Web App AI Agent Whisper from the past

WISP — turning the small whispers of moments gone by into services

Turning the small
whispers of moments gone by
into services.

WISP is an acronym of Whisper from the past. A discomfort that lingered, a memory that suddenly came back, an idea too good to let slip — hotkkangs, an AI engineer and developer, turns these small voices from moments gone by into services and runs them personally, after work and on weekends.

A whisper from the past

When the past speaks up,
I build it myself

Starlight in the night sky left its source long ago and is only now arriving. A note left at a place is a memory that opens only when you go back there. The voice from a past call should be one only you can hear again. Looking back, many of WISP's services deal with signals the past sends to the present — AstroShare, a community for astrophotography; PigNote, which lets you bury memories in places; and voice-lock, which protects past calls. This is where I listen to those small whispers and build them alone, end to end, from planning to deployment and operations.

10
Projects built
Solo
From planning to deployment
GCP
Self-deployed and operated
AI
Working as an AI engineer
WISP logo — a whisper from the past
WISP — Whisper from the past
What I've built so far

Projects

Ten projects I run myself, each one a whisper from the past turned into a service.

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01 OG A 1:1 battle poll where you pick one of two options. Offers points, preference stats, and the Vote Talk board. Voting · Community OG screenshot 02 Dokak A mobile web + app for exploring mechanical keyboard switch sounds and decorating keycaps in a 3D studio. Media · Community Dokak screenshot 03 Postit A social blog for sharing posts and photos with friends. Set visibility and categories as you like. Social · Blog Postit screenshot 04 AstroShare A community for taking and sharing astrophotos. Adds watermarks automatically and records shooting metadata. Community · Media AstroShare screenshot 05 Toss apps A multi-tenant platform that serves several Apps in Toss mini-apps from one backend. It hosts three games and PigNote. Toss · Mini-apps Toss mini-app screenshot 06 Today's Choice A choice-driven adventure that starts at a crosswalk and branches into 26 endings. Progress is saved to your Google account so you can pick up where you left off. Android · Game Today's Choice screenshot 07 PigNote A note (sticky note) you leave at a place opens only when you go back there. The more you record, the more your character Pig grows. Location-based · Social journaling PigNote screenshot 08 The Oddballs I Met (peek-a-moo) A one-round-a-day quiz: guess the quirky name of the oddball who appears every midnight from just its voice and silhouette. Android · Quiz game The Oddballs I Met screenshot 09 voice-lock Encrypts call recordings on the device with your own password and deletes the original only after verification passes. The server cannot open your recordings. Android · Security utility voice-lock screenshot 10 drover herdr on your phone, just like on a desktop. An SSH client that handles Korean (Hangul) input and Ctrl·Alt properly. Android · Developer tool drover screenshot

Curious how they were built?

Each project's page shows which technologies it uses and how it was built.

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