system-design-estimation SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
system-design-estimation 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-estimation@git:20261021.8da3953Pins git:20261021.8da3953 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
.agents/skills/system-design/system-design-estimation/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261021.8da3953, committed Oct 21, 2026
- First version recorded
- Aug 30, 2026
- Size
- 4,576 bytes
- Repository stars
- 583
- License
- MIT
Compute defensible capacity numbers before architecture: average and peak QPS, storage growth, bandwidth, working-set memory, latency and availability budgets. Use when sizing a service, provisioning infrastructure, or checking that a design survives peak load.
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
# Capacity Estimation ## **Priority: P1 (HIGH)** Estimate before you architect. One order of magnitude decides cache, shard, and queue choices. ## Core Formulas - `average QPS = DAU x actions per user per day / 86,400` - `peak QPS = average QPS x peak factor` (default 5x; 20-100x for flash sale, ticket drop, or scheduled push) - `storage per year = writes per day x record size x 365 x replication factor` - `bandwidth = QPS x payload size` (compute ingress and egress separately) - `working set = hot records x record size`, where hot is typically 20% of data serving 80% of reads - `connections = concurrent users x connections per user`; compare against pool and file-descriptor limits ## Method 1. Round every input to one significant figure. Precision here is false precision. 2. Compute average, then peak, then storage, then bandwidth, then memory. 3. Compare each result to a known ceiling from [estimation numbers](references/estimation-numbers.md): single-node QPS, disk IOPS, NIC throughput, RAM per instance. 4. Name the **shaping quantity** - the first number that breaks a single-node ceiling. It dictates the first component added in high-level design. …
Read the whole file at its exact version.
How to install
mdr add hoangnguyen0403/agent-skills-standard/system-design-estimation@sha256:5ce0074b3351cc3eThe line at the top of this page pins the label git:20261021.8da3953, 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_xpsuqglwumdrcxo7)
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Versions
The registry has recorded 2 versions of this file, between Aug 30, 2026 and Oct 21, 2026, about one every 52 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261021.8da3953 latest | 2026-10-21 | 8da3953 | 4,576 B | A | view · diff |
| git:20260830.00e03f4 | 2026-08-30 | 00e03f4 | 3,686 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 (4576 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_xpsuqglwumdrcxo7 GET https://markdownregistry.com/api/v1/resolve?ref=hoangnguyen0403/agent-skills-standard/system-design-estimation GET https://markdownregistry.com/api/v1/blob/5ce0074b3351cc3ecc3b230c45bf17af7e31955d89a5c1b00db59418f2bb6fd7
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.
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