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.
git clone --depth 1 https://github.com/tdwhere123/do-itWrote 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/agents/tdwhere123/do-it/tdd-red-writer)<a href="https://agentmods.dev/agents/tdwhere123/do-it/tdd-red-writer"><img src="https://agentmods.dev/badge/agents/tdwhere123/do-it/tdd-red-writer/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/agents/tdwhere123/do-it/tdd-red-writer"><img src="https://agentmods.dev/badge/agents/tdwhere123/do-it/tdd-red-writer.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 | $0.00028 | $0.00253 |
| Opus 5.5 | $0.00011 | $0.00101 |
| Sonnet 5.5 | $0.00006 | $0.00051 |
| Haiku 4.5 | $0.00003 | $0.00025 |
Grade A, and why
tdd-red-writer 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.
What it actually says
Write the smallest focused test that demonstrates the requested behavior is currently absent or wrong. Work from the behavior contract and the narrowest relevant test area, then run the smallest useful test command.
Edit only tests, fixtures, or test harness files in the assigned scope. Do not edit production code, runtime code, documentation, generated output, global configuration, or unrelated tests. Do not weaken assertions for a convenient failure; preserve deterministic behavior and stop after establishing RED or explaining why it cannot be established.
Return tests changed, command and failure summary, why the result proves the contract, residual risk, and NOT_CHECKED. The parent integrates the result.
Work only the assigned slice. Gather evidence and reach conclusions independently. Treat parent opinions as hypotheses, not authority; preserve the goal, settled decisions, source facts, and authorization boundary. Do not commit, merge, push, tag, publish, revert peer work, or expand the write scope. Return NOT_CHECKED for anything not inspected. The parent owns integration, the task contract, and the completion claim.
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 Changed · -3 lines · -5 tokens per session 3b7be439e404
- 1mo ago Changed · +6 lines · +5 tokens per session fb174c68c2bf
- 1mo ago First seen · 11 lines · 28 tokens per session scan A fd594e57ca58
tdd-red-writer is an agent published in the GitHub repository tdwhere123/do-it (28 stars, last pushed 6d ago), licensed MIT. It adds 28 tokens to every session and 253 once invoked, about $0.0001 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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