guarding-destructive-operations SKILL.md skillA
guarding-destructive-operations from kajisho5/ffmpeg-skill is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kajisho5/ffmpeg-skill/guarding-destructive-operations@git:20260906.24c1610Pins git:20260906.24c1610 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kajisho5/ffmpeg-skill
- Path
.claude/skills/destructive-operations/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260906.24c1610, committed Sep 6, 2026
- Size
- 10,543 bytes
- Repository stars
- 2,026
- License
- MIT
Add and review preconditions on operations that delete, overwrite, rewrite history, or resolve a caller-supplied name to a filesystem path — refusing instead of warning, placing the guard ahead of the first mutation, structural classification rather than string-prefix matching, name validation plus resolved-path containment as two independent checks, why a guard on the destructive path is invisible to the dry-run, and mutation-testing each half separately. Use when writing or reviewing a…
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
# Guarding Destructive Operations Some operations have no undo: an orphan-branch rewrite, a recursive delete of every tracked file, an overwrite of a stored artifact, a `DROP`/`purge` path. The implementation is usually short and usually correct *for the setup its author had in mind*. The bug is never the deletion itself — it is that nothing checked whether the target was the thing the author imagined. Two shapes recur, and they take the same fix: - **Blast radius.** The operation is correct only in a dedicated, single-purpose target and is catastrophic in a mixed one. - **Boundary escape.** A caller-supplied name is joined onto a base directory and lands outside it. ## Refuse; don't warn, and don't add an override A destructive operation that discovers its precondition is violated should return an error and change nothing. A warning is read by nobody, and a `--force` escape hatch turns the guard into documentation. ```go // A rebuild that recreates history does `checkout --orphan` then // `rm -rf --ignore-unmatch .`, keeping only the state files it rewrites. // That is correct in a dedicated mirror repository whose ONLY tracked content …
Read the whole file at its exact version.
How to install
mdr add kajisho5/ffmpeg-skill/guarding-destructive-operations@sha256:06decc8e6d258063The line at the top of this page pins the label git:20260906.24c1610, 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_zkvoulztqffxqlqy)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 6, 2026.
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 (10543 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
kajisho5/ffmpeg-skill · 2,026 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zkvoulztqffxqlqy GET https://markdownregistry.com/api/v1/resolve?ref=kajisho5/ffmpeg-skill/guarding-destructive-operations GET https://markdownregistry.com/api/v1/blob/06decc8e6d2580632255d1562ca79b50ab597afb32beec2d84e28371f07fc29d
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.