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.
npx skills add anhtester/antigravity-testing-kit --skill test_data_generatorgit clone --depth 1 https://github.com/anhtester/antigravity-testing-kitWrote 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/anhtester/antigravity-testing-kit/test_data_generator)<a href="https://agentmods.dev/skills/anhtester/antigravity-testing-kit/test_data_generator"><img src="https://agentmods.dev/badge/skills/anhtester/antigravity-testing-kit/test_data_generator/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/anhtester/antigravity-testing-kit/test_data_generator"><img src="https://agentmods.dev/badge/skills/anhtester/antigravity-testing-kit/test_data_generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00032 | $0.01511 |
| Opus 5.5 | $0.00013 | $0.00604 |
| Sonnet 5.5 | $0.00006 | $0.00302 |
| Haiku 4.5 | $0.00003 | $0.00151 |
Grade A, and why
Test Data Generator 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- Test Data Generator — 100% identical, 0 lines differ
- skills-test-data-generator — 94% identical, 12 lines differ
How it starts
The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Test Data Generator
Purpose: Generate reliable test data for automation tests.
When to Use
Use this skill when:
- Creating test data for new test cases
- Generating boundary and edge case data
- Setting up data-driven tests
- Creating API request payloads
Responsibilities
Generate test data for:
- Registration forms
- Login credentials
- Form submissions
- API payloads
- Search queries
- File uploads
Data Rules
All generated data must be:
- Unique — No duplication within test suite
- Deterministic — Same seed produces same data (when needed)
- Traceable — Can identify which test generated it
Unique Data Pattern
Recommended format:
<prefix>_<testName>_<timestamp>
Examples:
auto_register_20260402133000
test_login_1712024100
Common Data Types
auto_<testName>_<timestamp>@test.com
Example: [email protected]
Username
user_<testName>_<timestamp>
Example: user_login_20260402133000
Phone
Random 10-digit number starting with valid prefix
Example: 0912345678
Password
Mix of uppercase, lowercase, digits, special chars
Example: Test@12345
Data Categories
Positive Data (Happy Path)
- Valid format, within constraints
- All required fields filled
- Standard business values
Negative Data
- Missing required fields
- Invalid format (wrong email, short password)
- Invalid characters
- Already existing values (duplicate check)
Boundary Values
- Minimum length (e.g., 1 character)
- Maximum length (e.g., 255 characters)
- Min + 1, Max - 1
- Empty string vs null
- Zero, negative numbers
Edge Cases
- Unicode / special characters
- Very long strings
- SQL injection patterns (for security testing)
- HTML tags in text fields
- Leading/trailing whitespace
Constraints
Test data must:
- Respect field validation rules (from DOM inspection)
- Match input format (date format, phone format)
- Avoid duplication across test runs
- Not contain real PII (personal data)
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 · 249 lines · 32 tokens per session scan A 940829dc7c9d
Test Data Generator is a skill published in the GitHub repository anhtester/antigravity-testing-kit (145 stars, last pushed 2mo ago), licensed MIT. It adds 32 tokens to every session and 1,511 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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