SQL Optimization
github/awesome-copilot
Universal SQL performance optimization assistant for comprehensive query tuning, indexing strategies, and database performance analysis across all SQL databases (MySQL, PostgreSQL, SQL Server…
A skill your agent uses when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading.
MITAuto-check passed
Install Optimized
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist optimized --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/optimized .claude/skills/optimized && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .claude/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimizedType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist optimized --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/optimized .agents/skills/optimized && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .agents/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist optimized --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/optimized .cursor/skills/optimized && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .cursor/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/optimized--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist optimized --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/optimized .gemini/skills/optimized && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .gemini/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist optimizedInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/optimized .github/skills/optimized && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .github/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill optimized -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist optimized --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/optimized .opencode/skills/optimized && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "optimized" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/optimized into .opencode/skills/optimized/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimized", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
optimized- GitHub stars
- 74k
- Token cost
- ~828 tokens
- SKILL.md length
- 408 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading.
- Reviewing image assets
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Build transforms related to Optimise images for faster loading
What it does
Optimized is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.
Its SKILL.md is about 830 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing image assets
- Build transforms related to Optimise images for faster loading
Example prompts
- “/optimized”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Optimized loads about 828 tokens when it runs, and up to ~2.1k if it reads all its reference files. Until then it costs about 54 tokens; SKILL.md has 408 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 408 words, ~828 tokens.
Download SKILL.mdSave it as
.claude/skills/optimized/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- optimized
- description
- Use when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.
- metadata.category
- images
- metadata.priority
- high
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 20
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/images/optimized
Optimise images for faster loading
Unoptimised images are the most prevalent cause of page bloat. A DSLR-quality JPEG with EXIF data can be 8MB; the same image optimised for web delivery is under 200KB with no visible quality difference. Lighthouse's 'Efficiently encode images' audit reports potential savings that, when fixed, directly improve LCP and reduce bandwidth costs.
Quick Reference
- Strip EXIF metadata from all JPEG/WebP images before deployment—it adds unnecessary bytes
- JPEG: quality 80 with
progressive: true(mozjpeg); PNG: run pngquant at quality 65-80 - SVG: run through SVGO to remove editor artefacts and reduce file size
- Lighthouse flags images reducible by 4KB+ as 'Efficiently encode images' opportunities
Check
Audit all image assets in this project for optimisation issues: 1) Run Lighthouse and check the 'Efficiently encode images' audit—it flags images that could be reduced by 4KB or more. 2) Check if JPEG images use progressive encoding (better perceived performance). 3) Check if images retain EXIF/IPTC metadata (adds unnecessary bytes). 4) Check if PNG images could be quantised (pngquant) for smaller files. 5) Check if SVG files contain unnecessary editor metadata, comments, or redundant attributes. Report each image with its current size and estimated savings.
Fix
For each unoptimised image: 1) JPEG: re-encode with mozjpeg at quality 80 with progressive=true. 2) PNG: run pngquant at quality 65-80 for lossy compression, or oxipng for lossless. 3) WebP: encode at quality 80. 4) AVIF: encode at quality 60 with effort 6. 5) SVG: run through SVGO to remove editor metadata, comments, and redundant attributes. 6) Strip EXIF metadata from all JPEG/WebP images. For each image, show the before/after file size and percentage reduction.
Show full SKILL.md (138 more words)Show less
Explain
Explain what image optimisation means technically. JPEG compression works by converting pixel data to frequency components (DCT) and quantising the high-frequency data—quality settings control how aggressively this quantisation occurs. PNG uses lossless DEFLATE compression, but colour quantisation (pngquant) can massively reduce file size with minimal visible change. EXIF metadata (GPS, camera model, timestamps) adds kilobytes to images with no benefit for web users. Progressive JPEG encoding allows the browser to show a low-resolution version immediately while the full image loads, improving perceived performance.
Code Review
Review image assets, markup, and delivery configuration related to Optimise images for faster loading. Flag exact files or components where format choice, sizing, or loading behavior violates the rule, and describe how to confirm the fix in DevTools.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/images/optimized
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/optimized of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Optimized next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Optimized this skillthedaviddias/Front-End-Checklist | 74k | — | ~828 | Automated safety check: Pass | MIT | |
| SQL Optimizationgithub/awesome-copilot | 40k | 2 repos | ~2.3k | Automated safety check: Pass | MIT | |
| Agent Performance Optimizerruvnet/ruflo | 74k | 2 repos | ~3.6k | Automated safety check: Pass | MIT | |
| Database Optimizerdavila7/claude-code-templates | 32k | 7 repos | ~2.5k | Automated safety check: Pass | MIT | |
| Prompt Optimizeraffaan-m/ECC | 274k | 2 repos | ~2.4k | Automated safety check: Pass | MIT | |
| Cost Optimizeruvnet/ruflo | 74k | — | ~997 | Automated safety check: Notes | MIT |
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- Official
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Questions about Optimized
What does Optimized do?
A skill your agent uses when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading. Optimized is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing image assets, markup, and CDN or build transforms related to Optimise images for faster loading.
When should I use Optimized?
Optimized fits situations like: reviewing image assets; build transforms related to Optimise images for faster loading.
How do I install Optimized in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill optimized -a claude-code`. Or copy the skill folder (skills/optimized in thedaviddias/Front-End-Checklist) into .claude/skills/optimized in your project. Claude Code loads it when a task matches its description.
How do I install Optimized in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill optimized -a codex`. Or copy the skill folder (skills/optimized in thedaviddias/Front-End-Checklist) into .agents/skills/optimized in your project. Codex loads it when a task matches its description.
Can I use Optimized in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill optimized -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/optimized, .gemini/skills/optimized, .github/skills/optimized and .opencode/skills/optimized in your project.
What does Optimized need to run?
SKILL.md names no scripts, command-line tools or credentials: Optimized is instructions for the agent only.
Does Optimized access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Optimized safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Optimized use?
Optimized is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Optimized use?
About 828 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.3k tokens, read only when the agent opens those files.
What are the alternatives to Optimized?
Skills that share tags, products or a category with Optimized: SQL Optimization (github/awesome-copilot, 40k stars), Agent Performance Optimizer (ruvnet/ruflo, 74k stars), Database Optimizer (davila7/claude-code-templates, 32k stars) and Prompt Optimizer (affaan-m/ECC, 274k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Optimized?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,388 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.