Kiroween 2026

$100K in prizesCloses Dec 4

  • Needs your click to submit
  • Sign-in: Devpost
  • Needs a demo video
  • Bar: a repo with recent commits

Kiro's annual online Halloween-themed hackathon on Devpost. Build a new working software application with Kiro (IDE, CLI, Web or Kiro Crew) in one of four categories: Resurrection, Frankenstein, Skeleton Crew or Costume Contest. $100,000 in cash prizes.

Who can apply

  • new work started after 2026-10-30
  • a demo video
  • built with Kiro, with the /.kiro directory at the root of the public GitHub repo

What the form asks

  • Category: a category
  • URL to your public GitHub: a public GitHub repo with /.kiro
  • URL to your working app(s): a link to the working app
  • Text description that explains the features and functionality of your project: a features and functionality description
  • Demo video of your project: a public YouTube demo under 3 minutes
  • Provide a write-up on how Kiro was used: a write-up on how you used Kiro
  • Bonus Prize details: optional

Rules

  • Submit on Devpost by Friday, December 4, 2026 at 2:00 PM Pacific Time.
  • Only new projects are eligible: build during the Submission Period (October 30 to December 4, 2026). Projects started before October 30, including Kiroween 2025 projects, are not eligible.
  • You may use standard frameworks, libraries and starter templates, but must disclose any other pre-existing code or work.
  • Build a working software application that uses Kiro (IDE, CLI, Web and/or Kiro Crew) in one category: Resurrection, Frankenstein, Skeleton Crew or Costume Contest.
  • The public GitHub repo (not GitLab or Bitbucket) must hold all source code, carry a visible open source license, and include the /.kiro directory at the root. Do not gitignore /.kiro.
  • Teams can have up to three members. Entrants must be above the legal age of majority; some countries are excluded (see the official rules).
  • An eligible project can win one Overall Prize or one Category Prize, not both, plus any number of Bonus Prizes.
  • Request 4,000 free Kiro credits on the Resources tab by December 1 at 12:00 PM PT.
  • Winners are announced on or around February 3, 2027.

What they want now

Kiroween 2026 wants Bring dead technology back to life, Stitch incompatible technologies into one app, Skeleton code templates with two applications