blast-radius SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 5 indexed copies. Same content hash, so the same checks give both the same grade.
blast-radius from backnotprop/pstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add backnotprop/pstack/blast-radius@git:20261008.4aed5afPins git:20261008.4aed5af in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- backnotprop/pstack
- Path
skills/blast-radius/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261008.4aed5af, committed Oct 8, 2026
- First version recorded
- Aug 19, 2026
- Size
- 3,856 bytes
- Repository stars
- 3,337
- License
- MIT
Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe because of by running real code instead of writing it up. Use for 'blast radius of X', 'what could this break', or reviewing a small diff you don't trust.
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 Find what a change breaks somewhere else, before it ships. Use for "blast radius of X", "what could this break", or reviewing a small diff you don't trust yet. Companion to `how` and `why`. `how` tells you what the code does. `why` tells you why it's shaped that way. Blast radius tells you what it breaks somewhere else. Listing the callers is not the job. The agent can grep those in a second. The job is the breakage grep won't show you. ## Don't trust your own writeup A blast-radius writeup that sounds right is worthless. It reads as convincing whether or not it's true. So don't hand back the writeup. Find the one or two facts the whole thing depends on and prove them by running code. ### How sure are you For each fact the change's safety depends on, get it as far down this list as is cheap, and say where it stopped. 1. You said so. Worthless on its own. 2. You pointed at the line. A real `file:line`, or the library's own source. 3. You showed the bad case can't happen. You walked the failure step by step and it doesn't reach. 4. You ran it. A script or test that calls the real code and fails loud if you're wrong. 5. You reproduced it in the running app. …
Read the whole file at its exact version.
How to install
mdr add backnotprop/pstack/blast-radius@sha256:2e10745b97f58623The line at the top of this page pins the label git:20261008.4aed5af, 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.
[](https://markdownregistry.com/a/art_mkvwaob5i4nyzkv3)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Aug 19, 2026 and Oct 8, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.4aed5af latest | 2026-10-08 | 4aed5af | 3,856 B | A | view · diff |
| git:20261004.c0c3f13 | 2026-10-04 | c0c3f13 | 3,851 B | A | view · diff |
| git:20260914.55bfdc2 | 2026-09-14 | 55bfdc2 | 4,016 B | A | view · diff |
| git:20260819.4b32d9d | 2026-08-19 | 4b32d9d | 4,112 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3856 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
backnotprop/pstack · 3,337 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mkvwaob5i4nyzkv3 GET https://markdownregistry.com/api/v1/resolve?ref=backnotprop/pstack/blast-radius GET https://markdownregistry.com/api/v1/blob/2e10745b97f5862323dcda3b29ca60d56b5c3c98e37020085d26b48efbe0a436
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.
More from backnotprop/pstack
Every file in backnotprop/pstack