# Debugging Lambda Timeouts

> Debugs AWS Lambda function timeout failures by systematically analyzing function configuration, CloudWatch logs and metrics, VPC/networking, cold starts, memory constraints, and downstream dependencies to identify root causes with actionable fixes. Use when a Lambda function is timing out or approaching its timeout limit.

- **Type:** Skill
- **Install:** `agentstack add skill-seandkendall-kiro-config-debugging-lambda-timeouts`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [seandkendall](https://agentstack.voostack.com/s/seandkendall)
- **Installs:** 0
- **Category:** [Cloud & Infrastructure](https://agentstack.voostack.com/c/cloud-infrastructure)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [seandkendall](https://github.com/seandkendall)
- **Source:** https://github.com/seandkendall/kiro-config/tree/main/skills/debugging-lambda-timeouts

## Install

```sh
agentstack add skill-seandkendall-kiro-config-debugging-lambda-timeouts
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Debugging Lambda Timeouts

## Overview

Domain expertise for systematically investigating AWS Lambda function timeout failures
by analyzing function configuration, CloudWatch logs, metrics, dependencies, cold start
patterns, and code. Identifies common causes such as insufficient timeout settings,
external service delays, database connection issues, memory constraints, and inefficient
code patterns, then provides prioritized recommendations.

## Debug a Lambda timeout

To investigate and resolve Lambda timeout issues, follow the procedure exactly.
See [Lambda timeout debugging procedure](references/lambda-timeout-debugging.md).

The procedure collects function configuration, CloudWatch metrics and logs, dependency
analysis, and cold start patterns. If Lambda code is provided, it also reviews the code
for timeout-prone patterns. Results are compiled into a structured debugging report with
prioritized recommendations.

## Troubleshooting

### Function not found

Verify the function name and region. Use `aws lambda list-functions --region `
to list available functions.

### No logs available

The function may not have been invoked recently or logging may be disabled. Check the
function's log group configuration and invocation metrics.

### Access denied errors

Verify AWS credentials have permissions for Lambda, CloudWatch Logs, and CloudWatch
Metrics. See the full procedure for details.

### Log query time range issues

If CloudWatch Logs Insights queries fail with time range errors, reduce the analysis
window or check log group retention settings. See the full procedure for details.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [seandkendall](https://github.com/seandkendall)
- **Source:** [seandkendall/kiro-config](https://github.com/seandkendall/kiro-config)
- **License:** Apache-2.0

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-seandkendall-kiro-config-debugging-lambda-timeouts
- Seller: https://agentstack.voostack.com/s/seandkendall
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.