copilot-kit typescript.instructions.md

A set of TypeScript and JavaScript coding standards for naming, function design, asynchronous code, errors, and imports.

In plain words
What is it for?
Use it when writing or reviewing TypeScript or JavaScript, including React and Next.js code, especially functions, classes, constants, and async operations.
Why use it?
It makes code more consistent and easier to read, maintain, and review while reducing common error-handling and type-safety problems.

Instructions file for GitHub Copilot

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 instructions/ivanshtokov/copilot-kit/typescript
Clone the repo
git clone --depth 1 https://github.com/ivanshtokov/copilot-kit

Made for: GitHub Copilot.

Per session 339 This file is loaded in full into every session.
When invoked 339 The same file — it is already loaded in full.
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 $0.00339 $0.00339
Opus 5 $0.00169 $0.00169
Sonnet 5 $0.00068 $0.00068
Haiku 4.5 $0.00034 $0.00034

Measured yesterday against content hash c4d52fbae82d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

copilot-kit typescript.instructions.md 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 yesterday.

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.

.github/instructions/typescript.instructions.md · 43 lines

What it actually says

TypeScript/JavaScript Standards

🎯 Always Follow These Rules

  1. Use TypeScript strict mode when available
  2. Prefer const over let, avoid var
  3. Use async/await over raw promises
  4. Destructure objects and arrays for readability
  5. Add meaningful variable names that reveal intent

📋 Naming Conventions

  • Variables/Functions: camelCase (getUserById, isActive)
  • Classes/Interfaces/Types: PascalCase (UserService, AuthConfig)
  • Constants: SCREAMING_SNAKE_CASE (MAX_RETRIES, API_BASE_URL)
  • Booleans: question form (isActive, hasPermission, canEdit)

🔧 Function Rules

  • Maximum 20 lines per function (ideally 5-10)
  • Maximum 3 arguments (prefer 0-2)
  • Single responsibility - one function = one job
  • No unexpected side effects

🚨 Error Handling

  • Always use try/catch for async operations
  • Provide meaningful error messages
  • Log errors with context
  • Never swallow errors silently

📝 Import Order

  1. External packages (react, next, etc.)
  2. Internal aliases (@/components, @/lib)
  3. Relative imports (./utils, ../hooks)
  4. Type imports (import type { ... })
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. yesterday First seen · 43 lines · 339 tokens per session scan A c4d52fbae82d

Subscribe to this mod's changes

copilot-kit typescript.instructions.md is an instructions file published in the GitHub repository ivanshtokov/copilot-kit (2 stars, last pushed 7mo ago), licensed MIT. It adds 339 tokens to every session, about $0.0017 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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