AutoGineer summary
Written by AutoGineer from the skill’s own files, not by the author
This skill guides the integration of PostHog log capture into various application stacks. It automates the setup of OTLP exporters and provides instructions for adding structured logging alongside existing application logs. The skill ensures that log events are captured with meaningful properties, facilitating better observability and debugging within the PostHog platform.
What it does
- Detects the application platform and existing logging infrastructure.
- Configures the OpenTelemetry (OTLP) exporter for PostHog ingestion.
- Integrates PostHog log capture without replacing existing logging handlers.
- Ensures logs are captured with structured key-value properties.
- Manages environment variable configuration for API tokens and host URLs.
- Provides platform-specific guidance for SDK-native log capture.
When to use it
- After implementing new features that require observability.
- During code reviews when you identify a need for better log coverage.
- When setting up initial log export for a new project.
- When migrating from standard logging to structured, centralized log management.
Advantages
- Maintains existing logging architecture without disruptive changes.
- Supports a wide range of languages and frameworks via OpenTelemetry.
- Enables structured logging for improved search and filtering in PostHog.
- Automates the configuration of environment variables and ingestion endpoints.
Usage examples
- “Add PostHog log capture to my Node.js application.”
- The agent will analyze your package.json, install necessary OpenTelemetry dependencies, configure the OTLP exporter, and guide you through adding PostHog logging calls to your code.
- “I need to start tracking logs in my Android app using PostHog.”
- The agent will verify your Android SDK setup, configure the PostHogAndroidConfig for logs, and show you how to use PostHog.logger to capture structured events.
Install
Download the skill as a ZIP:
https://autogineer.com/agent-skills/posthog/instrument-logs/downloadUnzip it into the cross-client skills folder of your project:
mkdir -p .agents/skills && unzip instrument-logs.zip -d .agents/skills
Documentation by PostHog
Add PostHog log capture
Use this skill to add PostHog log capture for new or changed code. Use it after implementing features or reviewing PRs to ensure meaningful log events are captured with structured properties. If PostHog log export is not yet configured, this skill also covers initial OTLP exporter setup. Supports any platform or language.
Supported platforms: Next.js, Node.js, Python, Go, Java, Datadog, Android, React Native, iOS, and any language via OpenTelemetry.
Instructions
Follow these steps IN ORDER:
STEP 1: Analyze the codebase and detect the platform.
Detect the language, framework, and existing logging setup.
Look for dependency files and project files (package.json, Podfile, Package.swift, requirements.txt, go.mod, pom.xml, etc.).
Look for log libraries (winston, pino, logging module, logrus, log4j, serilog, os_log, Logger, etc.).
Look for lockfiles (pnpm-lock.yaml, package-lock.json, yarn.lock, bun.lockb, go.sum, Podfile.lock, Package.resolved, etc.) to determine the package manager.
Check for existing PostHog log export setup. If the OTLP exporter is already configured, skip to STEP 5 to add log capture for new code.
STEP 2: Research log capture. (Skip if PostHog log export is already configured.) 2.1. Find the reference file below that matches the detected platform — it is the source of truth for OTLP exporter configuration and integration with existing logging. Read it now. 2.2. If no reference matches, use the "Other Languages" reference as a fallback — it covers the generic OpenTelemetry approach.
STEP 3: Install dependencies. (Skip if PostHog log export is already configured.)
Install the OpenTelemetry SDK and OTLP exporter packages for the detected platform.
Do not manually edit dependency files — use the package manager's install command.
STEP 4: Configure the OTLP exporter. (Skip if PostHog log export is already configured.)
PostHog logs use the OpenTelemetry protocol. Set up an OTLP exporter pointed at PostHog's ingest endpoint.
For SDK-native log support such as Android, React Native, and iOS, follow the platform reference instead of adding a separate OTLP exporter.
Follow the platform-specific reference for the exact configuration.
STEP 5: Integrate with existing logging.
Add the PostHog log exporter alongside existing logging. Don't replace existing log handlers or outputs.
Do not alter the fundamental architecture of existing files. Make additions minimal and targeted.
You must read a file immediately before attempting to write it.
STEP 6: Add structured properties.
Ensure logs include structured key-value properties for filtering and search in PostHog.
Prefer structured log formats with key-value properties over plain text messages.
STEP 7: Set up environment variables.
Check if the project already has PostHog environment variables configured (e.g. in
.env,.env.local, or framework-specific env files). If valid values already exist, skip this step.If the PostHog project token is missing, use the PostHog MCP server's
projects-gettool to retrieve the project'sapi_token. If multiple projects are returned, ask the user which project to use. If the MCP server is not connected or not authenticated, ask the user for their PostHog project token instead.For the PostHog host URL: check the
projects-getMCP response for aregionfield —USmaps tohttps://us.i.posthog.com,EUmaps tohttps://eu.i.posthog.com. If the region is not available from the MCP response or from existing project configuration, ask the user: "Are you on PostHog US Cloud or EU Cloud?" Do not assume US Cloud.For the OpenTelemetry endpoint, use
https://us.i.posthog.com/v1(US) orhttps://eu.i.posthog.com/v1(EU), matching the region determined above.Write these values to the appropriate env file using the framework's naming convention.
Reference these environment variables in code instead of hardcoding them.
