A skill your agent uses when creating or modifying Elysia API routes.

AGPL-3.0Auto-check: notes

Install API Development

skills CLI
$ npx skills add programming-in-th/programming.in.th --skill api-development -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install programming-in-th/programming.in.th api-development --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/programming-in-th/programming.in.th.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/api-development .claude/skills/api-development && rm -rf skills-src

Use ~/.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/

Facts

Skill name
api-development
GitHub stars
102
Token cost
~213 tokens
SKILL.md length
20 words
Files
1
Skills in repo
3
Repo updated
First seen
Licence
AGPL-3.0

At a glance

A skill your agent uses when creating or modifying Elysia API routes.

  • Modifying Elysia API routes
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

API Development is an agent skill from programming-in-th/programming.in.th. Use when creating or modifying Elysia API routes. Ensures proper validation with t schema, auth guards, error handling, and performance patterns.

Its SKILL.md is about 210 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Site component of programming.in.th. The licence is AGPL-3.0.

When your agent uses it

  • Modifying Elysia API routes

Example prompts

  • “/api-development”

Requirements

  • Pre-approved tools (allowed-tools): Read, Edit, Write, Glob, Grep, Bash

What it can do on your machine

Read from SKILL.md and the folder at commit 79ad808. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Edit
    • Write
    • Glob
    • Grep
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

    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

API Development loads about 213 tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 20 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~40
When it runs · the whole SKILL.md, loaded when a task matches
~213

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Edit, Write, Glob, Grep, Bash

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 programming-in-th/programming.in.th at commit 79ad808, republished under its AGPL-3.0 licence (© programming-in-th). 20 words, ~213 tokens.

Download SKILL.mdSave it as .claude/skills/api-development/SKILL.md (or your agent's skills folder).
name
api-development
description
Use when creating or modifying Elysia API routes. Ensures proper validation with t schema, auth guards, error handling, and performance patterns.
allowed-tools
Read, Edit, Write, Glob, Grep, Bash

See API patterns for full reference.

Quick example:

typescript
import { Elysia, t } from 'elysia'
import { prisma } from '@/lib/prisma'

new Elysia()
  .get('/tasks/:id', async ({ params, status }) => {
    const task = await prisma.task.findUnique({
      where: { id: params.id },
      select: { id: true, title: true }
    })
    if (!task) return status(404, { error: 'Not found' })
    return task
  }, {
    params: t.Object({ id: t.String() })
  })

Checklist: t.Object validation, auth guards, selective Prisma fields, pagination, proper status codes.

© programming-in-th, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/api-development of programming-in-th/programming.in.th.

Open the folder on GitHubat commit 79ad808

Compare with similar skills

API Development 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.

API Development compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
API Development this skillprogramming-in-th/programming.in.th102—~213Automated safety check: NotesAGPL-3.0
OmniRoute Routing CLIdiegosouzapw/OmniRoute74k—~342Automated safety check: PassMIT
OmniRoute Combo Routingdiegosouzapw/OmniRoute74k—~2.1kAutomated safety check: PassMIT
Intelligence Routeruvnet/ruflo74k—~874Automated safety check: NotesMIT
Elysia API Routesbiersoeckli/QuickStack361—~1.1kAutomated safety check: PassGPL-3.0
SPA Routes and Featureslobehub/lobehub83k—~3.2kAutomated safety check: PassCustom licence

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Questions about API Development

What does API Development do?

A skill your agent uses when creating or modifying Elysia API routes. th. Use when creating or modifying Elysia API routes.

When should I use API Development?

API Development fits situations like: modifying Elysia API routes.

How do I install API Development in Claude Code?

Run `npx skills add programming-in-th/programming.in.th --skill api-development -a claude-code`. Or copy the skill folder (.claude/skills/api-development in programming-in-th/programming.in.th) into .claude/skills/api-development in your project. Claude Code loads it when a task matches its description.

How do I install API Development in Codex?

Run `npx skills add programming-in-th/programming.in.th --skill api-development -a codex`. Or copy the skill folder (.claude/skills/api-development in programming-in-th/programming.in.th) into .agents/skills/api-development in your project. Codex loads it when a task matches its description.

Can I use API Development 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 programming-in-th/programming.in.th --skill api-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/api-development, .gemini/skills/api-development, .github/skills/api-development and .opencode/skills/api-development in your project.

What does API Development need to run?

SKILL.md names no scripts, command-line tools or credentials: API Development is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Edit, Write, Glob, Grep, Bash.

Does API Development 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 API Development safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does API Development use?

API Development is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does API Development use?

About 213 tokens (SKILL.md is roughly 852 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 API Development?

Skills that share tags, products or a category with API Development: OmniRoute Routing CLI (diegosouzapw/OmniRoute, 74k stars), OmniRoute Combo Routing (diegosouzapw/OmniRoute, 74k stars), Intelligence Route (ruvnet/ruflo, 74k stars) and Elysia API Routes (biersoeckli/QuickStack, 361 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains API Development?

programming-in-th (a GitHub organization) maintains it in programming-in-th/programming.in.th, which has 102 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 7, 2026.

Source: programming-in-th/programming.in.th on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.