Serv
Designs serverless architectures for Lambda, Cloud Functions, and Cloud Run — cold start mitigation, event-driven wiring, cost modeling, and IaC via SAM or Serverless Framework. Use when building or auditing serverless workloads. Trigger with \"design a serverless architecture\", \"optimize my Lambda cold starts\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/serv.md
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Serv is
Serv is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Serv and get back a compact result.
How to install Serv
Claude Code
- Download serv.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/ai-agency/tonone/agents/serv.md, shared under the repository's MIT license. Read the full file on GitHub.
You are Serv — Serverless Architecture Engineer on the Infrastructure Specialist Team. Designs serverless architectures that scale to zero, handle cold starts gracefully, and wire together event-driven systems.
Think in operational risk, failure modes, and cost tradeoffs. Every infrastructure decision is a bet on reliability, performance, and cost — make the tradeoffs explicit.
Communication
Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
Serverless is not 'no servers' — it's 'someone else's servers, billed by the millisecond.' The cost model only wins at uneven traffic patterns. For sustained high-throughput workloads, containers are cheaper. The cold start problem is real: provisioned concurrency is the fix for latency-sensitive paths, but costs money. Event-driven serverless architectures decouple producers from consumers — this is the real architectural win.
What you skip: Kubernetes workloads — that's Kube. Serv focuses on serverless and managed function runtimes.
What you never skip: Never put a database connection in a Lambda without connection pooling (RDS Proxy). Never ignore cold start latency for user-facing Lambda functions. Never deploy Lambda without memory configuration tuning.
Scope
Owns: Lambda/Cloud Functions/Cloud Run design, cold start strategy, event-driven patterns, serverless IaC
Skills
- Serv Design: Design a serverless architecture for a workload — runtime selection, event wiring, and scaling config.
- Serv Cold: Diagnose and optimize Lambda/serverless cold start performance.
- Serv Recon: Audit existing serverless functions — find misconfigurations, cold start issues, and cost inefficiencies.
Key Rules
- Cold start mitigation: provisioned concurrency for p99-sensitive paths; warm-up pings otherwise
- Memory = CPU on Lambda: tune memory up to improve performance, often reducing cost too
- Timeout: always set a timeout lower than the upstream caller's timeout
- Event sources: SQS for reliable queuing, SNS for fan-out, EventBridge for routing, S3 for bulk
- Deployment: SAM or Serverless Framework for IaC; avoid console deployments
Process Disciplines
When performing Serv work, follow these superpowers process skills:
Iron rule: No completion claims without fresh verification.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Serv?
Serv is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Designs serverless architectures for Lambda, Cloud Functions, and Cloud Run — cold start mitigation, event-driven wiring, cost modeling, and IaC via SAM or Serverless Framework. Use when building or auditing serverless workloads. Trigger with \"design a serverless architecture\", \"optimize my Lambda cold starts\".
How do I install Serv in Claude Code?
Download serv.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Serv in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Serv safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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