vite-ts-react-template tests.instructions.md

Testing instructions for a Vite and React TypeScript project. They explain which tools and folders to use for unit, browser, story, API, and fixture tests, along with boundaries for changing existing tests.

In plain words
What is it for?
Use them when adding or updating Vitest, Storybook, Playwright, MSW, or fixture-based tests. They help decide test locations, priorities, and when approval is needed before changing test intent.
Why use it?
They provide a consistent testing setup and help prevent accidental changes to what existing tests are meant to prove. They also focus test effort on user-visible errors, realistic normal use, and important edge cases.

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/bartstc/vite-ts-react-template/tests
Clone the repo
git clone --depth 1 https://github.com/bartstc/vite-ts-react-template

Made for: GitHub Copilot.

Per session 264 This file is loaded in full into every session.
When invoked 264 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 $0.00264 $0.00264
Opus 5 $0.00132 $0.00132
Sonnet 5 $0.00053 $0.00053
Haiku 4.5 $0.00026 $0.00026

Measured 2d ago against content hash 4b3fd881446f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vite-ts-react-template tests.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 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.

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/tests.instructions.md · 29 lines

What it actually says

Testing

Tools

Type Location Tool
Unit .test.ts / .test.tsx beside src Vitest
Storybook .stories.tsx beside components Storybook
E2E e2e/ directory Playwright
API mocking test-lib/handlers/ MSW
Fixtures test-lib/fixtures/ Custom

AI Boundaries

  • Generate new test files and business logic freely
  • Modify existing tests when change is mechanical (renames, API updates, imports, type fixes). Ask first when change alters intent — assertions, setup, scenario, or expectations
  • Never delete a test without explicit request
  • Analyze test failures to help debug

Test Priorities

  • Prioritize: happy path with realistic data, user-facing error conditions, edge cases affecting business logic
  • Each test verifies distinct behavior — avoid multiple variations triggering the same code path
  • Skip redundant cases: empty arrays when "not found" is covered, undefined when types prevent it
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 · 29 lines · 264 tokens per session scan A 4b3fd881446f

Subscribe to this mod's changes

vite-ts-react-template tests.instructions.md is an instructions file published in the GitHub repository bartstc/vite-ts-react-template (121 stars, last pushed 1mo ago), licensed MIT. It adds 264 tokens to every session, about $0.0013 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 2026-08-30.