human-to-agent

human-to-agent is a skill for Claude Code, Codex from Mark-Life/agent-skills. It costs 54 tokens per session (680 once invoked), scanned A, original, MIT.

A writing guide for creating instructions that another coding agent will follow in a later session or context window.

In plain words
What is it for?
Use it to write or improve skills, project guidance files, agent rules, and prompts that control future coding work.
Why use it?
It helps make agent behavior more predictable by turning vague advice into clear, positive, reusable rules and removing unnecessary wording.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Good fit Use it to write or improve skills, project guidance files, agent rules, and prompts that control future coding work.

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Install with agentmods
npx agentmods add skills/mark-life/agent-skills/human-to-agent
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 Mark-Life/agent-skills --skill human-to-agent
Clone the repo
git clone --depth 1 https://github.com/Mark-Life/agent-skills

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 human-to-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/mark-life/agent-skills/human-to-agent/github.svg)](https://agentmods.dev/skills/mark-life/agent-skills/human-to-agent)
Your own site
<a href="https://agentmods.dev/skills/mark-life/agent-skills/human-to-agent"><img src="https://agentmods.dev/badge/skills/mark-life/agent-skills/human-to-agent/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 human-to-agent

Your own site · 80×15
<a href="https://agentmods.dev/skills/mark-life/agent-skills/human-to-agent"><img src="https://agentmods.dev/badge/skills/mark-life/agent-skills/human-to-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 680 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 $0.00054 $0.00680
Opus 5 $0.00027 $0.00340
Sonnet 5 $0.00011 $0.00136
Haiku 4.5 $0.00005 $0.00068

Measured 10d ago against content hash 72d0fe0bb03d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

human-to-agent 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 10d 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/communication/human-to-agent/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Human → Agent

You are writing for a stochastic reader. Every instruction is a lever on how predictably it behaves. The aim is predictability — the agent taking the same process each run, not producing the same output. Each rule below buys some.

Prompt the positive

State the behaviour you want. Prohibition backfires: don't think of an elephant names the elephant and makes it more available, not less. Phrase the target so the banned behaviour is never spoken. Keep a "don't" only as a hard guardrail you cannot phrase positively, and even then pair it with what to do instead.

Leading words

A leading word is a compact concept the model already holds from pretraining — tracer bullet, fog of war, tight loop, receipts. One well-chosen word anchors a whole region of behaviour in a token, because it recruits priors the model already has. Repeat it and its meaning accretes; use the same word across your prompts, docs, and code so the agent links them and fires the right behaviour.

Reach for one wherever you have spelled a quality out three times: "fast, deterministic, low-overhead" is one idea restated — collapse it to tight.

Cut no-ops

A no-op is a line the model already obeys by default: it costs context and buys nothing. Test each sentence in isolation — does it change behaviour versus the default? "Be thorough", when the model is already thorough-ish, is a no-op; the fix is a stronger word (relentless), not more words. When a sentence fails, delete the whole sentence rather than trim it.

One source of truth

Keep each instruction in exactly one place. The same rule in two files (duplication) rots the moment one copy changes, and inflates the rule's apparent weight. When you change the behaviour, you want a one-place edit.

Say how "done" is checked

Give the agent a completion criterion it can check — done from not-done, observable. Where it matters, make it exhaustive: "every changed file accounted for", not "list the changes". A vague criterion invites the agent to stop early.

Read the full file on GitHub · 65 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. 10d ago First seen · 65 lines · 54 tokens per session scan A 72d0fe0bb03d

Subscribe to this mod's changes

human-to-agent is a skill published in the GitHub repository Mark-Life/agent-skills (2 stars, last pushed 25d ago), licensed MIT. It adds 54 tokens to every session and 680 once invoked, about $0.0003 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 2026-08-31.