krivooxkrivoox/agent-stack-template/.cursor/rules/performance.mdc

agent-stack-template / rules

Cursor rule31 starsChanged 3 months agoMITView on GitHub

Navigation, caching and PWA contract

Where files are headingNew Cursor rule files have more rules about planning and tracking tasks, and fewer about code style.
Of the Cursor rule files we read, the 4,187 first seen in the last six months, against the older ones: the kind of rule that gained most share, and the kind that lost most. About files like this in general, not this one, and an estimate, since a kind is a pattern in the words.
In this repository20 other files it gives its agents.
- AGENTS.mdAGENTS.md
- .agents/skills/react-hook-form/AGENTS.mdAGENTS.md
- .agents/skills/vercel-react-best-practices/AGENTS.mdAGENTS.md
- CLAUDE.mdCLAUDE.md
- .cursor/rules/git-flow.mdcCursor rule
- .cursor/rules/prisma-schema.mdcCursor rule
- .cursor/rules/project.mdcCursor rule
- .cursor/rules/server-actions.mdcCursor rule
- .cursor/rules/tdd-domain.mdcCursor rule
- .cursor/rules/ui-design-system.mdcCursor rule
- better-auth-best-practicesSkill
- better-auth-security-best-practicesSkill
- changelog-automationSkill
- frontend-designSkill
- interface-designSkill
- marketing-psychologySkill
- organization-best-practicesSkill
- react-hook-formSkill
- shadcnSkill
- vercel-react-best-practicesSkill

The file

We split this performance.mdc into the rules it gives an agent

2 rules. About 0 are common, 0 are distinctive, and 2 are very specific to this project.

≈0
Common · estimate
Many files like this have a rule of this kind.
≈0
Distinctive · estimate
This author's own choices. Worth a look.
2
Very specific
Tied to their project's names, files or tools. Probably skip.

Common
Distinctive
Very specific

Very specific:
Every (app) segment ships a loading.tsx built on PageSkeleton.
line 15
Very specific:
After a mutation, use refreshAfterMutation / navigateAndRefresh from src/lib/navigation.ts.
line 19

≈ “Common” is an estimate: at least 1 in 5 of the 6,668 Cursor rule files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.

Files

performance.mdc

---
description: Navigation, caching and PWA contract
globs: src/app/**/*.tsx,src/app/**/*.ts,next.config.ts,src/components/app-shell/**/*.ts,src/components/app-shell/**/*.tsx
alwaysApply: false
---

# Performance and navigation

Detail: `docs/architecture.md` §7.

## Required

1. Soft navigation only. The shell in `(app)/layout.tsx` is persistent; a full
   page reload during an authenticated session is a bug.
2. Every `(app)` segment ships a `loading.tsx` built on `PageSkeleton`.
3. `experimental.staleTimes.dynamic: 0`. Perceived speed comes from skeletons
   and prefetch, not from showing data captured before the last mutation.
4. Nav destinations live in `nav-config.ts` so idle prefetch covers them.
5. After a mutation, use `refreshAfterMutation` / `navigateAndRefresh` from
   `src/lib/navigation.ts`. A plain `router.push` can land on a Client Router
   Cache entry captured before the write.
6. Authenticated routes are `private, no-store` — add the prefix to
   `PRIVATE_ROUTE_PREFIXES` in `next.config.ts`.

## Forbidden

- Cross-request caching of tenant data (balances, membership, anything
  per-user).
- A service worker that caches HTML or `/api/*`. Static assets under
  `/_next/static/*` only — they are content-hashed and immutable.
- Offline UI that displays stale authoritative data. Users trust what they see;
  a stale number is worse than no number.
- Relaxing `staleTimes.dynamic` to make a page feel faster.

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