The Value of Rules: Each Solves a Real Problem
Overview recap + usage guide + four actions to adapt rules to your own project
THE QUESTION THIS PAGE ANSWERS
ANSWER FIRSTWhat is the key idea behind “The Value of Rules: Each Solves a Real Problem”?
Overview recap + usage guide + four actions to adapt rules to your own project
Turn taste into a behavior the product can repeat. The useful outcome is not a nice opinion. It is a visible rule, a small example, and a way to tell when the experience falls below the bar.
Capture one before-and-after example that shows the quality bar without extra explanation.
Polish that improves the surface while leaving the user's uncertainty untouched.
All 14 chapters are grouped into five pillars. Click any pillar to expand the chapter details, a one-line summary for each, and which lesson in this course covered it.
STEP 1Place in the rules directory
Put the .mdc file into your project's .cursor/rules/ directory; Cursor will auto-detect it.
STEP 2Configure activation mode
Set alwaysApply: true in frontmatter for global activation; set false to require manual @ reference — better for writing style rules.
STEP 3Replace environment facts
Swap in your own model config, tech stack, and port rules; use placeholder values for secrets files and exclude them from git.
This ruleset is not a plug-and-play template. Answer the 4 questions below, corresponding to the four actions — Delete, Swap, Tune, Add — and finish to generate your own customized recommendation list.
The course has 11 lessons in total. Click a card to flip it open and see the one-sentence summary for each lesson.
60 minutes · Deliverable: your own rules repository. Starting from xs_vibe_rules, apply the four actions — Delete, Swap, Tune, Add — to produce your first version of the rule files. Use it in a real project for a full week; record which rules got triggered and which never fired. Delete the ones that never fired, write new rules for new pitfalls you encountered, then open-source your version.
itshen/xs_vibe_rules · Open-source repo for this course
Your final assignment starts here. Fork it (MIT License), apply the four actions — Delete, Swap, Tune, Add — to adapt it as your own, use it for a week, then open-source your version.
AI handles speed; rules handle stability. The value of rules is not in quantity — every rule must solve a real problem. Curating 5 well-chosen chapters beats copying all 14. Rules, like code, rot when no one maintains them.
Source: Complete materials for this course series are in the open-source repo itshen/xs_vibe_rules (MIT License), including the full rule-opensource.mdc and per-chapter design notes.
Turn the feeling in “Interactive 1 · Panoramic Map of All 14 Rule Chapters” into a judgment
“All 14 chapters are grouped into five pillars.” points out that AI has lowered the bar for making something usable. The skill readers need is noticing what is wrong and turning that feeling into an actionable requirement.
Watch the user's next action, not just the surface
Turn “Put the .mdc file into your project's .cursor/rules/ directory;” into observable questions: does the user know what happened, what to do next, and how to recover from an empty or failed state? Does the hierarchy make the important information visible first?
Pretty is not the same as usable
Apply “AI handles speed;” to a second screen or flow. Record one moment of hesitation and the user action after the change; observable behavior is stronger evidence than polish alone.
From “Interactive 1 · Panoramic Map of All 14 Rule Chapters” to “STEP 1 Place in the rules directory”
“Interactive 1 · Panoramic Map of All 14 Rule Chapters” grounds the problem in “All 14 chapters are grouped into five pillars. Click any pillar to expand the chapter details, a one-line summary for each, and which lesson in this course covered it”. “STEP 1 Place in the rules directory” then moves it toward “Put the .mdc file into your project's .cursor/rules/ directory; Cursor will auto-detect it”. Together, they show that the lesson is not just a conclusion to remember, but a claim with conditions.
Carry the judgment into the next situation
For experience work, turn abstract impressions into user actions: did the person understand the state, find the next step, recover from an error, and want to continue?
- “Interactive 1 · Panoramic Map of All 14 Rule Chapters”: All 14 chapters are grouped into five pillars. Click any pillar to expand the chapter details, a one-line summary for each, and which lesson in this course covered it
- “STEP 1 Place in the rules directory”: Put the .mdc file into your project's .cursor/rules/ directory; Cursor will auto-detect it
- “The closing point”: Your final assignment starts here. Fork it (MIT License), apply the four actions — Delete, Swap, Tune, Add — to adapt it as your own, use it for a week, then open-source your version
The final “The closing point” brings the discussion to “Your final assignment starts here. Fork it (MIT License), apply the four actions — Delete, Swap, Tune, Add — to adapt it as your own, use it for a week, then open-source your version”. The useful thing to carry forward is knowing which judgments must be revisited when input, scale, or risk changes.
I turned one judgment from this article into a small experiment I could run today. Knowing what to observe next is more useful than simply remembering the conclusion.
After reading this, I first looked for the conditions behind the idea instead of copying the method into a project. That order made the later trade-offs much clearer.
When this judgment reaches real work, which constraint should be added first? I am curious which step matters most between reading and the first practical attempt.
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