file-handling

file-handling is a skill for Claude Code, Codex from PIXARTSeu/Synapse. It costs 58 tokens per session (3,356 once invoked), scanned A, original, no licence file.

A guide to uploading, storing, generating, importing, exporting, and streaming files in web applications.

In plain words
What is it for?
Use it for S3, R2, or Vercel Blob storage, PDF generation, CSV and Excel processing, file streaming, and presigned download links.
Why use it?
It helps manage files reliably, including large uploads and downloads through cloud storage.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it for S3, R2, or Vercel Blob storage, PDF generation, CSV and Excel processing, file streaming, and presigned download links.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/pixartseu/synapse/file-handling
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 PIXARTSeu/Synapse --skill file-handling
Clone the repo
git clone --depth 1 https://github.com/PIXARTSeu/Synapse

Made for: Claude Code, Codex.

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 file-handling

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/pixartseu/synapse/file-handling"><img src="https://agentmods.dev/badge/skills/pixartseu/synapse/file-handling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,356 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00058 $0.03356
Opus 5.5 $0.00023 $0.01342
Sonnet 5.5 $0.00012 $0.00671
Haiku 4.5 $0.00006 $0.00336

Measured 1mo ago against content hash 5f0430f6ec8f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

file-handling scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

await fetch(url, { method: 'PUT', body: file, headers: { 'Content-Type': file.type } })
packages/codegraph/data/skill/file-handling/SKILL.md · 437 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 1mo ago First seen · 437 lines · 58 tokens per session scan A 5f0430f6ec8f

Subscribe to this mod's changes

file-handling is a skill published in the GitHub repository PIXARTSeu/Synapse (11 stars, last pushed 1mo ago), with no licence file. It adds 58 tokens to every session and 3,356 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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