Day1
CompleteOpen build
Cold Open
Build a tool that helps someone do the very first step of a task they have been avoiding.
30 min build
Season 3
Season 3 — Ridgeline
Fifteen challenges across three weeks, every one framed around a specific user who is not you. Two Founding Partners, a season partner, and the largest prize pool the league has run.
LiveBuild for someone else
Prize pool
$32,000
Challenges
15
Qualifying spots
12
Partners
8
Timeline
Key dates
Registration opens
Jun 27, 2026
Registration closes
Jul 13, 2026
Season starts
Jul 14, 2026
Season ends
Aug 4, 2026
Championship
Aug 4, 2026
Lineup
Challenges this season
One challenge per day, released at midday with the build window opening in the evening.
Week 1
Day2
CompleteTool challengeRequired tool
Pair Programmer's Apprentice
Use Lumen Forge to build a tool for developers who are new to a codebase.
30 min buildLumen
Day3
CompleteAgent
Quiet Hours
Build an agent that does useful work while its user is asleep.
30 min buildNorthwind Agents
Day4
CompleteVoice AIRequired tool
Say It Back
Build a voice interface for someone who cannot comfortably use a screen.
30 min buildResonate
Day5
CompleteTeamTeam
Cabin Build
First team challenge. Three builders, one repository, 30 minutes.
30 min build
Week 2
Day6
CompleteCoding
Receipts
Build something that makes a messy pile of documents answerable.
30 min buildBasalt
Day7
Voting openPrompt
One Prompt
Ship a useful product where the entire interface is a single prompt field.
30 min build
Day8
JudgingDesign
The First Ninety Seconds
Design the opening 90 seconds of a product a stranger has never seen.
30 min buildDriftwood
Day9
LiveOpen build
Calendar
Episode 3 — build something around scheduling, time, or calendars.
120 min buildCloses in --:--:--
Day10
ScheduledImage & videoRequired tool
Moving Picture
Generate video or image sequences that carry actual information, not vibes.
30 min buildStarts in --:--:--Prism
Week 3
Day11
ScheduledAutomation
Paper Trail
Automate a process that currently lives in someone's inbox.
30 min buildStarts in --:--:--
Day12
ScheduledBusiness
Small Business, Big Problem
Build for a business with fewer than ten employees and no technical staff.
30 min buildStarts in --:--:--
Day13
ScheduledSocial impact
Common Good
Build something for a community organization that could not afford to commission it.
30 min buildStarts in --:--:--
Day14
ScheduledOpen build
Last Light
Final qualifying challenge. Open build, double points.
30 min buildStarts in --:--:--
Day15
ScheduledChampionship
Ridgeline Championship
Twelve finalists. Sixty minutes. One live stage.
60 min buildStarts in --:--:--Driftwood
Sponsors
Partners this season
Rules
Season 3 rules
- 0130 minutes on the clock, enforced by the platform. The submission form locks at the deadline.
- 02Everything you ship must be built during the build window. Scaffolding a project ahead of time is disqualifying.
- 03Disclose pre-existing code, templates, collaborators, and any work done before the start.
- 04Required-tool challenges must use the designated partner product in a load-bearing way.
- 05One submission per builder or team per challenge.
- 06Judges declare conflicts of interest and are reassigned automatically.
- 07Community votes are weighted and rate-limited. Vote manipulation forfeits the season.