Music List
ruvnet/ruflo
List the account's saved music productions with metadata and audiourl
A skill your agent uses when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address.
MITAuto-check passed
Install Tel Mailto
$ npx skills add thedaviddias/Front-End-Checklist --skill tel-mailto -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist tel-mailto --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/tel-mailto .claude/skills/tel-mailto && 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 "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .claude/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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/tel-mailtoType 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 tel-mailto -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist tel-mailto --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/tel-mailto .agents/skills/tel-mailto && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .agents/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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 tel-mailto -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist tel-mailto --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/tel-mailto .cursor/skills/tel-mailto && 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 "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .cursor/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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/tel-mailto--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 tel-mailto -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist tel-mailto --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/tel-mailto .gemini/skills/tel-mailto && 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 "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .gemini/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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 tel-mailtoInstalls 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 tel-mailto -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/tel-mailto .github/skills/tel-mailto && 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 "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .github/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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 tel-mailto -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 tel-mailto --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/tel-mailto .opencode/skills/tel-mailto && 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 "tel-mailto" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/tel-mailto into .opencode/skills/tel-mailto/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tel-mailto", 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
tel-mailto- GitHub stars
- 74k
- Token cost
- ~549 tokens
- SKILL.md length
- 230 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address.
- Applies to contact pages
- 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
- Business listing pages
What it does
Tel Mailto is an agent skill from thedaviddias/Front-End-Checklist. Use when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address. Use when auditing contact UX or schema-marked LocalBusiness pages.
Its SKILL.md is about 550 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
- Applies to contact pages
- Business listing pages
- Headers/footers
- Any page displaying a phone number
Example prompts
- “/tel-mailto”
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
Tel Mailto loads about 549 tokens when it runs, and up to ~1.6k if it reads all its reference files. Until then it costs about 53 tokens; SKILL.md has 230 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). 230 words, ~549 tokens.
Download SKILL.mdSave it as
.claude/skills/tel-mailto/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- tel-mailto
- description
- Use when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address. Use when auditing contact UX or schema-marked LocalBusiness pages.
- metadata.category
- seo
- metadata.priority
- medium
- metadata.difficulty
- beginner
- metadata.estimatedTime
- 10
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/seo/tel-mailto
Tel & Mailto Links
On mobile devices, tel: and mailto: links trigger the native phone dialer and email client with one tap; plain-text contact info forces copy-paste and measurably reduces contact conversion rates.
Quick Reference
- Wrap phone numbers in
<a href="tel:+15551234567">for click-to-call on mobile devices - Wrap email addresses in
<a href="mailto:contact@example.com">for one-click email compose - Use E.164 format for
tel:links:+followed by country code and number, no spaces or dashes - Plain text phone numbers and emails require users to copy-paste — a UX and conversion friction point
Check
Scan the HTML for phone numbers (patterns like \+?[0-9\s\-().]{7,}) and email addresses ([\w.-]+@[\w.-]+\.[a-z]{2,}). Verify that phone numbers are wrapped in <a href="tel:..."> and emails in <a href="mailto:...">. Flag any that appear as plain text.
Fix
Wrap each phone number in an anchor tag: <a href="tel:+15551234567">+1 (555) 123-4567</a>. Wrap each email in: <a href="mailto:contact@example.com">contact@example.com</a>. Format tel: values using E.164 (+[country][number]) without spaces.
Explain
Explain how tel: and mailto: URI schemes work in HTML, why E.164 format is required for international compatibility, and how these links improve mobile UX and contact conversion rates.
Code Review
Review metadata generation, rendered HTML, structured data, and response headers related to Tel & Mailto Links. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/seo/tel-mailto
© 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/tel-mailto of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Tel Mailto 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 |
|---|---|---|---|---|---|---|
| Tel Mailto this skillthedaviddias/Front-End-Checklist | 74k | — | ~549 | Automated safety check: Pass | MIT | |
| Music Listruvnet/ruflo | 74k | — | ~332 | Automated safety check: Pass | MIT | |
| Mailtrap Managing Contactssickn33/agentic-awesome-skills | 47k | 1 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Contact Widgetnexu-io/open-design | 100k | — | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| Etsy Search Listingssickn33/agentic-awesome-skills | 47k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Contactsvellum-ai/vellum-assistant | 1.4k | — | ~8.9k | Automated safety check: Pass | MIT |
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sickn33/agentic-awesome-skills
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Contact Widget
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Self-contained floating chat widget with welcome screen, social links, meeting button, and message input.
Etsy Search Listings
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Fetch live Etsy search listing rows for a keyword, market phrase, or category via Apify Actor publicrecords/etsy-search-scraper (MCP).
Contacts
vellum-ai/vellum-assistant
Manage contacts, communication channels, access control, and invite links
Recipe Sync Contacts To Sheet
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Export Google Contacts directory to a Google Sheets spreadsheet.
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Questions about Tel Mailto
What does Tel Mailto do?
A skill your agent uses when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address. Tel Mailto is an agent skill from thedaviddias/Front-End-Checklist. Use when applies to contact pages, business listing pages, headers/footers, and any page displaying a phone number or email address.
When should I use Tel Mailto?
Tel Mailto fits situations like: applies to contact pages; business listing pages; headers/footers; any page displaying a phone number.
How do I install Tel Mailto in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill tel-mailto -a claude-code`. Or copy the skill folder (skills/tel-mailto in thedaviddias/Front-End-Checklist) into .claude/skills/tel-mailto in your project. Claude Code loads it when a task matches its description.
How do I install Tel Mailto in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill tel-mailto -a codex`. Or copy the skill folder (skills/tel-mailto in thedaviddias/Front-End-Checklist) into .agents/skills/tel-mailto in your project. Codex loads it when a task matches its description.
Can I use Tel Mailto 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 tel-mailto -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tel-mailto, .gemini/skills/tel-mailto, .github/skills/tel-mailto and .opencode/skills/tel-mailto in your project.
What does Tel Mailto need to run?
SKILL.md names no scripts, command-line tools or credentials: Tel Mailto is instructions for the agent only.
Does Tel Mailto 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 Tel Mailto 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 Tel Mailto use?
Tel Mailto 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 Tel Mailto use?
About 549 tokens (SKILL.md is roughly 2.2k 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 1.1k tokens, read only when the agent opens those files.
What are the alternatives to Tel Mailto?
Skills that share tags, products or a category with Tel Mailto: Music List (ruvnet/ruflo, 74k stars), Mailtrap Managing Contacts (sickn33/agentic-awesome-skills, 47k stars), Contact Widget (nexu-io/open-design, 100k stars) and Etsy Search Listings (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tel Mailto?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,421 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.