Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/CrestApps/CrestApps.AgentSkillsnpx agentmods add skills/crestapps/crestapps.agentskills/crestapps-core-sample-hostsWrote 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/crestapps-core-sample-hosts)<a href="https://agentmods.dev/skills/crestapps/crestapps.agentskills/crestapps-core-sample-hosts"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-sample-hosts/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/crestapps-core-sample-hosts"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-sample-hosts.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 | $0.00164 | $0.02152 |
| Opus 5.5 | $0.00066 | $0.00861 |
| Sonnet 5.5 | $0.00033 | $0.00430 |
| Haiku 4.5 | $0.00016 | $0.00215 |
Grade A, and why
crestapps-core-sample-hosts 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.
How it starts
The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CrestApps.Core Sample Hosts
You are a CrestApps.Core expert. Point developers at the right sample, then separate the framework calls they should copy from the sample plumbing they should replace.
Sample Project Map
| Project | Path | Composition | Best use |
|---|---|---|---|
| MVC reference host | src/Startup/CrestApps.Core.Mvc.Web |
Every feature on YesSql over SQLite (App_Data/crestapps.db) |
Broadest end-to-end reference |
| Blazor reference host | src/Startup/CrestApps.Core.Blazor.Web |
The same features on Entity Framework Core over SQLite (App_Data/crestapps-blazor.db) |
Blazor Server and EF Core reference |
| Aspire app host | src/Startup/CrestApps.Core.Aspire.AppHost |
Both web hosts plus Ollama, Redis, PostgreSQL with pgvector, and both protocol clients | Composed local environment |
| MCP sample client | src/Startup/CrestApps.Core.Mvc.Samples.McpClient |
Razor Pages client using the MCP SDK, with a server selector | Exercising a host's /mcp endpoint |
| A2A sample client | src/Startup/CrestApps.Core.Mvc.Samples.A2AClient |
Razor Pages client for agent cards and tasks, with a server selector | Exercising a host's A2A endpoints |
| Shared sample library | src/Startup/CrestApps.Core.Startup.Shared |
Site settings store, option bridges, sample authorization handlers, article demo | Patterns to copy, not to reference |
Both web hosts register OpenAI, Azure OpenAI, Ollama, Azure AI Inference, Claude and Copilot orchestrators, Chat Interactions, document processing with OpenXml, PDF, Word and reference downloads, AI memory, personas, tool instances, A2A client and host, MCP client and server (with FTP, SFTP and knowledge resources), SignalR, Elasticsearch, Azure AI Search and PostgreSQL search, web crawlers, and file sources with file-system, FTP and SFTP connectors.
Run the Samples
dotnet run --project ./src/Startup/CrestApps.Core.Mvc.Web/CrestApps.Core.Mvc.Web.csproj
dotnet run --project ./src/Startup/CrestApps.Core.Blazor.Web/CrestApps.Core.Blazor.Web.csproj
dotnet run --project ./src/Startup/CrestApps.Core.Aspire.AppHost/CrestApps.Core.Aspire.AppHost.csproj
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · +47 lines · +138 tokens per session 01fbf2455740
- 1mo ago First seen · 35 lines · 26 tokens per session scan A 067664805bfc
crestapps-core-sample-hosts is a skill published in the GitHub repository CrestApps/CrestApps.AgentSkills (13 stars, last pushed yesterday), licensed MIT. It adds 164 tokens to every session and 2,152 once invoked, about $0.0007 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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