Reference files
references/nextjs.md- Next.js logs installationreferences/nodejs.md- Node.js logs installationreferences/python.md- Python logs installationreferences/go.md- Go logs installationreferences/java.md- Java logs installationreferences/datadog.md- Datadog logs installationreferences/android.md- Android logs installationreferences/react-native.md- React native logs installationreferences/ios.md- Ios logs installationreferences/flutter.md- Flutter logs installationreferences/other.md- Other languages logs installationreferences/start-here.md- Getting started with logsreferences/search.md- Search logsreferences/best-practices.md- Logging best practicesreferences/troubleshooting.md- Logs troubleshootingreferences/link-session-replay.md- Link session replayreferences/mcp.md- Use logs over PostHog mcpreferences/COMMANDMENTS.md- Framework-specific rules the integration must follow
Each platform reference contains specific OTLP configuration, SDK setup, and integration patterns. Find the one matching the user's stack.
Key principles
Environment variables: Always use environment variables for PostHog keys and OpenTelemetry endpoints. Never hardcode them.
Minimal changes: Add log export alongside existing logging. Don't replace or restructure existing logging code.
OpenTelemetry: PostHog logs use the OpenTelemetry protocol. Configure an OTLP exporter pointed at PostHog's ingest endpoint unless the platform SDK provides native log capture.
SDK-native logs: For Android, React Native, and iOS, use the SDK logger/capture APIs from the platform reference instead of adding a separate OTLP exporter.
Structured logging: Prefer structured log formats with key-value properties over plain text messages.
Files
- ATTRIBUTION.mdAdded by AutoGineer931 B
- LICENSELicence file added by AutoGineer1.0 KiB
- SKILL.md6.1 KiB
- references/COMMANDMENTS.md1.5 KiB
- references/android.md9.2 KiB
- references/best-practices.md25.2 KiB
- references/datadog.md3.8 KiB
- references/flutter.md20.4 KiB
- references/go.md4.9 KiB
- references/ios.md11.1 KiB
- references/java.md4.7 KiB
- references/link-session-replay.md6.4 KiB
- references/mcp.md4.1 KiB
- references/nextjs.md6.9 KiB
- references/nodejs.md4.8 KiB
- references/other.md3.5 KiB
- references/python.md4.7 KiB
- references/react-native.md10.8 KiB
- references/search.md8.0 KiB
- references/start-here.md10.2 KiB
- references/troubleshooting.md6.5 KiB
references/datadog.md
AI agents: this is one page from PostHog's docs. Full index of Markdown docs for LLMs: https://posthog.com/llms.txt
Datadog Logs installation
Canonical URL: https://posthog.com/docs/logs/installation/datadog
Cloud region: This page uses US Cloud hosts. For an EU Cloud project, use
https://eu.i.posthog.cominstead ofhttps://us.i.posthog.com(ingestion host), and usehttps://eu.posthog.cominstead ofhttps://app.posthog.com(app host for links).
On this page
Get your project token
Configure Datadog Agent
Other Datadog log exporters
Test your setup
Next steps
If you're already using Datadog to collect logs, you can forward them to PostHog by configuring your existing Datadog log exporters (like the Datadog Agent) to send logs to PostHog's Datadog-compatible endpoint.
1
Get your project token
Required
You'll need your PostHog project token to authenticate log requests. This is the same key you use for capturing events and exceptions with the PostHog SDK.
Important: Use your project token which starts with
phc_. Do not use a personal token (which starts withphx_).You can find your project token in Project Settings.
2
Configure Datadog Agent
Required
Set the Datadog logs URL to point to PostHog's Datadog-compatible endpoint. The endpoint format is:
https://us.i.posthog.com/i/v1/logs/datadog/<ph_project_token>For the Datadog Agent, set the
DD_LOGS_CONFIG_LOGS_DD_URLenvironment variable:export DD_LOGS_CONFIG_LOGS_DD_URL="https://us.i.posthog.com/i/v1/logs/datadog/<ph_project_token>"Alternatively, you can set this in your
datadog.yamlconfiguration file:logs_config: logs_dd_url: "https://us.i.posthog.com/i/v1/logs/datadog/<ph_project_token>"3
Other Datadog log exporters
Optional
If you're using other Datadog log exporters or forwarders, configure them to send logs to the same endpoint:
https://us.i.posthog.com/i/v1/logs/datadog/<ph_project_token>The endpoint accepts logs in the standard Datadog log format, so existing integrations should work without additional changes.
4
Test your setup
Recommended
Once everything is configured, test that logs are flowing into PostHog:
Restart the Datadog Agent (or your log forwarder) to apply the configuration
Generate some log entries in your application
Check the PostHog Logs interface for your log entries
Verify the logs appear in your project
Next steps
Checkpoint
What you can do with your logs
Action Description Why you need logs What logs show you that nothing else does Search logs Use the search interface to find specific log entries Filter by level Filter by INFO,WARN,ERROR, etc.Link session replay Connect logs to users and session replays by passing posthogDistinctIdandsessionIdLink logs to a person Surface every log emitted on behalf of a user on their PostHog person profile Logging best practices Learn what to log, how to structure logs, and patterns that make logs useful in production
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, Needs Python, Needs Node.js
Security
What our scanner noticed· Low risk
- Instructions that use the network
A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.
Attribution and licence
- Created by
- PostHog
- Publisher
- PostHog (Official)
- Source
- PostHog/skills · skills/omnibus/instrument-logs · commit a5d30e7
- Licence
- MIT License (redistribution allowed)
- LICENSE (added by AutoGineer from LICENSE)
- ATTRIBUTION.md (written by AutoGineer)
- Synced
AutoGineer is not affiliated with or endorsed by PostHog or PostHog.
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Download ZIP
The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download instrument-logs.zip