pm-business-rule-core

pm-business-rule-core is a skill for Claude Code from ljucask/pureinn-product-development. It costs 65 tokens per session (1,663 once invoked), scanned A, original, MIT.

A product-management helper that adds one important operational business rule to a business-rules document.

In plain words
What is it for?
Use it for rules about areas such as matching, pricing, service-level agreements, fulfillment, trust, or other domain logic.
Why use it?
It gives normal system behavior a recorded rule when the behavior may have exceptions or depend on context.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions subagents; names the AskUserQuestion tool.

Part of the pureinn-product-development plugin — 51 skills, 1 command shipped together

Good fit Use it for rules about areas such as matching, pricing, service-level agreements, fulfillment, trust, or other domain logic.

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Install with agentmods
npx agentmods add skills/ljucask/pureinn-product-development/pm-business-rule-core
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 ljucask/pureinn-product-development --skill pm-business-rule-core
Clone the repo
git clone --depth 1 https://github.com/ljucask/pureinn-product-development

Made for: Claude Code.

Or install pureinn-product-development, the plugin that ships this one along with the rest of its 51 skills, 1 command.

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 pm-business-rule-core

README.md
[![agentmods](https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-business-rule-core/github.svg)](https://agentmods.dev/skills/ljucask/pureinn-product-development/pm-business-rule-core)
Your own site
<a href="https://agentmods.dev/skills/ljucask/pureinn-product-development/pm-business-rule-core"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-business-rule-core/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 pm-business-rule-core

Your own site · 80×15
<a href="https://agentmods.dev/skills/ljucask/pureinn-product-development/pm-business-rule-core"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-business-rule-core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,663 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 $0.00065 $0.01663
Opus 5 $0.00032 $0.00831
Sonnet 5 $0.00013 $0.00333
Haiku 4.5 $0.00006 $0.00166

Measured 12d ago against content hash c07c6803778f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

pm-business-rule-core 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 12d 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.

skills/pm-business-rule-core/SKILL.md · 176 lines

How it starts

The opening of the file, as written. The whole thing — 176 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PM - Business Rule: Core Operational Rule (JIT Helper)

Agent mode (--agent)

Supports --agent: runs autonomously in a subagent, drafts the artifact from existing inputs, and returns a short summary + coverage note.

  • No flag → interactive (default); if inputs are heavy, offer agent mode.
  • --agent → obey. First check inputs are complete. Anything missing: do NOT invent it - mark [ASSUMED - what/why] in the output and summary. Never hallucinate to fill a gap.
  • Review required: the artifact contains commitments - after drafting, require the user's review before finalizing; do not close decisions autonomously.

What this skill does

Adds a single High or Medium priority operational rule to domain/business_rules.md.

A rule belongs here when:

  • It governs regular system behavior in a specific domain (matching, pricing, trust, fulfillment, SLA)
  • It CAN have exceptions or context-dependent variations (unlike Critical invariants)
  • Violating it degrades quality or fairness but does not cause immediate irreversible damage
  • It is referenced by feature designs when implementing the business logic

If the rule has NO exceptions and violation causes financial/legal harm → use pm-business-rule-critical. If it is a compliance, regulatory, or policy rule → use pm-business-rule-governance.

When to run: During pm-feature-design when the JIT design reveals business logic that should be centralized. Or standalone when operational rules need to be formalized before a feature enters build.


Dependencies

Required before running:

  • pm-business-rules-library - domain/business_rules.md must exist (initialized in Phase 4)
  • pm-entity-registry - entity context for scoping the rule

Produces artifacts used by:

  • pm-feature-design - JIT design reads BR-IDs when defining Feature Card Section 1 (Biznis Mantinely)
  • Build phase - developers implement the business logic

Step 0: Current state check

If domain/business_rules.md does not exist yet, do not attempt to create it here - tell the user to run /pm-business-rules-library first (it initializes the register), then return to this skill.

Read the full file on GitHub · 176 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. 12d ago First seen · 176 lines · 65 tokens per session scan A c07c6803778f

Subscribe to this mod's changes

pm-business-rule-core is a skill published in the GitHub repository ljucask/pureinn-product-development (2 stars, last pushed yesterday), licensed MIT. It adds 65 tokens to every session and 1,663 once invoked, about $0.0003 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 2026-08-31.

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