Borrowing it
Nothing to install: this file belongs to marshall0524/everythingclaudecode. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/marshall0524/everythingclaudecode/main/.opencode/commands/tdd.mdgit clone --depth 1 https://github.com/marshall0524/everythingclaudecodeWrote 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.
[](https://agentmods.dev/commands/marshall0524/everythingclaudecode/tdd)<a href="https://agentmods.dev/commands/marshall0524/everythingclaudecode/tdd"><img src="https://agentmods.dev/badge/commands/marshall0524/everythingclaudecode/tdd/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.
<a href="https://agentmods.dev/commands/marshall0524/everythingclaudecode/tdd"><img src="https://agentmods.dev/badge/commands/marshall0524/everythingclaudecode/tdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00011 | $0.00422 |
| Opus 5.5 | $0.00004 | $0.00169 |
| Sonnet 5.5 | $0.00002 | $0.00084 |
| Haiku 4.5 | $0.00001 | $0.00042 |
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 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.
This is a copy
100% identical to tdd — 85 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
TDD Command
Implement the following using strict test-driven development: $ARGUMENTS
TDD Cycle (MANDATORY)
RED → GREEN → REFACTOR → REPEAT
- RED: Write a failing test FIRST
- GREEN: Write minimal code to pass the test
- REFACTOR: Improve code while keeping tests green
- REPEAT: Continue until feature complete
Your Task
Step 1: Define Interfaces (SCAFFOLD)
- Define TypeScript interfaces for inputs/outputs
- Create function signature with
throw new Error('Not implemented')
Step 2: Write Failing Tests (RED)
- Write tests that exercise the interface
- Include happy path, edge cases, and error conditions
- Run tests - verify they FAIL
Step 3: Implement Minimal Code (GREEN)
- Write just enough code to make tests pass
- No premature optimization
- Run tests - verify they PASS
Step 4: Refactor (IMPROVE)
- Extract constants, improve naming
- Remove duplication
- Run tests - verify they still PASS
Step 5: Check Coverage
- Target: 80% minimum
- 100% for critical business logic
- Add more tests if needed
Coverage Requirements
| Code Type | Minimum |
|---|---|
| Standard code | 80% |
| Financial calculations | 100% |
| Authentication logic | 100% |
| Security-critical code | 100% |
Test Types to Include
- Unit Tests: Individual functions
- Edge Cases: Empty, null, max values, boundaries
- Error Conditions: Invalid inputs, network failures
- Integration Tests: API endpoints, database operations
MANDATORY: Tests must be written BEFORE implementation. Never skip the RED phase.
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.
- 1mo ago First seen · 67 lines · 11 tokens per session scan A 0f57c5163f08
tdd is a command published in the GitHub repository marshall0524/everythingclaudecode (41 stars, last pushed 3mo ago), licensed MIT. It adds 11 tokens to every session and 422 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to tdd, differing in 85 lines, and is treated as a copy.
Other commands, from other repositories
bugfix
Bug fix workflow: root cause analysis → user review → regression test + fix via TDD.
eval
Evaluate and improve one healthcare agent's system prompt. Run up to 5 iterations of: prepare fixed questions -> answer -> judge -> improve -> re-score -> commit if better.
usage-add
PitWay: Accumulate measured planning or qa token usage onto a milestone.
speckit.tdd.plan
Derive the feature's test list by delegating to zfa tdd plan (deterministic engine); falls back to LLM-guided derivation only when zfa is unavailable.
dashboard
Generar dashboard HTML local con métricas de eficiencia del proyecto SDD.
tdd
A command that follows test-driven development (TDD), a method where you write tests before the code they check. It moves through writing a failing test, adding the smallest implementation, and then improving the code.