simulator-attachments

simulator-attachments is a skill for Claude Code from corezoid/simulator-ai-plugin. It costs 145 tokens per session (1,154 once invoked), scanned A, original, MIT.

A file and attachment guide for Simulator.Company, where uploaded files become records that can be linked to actors or comments.

In plain words
What is it for?
Uploading documents and images, attaching them to records or comments, listing workspace files, renaming files, removing links, and managing actor pictures.
Why use it?
It separates uploading a file from attaching it, making it clear how to reuse, rename, list, or unlink files later.

Skill for Claude Code

Written for Claude Code: $CLAUDE_PLUGIN_ROOT variable.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the simulator plugin — 21 skills, 1 MCP server shipped together

Good fit Uploading documents and images, attaching them to records or comments, listing workspace files, renaming files, removing links, and managing actor pictures.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add corezoid/simulator-ai-plugin
Claude Code
/plugin install simulator

Made for: Claude Code.

Or install simulator, the plugin that ships this one along with the rest of its 21 skills, 1 MCP server.

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 simulator-attachments

README.md
[![agentmods](https://agentmods.dev/badge/skills/corezoid/simulator-ai-plugin/simulator-attachments/github.svg)](https://agentmods.dev/skills/corezoid/simulator-ai-plugin/simulator-attachments)
Your own site
<a href="https://agentmods.dev/skills/corezoid/simulator-ai-plugin/simulator-attachments"><img src="https://agentmods.dev/badge/skills/corezoid/simulator-ai-plugin/simulator-attachments/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 simulator-attachments

Your own site · 80×15
<a href="https://agentmods.dev/skills/corezoid/simulator-ai-plugin/simulator-attachments"><img src="https://agentmods.dev/badge/skills/corezoid/simulator-ai-plugin/simulator-attachments.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 145 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,154 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 $0.00145 $0.01154
Opus 5.5 $0.00058 $0.00462
Sonnet 5.5 $0.00029 $0.00231
Haiku 4.5 $0.00015 $0.00115

Measured 1mo ago against content hash 9c3c6231d76d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

simulator-attachments 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 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.

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/simulator/skills/simulator-attachments/SKILL.md · 104 lines

How it starts

The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Curated tool names (v2 server): uploadBase64, getAttachments, getActorAttachments, addAttachments, updateAttachment, removeAttachments. Plus the engine tools uploadActorPicture / uploadActorPictureBulk for actor avatars. Call them by these exact names.

Simulator.Company Files & Attachments Specialist

A file is uploaded once into the workspace and becomes an attachment record (with an attachId). You then link that record to actors or reactions. Listing, renaming and unlinking operate on the record.

Relationship to the other skills

  • simulator-reactions — a comment can carry files via its attachments:[{attachId}].
  • simulator-actors — uploadActorPicture sets an actor's avatar (an engine tool, not here).
  1. Upload the bytes → get the attachment record (attachId, stored fileName).
  2. Link the attachId to an actor/reaction (or pass it in a reaction's attachments).
  3. Manage it later (rename, list, unlink).

Workspace context

uploadBase64, getAttachments, addAttachments, removeAttachments take an accId (workspace id) — it defaults to the configured workspace if omitted. updateAttachment is addressed by attachId only.


Upload a file

uploadBase64(
  accId="ws_xxx",                  # optional — defaults to the configured workspace
  file="<base64 string>",          # prefer RAW base64; a data:<mime>;base64, prefix is also stripped server-side
  originalName="report.pdf",       # sets the type + title
  ttl=0)                           # seconds; 0 = permanent
# → returns the attachment record incl. attachId + fileName

Prefer raw base64. A data: URI prefix is accepted and stripped server-side, but raw base64 is the safe default. Multipart uploads are not a curated tool — use uploadActorPicture for actor images, or uploadBase64 for everything else.

addAttachments(accId="ws_xxx", items=[
  { "attachId": 5521, "actorId": "<actor or reaction UUID>" }
])
removeAttachments(accId="ws_xxx", items=[
  { "attachId": 5521, "actorId": "<actor or reaction UUID>" }
])   # unlinks; does NOT delete the stored file

Read the full file on GitHub · 104 lines

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 · 104 lines · 145 tokens per session scan A 9c3c6231d76d

Subscribe to this mod's changes

simulator-attachments is a skill published in the GitHub repository corezoid/simulator-ai-plugin (60 stars, last pushed yesterday), licensed MIT. It adds 145 tokens to every session and 1,154 once invoked, about $0.0006 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 2026-08-30.