What is hello-subagent?

A set of instructions for using sub-agents, which are separate AI workers assigned specific tasks. It helps define their context and how their work should be checked.

Use it to delegate coding tasks, coordinate parallel development, and set clear checks for completed work.

It reduces confusion when splitting a large task among several AI workers or running development work in parallel.

hello-subagent — Skill by hellowind777

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 skills/hellowind777/helloagents/hello-subagent

Any agent

npx skills add hellowind777/helloagents --skill hello-subagent

Clone the repo

git clone --depth 1 https://github.com/hellowind777/helloagents

Made for: Claude Code, Codex.

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 665 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00033	$0.00665
Opus 5	$0.00016	$0.00332
Sonnet 5	$0.00007	$0.00133
Haiku 4.5	$0.00003	$0.00067

Measured 2d ago against content hash 28f2e2cbaf99, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

hello-subagent 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 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.

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.

skills/hello-subagent/SKILL.md · 35 lines

The source is not reproduced here

No licence file

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.

2d ago First seen · 35 lines · 33 tokens per session scan A 28f2e2cbaf99

Subscribe to this mod's changes

hello-subagent is a skill published in the GitHub repository hellowind777/helloagents (702 stars, last pushed 19d ago), with no licence file. It adds 33 tokens to every session and 665 once invoked, about $0.0002 per session on Opus 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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