write-spec

A guided tool for turning a problem or rough feature idea into a structured feature specification or product requirements document. It helps define goals, boundaries, success measures, and conditions for acceptance.

In plain words
What is it for?
Use it to scope features, clarify user requests, set success metrics, define acceptance criteria, and split large work into phases.
Why use it?
It removes the guesswork from deciding what to build and how to tell whether it works. It also exposes missing context, constraints, and dependencies before implementation begins.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/platinoff/poolai/write-spec
Any agent
npx skills add platinoff/poolAI --skill write-spec
Clone the repo
git clone --depth 1 https://github.com/platinoff/poolAI

Made for: Claude Code, Codex.

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,732 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% copy Near-identical to another mod 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 $0.00060 $0.02732
Opus 5 $0.00030 $0.01366
Sonnet 5 $0.00012 $0.00546
Haiku 4.5 $0.00006 $0.00273

Measured 2d ago against content hash ca6670913878, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

write-spec 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 2d 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.

Origin

This is a copy

89% identical to feature-spec — 106 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/write-spec/SKILL.md · 251 lines

How it starts

The opening of the file, as written. The whole thing — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write Spec

If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md.

Write a feature specification or product requirements document (PRD).

Usage

/write-spec $ARGUMENTS

Workflow

1. Understand the Feature

Ask the user what they want to spec. Accept any of:

  • A feature name ("SSO support")
  • A problem statement ("Enterprise customers keep asking for centralized auth")
  • A user request ("Users want to export their data as CSV")
  • A vague idea ("We should do something about onboarding drop-off")

2. Gather Context

Ask the user for the following. Be conversational — do not dump all questions at once. Ask the most important ones first and fill in gaps as you go:

  • User problem: What problem does this solve? Who experiences it?
  • Target users: Which user segment(s) does this serve?
  • Success metrics: How will we know this worked?
  • Constraints: Technical constraints, timeline, regulatory requirements, dependencies
  • Prior art: Has this been attempted before? Are there existing solutions?

3. Pull Context from Connected Tools

If ~~project tracker is connected:

  • Search for related tickets, epics, or features
  • Pull in any existing requirements or acceptance criteria
  • Identify dependencies on other work items

If ~~knowledge base is connected:

  • Search for related research documents, prior specs, or design docs
  • Pull in relevant user research findings
  • Find related meeting notes or decision records

If ~~design is connected:

  • Pull related mockups, wireframes, or design explorations
  • Search for design system components relevant to the feature

If these tools are not connected, work entirely from what the user provides. Do not ask the user to connect tools — just proceed with available information.

4. Generate the PRD

Produce a structured PRD with these sections. See PRD Structure below for detailed guidance on what each section should contain.

Read the full file on GitHub · 251 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. 2d ago First seen · 251 lines · 60 tokens per session scan A ca6670913878

Subscribe to this mod's changes

write-spec is a skill published in the GitHub repository platinoff/poolAI (4 stars, last pushed 9d ago), licensed MIT. It adds 60 tokens to every session and 2,732 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to feature-spec, differing in 106 lines, and is treated as a copy.

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