Subspace Clients
dallison/subspace
Write Subspace clients in C++, Python, Rust, or Java. An agent skill from dallison/subspace.
You MUST use this skill when working with C++, C, Rust code to implement or modify WebIDL interfaces and their native implementations.
Install Gecko Web Standard Implementation
$ npx skills add BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install BrowserWorks/waterfox-android gecko-web-standard-implementation --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/BrowserWorks/waterfox-android.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .claude/skills/gecko-web-standard-implementation && 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 "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .claude/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementationType 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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install BrowserWorks/waterfox-android gecko-web-standard-implementation --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BrowserWorks/waterfox-android.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .agents/skills/gecko-web-standard-implementation && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .agents/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install BrowserWorks/waterfox-android gecko-web-standard-implementation --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BrowserWorks/waterfox-android.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .cursor/skills/gecko-web-standard-implementation && 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 "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .cursor/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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/BrowserWorks/waterfox-android.git --path .agents/skills/gecko-web-standard-implementation--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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install BrowserWorks/waterfox-android gecko-web-standard-implementation --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BrowserWorks/waterfox-android.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .gemini/skills/gecko-web-standard-implementation && 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 "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .gemini/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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 BrowserWorks/waterfox-android gecko-web-standard-implementationInstalls 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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/BrowserWorks/waterfox-android.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .github/skills/gecko-web-standard-implementation && 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 "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .github/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install BrowserWorks/waterfox-android gecko-web-standard-implementation --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BrowserWorks/waterfox-android.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/gecko-web-standard-implementation .opencode/skills/gecko-web-standard-implementation && 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 "gecko-web-standard-implementation" agent skill from https://github.com/BrowserWorks/waterfox-android/tree/main/.agents/skills/gecko-web-standard-implementation into .opencode/skills/gecko-web-standard-implementation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gecko-web-standard-implementation", 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
gecko-web-standard-implementation- GitHub stars
- 379
- Used in
- 2 other repos
- Token cost
- ~493 tokens
- SKILL.md length
- 260 words
- Files
- 1
- Skills in repo
- 10
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
You MUST use this skill when working with C++, C, Rust code to implement or modify WebIDL interfaces and their native implementations.
- Working with C++
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Rust code to implement
- Modify WebIDL interfaces and their native implementations
What it does
Gecko Web Standard Implementation is an agent skill from BrowserWorks/waterfox-android. You MUST use this skill when working with C++, C, Rust code to implement or modify WebIDL interfaces and their native implementations.
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development. It works with C++, Rust and Android.
When your agent uses it
- Working with C++
- Rust code to implement
- Modify WebIDL interfaces and their native implementations
Example prompts
- “/gecko-web-standard-implementation”
What it can do on your machine
Read from SKILL.md and the folder at commit 500d48c. 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
No URLs in SKILL.md.
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
Gecko Web Standard Implementation loads about 493 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 260 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 260 words (~493 tokens).
- name
- gecko-web-standard-implementation
Files
Just SKILL.md in .agents/skills/gecko-web-standard-implementation of BrowserWorks/waterfox-android.
Open the folder on GitHubat commit 500d48c
Used in 3 other repositories
We found 7 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in BrowserWorks/waterfox-android, which our catalogue first saw on October 7, 2026.
- mozilla-firefox/firefox.agents/skills/gecko-web-standard-implementation.claude/skills/gecko-web-standard-implementation
- SAP/project-foxhound.agents/skills/gecko-web-standard-implementation.claude/skills/gecko-web-standard-implementation
- BrowserWorks/waterfox.agents/skills/gecko-web-standard-implementation.claude/skills/gecko-web-standard-implementation
Compare with similar skills
Gecko Web Standard Implementation 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 |
|---|---|---|---|---|---|---|
| Gecko Web Standard Implementation this skillBrowserWorks/waterfox-android | 379 | 2 repos | ~493 | Automated safety check: Pass | Custom licence | |
| Subspace Clientsdallison/subspace | 104 | — | ~2.4k | Automated safety check: Pass | Apache-2.0 | |
| jscpd Code Migration Trackerkucherenko/jscpd | 6.4k | — | ~5k | Automated safety check: Pass | MIT | |
| SeekDB Code Reviewoceanbase/seekdb | 3.1k | — | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| Add Grammarafnanenayet/diffsitter | 2.4k | — | ~1.9k | Automated safety check: Notes | MIT | |
| ExecuTorch Build Guidepytorch/executorch | 5.1k | — | ~2.3k | Automated safety check: Notes | Custom licence |
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SeekDB Code Review
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Reviews seekdb pull requests and diffs for real defects in correctness, resources, concurrency, security and tests, reporting only Blocker or Major findings.
Add Grammar
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Step-by-step guide for adding a new tree-sitter language grammar to diffsitter.
ExecuTorch Build Guide
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Builds ExecuTorch from source: the Python package, C++ runtime, model runners, Android and iOS cross-compilation and backend-specific builds, with environment checks.
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Related
Categories
Questions about Gecko Web Standard Implementation
What does Gecko Web Standard Implementation do?
You MUST use this skill when working with C++, C, Rust code to implement or modify WebIDL interfaces and their native implementations. Gecko Web Standard Implementation is an agent skill from BrowserWorks/waterfox-android. You MUST use this skill when working with C++, C, Rust code to implement or modify WebIDL interfaces and their native implementations.
When should I use Gecko Web Standard Implementation?
Gecko Web Standard Implementation fits situations like: working with C++; rust code to implement; modify WebIDL interfaces and their native implementations.
How do I install Gecko Web Standard Implementation in Claude Code?
Run `npx skills add BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a claude-code`. Or copy the skill folder (.agents/skills/gecko-web-standard-implementation in BrowserWorks/waterfox-android) into .claude/skills/gecko-web-standard-implementation in your project. Claude Code loads it when a task matches its description.
How do I install Gecko Web Standard Implementation in Codex?
Run `npx skills add BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a codex`. Or copy the skill folder (.agents/skills/gecko-web-standard-implementation in BrowserWorks/waterfox-android) into .agents/skills/gecko-web-standard-implementation in your project. Codex loads it when a task matches its description.
Can I use Gecko Web Standard Implementation 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 BrowserWorks/waterfox-android --skill gecko-web-standard-implementation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gecko-web-standard-implementation, .gemini/skills/gecko-web-standard-implementation, .github/skills/gecko-web-standard-implementation and .opencode/skills/gecko-web-standard-implementation in your project.
What does Gecko Web Standard Implementation need to run?
SKILL.md names no scripts, command-line tools or credentials: Gecko Web Standard Implementation is instructions for the agent only.
Does Gecko Web Standard Implementation access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Gecko Web Standard Implementation 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 Gecko Web Standard Implementation use?
Gecko Web Standard Implementation has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Gecko Web Standard Implementation use?
About 493 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Gecko Web Standard Implementation?
Skills that share tags, products or a category with Gecko Web Standard Implementation: Subspace Clients (dallison/subspace, 104 stars), jscpd Code Migration Tracker (kucherenko/jscpd, 6.4k stars), SeekDB Code Review (oceanbase/seekdb, 3.1k stars) and Add Grammar (afnanenayet/diffsitter, 2.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Gecko Web Standard Implementation?
BrowserWorks (a GitHub organization) maintains it in BrowserWorks/waterfox-android, which has 379 GitHub stars. The repository holds 10 skills in this directory. The repository was last updated on September 22, 2026.
Source: BrowserWorks/waterfox-android on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.