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.
npx skills add ljucask/pureinn-product-development --skill pm-diagramsgit clone --depth 1 https://github.com/ljucask/pureinn-product-developmentWrote 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/skills/ljucask/pureinn-product-development/pm-diagrams)<a href="https://agentmods.dev/skills/ljucask/pureinn-product-development/pm-diagrams"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-diagrams/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/skills/ljucask/pureinn-product-development/pm-diagrams"><img src="https://agentmods.dev/badge/skills/ljucask/pureinn-product-development/pm-diagrams.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 | $0.00129 | $0.02826 |
| Opus 5 | $0.00064 | $0.01413 |
| Sonnet 5 | $0.00026 | $0.00565 |
| Haiku 4.5 | $0.00013 | $0.00283 |
Grade A, and why
pm-diagrams 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 11d 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 — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PM - Diagrams
Agent mode (--agent)
Supports --agent: runs autonomously in a subagent, drafts the diagram 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.
What this skill does
Generates visual diagrams. It is a rendering engine + composition knowledge utility: it owns how each diagram type is correctly composed, not the analysis behind it. The correct composition rules for every type live in references/[slug].md - the skill reads the relevant reference before drawing, so it never renders from memory.
Two rendering modes:
- Mermaid.js (primary, Claude Code workflow) - rendered inline in markdown, embedded in live registers and Feature Cards. Claude reads Mermaid natively. Use for anything that must be read as a specification.
- Excalidraw (secondary, human communication) - hand-drawn visual overviews for stakeholders. Use for high-level maps where the value is visual, not machine-readable.
The 18-type catalogue (slug → type)
| Slug | Type | Primary tool | Phase | Ownership |
|---|---|---|---|---|
| Domain / data | ||||
state |
Entity State Machine | Mermaid | 4 | pm-diagrams |
domain |
Domain Model Overview | Excalidraw | 4 | pm-diagrams |
erd |
ERD (crow's-foot) | Mermaid | 4 | pm-diagrams |
| Process / behavior | ||||
sequence |
Sequence Diagram | Mermaid | 6 JIT | pm-diagrams |
flow |
User Flow / Flowchart | Mermaid/Excalidraw | 2, 6 | pm-diagrams |
bpmn |
Business Process (BPMN 2.0) | Excalidraw | 2, FI | pm-diagrams |
journey |
Customer Journey Map | Excalidraw | 2 | pm-diagrams |
| UX / design | ||||
wireflow |
Wireflow / Screen Flow | Excalidraw | 6 | pm-diagrams |
| Architecture | ||||
architecture |
System Architecture | Excalidraw | 4, 6 | pm-diagrams |
c4 |
C4 (Context + Container) | Mermaid | 4 | pm-diagrams |
| Planning / delivery | ||||
dependency |
Dependency Graph | Mermaid | 5 | render for pm-features-list |
kanban |
Kanban Board (lifecycle) | Mermaid | 6, 7 | render for pm-stripe |
storymap |
User Story Map | Excalidraw | 5 | pm-diagrams |
gantt |
Gantt / Timeline Roadmap | Mermaid | 3b, 5, 6 | render for pm-product-roadmap (dated) / pm-stripe (relative) |
| Strategic | ||||
jtbd |
JTBD Four Forces | Excalidraw | 2 | pm-diagrams |
matrix |
2×2 Matrix (generic) | Excalidraw | various | pm-diagrams |
kano |
Kano Model | Excalidraw | 5 | render for pm-features-list |
swot |
SWOT | Excalidraw | 2 | render for pm-market-analysis |
What ships with it
18 files 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.
- references/architecture.md 4.0 KB
- references/bpmn.md 5.5 KB
- references/c4.md 4.6 KB
- references/dependency.md 5.8 KB
- references/domain.md 3.6 KB
- references/erd.md 4.0 KB
- references/flow.md 2.9 KB
- references/gantt.md 6.7 KB
- references/journey.md 4.4 KB
- references/jtbd.md 4.5 KB
- references/kanban.md 5.3 KB
- references/kano.md 4.3 KB
- references/matrix.md 3.7 KB
- references/sequence.md 4.0 KB
- references/state.md 4.2 KB
- references/storymap.md 3.9 KB
- references/swot.md 3.9 KB
- references/wireflow.md 3.4 KB
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.
- 11d ago First seen · 191 lines · 129 tokens per session scan A d20c162ad761
pm-diagrams is a skill published in the GitHub repository ljucask/pureinn-product-development (2 stars, last pushed yesterday), licensed MIT. It adds 129 tokens to every session and 2,826 once invoked, about $0.0006 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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