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.
/plugin marketplace add corezoid/simulator-ai-plugin/plugin install simulatorWrote 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.
[](https://agentmods.dev/skills/corezoid/simulator-ai-plugin/simulator-attachments)<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.
<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>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.
| Model | Per session | Once 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 |
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.
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 toolsuploadActorPicture/uploadActorPictureBulkfor 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 itsattachments:[{attachId}].simulator-actors—uploadActorPicturesets an actor's avatar (an engine tool, not here).
The flow: upload → attachId → link
- Upload the bytes → get the attachment record (
attachId, storedfileName). - Link the
attachIdto an actor/reaction (or pass it in a reaction'sattachments). - 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 — useuploadActorPicturefor actor images, oruploadBase64for everything else.
Link / unlink files
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
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.
- 1mo ago First seen · 104 lines · 145 tokens per session scan A 9c3c6231d76d
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.
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