agentos-chat

A command that sends a message to an AgentOS agent, a software agent managed by the AgentOS service.

In plain words
What is it for?
Use it to send a message to the default AgentOS agent and return its response.
Why use it?
It provides a direct way to pass instructions or questions to that agent from the command line.

Command

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.

agentmods
npx agentmods add commands/iii-experimental/agentos/agentos-chat
Clone the repo
git clone --depth 1 https://github.com/iii-experimental/agentos
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 78 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
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 $0.00012 $0.00078
Opus 5 $0.00006 $0.00039
Sonnet 5 $0.00002 $0.00016
Haiku 4.5 $0.00001 $0.00008

Measured 2d ago against content hash 89f0c4cc147e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

agentos-chat scanned grade B with 2 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 2d 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

curl -s -X POST http://localhost:3111/api/agents/default/message -H 'Content-Type: application/json' -d '{"agentId": "default", "message": "$ARGUMENTS"}' | jq .content

Makes network callslowCapability

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

curl -s -X POST http://localhost:3111/api/agents/default/message -H 'Content-Type: application/json' -d '{"agentId": "default", "message": "$ARGUMENTS"}' | jq .content
plugin/commands/agentos-chat.md · 10 lines

What it actually says

Send message to agent:

curl -s -X POST http://localhost:3111/api/agents/default/message -H 'Content-Type: application/json' -d '{"agentId": "default", "message": "$ARGUMENTS"}' | jq .content
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. 2d ago First seen · 10 lines · 12 tokens per session scan B 89f0c4cc147e

Subscribe to this mod's changes

agentos-chat is a command published in the GitHub repository iii-experimental/agentos (162 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 12 tokens to every session and 78 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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