bolivian-peru/nix-optimizer
skills/nix-optimizer/SKILL.md
Intelligent Nix store management. Analyze store usage, identify waste, optimize garbage collection, and track generation history.
$ install --global
skillsauthnpx skillsauth add bolivian-peru/os-moda nix-optimizerInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 20, 2026, 3:00 AM6.3s1 file scanned
SKILL.md
- name:
- nix-optimizer
- description:
- >
- activation:
- auto
Nix Store Optimizer
Intelligent garbage collection and store management.
Store Analysis
shell_exec({ command: "du -sh /nix/store 2>/dev/null" })
shell_exec({ command: "nix-store --gc --print-dead 2>/dev/null | wc -l" })
shell_exec({ command: "nixos-rebuild list-generations 2>/dev/null | tail -20" })
Smart GC Strategy
Don't just nix-collect-garbage -d. Be intelligent:
- Always keep: current generation, last known-good, backup baseline
- Analyze: which generations introduced large store additions
- Recommend: targeted cleanup with estimated space recovery
Nix Store Report:
Store size: 28.4 GB across 47 generations
Recommended to keep:
Gen 50 (current) — 12.1 GB active
Gen 47 (pre-OpenSSL update) — rollback point
Gen 42 (last backup baseline)
Safe to remove: 44 generations → reclaims ~19 GB
Large items:
/nix/store/...-linux-6.6.12 (old kernel) — 980 MB
/nix/store/...-chromium-121 (old browser) — 1.4 GB
/nix/store/...-texlive-2023 (unused) — 2.1 GB
Proceed with smart cleanup?
Execution
shell_exec({ command: "nix-collect-garbage --delete-older-than 14d" })
shell_exec({ command: "nix-store --optimise" }) # dedup hardlinks
Post-Cleanup
memory_store({
summary: "Nix GC: freed 19GB, kept gens 42,47,50",
detail: "Store reduced from 28.4GB to 9.3GB. 44 generations removed.",
category: "system.config",
tags: "nix,garbage-collection,optimization"
})
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