rate-limiter SKILL.md skillA
rate-limiter from pierry/harness-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add pierry/harness-kit/rate-limiter@git:20260615.091526bPins git:20260615.091526b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- pierry/harness-kit
- Path
.claude/agents/system-architect/skills/rate-limiter/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260615.091526b, committed Jun 15, 2026
- Size
- 8,740 bytes
- Repository stars
- 4
- License
- MIT
Design a distributed rate limiter at scale, policy model, enforcement layers (edge/gateway/service), algorithms (token bucket, sliding window), hot keys, fail-open vs fail-closed, multi-region, shadow mode. Topic playbook from the System Design series EP (Rate Limit #2). Use when the system is a rate limiter, throttle, quota enforcer, or abuse/cost guard. Sensors and evals gate.
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
Design a distributed rate limiter. Topic playbook. The agent loads this reference and adapts it to the
user's real scale, policy, and latency budget, then emits the SDD via the generic template.
Use when the problem is: rate limiting, throttling, quota/budget enforcement, abuse protection, or
cost control in front of an expensive dependency (LLM, search, third-party API).
Ask once if missing: enforcement point (edge / gateway / in-service / layered), the limit key
(user / token / IP / tenant / endpoint), hard vs soft limit, fail-open or fail-closed, single vs
multi-region, accuracy tolerance.
Read:
- guides/design-method.md
- guides/writing-style.md
- guides/templates/system-design.md
- guides/pipeline.md
Generate the SDD using the template, filled with the reference below, adapted to user scale.
Save to .claude/runtime/outputs/architect/design/{feature_id}.md.
Sensors: sensors/design-structure.md, sensors/design-rigor.md. Evals: evals/design-quality.md.
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## Reference architecture (adapt, do not copy blindly)
One line: rate limiting is not "a counter with TTL in Redis". That solves part of it. The real design
…Read the whole file at its exact version.
How to install
mdr add pierry/harness-kit/rate-limiter@sha256:2913e104b28a88b2The line at the top of this page pins the label git:20260615.091526b, 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_7zkk6qrjkkhp33ux)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 15, 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 (8740 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
pierry/harness-kit · 4 stars · license MIT · pushed 2026-10-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7zkk6qrjkkhp33ux GET https://markdownregistry.com/api/v1/resolve?ref=pierry/harness-kit/rate-limiter GET https://markdownregistry.com/api/v1/blob/2913e104b28a88b242fb5e4b35a6e83f1012640404ac67777131c308b81e11d2
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.