web-files-file-upload-patterns SKILL.md skillA
web-files-file-upload-patterns from agents-inc/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add agents-inc/skills/web-files-file-upload-patterns@git:20260906.5c10830Pins git:20260906.5c10830 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- agents-inc/skills
- Path
src/skills/web-files-file-upload-patterns/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260906.5c10830, committed Sep 6, 2026
- First version recorded
- Feb 2, 2026
- Size
- 12,487 bytes
- Repository stars
- 26
- License
- MIT
File upload patterns - drag-drop dropzones, chunked and resumable uploads, presigned URL flows, file validation (MIME type, magic bytes), progress tracking, accessibility (ARIA).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# File Upload Patterns > **Quick Guide:** A dropzone is a keyboard-operable button wrapping a hidden file input, with drag > as an enhancement. Validate for the user's benefit on the client — extension, MIME type, then the > file's own magic bytes — and again on the server, because none of the client checks are security. > Progress needs `XMLHttpRequest`; `fetch` has no upload progress event. Past roughly 100MB, chunk > the file so a failure costs one chunk. Large files go straight to storage on a presigned URL the > server issues, so no request body is ever proxied. **Detailed Resources:** - [examples/core.md](examples/core.md) — file input, dropzone, file list state and rendering, the assembled component - [examples/validation.md](examples/validation.md) — rule-based validator, magic-byte detection, dimension checks, a validation hook - [examples/progress.md](examples/progress.md) — XHR progress with speed and ETA, progress bar, formatters, concurrent uploads - [examples/preview.md](examples/preview.md) — a preview thumbnail for a selected file, with cleanup …
Read the whole file at its exact version.
How to install
mdr add agents-inc/skills/web-files-file-upload-patterns@sha256:a6e4845afd6dd84cThe line at the top of this page pins the label git:20260906.5c10830, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_cwnn5dit3hww4n2o)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Feb 2, 2026 and Sep 6, 2026, about one every 72 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260906.5c10830 latest | 2026-09-06 | 5c10830 | 12,487 B | A | view · diff |
| git:20260328.03e71dd | 2026-03-28 | 03e71dd | 13,604 B | A | view · diff |
| git:20260316.00cb75b | 2026-03-16 | 00cb75b | 13,614 B | A | view · diff |
| git:20260202.b236384 | 2026-02-02 | b236384 | 24,122 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12487 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
agents-inc/skills · 26 stars · license MIT · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cwnn5dit3hww4n2o GET https://markdownregistry.com/api/v1/resolve?ref=agents-inc/skills/web-files-file-upload-patterns GET https://markdownregistry.com/api/v1/blob/a6e4845afd6dd84c73715a5f2c3a90f857de7e1da22ae4c2d8e61895284bbcb4
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.