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.
npx skills add ed3dai/ed3d-plugins --skill test-driven-developmentgit clone --depth 1 https://github.com/ed3dai/ed3d-pluginsWrote 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/skills/ed3dai/ed3d-plugins/test-driven-development)<a href="https://agentmods.dev/skills/ed3dai/ed3d-plugins/test-driven-development"><img src="https://agentmods.dev/badge/skills/ed3dai/ed3d-plugins/test-driven-development/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/skills/ed3dai/ed3d-plugins/test-driven-development"><img src="https://agentmods.dev/badge/skills/ed3dai/ed3d-plugins/test-driven-development.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 | $0.00042 | $0.02387 |
| Opus 5.5 | $0.00017 | $0.00955 |
| Sonnet 5.5 | $0.00008 | $0.00477 |
| Haiku 4.5 | $0.00004 | $0.00239 |
Grade A, and why
test-driven-development 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · 366 lines · 42 tokens per session scan A 1ecc7e837989
test-driven-development is a skill published in the GitHub repository ed3dai/ed3d-plugins (252 stars, last pushed 1mo ago), with no licence file. It adds 42 tokens to every session and 2,387 once invoked, about $0.0002 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.
Other skills, from other repositories
test-genius
Use when writing tests, increasing coverage, verifying functionality, or implementing TDD — before claiming any feature or fix is complete.
tdd-arrange-act-assert
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tdd
A guide to test-driven development, or TDD, where you write a failing test, add the code that makes it pass, and then improve the code.
tdd
Use only when the user explicitly asks for TDD, a failing test, or a regression test, OR when the bug has an obvious cheap local test target. Skip when the test path is unclear, expensive, integration-heavy, or not requested.
implement
An implementation skill for turning requirements or task lists into code. TDD, or test-driven development, means writing small tests as part of the coding process.
tdd-red-green-refactor
This skill should be used when the user asks to "do TDD", "write tests first", mentions "red-green-refactor", discusses test-driven development cycles, or wants to build features incrementally with tests.