tdd

A strict Test-Driven Development workflow. TDD means writing a failing test first, adding the smallest code that makes it pass, and then cleaning up the code.

In plain words
What is it for?
Use it to implement features in small tested steps, with support for the project’s frontend and Rust backend tests and git checkpoints after passing stages.
Why use it?
It keeps each change tied to a test and checks that refactoring does not change the intended behavior.

Command for Claude Code

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 commands/talayash/agentrium/tdd
Clone the repo
git clone --depth 1 https://github.com/talayash/agentrium

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 359 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 $0.00000 $0.00359
Opus 5 $0.00000 $0.00179
Sonnet 5 $0.00000 $0.00072
Haiku 4.5 $0.00000 $0.00036

Measured 2d ago against content hash 49c0205ded18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 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.

.claude/commands/tdd.md · 58 lines

What it actually says

TDD

Implement a feature using strict Test-Driven Development.

Instructions

Implement the following using TDD: $ARGUMENTS

The TDD Cycle

Follow this cycle strictly. Do NOT skip steps.

🔴 RED - Write a Failing Test
  1. Write a test that describes the desired behavior
  2. Run the test - it MUST fail
  3. If it passes, the test is wrong or the feature already exists
🟢 GREEN - Make It Pass
  1. Write the MINIMUM code to make the test pass
  2. Do not write more code than needed
  3. Run the test - it MUST pass now
🔵 REFACTOR - Clean Up
  1. Refactor the implementation (not the test) for clarity
  2. Run the test - it MUST still pass
  3. No behavior changes during refactor

Repeat

Continue the RED → GREEN → REFACTOR cycle for each piece of functionality.

For This Project

Frontend tests (if applicable):

  • Use Vitest for unit tests
  • Test React components with @testing-library/react
  • Test Zustand stores directly

Backend tests (if applicable):

  • Use #[cfg(test)] modules in Rust
  • Test command logic without Tauri runtime where possible
  • Use mock implementations for Database/TerminalManager

Checkpoints

Create a git checkpoint after each completed GREEN phase:

git add -A && git commit -m "checkpoint: [test description] - GREEN"

Report

After implementation:

## TDD Report
- Tests written: N
- All passing: ✅/❌
- Cycles completed: N
- Coverage: [estimate]
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 · 58 lines · 0 tokens per session scan A 49c0205ded18

Subscribe to this mod's changes

tdd is a command published in the GitHub repository talayash/agentrium (39 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 359 tokens. 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.