SQL Optimization Patterns
ynulihao/AgentSkillOS
Master SQL query optimization, indexing strategies, and EXPLAIN analysis to dramatically improve database performance and eliminate slow queries.
A skill for implementing passkey in web applications. An agent skill from GoogleChrome/modern-web-guidance-src.
Install Passkeys Web
$ npx skills add GoogleChrome/modern-web-guidance-src --skill passkeys-web -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src passkeys-web --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/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills-src/passkeys .claude/skills/passkeys-web && 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 "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .claude/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeysType 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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src passkeys-web --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills-src/passkeys .agents/skills/passkeys-web && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .agents/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src passkeys-web --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills-src/passkeys .cursor/skills/passkeys-web && 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 "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .cursor/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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/GoogleChrome/modern-web-guidance-src.git --path skills-src/passkeys--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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src passkeys-web --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills-src/passkeys .gemini/skills/passkeys-web && 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 "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .gemini/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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 GoogleChrome/modern-web-guidance-src passkeys-webInstalls 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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills-src/passkeys .github/skills/passkeys-web && 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 "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .github/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src passkeys-web --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills-src/passkeys .opencode/skills/passkeys-web && 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 "passkeys-web" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/skills-src/passkeys into .opencode/skills/passkeys-web/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "passkeys-web", 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
passkeys-web- GitHub stars
- 1.1k
- Token cost
- ~664 tokens
- SKILL.md length
- 186 words
- Files
- 10 (incl. references)
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
A skill for implementing passkey in web applications. An agent skill from GoogleChrome/modern-web-guidance-src.
- A user asks about passkey registartion
- SKILL.md covers Implementation Phase, Evaluation, References and Recommended Libraries
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Passkey authentication
What it does
Passkeys Web is an agent skill from GoogleChrome/modern-web-guidance-src. A skill for implementing passkey in web applications. You MUST use this skill whenever a user asks about passkey registartion, passkey authentication or passkey management. It defines the required database schema, API usage, and security best practices.
Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. The skill folder holds 10 other files, including reference files (for example `authentication.md`, `evaluating-passkeys.md` and `management.md`).
It sits in Databases, covering Database schema design. The licence is Apache-2.0.
When your agent uses it
- A user asks about passkey registartion
- Passkey authentication
- Passkey management
Example prompts
- “/passkeys-web”
What it can do on your machine
Read from SKILL.md and the folder at commit 271a550. 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):
github.com
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
Passkeys Web loads about 664 tokens when it runs, and up to ~3.2k if it reads all its reference files. Until then it costs about 67 tokens; SKILL.md has 186 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 GoogleChrome/modern-web-guidance-src at commit 271a550, republished under its Apache-2.0 licence (© GoogleChrome). 186 words, ~664 tokens.
Download SKILL.mdSave it as
.claude/skills/passkeys-web/SKILL.md (or your agent's skills folder). This skill also uses 9 other files; get the full folder from GitHub.- name
- passkeys-web
- description
- A skill for implementing passkey in web applications. You MUST use this skill whenever a user asks about passkey registartion, passkey authentication or passkey management. It defines the required database schema, API usage, and security best practices.
- license
- Apache-2.0
Passkeys Implementation Guide (Web)
This skill provides a modular guide to implementing passkeys
Implementation Phase
- Registration: Allowing users to create new passkeys.
- Authentication: Logging users in with passkeys.
- Management: Listing, renaming, and deleting passkeys.
- Reauthentication: Logging users back in with passkeys.
Evaluation
- Evaluate Passkey Skills: Evaluate passkey skills.
References
You MUST read the following references when implementing their respective features:
- Conditional Create: Read this before implementing automatic passkey creation or conditional create.
- Conditional Mediation: Read this before implementing form autofill based passkey authentication.
- Signal API: Read this before implementing any
PublicKeyCredential.signal*methods. - AAGUID Resolution: Read this before saving a new credential to the database during registration to map the provider name and icon.
