task-brief

task-brief is a skill for Claude Code, Codex from moonlight-lupin/agent-skills. It costs 209 tokens per session (2,077 once invoked), scanned A, original, MIT.

A planning step that turns a vague request into a short task brief before substantial work begins. The brief records what success means, the known context, the limits to follow, and which tools will be used.

In plain words
What is it for?
It helps prepare multi-step tasks, document batches, reports, dashboards, and other deliverables where different interpretations could lead to different results.
Why use it?
It reduces mistakes caused by guessing the deliverable, audience, or rules. You can review the intended approach before time is spent doing the work.

Skill for Claude CodeCodex

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

Good fit It helps prepare multi-step tasks, document batches, reports, dashboards, and other deliverables where different interpretations could lead to different results.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/moonlight-lupin/agent-skills/task-brief
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 moonlight-lupin/agent-skills --skill task-brief
Clone the repo
git clone --depth 1 https://github.com/moonlight-lupin/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 task-brief

README.md
[![agentmods](https://agentmods.dev/badge/skills/moonlight-lupin/agent-skills/task-brief/github.svg)](https://agentmods.dev/skills/moonlight-lupin/agent-skills/task-brief)
Your own site
<a href="https://agentmods.dev/skills/moonlight-lupin/agent-skills/task-brief"><img src="https://agentmods.dev/badge/skills/moonlight-lupin/agent-skills/task-brief/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 task-brief

Your own site · 80×15
<a href="https://agentmods.dev/skills/moonlight-lupin/agent-skills/task-brief"><img src="https://agentmods.dev/badge/skills/moonlight-lupin/agent-skills/task-brief.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 209 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,077 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 warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 60
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Excessive Agency · line 68
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Excessive Agency · line 154
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 $0.00209 $0.02077
Opus 5 $0.00105 $0.01038
Sonnet 5 $0.00042 $0.00415
Haiku 4.5 $0.00021 $0.00208

Measured 9d ago against content hash dd618b04181d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

task-brief 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 9d 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.

productivity/task-brief/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Task Brief

Thin requests are the biggest cause of mediocre agent output: the agent guesses the deliverable, the audience and the guardrails, and the user only discovers the misreading after the work is done. This skill moves that discovery to the cheapest possible point — before the work starts — by having the agent compile a short task brief, show it, and only then execute. The user never has to write a better prompt; the agent does the structuring.

When to run it — and when not to

Run it when:

  • the user explicitly asks ("brief this first", "make sure you understand before starting"); or
  • the task is substantial — multi-step, multi-document, or a deliverable someone else will read (a memo, a report, a dashboard, a document batch) — and the request is thin or ambiguous enough that two reasonable readings would produce different work.

Skip it (just do the task) for quick factual questions, single-step edits, and requests already crisp enough to act on. A brief on a trivial ask is friction, not quality — proportionality is part of the skill. When in doubt, a one-line restatement of the goal ("I'll read this as X — say if not") beats a full brief.

The brief

Compile and show this exact shape — short, in plain business language:

**Task brief — [short task name]**
- **Goal** — what "done" looks like: the deliverable, its format, its audience,
  and the test it must pass.
- **Context** — everything known that bears on the task: the inputs/files
  provided, relevant background from the conversation or memory, the entities /
  period / parties involved, what already exists.
- **Constraints** — what to avoid and the guardrails: task-specific limits
  (scope, exclusions, deadline, tone) plus whichever standing rules materially
  bite this task (see below).
- **Assumptions** — anything filled in without asking, flagged so the user can
  correct it with one word.
- **Tooling** — the installed skill(s) or tool(s) that will do the work.

Read the full file on GitHub · 171 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. 9d ago First seen · 171 lines · 209 tokens per session scan A dd618b04181d

Subscribe to this mod's changes

task-brief is a skill published in the GitHub repository moonlight-lupin/agent-skills (57 stars, last pushed 2d ago), licensed MIT. It adds 209 tokens to every session and 2,077 once invoked, about $0.0010 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.