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analyze-jfr

90 / 100 · Low risk

Fine to try.

By petrbouda/jeffrey (GitHub) · other · 81 stars · scanned at commit b7fcdb7

Analyses a JVM profile held by a running Jeffrey Microscope — CPU, wall-clock, allocation, lock contention, trace latency, and the machine underneath: garbage collection, safepoints, JIT compilation, threads, native memory, the container and the JVM's configuration. Starts from the catalogue or from a .jfr file Jeffrey has not seen yet. Use whenever the user asks why something is slow, where the time goes, what is allocating, why GC pauses are long, what is pausing the JVM, what the JIT compile…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

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

if [ -e ~/.agents/skills/'analyze-jfr' ] || [ -L ~/.agents/skills/'analyze-jfr' ]; then echo 'A skill folder named analyze-jfr already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/petrbouda/jeffrey' "$d" && git -C "$d" checkout --quiet 'b7fcdb7b36f8f188c3d9642fd8aabc46dc882b20' -- 'jeffrey-agent-plugin/skills/analyze-jfr' && mkdir -p ~/.agents/skills && cp -R "$d"/'jeffrey-agent-plugin/skills/analyze-jfr' ~/.agents/skills/'analyze-jfr' && 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/'analyze-jfr' ~/.claude/skills/'analyze-jfr' (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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