human-first

human-first is a skill for Claude Code, Codex from bearded-illirian/trailmark. It costs 72 tokens per session (903 once invoked), scanned A, original, MIT.

A plain-language explanation guide for translating the agent’s previous message into simpler words, concrete examples, and analogies. It removes technical terms where possible.

In plain words
What is it for?
Use it after a confusing reply when you want a simpler explanation of what the agent meant.
Why use it?
It helps when an agent’s answer is difficult to understand or uses unfamiliar technical language. It focuses on the main ideas instead of repeating every detail.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it after a confusing reply when you want a simpler explanation of what the agent meant.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bearded-illirian/trailmark/human-first
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 bearded-illirian/trailmark --skill human-first
Clone the repo
git clone --depth 1 https://github.com/bearded-illirian/trailmark

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-first

README.md
[![agentmods](https://agentmods.dev/badge/skills/bearded-illirian/trailmark/human-first.svg)](https://agentmods.dev/skills/bearded-illirian/trailmark/human-first)
Your own site
<a href="https://agentmods.dev/skills/bearded-illirian/trailmark/human-first"><img src="https://agentmods.dev/badge/skills/bearded-illirian/trailmark/human-first.svg" alt="Measured on agentmods" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 903 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00072 $0.00903
Opus 5 $0.00036 $0.00451
Sonnet 5 $0.00014 $0.00181
Haiku 4.5 $0.00007 $0.00090

Measured 3d ago against content hash f17e13c2c540, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

human-first 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 3d 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.

adapters/codex/.agents/skills/human-first/SKILL.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Human-First Protocol

Explains the agent's last message in plain language with examples.

Input

The agent's most recent chat message that the user found unclear or too technical.

Output

A simplified explanation of that message in plain language with concrete examples and analogies, printed to chat.

Hands off to

— (terminal).


Step 1 — Find the last message

Take the agent's message that stands immediately before the /human-first command in the current conversation.

If no such message exists:

No previous message found to explain.
Type /human-first right after my reply.

End execution.


Step 2 — Extract key ideas

Extract 1-3 main ideas — what the agent was trying to say in essence. Don't retell structure or details — only the point.

Short message with one thought → explain the one. Long message → pick the most important, drop the rest.


Step 3 — Explain each idea

For each idea — three elements:

What it is — one sentence, no technical terms. If a term is unavoidable — explain it in parentheses in one word.

Why it's needed — one sentence. Which problem it solves, what would be missing without it.

For example — a concrete example from real life, not from code. Start with "Imagine that..." or "For example, like..."

Explanation rules

  • Speak like to a friend, not like documentation
  • Short sentences — max 15-20 words
  • If original had 5 items → explain 2-3 most important, not all
  • Don't add new information that wasn't in the original
  • Don't make the explanation longer than the original

Step 4 — Output the explanation

Output format:

In plain language:

**{Idea 1 — short name}**
What: {one sentence}
Why: {one sentence}
For example: {life analogy}

**{Idea 2}** (if any)
...

If something else is unclear — ask specifically.

The last line — always. Invites clarification without extra pressure.


Anti-patterns

❌ Retell technically — only in different words

Original: "add an index on the column to speed up queries". Bad: "create an index so SELECT works faster". Good: "make a book index — so the database doesn't flip through all records, but opens the right page immediately".

Read the full file on GitHub · 142 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago Changed f17e13c2c540
  2. 8d ago First seen · 142 lines · 72 tokens per session scan A d9bb1eca4c87

Subscribe to this mod's changes

human-first is a skill published in the GitHub repository bearded-illirian/trailmark (19 stars, last pushed 5d ago), licensed MIT. It adds 72 tokens to every session and 903 once invoked, about $0.0004 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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