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 agentmods add rules/vlad-ryzhkov/ai-context-engineering-for-qa/21-skill-api-tests-javagit clone --depth 1 https://github.com/vlad-ryzhkov/ai-context-engineering-for-qaWhat 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 | $0.00000 | $0.00162 |
| Opus 5 | $0.00000 | $0.00081 |
| Sonnet 5 | $0.00000 | $0.00032 |
| Haiku 4.5 | $0.00000 | $0.00016 |
Grade A, and why
21-skill-api-tests-java 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 yesterday.
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
SKILL: API TESTS (JAVA)
TRIGGER
User explicitly types /api-tests-java or asks to write executable API tests in Java.
EXECUTION INSTRUCTIONS
DO NOT guess the procedure and DO NOT output anything yet. To perform this skill, you MUST dynamically read the instructions using your file-reading capabilities.
- First, read the core agent context:
.claude/qa_agent.md - Second, read the specific skill protocol:
.claude/skills/api-tests-java/SKILL.md - Execute based STRICTLY on the logic and output format defined in those files.
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.
- yesterday First seen · 18 lines · 0 tokens per session scan A 70ae49f1cec0
21-skill-api-tests-java is a cursor rule published in the GitHub repository vlad-ryzhkov/ai-context-engineering-for-qa (6 stars, last pushed 25d ago), licensed Unlicense. It costs nothing until one of its globs matches a file; then it loads 162 tokens. 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 2026-08-31.
Other cursor rules, from other repositories
00-project-context
Cursor rule "00-project-context" from vlad-ryzhkov/AI-QA-workshop-feb19, covering project context bridge, core instruction and critical behavior.
01-qa-agent
QA AGENT PERSONA: Principles, Anti-patterns, workflows.
04-skill-api-tests
SKILL: Generate Ktor/JUnit API Tests (use for /api-tests).
09-skill-init-agent
SKILL: Generate QA Agent Persona qaagent.md (use for /init-agent).
10-skill-init-project
SKILL: Generate CLAUDE.md for QA Project (use for /init-project).
02-skill-spec-audit
SKILL: Requirement Analysis & QA Audit (use for /spec-audit).