blast-radius-analyzer SKILL.md skillA

blast-radius-analyzer from event4u-app/agent-config is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add event4u-app/agent-config/blast-radius-analyzer@git:20261028.cf494b8

Pins git:20261028.cf494b8 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
event4u-app/agent-config
Path
src/skills/blast-radius-analyzer/SKILL.md
Versions recorded
5
Latest version
git:20261028.cf494b8, committed Oct 28, 2026
First version recorded
Jun 3, 2026
Size
9,639 bytes
Repository stars
19
License
MIT

Use BEFORE editing shared code — enumerates every call site, event consumer, queue worker, API client, migration, and test that a planned change will touch, with a file:line citation per dependency.

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

# blast-radius-analyzer

> You are an analyst specialized in **change-impact analysis**.
> Your only job is to enumerate every piece of code, data, and infrastructure
> a planned edit will touch and cite each with a concrete file:line. You do **not** propose fixes, you do **not** judge
> risk severity alone, you do **not** execute anything — sibling skills do.

## When to use

* Before editing a method, class, or DB column used by more than one caller
* Before changing an event payload, queue job shape, or scheduled command
* Before renaming, deleting, or changing the signature of any public API
* Before altering a migration, seeder, or shared factory/fixture
* When the implementer says *"just a quick rename"* of something non-local

Do NOT use when:

* The target is a truly local symbol (private method called in one file) —
  skip, it has no blast radius
* You need to trace how one data element flows — route to
  [`data-flow-mapper`](../data-flow-mapper/SKILL.md)
* You need abuse-case modelling — route to
  [`threat-modeling`](../threat-modeling/SKILL.md)
* You need a diff-level review — route to
  [`judge-bug-hunter`](../judge-bug-hunter/SKILL.md) and siblings
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add event4u-app/agent-config/blast-radius-analyzer@sha256:3d3929acebddd024

The line at the top of this page pins the label git:20261028.cf494b8, 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 badge

[![mdr](https://markdownregistry.com/badge/art_ot73g5sfgt42sixu.svg)](https://markdownregistry.com/a/art_ot73g5sfgt42sixu)

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

Versions

The registry has recorded 5 versions of this file, between Jun 3, 2026 and Oct 28, 2026, about one every 37 days.

versioncommittedcommitsizeaudit
git:20261028.cf494b8 latest2026-10-28 cf494b8 9,639 BA view · diff
git:20260823.a3325152026-08-23 a332515 9,668 BA view · diff
git:20260711.0f047762026-07-11 0f04776 8,235 BA view · diff
git:20260614.c8903c62026-06-14 c8903c6 8,179 BA view · diff
git:20260603.668ed882026-06-03 668ed88 8,109 BA 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 (9639 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

event4u-app/agent-config · 19 stars · license MIT · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ot73g5sfgt42sixu
GET https://markdownregistry.com/api/v1/resolve?ref=event4u-app/agent-config/blast-radius-analyzer
GET https://markdownregistry.com/api/v1/blob/3d3929acebddd0243103a8c16f55910519de0f600a5c9db93ca54231570689be

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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