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, and that is the trap you are walking into. So don't hand back the writeup. Find the one or two facts the whole thing depends on and prove them by running code. Words are where you start, not what you ship.
### 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.
…
The line at the top of this page pins the label git:20260827.f7b391a, 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.
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 (4112 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
shiwenbin1617/pstack · 3 stars · license a license file GitHub does not identify · pushed 2026-09-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6x6plb2u4sp3nmai
GET https://markdownregistry.com/api/v1/resolve?ref=shiwenbin1617/pstack/blast-radius
GET https://markdownregistry.com/api/v1/blob/b060df3ca85803eabbce9fab53f5cc024ca8d784bdde5513c1c1a784947523f8
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.
shiwenbin1617/pstack · adapters/claude-code/overrides/setup-pstack/SKILL.md · Configure which Claude Code models pstack uses per role. Use for /setup-pstack or requests to change pstack model…
shiwenbin1617/pstack · adapters/codex/overrides/setup-pstack/SKILL.md · Configure optional per-role model preferences for pstack on Codex. Use for $setup-pstack or requests to change pstack…
shiwenbin1617/pstack · automations/benny/skills/reproduce-and-fix-issues/SKILL.md · Reproduce triaged Slack bugs through a configured app-control adapter, verify existing fixes, and open a bounded draft…
shiwenbin1617/pstack · automations/benny/skills/setup-benny/SKILL.md · Configure Benny and prepare its triage and repro automations. Use when installing Benny or changing its Slack, tracker…
shiwenbin1617/pstack · skills/architect/SKILL.md · Design types, interfaces, and module ownership for a requested architectural change or an unresolved design choice.
shiwenbin1617/pstack · skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
shiwenbin1617/pstack · skills/automate-me/SKILL.md · Use for "automate me", "create/update/refresh my -mode skill", "turn/capture my preferences or working style into a…
shiwenbin1617/pstack · skills/create-verification-skill/SKILL.md · Generate a project-local verification skill that drives your app the way a user does — any language, framework, or…
shiwenbin1617/pstack · skills/figure-it-out/SKILL.md · Plan and execute a complex task when existing playbooks do not cover its dependencies or completion criteria.
cursor/plugins · pstack/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
cursor/plugins · harness/pstack/claude-code/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
michael-denyer/pstack-claude · plugins/pstack/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
backnotprop/pstack · skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
pedrohcgs/claude-code-my-workflow · .claude/skills/blast-radius/SKILL.md · Before and after changing anything shared — a function's return value, a signature, a schema, a label set, a config…
pixeltable/pixeltable · .claude/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
athola/claude-night-market · plugins/pensive/skills/blast-radius/SKILL.md · Analyzes code change impact with risk scoring and affected-node mapping. Use before merging to understand what a change…
parcha-ai/parcha-skills · blast-radius/skills/blast-radius/SKILL.md · Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe…
