Typescript Best Practices
bretzel-app/crumbs
Provides TypeScript patterns for type-first development, making illegal states unrepresentable, exhaustive handling, and runtime validation.
Guides ccusage TypeScript and JavaScript work. An agent skill from ccusage/ccusage.
Install Typescript
$ npx skills add ccusage/ccusage --skill typescript -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ccusage/ccusage typescript --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/ccusage/ccusage.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/typescript .claude/skills/typescript && 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 "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .claude/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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/ccusage/ccusage/tree/main/.agents/skills/typescriptType 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 ccusage/ccusage --skill typescript -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ccusage/ccusage typescript --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ccusage/ccusage.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/typescript .agents/skills/typescript && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .agents/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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 ccusage/ccusage --skill typescript -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ccusage/ccusage typescript --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ccusage/ccusage.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/typescript .cursor/skills/typescript && 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 "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .cursor/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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/ccusage/ccusage.git --path .agents/skills/typescript--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 ccusage/ccusage --skill typescript -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ccusage/ccusage typescript --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ccusage/ccusage.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/typescript .gemini/skills/typescript && 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 "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .gemini/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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 ccusage/ccusage typescriptInstalls 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 ccusage/ccusage --skill typescript -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ccusage/ccusage.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/typescript .github/skills/typescript && 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 "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .github/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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 ccusage/ccusage --skill typescript -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ccusage/ccusage typescript --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ccusage/ccusage.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/typescript .opencode/skills/typescript && 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 "typescript" agent skill from https://github.com/ccusage/ccusage/tree/main/.agents/skills/typescript into .opencode/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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
typescript- GitHub stars
- 19k
- Token cost
- ~696 tokens
- SKILL.md length
- 300 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guides ccusage TypeScript and JavaScript work. An agent skill from ccusage/ccusage.
- Tasks that involve React components
- SKILL.md covers Style and Routing
- Calls just
What it does
Typescript is an agent skill from ccusage/ccusage. Guides ccusage TypeScript and JavaScript work. Use before reading or editing .ts, .tsx, .js, or .jsx files, including the npm launcher, Node tests, build and fixture scripts, mocks, and typed literals.
Its SKILL.md is about 700 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 Frontend & Design, covering React components. It works with TypeScript, JavaScript and npm.
When your agent uses it
- Tasks that involve React components
Example prompts
- “Use the typescript skill to guide ccusage TypeScript and JavaScript work. An agent skill from ccusage/ccusage”
- “/typescript”
What it can do on your machine
Read from SKILL.md and the folder at commit d2fd844. 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
Shell commands in SKILL.md call:
just
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
Typescript loads about 696 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 300 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 300 words (~696 tokens).
“Runtime CLI behavior lives in Rust under rust/. New adapter logic belongs there, not here, unless the user scopes work to the package layer. What remains in TypeScript and JavaScript:”
- name
- typescript
- paths
- **/*.ts, **/*.tsx, **/*.js, **/*.jsx
- globs
- *.ts,*.tsx,*.js,*.jsx
Files
Just SKILL.md in .agents/skills/typescript of ccusage/ccusage.
Open the folder on GitHubat commit d2fd844
Compare with similar skills
Typescript 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 |
|---|---|---|---|---|---|---|
| Typescript this skillccusage/ccusage | 19k | — | ~696 | Automated safety check: Pass | Custom licence | |
| Typescript Best Practicesbretzel-app/crumbs | 127 | 1 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Compare Array Bundle SizePostHog/posthog-js | 613 | — | ~599 | Automated safety check: Pass | Custom licence | |
| Connect Component To Figmadequelabs/cauldron | 129 | — | ~2k | Automated safety check: Pass | MPL-2.0 | |
| npm Library Setupvana-com/personal-server | 116 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Spotpatchhuanglvjing/spotpatch | 134 | — | ~998 | Automated safety check: Pass | MIT |
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Categories
Questions about Typescript
What does Typescript do?
Guides ccusage TypeScript and JavaScript work. An agent skill from ccusage/ccusage. Typescript is an agent skill from ccusage/ccusage. Guides ccusage TypeScript and JavaScript work.
When should I use Typescript?
Typescript fits situations like: tasks that involve React components.
How do I install Typescript in Claude Code?
Run `npx skills add ccusage/ccusage --skill typescript -a claude-code`. Or copy the skill folder (.agents/skills/typescript in ccusage/ccusage) into .claude/skills/typescript in your project. Claude Code loads it when a task matches its description.
How do I install Typescript in Codex?
Run `npx skills add ccusage/ccusage --skill typescript -a codex`. Or copy the skill folder (.agents/skills/typescript in ccusage/ccusage) into .agents/skills/typescript in your project. Codex loads it when a task matches its description.
Can I use Typescript 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 ccusage/ccusage --skill typescript -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/typescript, .gemini/skills/typescript, .github/skills/typescript and .opencode/skills/typescript in your project.
What does Typescript need to run?
Going by SKILL.md and its folder, Typescript needs the command-line tools its instructions call (just).
Does Typescript 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 Typescript 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 Typescript use?
Typescript 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 Typescript use?
About 696 tokens (SKILL.md is roughly 2.8k 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 Typescript?
Skills that share tags, products or a category with Typescript: Typescript Best Practices (bretzel-app/crumbs, 127 stars), Compare Array Bundle Size (PostHog/posthog-js, 613 stars), Connect Component To Figma (dequelabs/cauldron, 129 stars) and npm Library Setup (vana-com/personal-server, 116 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Typescript?
ccusage (a GitHub organization) maintains it in ccusage/ccusage, which has 18,901 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 7, 2026.
Source: ccusage/ccusage on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.