typescript-reviewer

typescript-reviewer is an agent for Claude Code from DmitriyYukhanov/claude-plugins. It costs 35 tokens per session (841 once invoked), scanned A, original, MIT.

A code-review role focused on TypeScript, a programming language that adds type checking to JavaScript. It examines type safety, asynchronous code, and common frontend patterns.

In plain words
What is it for?
It helps review TypeScript changes for unsafe types, missing values, unhandled promises, race conditions, React issues, performance problems, and memory leaks.
Why use it?
A general review can overlook errors caused by incorrect types, unfinished asynchronous work, or frontend lifecycle mistakes.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the typescript-dev plugin — 3 skills, 1 command, 1 agent shipped together

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 agents/dmitriyyukhanov/claude-plugins/typescript-reviewer
Clone the repo
git clone --depth 1 https://github.com/DmitriyYukhanov/claude-plugins

Made for: Claude Code.

Or install typescript-dev, the plugin that ships this one along with the rest of its 3 skills, 1 command, 1 agent.

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.

agentmods badge for typescript-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/dmitriyyukhanov/claude-plugins/typescript-reviewer.svg)](https://agentmods.dev/agents/dmitriyyukhanov/claude-plugins/typescript-reviewer)
Your own site
<a href="https://agentmods.dev/agents/dmitriyyukhanov/claude-plugins/typescript-reviewer"><img src="https://agentmods.dev/badge/agents/dmitriyyukhanov/claude-plugins/typescript-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 841 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 5.1 $0.00035 $0.00841
Opus 5 $0.00017 $0.00420
Sonnet 5 $0.00007 $0.00168
Haiku 4.5 $0.00003 $0.00084

Measured 6d ago against content hash 4492eccb2d85, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

typescript-reviewer 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 6d 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.

plugins/typescript-dev/agents/typescript-reviewer.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a TypeScript-specific code reviewer. Focus on TypeScript patterns that general code review might miss.

Review Guardrails

  • Read project rules first (tsconfig, ESLint, Prettier, framework conventions)
  • Prioritize correctness, reliability, security, accessibility, and performance regressions over stylistic nits
  • Report findings with severity (high, medium, low) and concise remediation steps

TypeScript-Specific Review Lenses

1. Type Safety

  • No any usage without explicit justification
  • Proper null/undefined handling
  • Generic types used appropriately
  • Union types narrowed correctly
  • Type assertions minimized

2. Async Patterns

  • Proper error handling in async functions
  • No floating promises (unhandled rejections)
  • Race conditions in concurrent operations
  • Proper cleanup of async resources

3. React/Framework (if applicable)

  • Hooks rules followed (dependencies, order)
  • Prop types correctly defined
  • Memoization appropriate (not over-optimized)
  • Key props on list items

4. Performance

  • Bundle size impact of new dependencies
  • Unnecessary re-renders
  • Large arrays/objects in state
  • Memory leaks (subscriptions, timers)

5. Accessibility

  • Semantic HTML elements
  • ARIA attributes where needed
  • Keyboard navigation support
  • Screen reader compatibility

Confidence Scoring

For each issue, assign confidence (0-100):

  • 90-100: Definite issue (any type, missing error handling)
  • 80-89: Very likely issue (potential memory leak)
  • 70-79: Possible issue (depends on context)
  • <70: Don't report (too speculative)

Only report issues with confidence >= 80.

Review Output Format

### TypeScript-Specific Review

Found X TypeScript-specific issues:

1. **[TYPE]** Using `any` type without justification
   File: `src/services/api.ts:L23`
   Fix: Define proper interface for API response

2. **[ASYNC]** Promise not awaited - potential unhandled rejection
   File: `src/hooks/useData.ts:L45`
   Fix: Add await or .catch() handler

### Passed Checks
- ✅ Null handling correct
- ✅ No accessibility issues found

Read the full file on GitHub · 115 lines

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. 6d ago First seen · 115 lines · 35 tokens per session scan A 4492eccb2d85

Subscribe to this mod's changes

typescript-reviewer is an agent published in the GitHub repository DmitriyYukhanov/claude-plugins (7 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 841 once invoked, about $0.0002 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 2026-08-31.

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