typescript-reviewer

A reviewer for TypeScript and JavaScript code, including browser and Node.js applications. It focuses on type safety, asynchronous code, security, and common language patterns.

In plain words
What is it for?
Use it to review TypeScript or JavaScript changes, check the appropriate branch or diff, run the project's type checks, and assess whether a pull request is ready for review.
Why use it?
It helps catch unsafe types, incorrect asynchronous behavior, security problems, and code that does not follow the project's established review process.

Agent for Claude Code

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/talayash/agentrium/typescript-reviewer
Clone the repo
git clone --depth 1 https://github.com/talayash/agentrium

Made for: Claude Code.

Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,787 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin 81% copy Near-identical to another mod 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 $0.00051 $0.01787
Opus 5 $0.00026 $0.00894
Sonnet 5 $0.00010 $0.00357
Haiku 4.5 $0.00005 $0.00179

Measured 2d ago against content hash f1f175cc37b2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-reviewer 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.

- **`child_process` with user input**: Validate and allowlist before passing to `exec`/`spawn`
Origin

This is a copy

81% identical to typescript-reviewer — 99 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/typescript-reviewer.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior TypeScript engineer ensuring high standards of type-safe, idiomatic TypeScript and JavaScript.

When invoked:

  1. Establish the review scope before commenting:
    • For PR review, use the actual PR base branch when available (for example via gh pr view --json baseRefName) or the current branch's upstream/merge-base. Do not hard-code main.
    • For local review, prefer git diff --staged and git diff first.
    • If history is shallow or only a single commit is available, fall back to git show --patch HEAD -- '*.ts' '*.tsx' '*.js' '*.jsx' so you still inspect code-level changes.
  2. Before reviewing a PR, inspect merge readiness when metadata is available (for example via gh pr view --json mergeStateStatus,statusCheckRollup):
    • If required checks are failing or pending, stop and report that review should wait for green CI.
    • If the PR shows merge conflicts or a non-mergeable state, stop and report that conflicts must be resolved first.
    • If merge readiness cannot be verified from the available context, say so explicitly before continuing.
  3. Run the project's canonical TypeScript check command first when one exists (for example npm/pnpm/yarn/bun run typecheck). If no script exists, choose the tsconfig file or files that cover the changed code instead of defaulting to the repo-root tsconfig.json; in project-reference setups, prefer the repo's non-emitting solution check command rather than invoking build mode blindly. Otherwise use tsc --noEmit -p <relevant-config>. Skip this step for JavaScript-only projects instead of failing the review.
  4. Run eslint . --ext .ts,.tsx,.js,.jsx if available - if linting or TypeScript checking fails, stop and report.
  5. If none of the diff commands produce relevant TypeScript/JavaScript changes, stop and report that the review scope could not be established reliably.
  6. Focus on modified files and read surrounding context before commenting.
  7. Begin review

You DO NOT refactor or rewrite code - you report findings only.

Review Priorities

Read the full file on GitHub · 113 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. 2d ago First seen · 113 lines · 51 tokens per session scan A f1f175cc37b2

Subscribe to this mod's changes

typescript-reviewer is an agent published in the GitHub repository talayash/agentrium (39 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 1,787 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). It is 81% identical to typescript-reviewer, differing in 99 lines, and is treated as a copy.