OPENAI BUILD WEEK COMMUNITY EVENT · SEOUL
WorkflowShow & Tell
Eight field notes from people putting AI into real work—planning, review, performance, data, operations, governance, and product delivery.
08talks
35participants
02languages
Eight workflows selected from Korea’s community.
Eight talks, released one by one.
Each article follows the problem, workflow, Codex role, validation method, and reusable operating contract. Unreleased stories remain visible as TBD.
01
Byeongjun Kim · Open-source builder
A Practical Codex Harness for Planning, Auditing, and Long-Running Work
A thin, inspectable harness that separates interviewing, planning, independent audit, implementation, and verification, while Hooks and state files preserve progress beyond a session.TBD · Publishing soon—
02
Jiyoung Lee · Software engineer · Nota AI
How a Team Can Trust AI-Generated Code
A Review Agent Runtime that combines repository policy, isolated execution, structured findings, and re-review context so teams can evaluate AI-generated changes against their own standards.TBD · Publishing soon—
03
Dongwook Song (Mong) · Lead Software Engineer · Channel Talk
Using Chrome Traces and Codex to Isolate Web Performance Bottlenecks
A performance workflow that gives Codex browser traces, source maps, HAR files, and one user journey—then validates the patch by measuring the same scenario again.TBD · Publishing soon—
04
Hyeonyeong Jeong · Data Engineer · MyRealTrip
Inside a Data Agent That Handles 500 Slack Questions a Day
More than a natural-language SQL bot: metric contracts and hard execution guards keep analytics safe, while failures and upstream changes return as regression cases and repair pull requests.TBD · Publishing soon—
05
Geonho Shin · B2B education business lead · Day 1 Company
Beyond Personal Productivity: Deploying Organizational Judgment Through Workflows
After search, strategy-agent, and linear-automation attempts failed to stick, proposal work became a deployable workflow of stages, intermediate outputs, validation criteria, and human stop-and-resume rules.TBD · Publishing soon—
06
Dongwon Lee · AX project lead
How PASS Turns 40,000 Emails into 31 Governed Workflows
A practitioner-led Codex platform that grew from semantic email search into governed workflows that retrieve evidence, propose actions, wait for approval, execute within narrow boundaries, and leave an audit trail.TBD · Publishing soon—
07
Young Kwon · Co-founder & CEO · Bizmatrixx
Designing Agent Mail Around Thread State, Evidence, and Approval
Agent Mail turns email threads containing client requests, campaign changes, and approvals into structured operating state, then returns decisions and outcomes to a knowledge layer for the next action.Read article
08
JooHyung Park · Product Designer
Shipping a Mobile App from a Phone with Codex Remote
A product designer turned scattered church-shuttle information into Rider and Driver apps, then used Codex Remote from a phone in Korea to keep development, validation, and launch moving on a Mac mini in Singapore.Read article
Inside the evening
The room, scattered across 192 frames.
The people
35 participants in the room
Organizers
- Seowoo HanHost · Codex Ambassador
- Jooyoung JungVolunteer operations
- Donghyun JungVolunteer operations
- Doohyun NamVolunteer operations
- Hyunsang ParkVolunteer operations
Presenters
- Byeongjun KimOpen-source builder
- Jiyoung LeeSoftware engineer · Nota AI
- Dongwook Song (Mong)Lead Software Engineer · Channel Talk
- Hyeonyeong JeongData Engineer · MyRealTrip
- Geonho ShinB2B education business lead · Day 1 Company
- Dongwon LeeAX project lead
- Young KwonCo-founder & CEO · Bizmatrixx
- JooHyung ParkProduct Designer