search-engine SKILL.md skillA
search-engine 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/search-engine@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/search-engine/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260615.091526b, committed Jun 15, 2026
- Size
- 8,635 bytes
- Repository stars
- 4
- License
- MIT
Design a web-scale search engine (crawler, processing, indexing, query serving). Topic playbook from the System Design series EP24. Use when the system is a search engine, web crawler, or large-scale retrieval system. 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 search engine. Topic playbook. The agent loads this canned reference architecture and
adapts it to the user's actual scale and constraints, then emits the SDD via the generic template.
Use when the problem is: web search, site/doc search at scale, a crawler, or a large retrieval
system. For internal doc search at small scale, say so and simplify (often a managed engine is the
whole answer).
Ask once if missing: corpus scope (internal docs vs open web), target QPS, freshness SLO, build vs
buy appetite.
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.
---
## Reference architecture (adapt, do not copy blindly)
One line: a search engine is a distributed factory that turns URLs into rankable documents. It is a
chain of decisions: what to discover, fetch, store, index, retrieve, promote. Each stage kills bad
cost and keeps useful signal.
…Read the whole file at its exact version.
How to install
mdr add pierry/harness-kit/search-engine@sha256:ad0a2325be146f68The 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_htz2yjlh3r3mod73)
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 (8635 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_htz2yjlh3r3mod73 GET https://markdownregistry.com/api/v1/resolve?ref=pierry/harness-kit/search-engine GET https://markdownregistry.com/api/v1/blob/ad0a2325be146f68ff8293dbf89a319df641413314e7f0066538ebb7747dd224
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.