typescript-specifications

typescript-specifications is a skill for Claude Code, Codex from danweinerdev/claude-sdd-planner. It costs 60 tokens per session (171 once invoked), scanned A, original, MIT.

A code-checking routine for TypeScript and JavaScript projects. It runs the TypeScript compiler without creating files and runs ESLint or Biome when the project has one configured.

In plain words
What is it for?
Use it while planning, writing, or reviewing files such as .ts, .tsx, .js, .jsx, tsconfig.json, and package.json.
Why use it?
It catches type mistakes, missing properties, incorrect generic types, unused variables, unreachable code, and other common problems before they reach users.

Skill for Claude CodeCodex

Part of the sdd-planner plugin — 34 skills, 8 agents 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 skills/danweinerdev/claude-sdd-planner/typescript-specifications
Any agent
npx skills add danweinerdev/claude-sdd-planner --skill typescript-specifications
Clone the repo
git clone --depth 1 https://github.com/danweinerdev/claude-sdd-planner

Made for: Claude Code, Codex.

Or install sdd-planner, the plugin that ships this one along with the rest of its 34 skills, 8 agents.

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-specifications

README.md
[![agentmods](https://agentmods.dev/badge/skills/danweinerdev/claude-sdd-planner/typescript-specifications.svg)](https://agentmods.dev/skills/danweinerdev/claude-sdd-planner/typescript-specifications)
Your own site
<a href="https://agentmods.dev/skills/danweinerdev/claude-sdd-planner/typescript-specifications"><img src="https://agentmods.dev/badge/skills/danweinerdev/claude-sdd-planner/typescript-specifications.svg" alt="Measured on agentmods" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 171 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 $0.00060 $0.00171
Opus 5 $0.00030 $0.00086
Sonnet 5 $0.00012 $0.00034
Haiku 4.5 $0.00006 $0.00017

Measured 4d ago against content hash 15911d8943f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-specifications 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 4d 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.

skills/typescript-specifications/SKILL.md · 19 lines

What it actually says

TypeScript / JavaScript — Structural Verification

Tools

Tool When What it catches
tsc --noEmit TypeScript projects Type errors, missing properties, incorrect generics
Linter (eslint / biome) If configured in project Unused variables, unreachable code, common bugs

Minimum Bar

Type-check TypeScript projects. Run the linter if configured.

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. 4d ago First seen · 19 lines · 60 tokens per session scan A 15911d8943f8

Subscribe to this mod's changes

typescript-specifications is a skill published in the GitHub repository danweinerdev/claude-sdd-planner (2 stars, last pushed yesterday), licensed MIT. It adds 60 tokens to every session and 171 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 2026-08-31.