system-design-building-blocks SKILL.md skillA
system-design-building-blocks from hoangnguyen0403/agent-skills-standard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hoangnguyen0403/agent-skills-standard/system-design-building-blocks@git:20261027.4acc21fPins git:20261027.4acc21f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hoangnguyen0403/agent-skills-standard
- Path
.claude/skills/system-design/system-design-building-blocks/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261027.4acc21f, committed Oct 27, 2026
- First version recorded
- Aug 30, 2026
- Size
- 5,125 bytes
- Repository stars
- 583
- License
- MIT
Select infrastructure components by the constraint each removes: load balancers, caches and invalidation, queues and pub/sub, CDN, API gateway, rate limiting, consistent hashing. Use when choosing cache, queue, replica, or edge layers; defer engine tuning to the database category.
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
# System Building Blocks ## **Priority: P1 (HIGH)** Add a component only to remove a named constraint. Every component adds failure modes and cost. ## Selection Table | Constraint observed | Component | Cost accepted | | --- | --- | --- | | One instance saturates CPU or connections | Horizontal scaling behind a load balancer | Statelessness required; session moves to a store | | Read QPS exceeds store ceiling; data tolerates staleness | Read-through cache | Stale reads up to TTL; invalidation complexity | | Write spikes exceed sustainable store throughput | Queue plus async worker | Eventual completion; needs idempotent consumers | | Slow non-critical work blocks the request path | Background job or event | Extra delivery guarantees to reason about | | Static or media bytes dominate egress | CDN | Cache purge lag; origin still needed for misses | | Cross-cutting authn, quota, routing repeated per service | API gateway | Central chokepoint; fails closed and needs its own failure capacity | | One tenant or key can exhaust capacity | Rate limiter or admission control | Rejections need clear client contracts | …
Read the whole file at its exact version.
How to install
mdr add hoangnguyen0403/agent-skills-standard/system-design-building-blocks@sha256:48d3b5576fd8862cThe line at the top of this page pins the label git:20261027.4acc21f, 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_6r5mvjhwdcybxkhk)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 30, 2026 and Oct 27, 2026, about one every 58 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.4acc21f latest | 2026-10-27 | 4acc21f | 5,125 B | A | view · diff |
| git:20260830.00e03f4 | 2026-08-30 | 00e03f4 | 3,879 B | A | view |
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 (5125 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
hoangnguyen0403/agent-skills-standard · 583 stars · license MIT · pushed 2026-11-07 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_6r5mvjhwdcybxkhk GET https://markdownregistry.com/api/v1/resolve?ref=hoangnguyen0403/agent-skills-standard/system-design-building-blocks GET https://markdownregistry.com/api/v1/blob/48d3b5576fd8862c5afafce441deb9872ec059dae3fe413dac43bf5e7180ff6a
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.
More from hoangnguyen0403/agent-skills-standard
Every file in hoangnguyen0403/agent-skills-standard