the API — FastScheduler is decorator-first so you get @scheduler.daily.at("09:00") instead of configuring triggers, executors, and job stores separately. Also has a built-in FastAPI dashboard.

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Tuesday January 13, 2026 @01:39PM (#46605619)

Definitely open to PRs! Still early days so lots of room for improvement. Feel free to open an issue if you have ideas.

Re:Show HN: FastScheduler – Decorator-first Python task scheduler, asy... on Tuesday January 13, 2026 @01:38PM (#46605602)

Thanks! Yeah that's exactly the use case — when you just need something scheduled without setting up a whole stack.

Show HN: FastScheduler – Decorator-first Python task scheduler, async support

Posted by michielme on Tuesday January 13, 2026 @09:45AM
from the show-hn dept.

https://github.com/MichielMe/fastscheduler

Hi! I've built this because I kept reaching for Celery for simple scheduled tasks and it felt like overkill. I just needed "run this function every hour" or "daily at 9am", not distributed workers.So it's decorators for scheduling (@scheduler.every(5).minutes, @scheduler.daily.at("09:00")), state saves to JSON so jobs survive restarts, and there's an optional FastAPI dashboard if you want to...

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