Bkend Storage

Organization

ww-w-ai

bkend-storage

bkend.ai file storage — upload (presigned URL), download (CDN), visibility levels, buckets. Triggers: bkend file, bkend upload, bkend download, bkend storage, bkend presigned URL

Overview

Publisher	ww-w-ai
Repository	`bkit-claude-code`
Skill name	`bkend-storage`
Stars	601
Forks	154
Bundled files	Instructions only
License	Apache-2.0
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
Self-contained
Everything the model needs lives in the instructions — no extra files to sync.
Open source
Published by ww-w-ai on GitHub. Read the source before you install it.

Installation

Install the Bkend Storage AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/ww-w-ai/bkit-claude-code.git /tmp/bkit-claude-code
mkdir -p .claude/skills
cp -r /tmp/bkit-claude-code/skills/bkend-storage .claude/skills/bkend-storage

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Bkend Storage in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Bkend Storage on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Bkend Storage is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

bkend.ai Storage Guide

Upload Methods

Method	Use Case	Process
Single	Normal files	Presigned URL -> PUT upload -> Register metadata
Multiple	Multiple files	Repeat single upload
Multipart	Large files	Initialize -> Part URLs -> Complete

Presigned URL

Validity: 15 minutes
PUT method with file binary
Content-Type header required

File Visibility (4 levels)

Level	Access	URL Type
public	Anyone	CDN URL (no expiry)
private	Owner only	Presigned URL (1 hour)
protected	Authenticated users	Presigned URL (1 hour)
shared	Specified targets	Presigned URL (1 hour)

Size Limits

Category	Max Size
Images	10 MB
Videos	100 MB
Documents	20 MB

Storage Categories

images, documents, media, attachments

MCP Storage Workflow

bkend MCP does NOT have dedicated storage tools. Use this workflow:

Search docs: search_docs with query "file upload presigned url"
Get examples: search_docs with query "file upload code examples"
Generate code: AI generates REST API code for file operations

Searchable Storage Docs

Doc ID	Content
`7_code_examples_data`	CRUD + file upload code examples

REST Storage API

Method	Endpoint	Description
POST	/v1/files/presigned-url	Generate presigned URL
POST	/v1/files	Register metadata (complete upload)
GET	/v1/files	File list
GET	/v1/files/:fileId	File detail
PATCH	/v1/files/:fileId	Update metadata
DELETE	/v1/files/:fileId	Delete file
POST	/v1/files/:fileId/download-url	Generate download URL

Multipart Upload (Large Files)

Method	Endpoint	Description
POST	/v1/files/multipart/init	Initialize multipart upload
POST	/v1/files/multipart/presigned-url	Get part upload URL
POST	/v1/files/multipart/complete	Complete multipart upload
POST	/v1/files/multipart/abort	Abort multipart upload

Upload Flow (Single File)


1. POST /v1/files/presigned-url -> { url, fileId }
2. PUT {url} with file binary + Content-Type header
3. POST /v1/files with { fileId, filename, contentType, size, visibility }

Multipart Upload Flow (Large File)


1. POST /v1/files/multipart/init -> { uploadId }
2. POST /v1/files/multipart/presigned-url -> [{ partNumber, url }]
3. PUT each part URL with file chunk
4. POST /v1/files/multipart/complete -> { file }

Official Documentation (Live Reference)

For the latest storage documentation, use WebFetch:

Storage Overview: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/en/storage/01-overview.md
MCP Storage Guide: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/en/mcp/07-storage-tools.md
Full TOC: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/SUMMARY.md

Frequently asked questions

What does the Bkend Storage AI skill do?

bkend.ai file storage — upload (presigned URL), download (CDN), visibility levels, buckets. Triggers: bkend file, bkend upload, bkend download, bkend storage, bkend presigned URL

Why use Bkend Storage on TypingMind?

Because you install it once and use it with any model. Bkend Storage is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Bkend Storage in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/ww-w-ai/bkit-claude-code/tree/main/skills/bkend-storage. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Bkend Storage?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Bkend Storage?

As many as you like. As long as a model supports skills, you can use Bkend Storage with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Bkend Storage AI skill free?

Yes. It is published on GitHub by ww-w-ai under the Apache-2.0 license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

bkend.ai Storage Guide

Upload Methods

Presigned URL

File Visibility (4 levels)

Size Limits

Storage Categories

MCP Storage Workflow

Searchable Storage Docs

REST Storage API

Multipart Upload (Large Files)

Upload Flow (Single File)

Multipart Upload Flow (Large File)

Official Documentation (Live Reference)

Frequently asked questions

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