codingbuddy: Instructions file for GitHub Copilot

.github/instructions/tests.instructions.md

codingbuddy tests.instructions.md is an instructions file for GitHub Copilot from JeremyDev87/codingbuddy. It costs 150 tokens per session, scanned A, original, MIT.

A set of instructions for reviewing automated tests, covering test structure, behavior, edge cases, errors, and coverage. TDD, or test-driven development, means writing a test before the code that makes it pass.

In plain words
What is it for?
It is for reviewing or designing tests with Arrange-Act-Assert structure, real implementations, edge-case checks, error-path checks, and test-first development for core logic.
Why use it?
It helps reviews look beyond successful examples and check failure cases, boundaries, independence between tests, and important core logic.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is JeremyDev87/codingbuddy's own configuration. It tells GitHub Copilot how to work on codingbuddy itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything codingbuddy configures →

Reuse

Borrowing it

Nothing to install: this file belongs to JeremyDev87/codingbuddy. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/JeremyDev87/codingbuddy/master/.github/instructions/tests.instructions.md
Clone the repo
git clone --depth 1 https://github.com/JeremyDev87/codingbuddy

Made for: GitHub Copilot.

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 codingbuddy tests.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/jeremydev87/codingbuddy/tests/github.svg)](https://agentmods.dev/instructions/jeremydev87/codingbuddy/tests)
Your own site
<a href="https://agentmods.dev/instructions/jeremydev87/codingbuddy/tests"><img src="https://agentmods.dev/badge/instructions/jeremydev87/codingbuddy/tests/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for codingbuddy tests.instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/jeremydev87/codingbuddy/tests"><img src="https://agentmods.dev/badge/instructions/jeremydev87/codingbuddy/tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 150 This file is loaded in full into every session.
When invoked 150 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00150 $0.00150
Opus 5.5 $0.00060 $0.00060
Sonnet 5.5 $0.00030 $0.00030
Haiku 4.5 $0.00015 $0.00015

Measured 1mo ago against content hash 46fc412931cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codingbuddy 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 1mo 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 · 26 lines

What it actually says

Test Code Review

Structure

  • Follow Arrange-Act-Assert (AAA) pattern
  • One logical assertion per test
  • Descriptive test names that explain the behavior being tested
  • Group related tests with describe blocks

Quality

  • No mocking — test real behavior with actual implementations
  • Test edge cases: empty inputs, null values, boundary conditions
  • Test error paths, not just happy paths
  • Tests must be independent and not rely on execution order

Coverage

  • Core logic requires test-first TDD (Red → Green → Refactor)
  • UI components allow test-after approach
  • Target 90%+ coverage for core logic
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. 1mo ago First seen · 26 lines · 150 tokens per session scan A 46fc412931cf

Subscribe to this mod's changes

codingbuddy tests.instructions.md is an instructions file published in the GitHub repository JeremyDev87/codingbuddy (31 stars, last pushed 6mo ago), licensed MIT. It adds 150 tokens to every session, about $0.0006 per session on Opus 5.5. 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.

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