Borrowing it
Nothing to install: this file belongs to floor/vlist. 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/floor/vlist/main/.claude/skills/diagnose-test/SKILL.mdgit clone --depth 1 https://github.com/floor/vlistWrote 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/floor/vlist/diagnose-test)<a href="https://agentmods.dev/skills/floor/vlist/diagnose-test"><img src="https://agentmods.dev/badge/skills/floor/vlist/diagnose-test/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/floor/vlist/diagnose-test"><img src="https://agentmods.dev/badge/skills/floor/vlist/diagnose-test.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 | $0.00021 | $0.00368 |
| Opus 5.5 | $0.00008 | $0.00147 |
| Sonnet 5.5 | $0.00004 | $0.00074 |
| Haiku 4.5 | $0.00002 | $0.00037 |
Grade A, and why
diagnose-test 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
Diagnose Failing Test
Debug a failing vlist test with full context.
Instructions
-
Run the failing test:
bun test $ARGUMENTS 2>&1
-
If the test passes, report that and stop.
-
If it fails, gather context:
- Read the full test file
- Identify which source file(s) the test covers (from imports)
- Read those source files
- Read relevant test helpers if used (
test/helpers/)
-
Analyze the failure:
- What does the test expect?
- What actually happened?
- Is this a test bug or a source bug?
- If it's a recent regression, check
git log --oneline -10 -- <source-file>for recent changes
-
Output:
## Failing Test **File:** test/plugins/async/plugin.test.ts **Test:** "should cancel load when velocity exceeds threshold" **Error:** Expected 0 but received 1 ## Diagnosis The test expects `loadAdapter.load` to not be called when velocity > LOAD_VELOCITY_THRESHOLD, but the velocity check in src/features/async/feature.ts:87 uses `>=` instead of `>`. ## Suggested Fix Change line 87 from `velocity >= threshold` to `velocity > threshold`, or update the test to use a velocity strictly above the threshold. -
Be specific — include line numbers, variable names, and exact values.
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 · 48 lines · 21 tokens per session scan A cec81a3b0f58
diagnose-test is a skill published in the GitHub repository floor/vlist (18 stars, last pushed 9d ago), licensed MIT. It adds 21 tokens to every session and 368 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 2026-09-01.
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