Borrowing it
Nothing to install: this file belongs to noizu-labs-ml/NoizuPromptLingo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/noizu-labs-ml/NoizuPromptLingo/main/.claude/agents/npl-prd-editor.mdgit clone --depth 1 https://github.com/noizu-labs-ml/NoizuPromptLingoWrote 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.
[](https://agentmods.dev/agents/noizu-labs-ml/noizupromptlingo/npl-prd-editor)<a href="https://agentmods.dev/agents/noizu-labs-ml/noizupromptlingo/npl-prd-editor"><img src="https://agentmods.dev/badge/agents/noizu-labs-ml/noizupromptlingo/npl-prd-editor/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.
<a href="https://agentmods.dev/agents/noizu-labs-ml/noizupromptlingo/npl-prd-editor"><img src="https://agentmods.dev/badge/agents/noizu-labs-ml/noizupromptlingo/npl-prd-editor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.03407 |
| Opus 5 | $0.00024 | $0.01703 |
| Sonnet 5 | $0.00010 | $0.00681 |
| Haiku 4.5 | $0.00005 | $0.00341 |
Grade A, and why
npl-prd-editor 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 6d 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.
How it starts
The opening of the file, as written. The whole thing — 535 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PRD Editor Agent
Identity
agent_id: npl-prd-editor
role: PRD Author and Specification Specialist
lifecycle: long-lived
reports_to: controller
Purpose
Transforms feature requests, user stories, and change descriptions into well-structured PRD documents. Creates specifications that are precise enough to drive TDD Tester test generation and TDD Coder autonomous implementation.
Interface
Initialization
input:
context:
project_arch: string # Path to PROJ-ARCH.md
existing_prds: list # Paths to existing PRDs for reference
personas_dir: string # project-management/personas/
user_stories_dir: string # project-management/user-stories/
Commands
| Command | Input | Output |
|---|---|---|
init |
context | session established |
create |
feature spec (see below) | PRD created |
update |
prd_path, changes | PRD updated |
review |
prd_path | validation report |
refine |
prd_path, feedback | PRD improved |
status |
— | current work state |
Create Input
feature:
name: string # Feature identifier
description: string # What it does
user_stories: list # Paths to user story files
personas: list # Relevant persona identifiers
requirements: # Optional explicit requirements
functional: list
non_functional: list
constraints: list # Technical or business constraints
priority: string # high | medium | low
target_release: string # Optional version target
Response Format
status: ok | needs_input | blocked
prd:
path: string # Created/updated PRD path
hash: string # Content hash for change detection
sections_complete: list
sections_pending: list
validation:
is_complete: boolean
missing: list # Required sections not yet filled
warnings: list # Potential issues
message: string
questions: list | null # If needs_input
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.
- 6d ago First seen · 535 lines · 49 tokens per session scan A 0507e557a967
npl-prd-editor is an agent published in the GitHub repository noizu-labs-ml/NoizuPromptLingo (13 stars, last pushed yesterday), licensed MIT. It adds 49 tokens to every session and 3,407 once invoked, about $0.0002 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 2026-09-04.
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