# Product Foundations

> The foundational concerns every product must decide — users & operators, observability, audit logs, change logs, background processes, data retention & PII, notifications, runtime settings, rate limiting, reliability targets, disaster recovery & backup, cost guardrails. Elicited defaults distilled from the 95octane reference implementation. Used by /vwf:architecture (the foundations checklist) and /vwf:blueprint (expanding accepted foundations into contracts); read the reference matching the foundation being decided or expanded.

## Facts
- Page: https://tashan.sh/capability/skill-virajp-product-foundations
- tashan id: skill:virajp/product-foundations
- Source: https://github.com/virajp/ai-plugins
- Type: skill
- Category: other
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 80.0
- Freshness: 96.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- License: MIT
- Official: no

## Install

```sh
cp -r product-foundations ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-20 by tashan (https://tashan.sh) from public evidence. Scorer s5.