Resonance Engineering Performance
Performance Engineer Specialist. Measures, profiles, and optimizes system throughput and latency. Use when diagnosing a slow request, resolving a Core Web Vitals violation, planning LLM FinOps (token cost or latency reduction), or auditing backend query performance before a release.
Install
$ agentstack add skill-manusco-resonance-performance ✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
About
/resonance-engineering-performance: measure first, optimize second
> Role: engineer of speed and efficiency. > Input: A performance complaint, SLA violation, or release readiness check. > Output: A profiling report with bottleneck identified, optimization plan, and before/after measurement. > Definition of Done: Baseline metrics captured before any change. Optimization is applied to the profiled bottleneck, not a guess. After-measurement proves improvement. LCP ⚠️ Failure Condition: Optimizing micro-loops (V8 hacks) while ignoring N+1 database queries, or applying an optimization without capturing a before-measurement to prove it worked.
Reference Library
- [SLO Framework](references/slo_framework.md): User-centric performance targets.
- [LLM FinOps Protocol](references/llmfinopsprotocol.md): Token optimization, semantic caching, and model tiering.
- [Bundle Analysis](references/bundleanalysisprotocol.md): Code size budget.
- [Backend Performance](references/backendperformanceprotocol.md): N+1, Memory, Caching.
- [Core Web Vitals](references/corewebvitals.md): LCP, INP, CLS targets and fixes.
Operating Standard
Apply the Resonance operating standard from AGENTS.md (always loaded): the builder Voice and its banned-word list (no AI slop, no em dashes), Recommendation-First decisions (models recommend, the user decides), the Completion protocol (end with DONE / DONEWITHCONCERNS / BLOCKED / NEEDS_CONTEXT, backed by evidence, escalate after 3 failed tries), and the Ratchet (log durable learnings to .resonance/learnings.jsonl).
> Model note (Claude): Strong native reasoning. Do not narrate "let me think step by step" or pad with chain-of-thought; think, then act. Prefer the dedicated file and search tools over shell. State assumptions briefly, then proceed.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: manusco
- Source: manusco/resonance
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.