marcel-bich/marcel-bich-claude-marketplace · plugins/credo/skills/diag/SKILL.md

diag skillB

diag is agent-read markdown (skill) from marcel-bich/marcel-bich-claude-marketplace: Read-only root-cause diagnosis for a symptom, bug, failure, or unexpected behavior. Establishes the mechanism at file:line and reads up the facts instead of guessing, before any fix is attempted. Produces a diagnosis report; the fix is always a separate step gated by an explicit GO. Use when something is broken, failing, throwing, or behaving unexpectedly and the cause is not yet proven, or when asked to investigate or find the root cause. Not for judging whether finished work meets its requirem.

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 marcel-bich/marcel-bich-claude-marketplace/diag@git:20260704.cc8aebc
Exact content
mdr add marcel-bich/marcel-bich-claude-marketplace/diag@sha256:152568178fa09ae7

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_agputgbed3g3npmz.svg)](https://markdownregistry.com/a/art_agputgbed3g3npmz)

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Versions

versioncommittedcommitsizeaudit
git:20260704.cc8aebc latest2026-07-04 cc8aebc 4,325 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No instruction to read or print local credentials (matched: read credentials, tokens, `.env)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4325 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 base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

marcel-bich/marcel-bich-claude-marketplace · 13 stars · license MIT · pushed 2026-09-13 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_agputgbed3g3npmz
GET https://markdownregistry.com/api/v1/resolve?ref=marcel-bich/marcel-bich-claude-marketplace/diag
GET https://markdownregistry.com/api/v1/blob/152568178fa09ae7cb3b19fbdf9700c42fb7b8e91c9a2507716a7995f4eaca54

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.