bug-fix-tdd

bug-fix-tdd is a command for GitHub Copilot from srnichols/plan-forge. It costs 27 tokens per session (401 once invoked), scanned A, original, MIT.

A command that fixes a bug with test-driven development, or TDD: first writing a test that fails for the bug, then making it pass, then cleaning up the code. It also runs the existing test suite to check for regressions.

In plain words
What is it for?
Use it to reproduce a .NET bug, place the fix in the appropriate controller, service, or repository layer, and verify the full test suite.
Why use it?
It proves the bug exists before the change and leaves a test that helps stop the same problem from returning.

Command for GitHub Copilot

Written for GitHub Copilot: a Copilot chat mode or prompt. Also seen: agent in frontmatter.

Good fit Use it to reproduce a .NET bug, place the fix in the appropriate controller, service, or repository layer, and verify the full test suite.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/srnichols/plan-forge/bug-fix-tdd
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.

Clone the repo
git clone --depth 1 https://github.com/srnichols/plan-forge

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 bug-fix-tdd

README.md
[![agentmods](https://agentmods.dev/badge/commands/srnichols/plan-forge/bug-fix-tdd.svg)](https://agentmods.dev/commands/srnichols/plan-forge/bug-fix-tdd)
Your own site
<a href="https://agentmods.dev/commands/srnichols/plan-forge/bug-fix-tdd"><img src="https://agentmods.dev/badge/commands/srnichols/plan-forge/bug-fix-tdd.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 401 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00027 $0.00401
Opus 5 $0.00014 $0.00200
Sonnet 5 $0.00005 $0.00080
Haiku 4.5 $0.00003 $0.00040

Measured today against content hash 36fec5e01283, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

bug-fix-tdd 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 today.

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.

presets/dotnet/.github/prompts/bug-fix-tdd.prompt.md · 49 lines

What it actually says

Fix Bug with TDD

Follow the Red-Green-Refactor cycle to fix a bug with a regression test.

Process

Step 1: Understand the Bug

  • Read the relevant source files
  • Identify the root cause
  • Determine which layer the bug is in (Controller / Service / Repository)

Step 2: RED — Write Failing Test

  • Create a test that reproduces the exact bug scenario
  • Run the test — it MUST fail (proving the bug exists)
  • Use [Fact] or [Theory] with descriptive name: {Method}_When{Condition}_Should{Expected}
  • Example: CalculateDiscount_WhenNegativePrice_ShouldThrowValidationException

Step 3: GREEN — Implement the Fix

  • Write the minimal code to make the test pass
  • Fix should be in the correct architectural layer
  • Use proper error handling (no empty catch blocks)

Step 4: REFACTOR — Clean Up

  • Clean up the fix if needed (extract methods, rename for clarity)
  • Verify all existing tests still pass
  • Run: dotnet test --no-build

Step 5: Verify

  • Run the full test suite to check for regressions
  • Confirm the original bug scenario is resolved

Architecture Rules

  • NO business logic in controllers — fix in the service layer
  • NO direct DB access in services — fix in the repository layer
  • ALL async methods must accept CancellationToken
  • ALL SQL must use parameterized queries

Reference Files

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. today First seen · 49 lines · 27 tokens per session scan A 36fec5e01283

Subscribe to this mod's changes

bug-fix-tdd is a command published in the GitHub repository srnichols/plan-forge (5 stars, last pushed today), licensed MIT. It adds 27 tokens to every session and 401 once invoked, about $0.0001 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 2026-09-08.