agentleFS
Sign inStart free
rpraharajrpraharaj/ai-sdlc/skills/performance/SKILL.md

performance

Skill0 starsChanged 16 days agoMITView on GitHub

Investigate slowness with measure-first profiling, or guard a diff for regressions (N+1, unbounded work, heavy imports). Use when something is slow, the user asks to profile, or ready-to-merge asks for a performance guard.

78 other projects use a version of this.

Adopted by

Most recently taken up by

Used with

Projects with it also use app-brief, design-from-app and 10 more.

Other files people use alongside this one.

Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
  • StijnusSkill

    app-brief

    One-page brief (docs/BRIEF.md) for a new macOS app, written before any code. Use when the user has an app idea, wants to replace an app they pay for, or the research and clone skills are done.

    Also in 3 projects that use this

  • StijnusSkill

    design-from-app

    Rebuild the look of an app the user likes as a native SwiftUI design kit, by measuring its screenshots (sizes, spacing, type, colors, icons), building its parts, and comparing pixel by pixel until they match. Use when the user names an app whose look they want, shares screenshots of one, or says "make it look like X".

    Also in 3 projects that use this

  • FlorianBruniauxSkill

    tdd-rust

    Also in 3 projects that use this

  • RodrigoTomeESSkill

    web-quality-audit

    Comprehensive web quality audit covering performance, accessibility, SEO, and best practices. Use when asked to "audit my site", "review web quality", "run lighthouse audit", "check page quality", or "optimize my website".

    Also in 9 projects that use this

  • launchapp-devSkill

    layout-grid

    Define responsive layout grid systems with columns, gutters, margins, and breakpoint behavior.

    Also in 3 projects that use this

  • MohamedAbdallah-14Skill

    app-icon

    Generate an app icon from a single 1024² master and fan out to iOS (AppIcon.appiconset with squircle-ready 1024 opaque), Android (adaptive foreground + background + Android 13 monochrome), PWA (192/512 + 512 maskable with 80% safe zone), and visionOS (3-layer parallax).

    Also in 3 projects that use this

  • +1 more from Stijnus

The file

We split this skill into the rules it gives an agent

1 rule. 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • 0

    Common

    Most of the 52 edited versions we read keep these.

  • 1

    Distinctive

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Do not rewrite on a hunch.

    line 19

“Common” is measured: kept by at least 6 in 10 of the 52 edited versions of this file we could read. “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
SKILL.md

Performance

Two modes. Pick one and say which: Investigate (user says it is slow) or Guard (ready-to-merge or “will this make it slower”).

Do not rewrite on a hunch. Guess-caching is a fail.

Is this the right skill?

SignalDo this instead
NFR numberswrite-nfr
Production timeouts/retriesproduction-pass

Required inputs

  • Guard: the current diff
  • Investigate: a named surface (or the hottest path in the complaint)
  • AGENTS.md

Human decisions (do not invent)

  • A budget number that is not in the repo or from the user

Procedure

Guard: fail if the diff adds N+1, unbounded lists, full-collection scan, heavy import on a hot route, sync work this repo usually defers, or UI layout jump without reserved size — unless a matching bound already exists. If none apply, pass. No micro-optimizations.

Investigate: name the surface; measure first with what this repo already has; classify one bottleneck; change one thing; measure again. If you cannot measure, unverified. See references/performance-template.md.

Output

  • Path: reply
  • Template: references/performance-template.md

Quality bar

  • Mode is named
  • Guard has checked/fails lines
  • Investigate has a number or unverified
  • No invented cache

Done

The template. Do not commit unless asked.

Download now (ZIP)

Does it work?

Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.

No reviews yet

People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.

  • It worked
  • Partly
  • It didn't
What did you use it for? e.g. Reviewing pull requests in a Rails app

Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.

Your trail

Files you open will collect here, so you can find them again.

Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.

Now do this for your own.

Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.

Check your setup, free