performance-check
Skill1 starsChanged 7 months agoMITView on GitHub
This skill should be used when the user asks to "check performance", "mac is slow", "why is my mac slow", "cpu usage", "memory pressure", or "what's slowing me down". Reports load average, memory pressure, swap, top processes, thermal state, and battery health, then writes a JSON result to ~/.mac-guardian/data/.
4 other projects use a version of this.
Adopted by
Most recently taken up by
- teachskillofskills-ai/DigitalMarketingPro-techshutheir own version, first seen Oct 11, 2026
- ZeroDeng01/sublinkProtheir own version, first seen Oct 8, 2026
- joris887/exosuittheir own version, first seen Aug 20, 2026
- indranilbanerjee/digital-marketing-protheir own version, first seen Feb 12, 2026
Other versions4 projects use a version of this.
Word for word · 0
None found.
Edited · 0
None found.
Wrote their own version · 4
- ZeroDeng01/sublinkPro★ 1.7ksame name
- indranilbanerjee/digital-marketing-pro★ 934same name
- joris887/exosuit★ 9same name
- teachskillofskills-ai/DigitalMarketingPro-techshu★ 0same name
How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.
In this repository8 other files it gives its agents.
- bluetooth-debugSkill
- daily-health-reportSkill
- disk-usageSkill
- machine-security-checkSkill
- malware-scanSkill
- network-diagnosticsSkill
- setup-health-cronSkill
- wifi-debugSkill
The file
We split this skill into the rules it gives an agent
2 rules. 0 are common, 1 is distinctive, and 1 is very specific to this project.
0
Common
Most of the 4 edited versions we read keep these.
1
Distinctive
This author's own choices. Worth a look.
1
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Very specific: line 64
When invoked by daily-health-report, return JSON path only.
- Distinctive: line 68
Read-only. Do not kill processes.
“Common” is measured: kept by at least 6 in 10 of the 4 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
performance-check
Captures a point-in-time performance snapshot on macOS.
When to invoke
Trigger on phrases like: "check performance", "mac is slow", "why is my mac slow", "cpu usage", "memory pressure", "what's slowing me down".
What to check
1. Load averages — sysctl -n vm.loadavg or uptime. Compare 1-minute load to sysctl -n hw.ncpu.
- load / ncpu < 0.7:
ok - 0.7–1.0:
info - 1.0–2.0:
warn 2.0:
critical
2. Memory pressure — vm_stat (pages free / active / inactive / speculative / wired). Compute pressure ratio: (free + inactive) / total.
20% free+inactive:
ok- 10–20%:
info - 5–10%:
warn - <5%:
critical
Also parse memory_pressure output when available (memory_pressure 2>/dev/null | tail -5).
3. Swap usage — sysctl vm.swapusage. Parse "used = X.XXM".
- used = 0:
ok - used < 512 MB:
info - 512 MB – 2 GB:
warn 2 GB:
critical
4. Top 10 CPU consumers — top -l 1 -n 10 -o cpu -stats pid,command,cpu,mem. Record rows.
5. Top 10 memory consumers — top -l 1 -n 10 -o mem -stats pid,command,cpu,mem. Record rows.
6. Thermal state — pmset -g therm 2>/dev/null. Non-zero CPU_Speed_Limit = warn with the value.
7. Battery status (laptops only) — pmset -g batt. Parse percentage, AC Power/Battery Power, charging state. Low percentage on battery with no charger: info.
8. Battery health (laptops only) — ioreg -rc AppleSmartBattery 2>/dev/null. Extract CycleCount, MaxCapacity, DesignCapacity, AppleRawMaxCapacity. Compute MaxCapacity/DesignCapacity × 100:
- ≥ 85%:
ok - 75–85%:
info - 60–75%:
warn - < 60%:
criticalSkip gracefully on desktops.
9. Power summary — system_profiler SPPowerDataType 2>/dev/null | head -60 in raw.
10. Uptime — uptime. Uptime > 14 days: info "Consider rebooting; uptime N days."
Output contract
Standard envelope. Write to ~/.mac-guardian/data/performance-check-<ISOdate>.json.
Summary example: "Load 1.32 / 10, 18% memory free, swap 0.0 MB, battery health 92%."
Handoff
- On direct invocation:
bash ${CLAUDE_PLUGIN_ROOT}/scripts/render-single.sh performance-check. - When invoked by
daily-health-report, return JSON path only.
Safety
- Read-only. Do not kill processes. Do not change pmset settings.
- No
sudo.
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