backend SKILL.md skillA
backend from yuecao365/offercome is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yuecao365/offercome/backend@git:20260920.a4843f5Pins git:20260920.a4843f5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yuecao365/offercome
- Path
src/lib/mock-interviews/skills/backend/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260920.a4843f5, committed Sep 20, 2026
- First version recorded
- Aug 17, 2026
- Size
- 10,668 bytes
- Repository stars
- 24
- License
- MIT
后端怎么面（栈无关）：缓存、消息队列、接口、可靠性、可观测、容量、发布。服务端岗读。.
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
## 面试官在意什么 后端工程师（服务端开发、Backend Engineer）的日常是把业务需求变成稳定、可扩展、可排查的线上服务：设计接口与数据模型、处理并发与一致性、接缓存与队列、盯监控与告警、扛流量高峰、处理线上故障。真实面试里，不论候选人写 Java、Go 还是 Python，被反复追问的都是同一批东西：数据怎么存、怎么读快、怎么写不丢、挂了怎么办、怎么知道它挂了、流量翻十倍先崩哪里。面试官最在意三件事：一是候选人能否说清自己系统里每个组件"为什么在那里"，而不是"大家都这么搭"；二是有没有真实的线上排查经历——从告警到根因的完整链路；三是对一致性、可用性、成本、复杂度之间的取舍有没有自己的判断，而不是背 CAP。 校招侧重基础：HTTP 与 RPC 的差别、缓存的基本用法、事务与锁、能否把一个简单业务拆成合理的表和接口，重点看思路是否清晰、能否被追问推着往下想。社招侧重工程判断：给一个具体故障或容量问题，看排查顺序、看有没有量化（QPS、P99、连接数、命中率）、看方案里有没有回滚与降级。一线大厂与外企近年更倾向于"场景推演"：给一个业务描述，让候选人现场设计并解释每个决定，纯名词题（"说说 Redis 的数据结构"）占比越来越低。 怎么问才像这个方向的面试官： - 栈无关：本包只考人人必会的基础；语言细节、数据库内核、分布式一致性的深挖各在细节包里（java、go、mysql-internals、distributed-systems 等），JD 或简历落在上面时再读。 - 2026 年后端面试多了一条线：服务里接了大模型或 Agent 的候选人，会被追怎么给非确定性的调用做超时、重试、幂等、成本预算与缓存，和传统下游一视同仁的算没想过。 - 每道题必须有数字：候选人说了任何架构决策，追 QPS、数据量、延迟、机器数，用规模检验方案是否过度设计或设计不足。 - 优先考故障与取舍：不问"X 是什么"，问"X 坏了长什么样""为什么不用更简单的 Y"。 - 结合候选人项目规模出题：日活几千的项目不问分库分表，日活千万的项目必须追容量、降级与变更管理。 ## 项目 / 实习怎么深挖 简历上出现下面这类经历时从哪里切、追什么。追到候选人能说出机制、数字的来源与一次真实的故障或取舍才算实；只有框架名与结论、说不出自己那一段的，记为危险信号。通用的追问方法见 project-deep-dive。 - 简历出现"高并发" → 追具体 QPS、P99、机器数、瓶颈在哪一层、压测怎么做的；说不出数字的要标记 - 简历出现 Redis → 追缓存了什么、命中率、大 key/热 key 怎么处理、Redis 挂了系统会怎样、有没有出过缓存一致性事故 …
Read the whole file at its exact version.
How to install
mdr add yuecao365/offercome/backend@sha256:c9cd0a19f3943e88The line at the top of this page pins the label git:20260920.a4843f5, 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_3ccqvnuco2yumor4)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Aug 17, 2026 and Sep 20, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260920.a4843f5 latest | 2026-09-20 | a4843f5 | 10,668 B | A | view · diff |
| git:20260919.2ea5304 | 2026-09-19 | 2ea5304 | 12,808 B | A | view · diff |
| git:20260908.a2a662c | 2026-09-08 | a2a662c | 15,428 B | A | view · diff |
| git:20260817.f3a9563 | 2026-08-17 | f3a9563 | 2,236 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 (10668 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
yuecao365/offercome · 24 stars · license MIT · pushed 2026-10-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3ccqvnuco2yumor4 GET https://markdownregistry.com/api/v1/resolve?ref=yuecao365/offercome/backend GET https://markdownregistry.com/api/v1/blob/c9cd0a19f3943e885f52d4b71c9800936ba2973f9e88adb54f78519f027f2b85
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 yuecao365/offercome
Every file in yuecao365/offercome