typescript-testing

A set of instructions for checking TypeScript changes with package tests, type checks, linting, builds, and end-to-end tests, which test complete workflows.

In plain words
What is it for?
Use it when adding tests, investigating TypeScript CI failures, selecting test commands, or validating TypeScript package changes.
Why use it?
It helps an agent choose suitable verification instead of running unrelated checks or missing important failures.

Skill for Claude CodeCodex

▶ Composio + Claude Code is Absolutely INSANE (FREE) Income stream surfers · about ComposioHQ/composio · on YouTube →
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/composiohq/composio/typescript-testing
Any agent
npx skills add ComposioHQ/composio --skill typescript-testing
Clone the repo
git clone --depth 1 https://github.com/ComposioHQ/composio

Made for: Claude Code, Codex.

Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 106 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00065 $0.00106
Opus 5 $0.00032 $0.00053
Sonnet 5 $0.00013 $0.00021
Haiku 4.5 $0.00006 $0.00011

Measured 3d ago against content hash 949dc0b93f45, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-testing scanned grade A with 0 findings 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 3d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/typescript-testing/SKILL.md · 11 lines

What it actually says

TypeScript Testing

Use this skill to choose verification for TypeScript changes.

Read references/test-commands.md before running broad checks or adding new test coverage.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 11 lines · 65 tokens per session scan A 949dc0b93f45

Subscribe to this mod's changes

typescript-testing is a skill published in the GitHub repository ComposioHQ/composio (30,003 stars, last pushed today), licensed MIT. It adds 65 tokens to every session and 106 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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