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Error Tracking Svelte

PostHogOfficialCreated by PostHog

  • Skill
  • Tool integration
  • Data and AI
  • MIT
  • No issues found

From the author

PostHog error tracking for Svelte
— the description by PostHog

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides guidance and best practices for implementing PostHog error tracking within Svelte and SvelteKit projects. It covers essential setup steps, including SDK initialization, environment variable management, and source map configuration to ensure stack traces are readable. The skill emphasizes non-intrusive integration, recommending that developers maintain existing error handling logic while leveraging PostHog for automated exception capture and manual boundary monitoring.

What it does

  • Guides the installation of PostHog error tracking in Svelte applications.
  • Explains how to configure source maps for clear, unminified stack traces.
  • Provides patterns for using captureException at error boundaries.
  • Outlines best practices for managing PostHog keys using environment variables.
  • Details how to set up alerts and automated issue assignment for team workflows.
  • Offers configuration tips for SvelteKit SSR compatibility.

When to use it

  • When you need to monitor runtime errors in a Svelte or SvelteKit application.
  • When you want to centralize error reporting and issue triaging in PostHog.
  • When you need to resolve minified stack traces to original source code.
  • When you want to set up automated alerts for specific error spikes or types.

Advantages

  • Maintains existing application error handling structures.
  • Enables automated exception capture alongside manual error boundary tracking.
  • Improves debugging efficiency through unminified stack traces.
  • Facilitates team collaboration with automated issue assignment and alerting.

Usage examples

“How do I set up PostHog error tracking in my SvelteKit project?”
The agent provides the steps to initialize the PostHog SDK, configure environment variables, and ensure paths.relative is set to false in svelte.config.js.
“How can I ensure my stack traces are readable in PostHog?”
The agent explains the process of uploading source maps to PostHog so that minified bundles are mapped back to your original source code.

Install

  1. Download the skill as a ZIP:

    https://mp-staging.autogineer.com/agent-skills/posthog/error-tracking-svelte/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip error-tracking-svelte.zip -d .agents/skills

Documentation by PostHog

PostHog error tracking for Svelte

This skill helps you add PostHog error tracking to Svelte applications.

Reference files

  • references/svelte.md - Sveltekit error tracking installation - docs

  • references/fingerprints.md - Fingerprints - docs

  • references/alerts.md - Send error tracking alerts - docs

  • references/monitoring.md - Monitor and search issues - docs

  • references/assigning-issues.md - Assign issues to teammates - docs

  • references/upload-source-maps.md - Upload source maps - docs

Consult the documentation for API details and framework-specific patterns.

Key principles

  • Environment variables: Always use environment variables for PostHog keys and host URLs. Never hardcode them.

  • Minimal changes: Add error tracking alongside existing error handling. Don't replace or restructure existing error handling code.

  • Autocapture first: Enable exception autocapture in the SDK initialization before adding manual captures.

  • Source maps: Upload source maps so stack traces resolve to original source code, not minified bundles.

  • Manual capture for boundaries: Use captureException() at error boundaries and catch blocks for errors that don't propagate to the global handler.

Framework guidelines

  • Set paths.relative to false in svelte.config.js — this is required for PostHog session replay to work correctly with SSR and is easy to miss

  • Use the Svelte MCP server tools to check Svelte documentation (list-sections, get-documentation) and validate components (svelte-autofixer) — always run svelte-autofixer on new or modified .svelte files before finishing

Files

references/assigning-issues.md

Assign issues to teammates - Docs

Error tracking enables you to assign issues to specific PostHog roles or teammates. This helps your team find relevant issues through filtering. You can also set up team-specific alerting to notify them when assigned issues are created or reopened.

Assign issues

You can manually assign issues as you triage them in the UI. This can be done both in the issue list and issue detail pages.

Image: Error tracking assignment UIImage: Error tracking assignment UI

  1. In your error tracking issue list, click the unassigned selector under each issue to assign it to a role or user.

  2. On the detail page of each issue, click the Assignee selector to assign it to a role or user.

Want to assign issues to a team rather than an individual teammate? You can create a role in your project settings.

Image: Error tracking role assigneesImage: Error tracking role assignees

Automatic issue assignment

You can set up automatic issue assignment through a set of rules. This can be configured in the error tracking settings using auto assignment rules.

Image: Error tracking auto assignment rulesImage: Error tracking auto assignment rules

Assignment conditions are evaluated against the properties of the exception event that created the issue. Because assignment rules are evaluated during ingestion, the stack trace (if present) will be unminified, which enables filtering on exception properties such as function name and source file.

Issues can be automatically assigned to a role or user by configuring a set of filters. These filters can be configured to match any or all of the criteria.

You can configure automatic assignment to filter on any event property in PostHog. When there are multiple values for a property, the filters return true if it matches any of the values. For example, if you have multiple exception_functions values, the filters returns true if it matches any of the functions.

Here are some common properties you can filter on:

PropertyEvent propertyDescription
Exception type$exception_typesThe type of exception(s) that occurred
Exception message$exception_valuesThe message(s) detected on the error
Exception function$exception_functionsThe function(s) where the exception occurred
Exception source$exception_sourcesThe source file(s) where the exception occurred
Exception was handled$exception_handledWhether the exception was handled by the application
Device type$device_typeThe type of device that the error occurred on
Browser$browserThe browser that the error occurred in
Current URL$current_urlThe URL that the error occurred on
Feature flag$feature_flagThe feature flag that the error occurred on

You can also set custom properties on the error tracking event to filter on. For example, setting a custom params_received property to provide more context or debug information.

Order of issue assignment rules

Issue assignment filters are evaluated in the order they are configured. They can also be reordered once created. The first filter that matches is used to assign the issue. This means you should configure the most specific filters first, and then the more general filters later.

Disabled assignment rules

Assignment rules can become disabled if an error occurs during ingestion. When a rule is disabled, a banner displays the original error message. To re-enable the rule, edit it to fix the problem and save your changes. If the issue persists, reach out to support.

Alerting based on assignment

A common use case for automatic issue assignment is to alert assignees of new issues. Once the issues are automatically assigned, you can set up alerts to notify the assignee. See the alerts guide for more information.

Create external issues

You can also create issues in external tracking systems like GitHub Issues, Linear, GitLab, or Jira.

First, set up an integration with your tracking system. Then, from an issue's details page, under External references, click Create issue.

Image: Error tracking create issue in external tracking systemImage: Error tracking create issue in external tracking system

The new issue will have a partial stack trace and a link to the issue in PostHog.

If you use another issue tracking system and would like to request it, let us know in-app.

Community questions

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Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs an MCP server

Security

No issues found by our static scan· No issues found

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Attribution and licence

Created by
PostHog
Publisher
PostHog (Official)
Source
PostHog/skills · skills/posthog/error-tracking/skills/svelte · commit a5d30e7
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced
Also distributed in
PostHog/skills

AutoGineer is not affiliated with or endorsed by PostHog.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download error-tracking-svelte.zip