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blindspot SKILL.md skillA

blindspot from ucsandman/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add ucsandman/claude-skills/blindspot@git:20260905.41afbd2

Pins git:20260905.41afbd2 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: ucsandman/claude-skills
Path: blindspot/SKILL.md
Versions recorded: 3
Latest version: git:20260905.41afbd2, committed Sep 5, 2026
First version recorded: Aug 12, 2026
Size: 2,079 bytes
Repository stars: 5
License: MIT

Inspect unfamiliar or high-stakes code before edits, including auth, billing, and migrations.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Blindspot

Hunt unknown unknowns: the risks nobody thought to ask about. Output is a short ranked set of blindspot cards, each grounded in this codebase with a concrete next move — never a generic risk checklist.

## Steps

1. **Map the territory.** Read the target module, its callers, its tests, and its config/env wiring. Blindspots live in the connections, not the file itself.
2. **Sweep the classic hiding places** against the actual code:
   - Hidden state and side effects (module-level mutables, caches, singletons)
   - Implicit invariants the code assumes but never checks (ordering, uniqueness, non-null)
   - Swallowed errors: catch blocks that hide failure, fallbacks that mask bugs
   - Concurrency and ordering: races, double-fires, retry without idempotency
   - Config/env coupling: behavior that changes across environments
   - AuthZ edges: who else can reach this path, what happens unauthenticated
   - Back-compat and migration traps: persisted data shaped by old code
3. **Write blindspot cards.** Each card:
   - **What you likely don't know** — one sentence
   - **Evidence** — `file:line` in this repo (no evidence, no card)
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add ucsandman/claude-skills/blindspot@sha256:e55fe05c5c9dce81

The line at the top of this page pins the label git:20260905.41afbd2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_ldx27qw2juvgw7hv.svg)](https://markdownregistry.com/a/art_ldx27qw2juvgw7hv)

6 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Aug 12, 2026 and Sep 5, 2026, about one every 12 days.

version	committed	commit	size	audit
git:20260905.41afbd2 latest	2026-09-05	41afbd2	2,079 B	A	view · diff
git:20260904.14d2e37	2026-09-04	14d2e37	2,128 B	A	view · diff
git:20260812.9665e9c	2026-08-12	9665e9c	2,272 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (2079 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

ucsandman/claude-skills · 5 stars · license MIT · pushed 2026-09-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ldx27qw2juvgw7hv
GET https://markdownregistry.com/api/v1/resolve?ref=ucsandman/claude-skills/blindspot
GET https://markdownregistry.com/api/v1/blob/e55fe05c5c9dce81e0c0ba10c19e66cec6363ad345da5bce6d3814413187c94d

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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