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 OrcaQubits/agentic-commerce-skills-plugins --skill a2a-testinggit clone --depth 1 https://github.com/OrcaQubits/agentic-commerce-skills-pluginsWrote 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/orcaqubits/agentic-commerce-skills-plugins/a2a-testing)<a href="https://agentmods.dev/skills/orcaqubits/agentic-commerce-skills-plugins/a2a-testing"><img src="https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/a2a-testing/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/orcaqubits/agentic-commerce-skills-plugins/a2a-testing"><img src="https://agentmods.dev/badge/skills/orcaqubits/agentic-commerce-skills-plugins/a2a-testing.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 | $0.00050 | $0.00873 |
| Opus 5.5 | $0.00020 | $0.00349 |
| Sonnet 5.5 | $0.00010 | $0.00175 |
| Haiku 4.5 | $0.00005 | $0.00087 |
Grade A, and why
a2a-testing 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.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
A2A Testing
Before writing code
Fetch live docs:
- Fetch
https://a2a-protocol.org/latest/specification/for protocol requirements to test against - Web-search
site:github.com a2aproject A2A testing conformancefor testing tools and guidance - Web-search
site:github.com a2aproject a2a-samples testfor test examples - Fetch SDK docs for test utilities, mock classes, and test helpers
Conceptual Architecture
Testing Levels
A2A implementations need testing at multiple levels:
1. Unit Tests
Test individual components in isolation:
- Agent handler logic (given input message, verify output)
- Task state management (verify state transitions)
- Message/Part construction and parsing
- Agent Card validation
- Error code generation
2. Integration Tests
Test the A2A server with a real HTTP stack:
- Send JSON-RPC requests, verify responses
- Test all supported methods (message/send, tasks/get, etc.)
- Verify Agent Card serving at
/.well-known/agent-card.json - Test authentication flows
- Test streaming with SSE client
3. Protocol Conformance Tests
Verify compliance with the A2A specification:
- All required methods are implemented
- Request/response schemas match the spec
- Error codes are correct
- State transitions follow the rules
- Agent Card schema is valid
4. End-to-End Tests
Test full multi-agent workflows:
- Client discovers agent via Agent Card
- Client sends task, agent processes, client receives result
- Multi-turn conversations complete successfully
- Error scenarios are handled gracefully
- Multiple agents collaborate on a complex task
Mock Agents
For testing clients, create mock A2A servers that:
- Return predefined responses
- Simulate different task states
- Simulate errors and failures
- Simulate slow responses and timeouts
- Support streaming with controlled events
For testing servers, create mock A2A clients that:
- Send various message types and parts
- Exercise multi-turn flows
- Send invalid requests to test error handling
- Simulate disconnections during streaming
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 · 114 lines · 50 tokens per session scan A 6f4a4164443e
a2a-testing is a skill published in the GitHub repository OrcaQubits/agentic-commerce-skills-plugins (39 stars, last pushed 1mo ago), licensed MIT. It adds 50 tokens to every session and 873 once invoked, about $0.0002 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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