background-prompt

background-prompt is a skill for Claude Code, Codex from X-School-Academy/skill-pilot. It costs 44 tokens per session (462 once invoked), scanned A, original, MIT.

A background prompt skill runs one prompt through the local Agent command-line tool while the task runs in the background, then returns plain text.

In plain words
What is it for?
It is for running background prompts through the configured language-model provider and collecting their text output.
Why use it?
It lets a user start a suitable single-prompt job without waiting for it to finish in the foreground.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for running background prompts through the configured language-model provider and collecting their text output.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/x-school-academy/skill-pilot/background-prompt
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 X-School-Academy/skill-pilot --skill background-prompt
Clone the repo
git clone --depth 1 https://github.com/X-School-Academy/skill-pilot

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 background-prompt

README.md
[![agentmods](https://agentmods.dev/badge/skills/x-school-academy/skill-pilot/background-prompt/github.svg)](https://agentmods.dev/skills/x-school-academy/skill-pilot/background-prompt)
Your own site
<a href="https://agentmods.dev/skills/x-school-academy/skill-pilot/background-prompt"><img src="https://agentmods.dev/badge/skills/x-school-academy/skill-pilot/background-prompt/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 background-prompt

Your own site · 80×15
<a href="https://agentmods.dev/skills/x-school-academy/skill-pilot/background-prompt"><img src="https://agentmods.dev/badge/skills/x-school-academy/skill-pilot/background-prompt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 462 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 $0.00044 $0.00462
Opus 5.5 $0.00018 $0.00185
Sonnet 5.5 $0.00009 $0.00092
Haiku 4.5 $0.00004 $0.00046

Measured 16d ago against content hash ff8f060f22e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

background-prompt 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 16d 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.

core/skills/system/background-prompt/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Background Prompt

Run a prompt as a background task through the local core/bin/agent-cli tool.

When to Use This Skill

  • User wants to execute a prompt in the background
  • User wants a prompt executed by the default core engine LLM provider
  • The task is suitable for single-prompt inference with plain text output

Your Roles in This Skill

  • Backend Developer (Engineer): Execute the tool command and capture output safely
  • Technical Writer: Convert tool output into a clear user-facing response
  • Security Engineer: Ensure prompt execution follows configured security flags

Role Communication

As an expert in your assigned roles, you must announce your actions before performing them using the following format:

As a {Role, and Role-XYZ if have more roles}, I will {action description}

This communication pattern ensures transparency and allows for human-in-the-loop oversight at key decision points.

Instructions

Follow these steps in order:

Step 1: Confirm intent

Ensure the user wants to run a background prompt. If not explicit, ask for confirmation before invoking.

Step 2: Build the prompt

Compose one concise prompt string from user instructions. Keep task scope explicit and include required output format details.

Step 3: Execute Agent CLI

Run from repository root:

core/bin/agent-cli "<prompt>"

Optional overrides only if user requests:

core/bin/agent-cli --provider <provider-id> --sandbox --auto --network "<prompt>"

Step 4: Return plain text result

Return the command output as plain text to the user. If command fails, include the error text and a concrete retry suggestion.

Expected Output

  • A plain text response generated by core/bin/agent-cli
  • Any execution error surfaced clearly when failures occur

Key Principles

  • Use core/bin/agent-cli as the primary execution path
  • Keep prompts specific and deterministic
  • Respect configured security defaults unless user requests overrides

Read the full file on GitHub · 70 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. 16d ago First seen · 70 lines · 44 tokens per session scan A ff8f060f22e0

Subscribe to this mod's changes

background-prompt is a skill published in the GitHub repository X-School-Academy/skill-pilot (20 stars, last pushed 4mo ago), licensed MIT. It adds 44 tokens to every session and 462 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-02.

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