prompt_engineer

prompt_engineer is an agent for Claude Code from josstei/maestro-orchestrate. It costs 98 tokens per session (205 once invoked), scanned A, original, Apache-2.0.

A specialist for designing and reviewing prompts and evaluation setups for large language models, software that generates or analyzes text.

In plain words
What is it for?
Use it to write prompts, structure examples, build evaluation datasets, improve retrieval for retrieval-augmented generation systems, and investigate output changes.
Why use it?
It helps make model instructions clearer and helps identify regressions in generated results or search quality.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to write prompts, structure examples, build evaluation datasets, improve retrieval for retrieval-augmented generation systems, and investigate output changes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/josstei/maestro-orchestrate/prompt_engineer
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.

Clone the repo
git clone --depth 1 https://github.com/josstei/maestro-orchestrate

Made for: Claude Code.

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 prompt_engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/josstei/maestro-orchestrate/prompt_engineer/github.svg)](https://agentmods.dev/agents/josstei/maestro-orchestrate/prompt_engineer)
Your own site
<a href="https://agentmods.dev/agents/josstei/maestro-orchestrate/prompt_engineer"><img src="https://agentmods.dev/badge/agents/josstei/maestro-orchestrate/prompt_engineer/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 prompt_engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/josstei/maestro-orchestrate/prompt_engineer"><img src="https://agentmods.dev/badge/agents/josstei/maestro-orchestrate/prompt_engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 98 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 205 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 $0.00098 $0.00205
Opus 5.5 $0.00039 $0.00082
Sonnet 5.5 $0.00020 $0.00041
Haiku 4.5 $0.00010 $0.00020

Measured yesterday against content hash 3aa726d1ea56, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prompt_engineer 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 yesterday.

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.

agents/prompt_engineer.md · 21 lines

What it actually says

Agent methodology loaded via MCP tool get_agent. Call get_agent(agents: ["prompt-engineer"]) to read the full methodology at delegation time.

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. yesterday Changed · -2 lines 3aa726d1ea56
  2. 1mo ago First seen · 23 lines · 98 tokens per session scan A 41937af899e3

Subscribe to this mod's changes

prompt_engineer is an agent published in the GitHub repository josstei/maestro-orchestrate (486 stars, last pushed yesterday), licensed Apache-2.0. It adds 98 tokens to every session and 205 once invoked, about $0.0004 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 2026-08-30.

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