What is typescript-expert?

An AI agent focused on TypeScript, a programming language that adds type checking to JavaScript. It handles advanced type definitions, type inference, generics, decorators, migrations, performance, and type errors.

Writing complex types, fixing inference problems, adding type guards, migrating JavaScript, and improving TypeScript code.

It helps when TypeScript's type system or compiler errors are difficult to resolve manually.

How stewnight/claude-code-agents configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to stewnight/claude-code-agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/stewnight/claude-code-agents/main/.claude/agents/typescript-expert.md

Clone the repo

git clone --depth 1 https://github.com/stewnight/claude-code-agents

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/agents/stewnight/claude-code-agents/typescript-expert/github.svg)](https://agentmods.dev/agents/stewnight/claude-code-agents/typescript-expert)

Your own site

<a href="https://agentmods.dev/agents/stewnight/claude-code-agents/typescript-expert"><img src="https://agentmods.dev/badge/agents/stewnight/claude-code-agents/typescript-expert/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/agents/stewnight/claude-code-agents/typescript-expert"><img src="https://agentmods.dev/badge/agents/stewnight/claude-code-agents/typescript-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,651 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.01651
Opus 5.5	$0.00000	$0.00660
Sonnet 5.5	$0.00000	$0.00330
Haiku 4.5	$0.00000	$0.00165

Measured 2mo ago against content hash 335e03b87d39, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

typescript-expert 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 2mo 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.

.claude/agents/typescript-expert.md · 162 lines

The source is not reproduced here

No licence file

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.

2mo ago First seen · 162 lines · 0 tokens per session scan A 335e03b87d39

Subscribe to this mod's changes

typescript-expert is an agent published in the GitHub repository stewnight/claude-code-agents (2 stars, last pushed 1y ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 1,651 tokens. 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 2026-08-31.

Languages TypeScript

typescript-expert next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
typescript-expertstewnight/claude-code-agents	Agent	2	1y ago	none	A	0	Claude Code
Next.js Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	B	33	Claude Code
frontend-devvibeeval/vibecosystem	Agent	539	2d ago	MIT	A	22	Claude Code
frontend-engineerjpoley/flowspec	Agent	50	28d ago	Apache-2.0	A	24	Claude Code
effect-architecture-reviewerbengous/claude-code-plugins	Agent	6	yesterday	MIT	A	50	Claude Code
typescript-developernasrulhazim/claude	Agent	26	9d ago	MIT	A	86	Claude Code
typescript-code-revieweroikon48/claudecode-book	Agent	24	2mo ago	MIT	A	157	Claude Code

claude-code-agents: Agent for Claude Code