crestapps-core-file-sources

crestapps-core-file-sources is a skill for Claude Code from CrestApps/CrestApps.AgentSkills. It costs 178 tokens per session (2,696 once invoked), scanned A, original, MIT.

A file intake system that keeps an AI data source updated from a local folder, FTP server, or SFTP server. FTP and SFTP are ways to transfer files between systems, with SFTP adding encrypted transfer.

In plain words
What is it for?
Use it to feed files into a knowledge base from folders or file-transfer servers and retrieve documents, articles, text, figures, charts, and tables.
Why use it?
It removes the need to upload files manually whenever source content changes. Each file is indexed as separately retrievable content, with links and page information for documents and their parts.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the crestapps-core plugin — 47 skills shipped together

Good fit Use it to feed files into a knowledge base from folders or file-transfer servers and retrieve documents, articles, text, figures, charts, and tables.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/crestapps/crestapps.agentskills/crestapps-core-file-sources
Install

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.

Any agent
npx skills add CrestApps/CrestApps.AgentSkills --skill crestapps-core-file-sources
Clone the repo
git clone --depth 1 https://github.com/CrestApps/CrestApps.AgentSkills

Made for: Claude Code.

Or install crestapps-core, the plugin that ships this one along with the rest of its 47 skills.

Wrote 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.

agentmods badge for crestapps-core-file-sources

README.md
[![agentmods](https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources/github.svg)](https://agentmods.dev/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources)
Your own site
<a href="https://agentmods.dev/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources/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.

agentmods 80×15 button for crestapps-core-file-sources

Your own site · 80×15
<a href="https://agentmods.dev/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources"><img src="https://agentmods.dev/badge/skills/crestapps/crestapps.agentskills/crestapps-core-file-sources.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 178 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,696 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00178 $0.02696
Opus 5.5 $0.00071 $0.01078
Sonnet 5.5 $0.00036 $0.00539
Haiku 4.5 $0.00018 $0.00270

Measured yesterday against content hash 07288b98e4b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

crestapps-core-file-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 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.

plugins/crestapps-core/skills/crestapps-core-file-sources/SKILL.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CrestApps.Core File Sources

A File AI data source (AIDataSourceSourceTypes.File) is an inert bucket with no folder, credential or field mapping. A file source (FileSource record) picks a connector, configures it, and points at the File data source it fills. Several file sources can feed one knowledge base, each on its own schedule. Web crawlers (crestapps-core-web-crawlers) are the same shape for websites.

FileSource (FileSystem) -+
FileSource (Ftp)        -+->  File AI data source  ->  knowledge-base index (typed objects)
FileSource (Sftp)       -+

Each file becomes separately retrievable objects (document, article, text, figure, chart, table) with a page number and a link to its article and document. Data source concepts are in crestapps-core-data-sources; readers and figure processing are in crestapps-core-document-processing.

Registration

using CrestApps.Core.AI.Documents;
using CrestApps.Core.AI.Documents.Endpoints;
using CrestApps.Core.AI.FileSources;
using CrestApps.Core.AI.Ftp;
using CrestApps.Core.AI.Sftp;
using CrestApps.Core.Data.YesSql;

builder.Services.AddCrestAppsCore(crestApps => crestApps
    .AddAISuite(ai => ai
        .AddOpenAI()
        .AddDocumentProcessing(documentProcessing => documentProcessing   // optional: chat uploads, Office readers
            .AddYesSqlStores()
            .AddPdf()
            .AddReferenceDownloads()))
    .AddIndexingServices(indexing => indexing
        .AddYesSqlStores()
        .AddPostgreSQL(
            builder.Configuration.GetSection("CrestApps:PostgreSQL"),
            postgreSQL => postgreSQL.AddAIDataSources())));

// After AddDocumentProcessing, so the HTML reader registered here wins .html.
builder.Services
    .AddCoreFileSources(builder.Configuration)
    .AddCoreFileSystemConnector()
    .AddCoreFtpIngestionConnector()    // CrestApps.Core.AI.Ftp (FluentFTP)
    .AddCoreSftpIngestionConnector();  // CrestApps.Core.AI.Sftp (SSH.NET)

builder.Services.AddCoreFileSourceStoresYesSql(); // or AddCoreFileSourceStoresEntityCore()

var app = builder.Build();

app.AddDownloadKnowledgeFigureEndpoint();

Read the full file on GitHub · 173 lines

Files

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.

Changes

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.

  1. yesterday First seen · 173 lines · 178 tokens per session scan A 07288b98e4b9

Subscribe to this mod's changes

crestapps-core-file-sources is a skill published in the GitHub repository CrestApps/CrestApps.AgentSkills (13 stars, last pushed yesterday), licensed MIT. It adds 178 tokens to every session and 2,696 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 2026-10-22.

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