prompt-testing skillA
prompt-testing is agent-read markdown (skill) from fusengine/agents: Use when comparing two prompt variants, defining quality/efficiency/robustness metrics, or deciding whether to adopt a challenger prompt over a baseline..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
<objective> Prompt Testing runs A/B comparisons between prompt variants through a 5-step workflow: define the objective and metrics, prepare variants A/B and a test dataset, execute on the dataset, analyze and compare results, then decide. Metrics span three categories -- quality (accuracy, compliance, consistency, relevance), efficiency (input/output tokens, latency, cost), and robustness (edge-case handling, jailbreak resistance, error recovery) -- plus a UX category detailed in `metrics.md`. The adoption decision is rule-based: adopt B if its accuracy is at least equal with acceptable token cost, consider B as a trade-off if accuracy improves >10% despite <20% token regression, otherwise keep A or iterate. Requires a minimum of 20 test cases with 15-20% edge cases for statistical significance. </objective> # Prompt Testing Skill for testing, comparing, and measuring prompt performance. ## References - [metrics.md](references/metrics.md) - Load when: defining or scoring Quality/Efficiency/Robustness/UX metrics with thresholds and calculation formulas …
Read the whole file at its exact version.
How to install
mdr add fusengine/agents/prompt-testing@git:20260729.3b91eedmdr add fusengine/agents/prompt-testing@sha256:b5a7158e738b3befPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_x2th6gxl7syz55ae)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3b91eed latest | 2026-07-29 | 3b91eed | 4,121 B | A | view · diff |
| git:20260705.ba8ee52 | 2026-07-05 | ba8ee52 | 3,348 B | A | view · diff |
| git:20260705.8c2f9bc | 2026-07-05 | 8c2f9bc | 3,346 B | A | view · diff |
| git:20260124.acdc941 | 2026-01-24 | acdc941 | 4,478 B | A | view · diff |
| git:20260122.f6bc08c | 2026-01-22 | f6bc08c | 4,445 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4121 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
fusengine/agents · 28 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_x2th6gxl7syz55ae GET https://markdownregistry.com/api/v1/resolve?ref=fusengine/agents/prompt-testing GET https://markdownregistry.com/api/v1/blob/b5a7158e738b3bef603d91a96f4cd10127351c99d391ff3a911251c10111f461
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