Research
Collect keyword and competitive signals to identify worthwhile opportunities.
Independent product studio
I build practical AI systems that turn real workflows into repeatable products.
Tested skill work packs, tools, and case studies for people building with coding agents.
Explore ProductsBuilt by CHU KIT LUN
Independent product builder
CHU PRODUCT/001
Prioritize
Prioritize work by expected impact and feasibility.
Implement
Apply planned content improvements and technical changes.
QA
Review results and quality, then produce a shareable report.
Featured Store
Small products with a clear job, a visible scope, and a real way to start.
CHU PRODUCTFREE
Set the goal
Validate the unknown
Build the next step
Verify before reuse
Context · Direction · Verification · Reuse
AI Operator Workflow — FREE
HK$0Outcome: Turn one idea into a clear next step with a small, structured AI workflow.
1.0.0 · Codex / ChatGPT skill hostView product
CHU PRODUCTPLUS
Set the goal
Validate the unknown
Build the next step
Verify before reuse
Context · Direction · Verification · Reuse
AI Operator Workflow — PLUS
HK$59Outcome: Turn ideas into validated, launch-ready products with AI, even if you do not code.
CHU PRODUCTPRO
Set the goal
Validate the unknown
Build the next step
Verify before reuse
Context · Direction · Verification · Reuse
AI Operator Workflow — PRO
HK$159Outcome: Build your personal AI operating system with advanced Codex execution, handoffs, verification, and compounding workflows.
CHU PRODUCT/002
Install
Add the Skill as a reusable starting point.
Triggers
Define when it activates so instructions do not need repeating.
Customize
Adjust rules and boundaries to fit your workflow.
Verify
Review the result and keep final human control.
Codex Starter Skill
FreeOutcome: A small Codex skill for turning a repeated instruction into a reusable workflow with clear triggers, constraints, and validation.
1.0.0 · CodexView product
CHU PRODUCT/001
Research
Collect keyword and competitive signals to identify worthwhile opportunities.
Prioritize
Prioritize work by expected impact and feasibility.
Implement
Apply planned content improvements and technical changes.
QA
Review results and quality, then produce a shareable report.
SEO Autopilot — Codex Skill Work Pack
HK$199Outcome: A structured Codex work pack for repeatable SEO research, prioritization, implementation, quality review, and reporting.
Build → Use → Verify → Productize
CHU turns working practice into products only after the workflow has earned its shape.
- 01
Build
Start with a bounded real workflow.
- 02
Use
Put the system into ordinary work.
- 03
Verify
Check the result across languages and environments.
- 04
Productize
Package what is useful and name the limits.
Evidence, not theatre
A product is easier to trust when its scope and proof are visible.
- Three language editions
- Versioned release artifacts
- Browser-verified workflows
- Accessibility checked
Building Now
Experiments in progress, shown with their current state.
ModelPilot
TestingA public beta that turns one pasted Codex task into a recommended model and reasoning effort.
- Status
- Testing
- Problem
- Users often do not know which Codex model and reasoning effort fit a task.
- Current hypothesis
- A single-paste transparent recommendation is useful enough to validate before building an automatic router.
- Evidence collected
- A working trilingual browser prototype and deterministic rule tests. No usage, accuracy, or time-saving measurement exists yet.
- Next decision
- Measure whether real users follow the recommendation and come back to use the tool again.
- Last updated
- 2026-08-20
CHU · Independent Product Studio
Build with a clearer workflow.
Explore the products, inspect the work, and follow the decisions behind them.
Explore Products