AlgoSu Tech Blog
Beyond Coder, Becoming a Builder — A Multi-Agent Harness Chronicle
- Tech Challenge
Memory Fades, Documents Pile Up — A Sliding Window for Agent Context
Across 152 sprints, the ADRs, MEMORY, and CLAUDE.md all swelled together. Yet handing the entire pile to an agent every session was like pouring more water into a full bucket. A record of trimming agent context with a single rule borrowed from the sliding window algorithm.
agentdocumentationsliding-windowcontext-optimizationclaude-code - Tech Challenge
Toward a Model-Agnostic Harness — Adopting a Critic
I brought in Codex — as an addition, not a replacement. After 17 rounds of review, I realized what I needed wasn't a different model. It was a system freed from dependency itself.
challengemulti-modelcodexcriticharness - Project Journey
AlgoSu CI Refactoring
Starting from a Channel.io blog post — auto-merge, composite actions, coverage gates, and pre-consultation across five sprints. A record of how one reference article turned into a real pipeline overhaul, and why two sprints that shipped zero lines of code were still wins.
ci-cdgithub-actionsai-devrefactoring - Tech Challenge
Baekjoon Is Gone?
On the day I saw Baekjoon's shutdown notice, migrating AlgoSu's problem source to Programmers taught me something I didn't expect — not a new technology, but an attitude about building services that lean on external platforms.
retrospectiveexternal-apiplatform-migration - Tech Challenge
Why Does My Session Keep Dropping? — Debugging 4 Layers of Desynchronization
JWT TTL is 2 hours, but users get logged out after 1 hour. Cookie maxAge, sliding refresh, frontend timer — 4 layers each had their own clock. Here's how we unified them into a single source of truth.
sessionjwtcookiedebuggingnestjschallenge - Project Journey
Looking Back on 67 Sprints
A project that started from curiosity about multi-agent systems became a full platform over 67 sprints. An honest retrospective of good decisions, deferred ones, and the journey from coder to builder.
retrospectivesolo-devgrowth - Project Journey
Safety Net for AI Code — Building 15 CI/CD Jobs in Practice
The faster AI wrote code, the tighter the verification had to be. A hands-on account of building 15 CI jobs — from secret scanning to GitOps locks.
ai-devci-cdgithub-actionsgitops - Project Journey
How to Control 12 AI Agents
As AI agents multiplied, control became the problem. An arbiter, a 3-echelon hierarchy, SSoT rules — a firsthand account of building a governance structure solo.
ai-devagentgovernance - Project Journey
MSA Design: Humans Decide, AI Executes
A hands-on record of MSA design where humans make architectural decisions and AI carries them out
ai-devarchitecturemsakubernetes - Project Journey
AI Agent Orchestration in Practice
A hands-on account of building an MSA solo while growing 12 AI agents into teammates
ai-devagentorchestrationclaude-code