performance-capacity SKILL.md skillA
performance-capacity from majiayu000/spellbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add majiayu000/spellbook/performance-capacity@git:20260626.97a677ePins git:20260626.97a677e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- majiayu000/spellbook
- Path
skills/performance-capacity/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260626.97a677e, committed Jun 26, 2026
- Size
- 2,002 bytes
- Repository stars
- 290
- License
- MIT
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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: 1. User-facing operation or background job under test. 2. Current p50/p95/p99 latency or throughput. 3. Data size and concurrency assumptions. 4. Resource limits: CPU, memory, IO, network, database, queue. 5. Existing cache behavior and invalidation rules. 6. 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. …
Read the whole file at its exact version.
How to install
mdr add majiayu000/spellbook/performance-capacity@sha256:a20f17ad4866cbf2The line at the top of this page pins the label git:20260626.97a677e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_htma5cry7b7zpaio)
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Versions
The registry has recorded 1 version of this file, committed on Jun 26, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2002 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
majiayu000/spellbook · 290 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_htma5cry7b7zpaio GET https://markdownregistry.com/api/v1/resolve?ref=majiayu000/spellbook/performance-capacity GET https://markdownregistry.com/api/v1/blob/a20f17ad4866cbf2dcaed7b60fc4241dc2f499509e4b3d8fefe3ac71bc3e4d20
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.