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performance-capacity

Plan, diagnose, and verify performance budgets, latency targets, load tests, capacity estimates, bottleneck analysis, caching strategy, query efficiency, queue throughput, and regression gates. Use when a feature may be slow, a system must scale, a performance regression is suspected, or release readiness depends on throughput, cost, memory, CPU, or response time.

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majiayu000/spellbook

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包含的文件（2）

SKILL.md2.0 KB
agents/openai.yaml253 B

SKILL.md（原文）

安装前可以查看交给 AI 代理的指令内容。

Performance Capacity

Purpose

Use this skill to make performance measurable before optimizing. It turns vague "make it faster" work into budgets, probes, bottleneck hypotheses, and regression gates.

Baseline First

Before changing code, capture:

User-facing operation or background job under test.
Current p50/p95/p99 latency or throughput.
Data size and concurrency assumptions.
Resource limits: CPU, memory, IO, network, database, queue.
Existing cache behavior and invalidation rules.
Cost or quota constraints.

If no baseline can be gathered, state the nearest measurable proxy and its limitations.

Budget Design

Define budgets by surface:

Surface	Examples
UI	TTI, interaction latency, bundle size, render count
API	p95 latency, error rate, DB query count, payload size
Jobs	throughput, max lag, retry cost, idempotency
Data	query plan, index coverage, backfill duration
Infra	CPU/RSS, concurrency, autoscaling, cost per request

Optimization Rules

Optimize the measured bottleneck, not the most familiar code.
Prefer algorithmic, query, batching, and cache correctness fixes before capacity-only fixes.
Define cache invalidation and stale-data tolerance.
Add a regression test, benchmark, or dashboard check for risky paths.
Do not trade correctness, authorization, or tenant isolation for speed.

Output Shape

operation:
baseline:
target_budget:
bottleneck_hypothesis:
measurement_plan:
optimization_options:
capacity_estimate:
regression_gate:
verification_commands:

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