Recommended Libraries
For backend, using a library is recommended. Here's a list of recommended open source libraries per language:
- JavaScript/TypeScript: SimpleWebAuthn
- Python: py_webauthn
- Java: Java WebAuthn Server , WebAuthn4J, LINE FIDO2 Server
- .Net: .Net library for FIDO2, WebAuthn.Net
- Go: WebAuthn Go Library, Passkey Server
- Ruby: WebAuthn Ruby
- PHP: WebAuthn PHP Library, WebAuthn Framework
If you are using one of the libraries above, use the following skills:
- Use [[simplewebauthn]] skill when implementing passkeys using SimpleWebAuthn
© GoogleChrome, Apache-2.0. 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 9 other files (references) in skills-src/passkeys of GoogleChrome/modern-web-guidance-src.
- SKILL.md
- authentication.md
- evaluating-passkeys.md
- management.md
- reauthentication.md
- references/conditional-create.md
- references/conditional-mediation.md
- references/determine-passkey-provider-from-aaguid.md
- references/signal-api.md
- registration.md
Open the folder on GitHubat commit 271a550
Compare with similar skills
Passkeys Web 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 |
|---|---|---|---|---|---|---|
| Passkeys Web this skillGoogleChrome/modern-web-guidance-src | 1.1k | — | ~664 | Automated safety check: Pass | Apache-2.0 | |
| SQL Optimization Patternsynulihao/AgentSkillOS | 617 | 11 repos | ~3.3k | Automated safety check: Pass | None | |
| Add Mpk Taskmirage-project/mirage | 2.5k | — | ~4.5k | Automated safety check: Pass | Apache-2.0 | |
| Datamodellmnimbalyst/nimbalyst | 1.9k | — | ~713 | Automated safety check: Pass | MIT | |
| B200 Flash Attention4 Plannermirage-project/mirage | 2.5k | — | ~1.9k | Automated safety check: Pass | Apache-2.0 | |
| Experiment Auditwanshuiyin/Auto-claude-code-research-in-sleep | 17k | 1 repos | ~2.7k | Automated safety check: Notes | MIT |
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Categories
Questions about Passkeys Web
What does Passkeys Web do?
A skill for implementing passkey in web applications. An agent skill from GoogleChrome/modern-web-guidance-src. Passkeys Web is an agent skill from GoogleChrome/modern-web-guidance-src. A skill for implementing passkey in web applications.
When should I use Passkeys Web?
Passkeys Web fits situations like: A user asks about passkey registartion; passkey authentication; passkey management.
How do I install Passkeys Web in Claude Code?
Run `npx skills add GoogleChrome/modern-web-guidance-src --skill passkeys-web -a claude-code`. Or copy the skill folder (skills-src/passkeys in GoogleChrome/modern-web-guidance-src) into .claude/skills/passkeys-web in your project. Claude Code loads it when a task matches its description.
How do I install Passkeys Web in Codex?
Run `npx skills add GoogleChrome/modern-web-guidance-src --skill passkeys-web -a codex`. Or copy the skill folder (skills-src/passkeys in GoogleChrome/modern-web-guidance-src) into .agents/skills/passkeys-web in your project. Codex loads it when a task matches its description.
Can I use Passkeys Web 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 GoogleChrome/modern-web-guidance-src --skill passkeys-web -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/passkeys-web, .gemini/skills/passkeys-web, .github/skills/passkeys-web and .opencode/skills/passkeys-web in your project.
What does Passkeys Web need to run?
SKILL.md names no scripts, command-line tools or credentials: Passkeys Web is instructions for the agent only.
Does Passkeys Web access the network?
SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.
Is Passkeys Web 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 Passkeys Web use?
Passkeys Web is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Passkeys Web use?
About 664 tokens (SKILL.md is roughly 2.7k 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 2.6k tokens, read only when the agent opens those files.
What are the alternatives to Passkeys Web?
Skills that share tags, products or a category with Passkeys Web: SQL Optimization Patterns (ynulihao/AgentSkillOS, 617 stars), Add Mpk Task (mirage-project/mirage, 2.5k stars), Datamodellm (nimbalyst/nimbalyst, 1.9k stars) and B200 Flash Attention4 Planner (mirage-project/mirage, 2.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Passkeys Web?
GoogleChrome (a GitHub organization) maintains it in GoogleChrome/modern-web-guidance-src, which has 1,138 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on October 8, 2026.
Source: GoogleChrome/modern-web-guidance-src on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.