typescript

TypeScript coding conventions and tooling guidance. TypeScript is JavaScript with added features for describing and checking data types.

In plain words
What is it for?
Use it in projects identified by files such as tsconfig.json, package.json, .ts, or .tsx.
Why use it?
It keeps TypeScript code and its development tools consistent across a project.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/styrene-lab/omegon/typescript
Any agent
npx skills add styrene-lab/omegon --skill typescript
Clone the repo
git clone --depth 1 https://github.com/styrene-lab/omegon

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,750 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.01750
Opus 5 $0.00000 $0.00875
Sonnet 5 $0.00000 $0.00350
Haiku 4.5 $0.00000 $0.00175

Measured 2d ago against content hash 57a70345770e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

### Use `execSync` only for quick checks, never for long-running operations
skills/typescript/SKILL.md · 229 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 229 lines · 0 tokens per session scan A 57a70345770e

Subscribe to this mod's changes

typescript is a skill published in the GitHub repository styrene-lab/omegon (46 stars, last pushed 2d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 1,750 tokens. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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