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 skills/crestapps/crestapps.agentskills/crestapps-core-data-sourcesnpx skills add CrestApps/CrestApps.AgentSkills --skill crestapps-core-data-sourcesgit 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/crestapps-core-data-sources)<a href="https://agentmods.dev/skills/crestapps/crestapps.agentskills/crestapps-core-data-sources"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-data-sources.svg" alt="Measured on agentmods" 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 | $0.00027 | $0.00365 |
| Opus 5 | $0.00014 | $0.00182 |
| Sonnet 5 | $0.00005 | $0.00073 |
| Haiku 4.5 | $0.00003 | $0.00036 |
Grade A, and why
crestapps-core-data-sources 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 5d 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.
What it actually says
CrestApps.Core Data Sources - Prompt Templates
Add Search-Backed RAG
You are a CrestApps.Core expert. Generate code and guidance for index-backed data sources in CrestApps.Core.
Guidelines
- Use data sources when knowledge should come from durable search indexes instead of only attached documents.
- Pair data sources with the AI runtime and orchestration.
- Provide an indexing store through Entity Framework Core or YesSql when index profiles are persisted.
- Use Azure AI Search or Elasticsearch based on the chosen backend.
- Keep provider-specific search wiring behind the shared data-source abstractions.
Feature Goals
- semantic retrieval from durable indexes
- index profile selection
- preemptive RAG and retrieval tuning
- backend-specific registration without rewriting business logic
Common Composition Pattern
builder.Services.AddCrestAppsCore(crestApps => crestApps
.AddAISuite(ai => ai
.AddOpenAI()
.AddChatInteractions()
)
.AddIndexingServices(indexing => indexing
.AddEntityCoreStores()
.AddAzureAISearch(
builder.Configuration.GetSection("CrestApps:AzureAISearch"),
search => search
.AddAIDataSources())
)
);
Design Guidance
- Use documents for uploaded file workflows.
- Use data sources for durable business indexes.
- Combine data sources with AI Profiles when retrieval boundaries should be reusable.
- A metadata store alone does not provide a data-source backend. Register a real backend such as Azure AI Search, Elasticsearch, or PostgreSQL and call that backend's
AddAIDataSources()extension.
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.
- 5d ago First seen · 51 lines · 27 tokens per session scan A a708e418da47
crestapps-core-data-sources is a skill published in the GitHub repository CrestApps/CrestApps.AgentSkills (13 stars, last pushed 7d ago), licensed MIT. It adds 27 tokens to every session and 365 once invoked, about $0.0001 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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