blast-radius SKILL.md skillA
blast-radius from michael-denyer/pstack-claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add michael-denyer/pstack-claude/blast-radius@git:20261008.5062f28Pins git:20261008.5062f28 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- michael-denyer/pstack-claude
- Path
plugins/pstack/skills/blast-radius/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261008.5062f28, committed Oct 8, 2026
- First version recorded
- Jul 4, 2026
- Size
- 4,169 bytes
- Repository stars
- 3,263
- 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', reviewing a small diff you don't trust, or a brief that asserts something about existing code ('make X public', 'X already handles Y') before you design against that assertion.
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. Run it before design, not only before shipping, when a brief asserts something about existing code ("make endpoint X public"): the assertion is a hypothesis, and the consumer census is what decides the design.
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.
…Read the whole file at its exact version.
How to install
mdr add michael-denyer/pstack-claude/blast-radius@sha256:03f44dbf518c0b87The line at the top of this page pins the label git:20261008.5062f28, 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_qm5ysi7ggihbxwtp)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jul 4, 2026 and Oct 8, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.5062f28 latest | 2026-10-08 | 5062f28 | 4,169 B | A | view · diff |
| git:20260923.4a3ef20 | 2026-09-23 | 4a3ef20 | 4,164 B | A | view · diff |
| git:20260907.ebb8c27 | 2026-09-07 | ebb8c27 | 4,329 B | A | view · diff |
| git:20260907.09f3a50 | 2026-09-07 | 09f3a50 | 4,425 B | A | view · diff |
| git:20260907.c81549e | 2026-09-07 | c81549e | 4,523 B | A | view · diff |
| git:20260827.7ac420e | 2026-08-27 | 7ac420e | 4,179 B | A | view · diff |
| git:20260704.1d791c8 | 2026-07-04 | 1d791c8 | 4,081 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 (4169 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
michael-denyer/pstack-claude · 3,263 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qm5ysi7ggihbxwtp GET https://markdownregistry.com/api/v1/resolve?ref=michael-denyer/pstack-claude/blast-radius GET https://markdownregistry.com/api/v1/blob/03f44dbf518c0b87b19b70c57af40cf74dd70fb5affa6550ab508751325760c0
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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