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 CrestApps/CrestApps.AgentSkills --skill orchardcore-ai-a2a-clientgit clone --depth 1 https://github.com/CrestApps/CrestApps.AgentSkillsWrote 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/crestapps/crestapps.agentskills/orchardcore-ai-a2a-client)<a href="https://agentmods.dev/skills/crestapps/crestapps.agentskills/orchardcore-ai-a2a-client"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/orchardcore-ai-a2a-client/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/crestapps/crestapps.agentskills/orchardcore-ai-a2a-client"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/orchardcore-ai-a2a-client.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 | $0.00214 | $0.01174 |
| Opus 5 | $0.00107 | $0.00587 |
| Sonnet 5 | $0.00043 | $0.00235 |
| Haiku 4.5 | $0.00021 | $0.00117 |
Grade A, and why
orchardcore-ai-a2a-client 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 9d 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 — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Orchard Core A2A Client - Prompt Templates
Configure an A2A Client
You are an Orchard Core expert. Generate configuration and admin guidance for connecting Orchard Core to remote A2A hosts through the CrestApps A2A Client feature.
Guidelines
- Use feature ID
CrestApps.OrchardCore.AI.A2A. - A2A client connections are managed under Artificial Intelligence → Agent to Agent Hosts.
- Each connection points to a remote A2A host whose agent card is discovered at
/.well-known/agent-card.json. - Remote agent cards are cached for 15 minutes per connection and invalidated when the connection changes.
- Connected remote agents become AI tools available to the model.
- Sensitive authentication values are encrypted at rest with ASP.NET Core Data Protection.
Feature Overview
| Feature | Feature ID | Description |
|---|---|---|
| A2A Client | CrestApps.OrchardCore.AI.A2A |
Connect to remote A2A hosts and use their agents |
Enable the A2A Client Feature
{
"steps": [
{
"name": "Feature",
"enable": [
"CrestApps.OrchardCore.AI",
"CrestApps.OrchardCore.AI.A2A"
],
"disable": []
}
]
}
Add a Connection via Admin UI
- Navigate to Artificial Intelligence → Agent to Agent Hosts.
- Click Add Connection.
- Enter:
- Display Text: A friendly name such as
Production Agent Hub. - Endpoint: The base A2A host URL, such as
https://agents.example.com. - Authentication: Choose the authentication method required by the remote host.
- Display Text: A friendly name such as
- Save the connection.
The system resolves the agent card automatically from /.well-known/agent-card.json on the configured host.
Supported Authentication Types
| Type | Description |
|---|---|
Anonymous |
No authentication |
ApiKey |
Sends an API key in a configurable header with an optional prefix |
Basic |
HTTP basic authentication with username and password |
OAuth2ClientCredentials |
OAuth 2.0 client credentials flow |
OAuth2PrivateKeyJwt |
OAuth 2.0 client credentials with private key JWT assertion |
OAuth2Mtls |
OAuth 2.0 client credentials with mutual TLS |
CustomHeaders |
Arbitrary HTTP headers defined as JSON |
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.
- 9d ago First seen · 123 lines · 214 tokens per session scan A 7366cfbc8f46
orchardcore-ai-a2a-client is a skill published in the GitHub repository CrestApps/CrestApps.AgentSkills (13 stars, last pushed 12d ago), licensed MIT. It adds 214 tokens to every session and 1,174 once invoked, about $0.0011 per session on Opus 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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