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verifying-external-behavior

75 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.

By kajisho5/ffmpeg-skill (GitHub) · coding · 4,939 stars · scanned at commit 6e42a79

Confirms what a third-party library, remote API, build backend, or scraped document actually does before writing code that depends on it — throwaway probes that run in seconds, permissive clients that forward wrong arguments instead of rejecting them, per-endpoint docs that don't generalize, response shapes that make a "fast path" always-false, fakes that encode your assumption rather than the service's behavior, and dry-runs that skip the step that fails. Use when integrating a new dependency …

Works with any agent that supports SKILL.md skills.

What this skill can do

Safer alternatives

Low-risk skills in the same category (coding) that look related. Check that one does what you need.

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Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'verifying-external-behavior' ] || [ -L ~/.agents/skills/'verifying-external-behavior' ]; then echo 'A skill folder named verifying-external-behavior already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/kajisho5/ffmpeg-skill' "$d" && git -C "$d" checkout --quiet '6e42a79247909659b3d80833120b272fb5e46aba' -- '.claude/skills/verifying-external-behavior' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/verifying-external-behavior' ~/.agents/skills/'verifying-external-behavior' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'verifying-external-behavior' ~/.claude/skills/'verifying-external-behavior' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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