Borrowing it
Nothing to install: this file belongs to tensorbee/rdocx. 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/tensorbee/rdocx/main/.agents/skills/differential-testing/SKILL.mdgit clone --depth 1 https://github.com/tensorbee/rdocxWrote 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/tensorbee/rdocx/differential-testing)<a href="https://agentmods.dev/skills/tensorbee/rdocx/differential-testing"><img src="https://agentmods.dev/badge/skills/tensorbee/rdocx/differential-testing/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/tensorbee/rdocx/differential-testing"><img src="https://agentmods.dev/badge/skills/tensorbee/rdocx/differential-testing.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 | $0.00048 | $0.00213 |
| Opus 5.5 | $0.00019 | $0.00085 |
| Sonnet 5.5 | $0.00010 | $0.00043 |
| Haiku 4.5 | $0.00005 | $0.00021 |
Grade A, and why
differential-testing 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 6d 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
Canonical source: .claude/skills/differential-testing.md.
Source SHA-256: 9a51a09cba8267370f0ca9f47b0f202009fee95ed76bd515d3790d5faeb228e7.
Read the canonical source in full before acting, and follow it with whatever tools this host provides. Treat any invocation arguments as arguments to that workflow. Where it names another slash command, follow the repository skill of the same name. Where it says to ask with AskUserQuestion, ask through this host's own question mechanism. .claude/WORKFLOW.md wins on any process question. Do not edit this generated adapter.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago Changed 63080ec4d655
- 11d ago Changed 3eb108909f34
- 26d ago First seen · 13 lines · 48 tokens per session scan A 0d64b419d7c0
differential-testing is a skill published in the GitHub repository tensorbee/rdocx (44 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 213 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 2026-10-04.
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