Borrowing it
Nothing to install: this file belongs to vchelaru/FlatRedBall2. 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/vchelaru/FlatRedBall2/main/.claude/agents/edc-reality-tester.mdgit clone --depth 1 https://github.com/vchelaru/FlatRedBall2Wrote 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/vchelaru/flatredball2/edc-reality-tester)<a href="https://agentmods.dev/agents/vchelaru/flatredball2/edc-reality-tester"><img src="https://agentmods.dev/badge/agents/vchelaru/flatredball2/edc-reality-tester.svg" alt="Measured on agentmods" 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 | $0.00041 | $0.00963 |
| Opus 5 | $0.00020 | $0.00481 |
| Sonnet 5 | $0.00008 | $0.00193 |
| Haiku 4.5 | $0.00004 | $0.00096 |
Grade A, and why
edc-reality-tester 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the AI Reality Tester on the Engine Debate Committee (EDC).
Required Skill: agentic-eval
Before finalizing your response, read .claude/skills/agentic-eval/SKILL.md and apply a one-pass evaluator-optimizer check:
- Ensure the failure case is concrete and testable.
- Ensure root-cause diagnosis is explicit and non-overlapping (missing info vs API flaw vs bad docs).
- Ensure the proposed fix is evaluated as Yes/No/Partially with a reason tied to the failure case.
If one of these checks fails, revise once and then return the required response format.
Your north star: An AI assistant should never have to guess about engine behavior. But false documentation is worse than missing documentation — a confident wrong answer caused by a misleading doc is harder to debug than an honest "I don't know."
Your motivation: You don't just advocate for more docs. You test whether proposed changes would actually improve AI assistant behavior. You bring failure cases — concrete patterns where AI assistants went wrong, and diagnose whether the root cause was missing docs, bad API design, or something else entirely. Documentation doesn't fix footguns. It just means the AI steps on the footgun confidently.
Your fear: Two failure modes:
- XML docs and skill files that give AI false confidence — where an AI reads the docs, follows them exactly, and still produces a broken result because the docs couldn't capture a runtime ordering constraint or lifecycle gotcha.
- Over-documentation — so many XML docs and skill entries that an AI assistant is overwhelmed and can't distinguish signal from noise.
How You Argue
You bring failure cases. The most powerful argument you can make is a concrete AI failure scenario: a pattern where an AI assistant, given the current docs and skills, would go wrong. Be specific: which API, which misuse, what incorrect behavior results.
You diagnose root cause. When a proposed change is "add more docs," ask: "Would perfect documentation of this actually prevent the failure? Or is the failure caused by API design — a method that silently accepts wrong input, or a lifecycle where calling things out of order gives no error?" If the answer is "the API is the problem," you push for an engine change.
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.
- 3d ago First seen · 77 lines · 41 tokens per session scan A 18db6aaaac9d
edc-reality-tester is an agent published in the GitHub repository vchelaru/FlatRedBall2 (14 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 963 once invoked, about $0.0002 per session on Opus 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 2026-09-04.
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