What is changing-prds?

A workflow for changing a system whose repository contains a docs/prd folder. It updates the product requirements document (PRD) when the system's behaviour changes.

It supports feature changes, rule or status-code changes, behaviour-changing bug fixes, removed requirements, and changes started by /prd-change.

It prevents code and its documented requirements from drifting apart, including when the existing requirements do not cover the requested change.

changing-prds — Skill for Claude Code by ihistand/claude-plugins

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add ihistand/claude-plugins

Claude Code

/plugin install prd-toolkit

Made for: Claude Code.

Or install prd-toolkit, the plugin that ships this one along with the rest of its 9 skills, 10 commands, 2 agents, 1 hook.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ihistand/claude-plugins/changing-prds/github.svg)](https://agentmods.dev/skills/ihistand/claude-plugins/changing-prds)

Your own site

<a href="https://agentmods.dev/skills/ihistand/claude-plugins/changing-prds"><img src="https://agentmods.dev/badge/skills/ihistand/claude-plugins/changing-prds/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ihistand/claude-plugins/changing-prds"><img src="https://agentmods.dev/badge/skills/ihistand/claude-plugins/changing-prds.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 10,199 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.10199
Opus 5.5	$0.00000	$0.04080
Sonnet 5.5	$0.00000	$0.02040
Haiku 4.5	$0.00000	$0.01020

Measured today against content hash 9a4385ec615d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

changing-prds scanned grade A with 1 finding 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 today.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

only answer. No `curl` or script posts to the inbox, and no browser tool clicks in it.

prd-toolkit/skills/changing-prds/SKILL.md · 472 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

reviewing-a-change.md 7.4 KB

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.

today Changed · +2 lines 9a4385ec615d
2d ago Changed · +69 lines 9feb63267f0b
3d ago Changed · +113 lines 8fbe3ea927f6
5d ago Changed · +31 lines · -95 tokens per session 15114647fb24
6d ago Changed · +51 lines c1da47ebbd5c
7d ago Changed · +15 lines 93523410a574
8d ago Changed · +21 lines 5f0e5529cebe
9d ago First seen · 170 lines · 95 tokens per session scan A 6ae4085a0524

Subscribe to this mod's changes

changing-prds is a skill published in the GitHub repository ihistand/claude-plugins (2 stars, last pushed today), with no licence file. It costs nothing until one of its globs matches a file; then it loads 10,199 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-31.

Planning

changing-prds next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
changing-prdsihistand/claude-plugins	Skill	2	today	none	A	0	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	2d ago	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	100k	2d ago	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
systematic-debuggingobra/superpowers	Skill	315k	5d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code

changing-prds

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Makes network callslowCapability

The source is not reproduced here

No licence file

What ships with it

What this file has done since we first saw it

changing-prds compared with skills from other repositories