michael-denyer/pstack-claude · plugins/pstack/skills/why/SKILL.md

why skillA

why is agent-read markdown (skill) from michael-denyer/pstack-claude: Use for 'why does X work this way', 'why we picked Y', design rationale, regressions, postmortems, or data-backed thresholds. Discovers available MCPs and queries each evidence category (source control, issue tracker, long-form docs, real-time chat, infrastructure observability, error tracking, product analytics warehouse) in parallel, then returns a cited read on decisions and tradeoffs. Use how for runtime behavior..

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 michael-denyer/pstack-claude/why@git:20260907.ebb8c27
Exact content
mdr add michael-denyer/pstack-claude/why@sha256:0691b6378ee2505b

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_6cpwwqdepd3hqn4s.svg)](https://markdownregistry.com/a/art_6cpwwqdepd3hqn4s)

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Versions

versioncommittedcommitsizeaudit
git:20260907.ebb8c27 latest2026-09-07 ebb8c27 10,459 BA view · diff
git:20260907.3df207b2026-09-07 3df207b 21,836 BA view · diff
git:20260907.09f3a502026-09-07 09f3a50 21,694 BA view · diff
git:20260901.f8c37b82026-09-01 f8c37b8 21,972 BA view · diff
git:20260827.c2ade4b2026-08-27 c2ade4b 22,002 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 (10459 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

michael-denyer/pstack-claude · 286 stars · license MIT · pushed 2026-09-09 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_6cpwwqdepd3hqn4s
GET https://markdownregistry.com/api/v1/resolve?ref=michael-denyer/pstack-claude/why
GET https://markdownregistry.com/api/v1/blob/0691b6378ee2505b270627321ae7eb88d31fd22d7aecc1cb1cd357631eb6f635