backnotprop/pstack · skills/principle-type-system-discipline/SKILL.md

principle-type-system-discipline skillA

principle-type-system-discipline is agent-read markdown (skill) from backnotprop/pstack: Apply when designing types, reviewing a function signature, or writing code in any statically-typed language. Make illegal states unrepresentable, brand semantic primitives, parse external data at boundaries, refuse to lie to the compiler, exhaust variants, derive from authoritative schemas..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add backnotprop/pstack/principle-type-system-discipline@git:20260914.55bfdc2
Exact content
mdr add backnotprop/pstack/principle-type-system-discipline@sha256:c83da8031ffb4c86

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_5pr5nlvrhvgi3omw.svg)](https://markdownregistry.com/a/art_5pr5nlvrhvgi3omw)

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Versions

versioncommittedcommitsizeaudit
git:20260914.55bfdc2 latest2026-09-14 55bfdc2 4,922 BA view · diff
git:20260819.4b32d9d2026-08-19 4b32d9d 5,097 BA view · diff
git:20260527.b3eabf12026-05-27 b3eabf1 3,817 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4922 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

backnotprop/pstack · 309 stars · license MIT · pushed 2026-09-14 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_5pr5nlvrhvgi3omw
GET https://markdownregistry.com/api/v1/resolve?ref=backnotprop/pstack/principle-type-system-discipline
GET https://markdownregistry.com/api/v1/blob/c83da8031ffb4c86410030d3e261f659598fca2b7d8158fd9dc269d70a3a025e