systematic-debugger

Subagent "systematic-debugger" from PostHog/posthog: Use this agent when you need to diagnose and fix bugs, errors, or unexpected behavior in code.

Template by PostHog

IndexedNOASSERTION★ 40,411

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Install

Works with Claude Code. Read the repository before you give any tool access to your data.

curl -fsSL https://raw.githubusercontent.com/PostHog/posthog/master/.claude/agents/systematic-debugger.md -o systematic-debugger.md

Read it and adapt it to your project before use.

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About

A Claude Code subagent definition in PostHog/posthog. Its description says: Use this agent when you need to diagnose and fix bugs, errors, or unexpected behavior in code. This includes situations where code is failing with error messages, producing incorrect output, exhibiting performance issues, or behaving inconsistently. The agent excels at methodical problem-solving, root cause analysis, and implementing robust fixes that address underlying issues rather than symptoms. This agent writes a `CODE_DEBUGGING_SESSION.md` report in the project's root folder. Examples: <example> Context: User encounters an error in their application user: "My function is throwing a TypeE Model: opus.

Use cases: debugging

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What's in it

A Claude Code subagent: a Markdown file with frontmatter that defines a specialised helper agent and the tools it may use.

For: Claude Code
Length: 42 lines
File: .claude/agents/systematic-debugger.md
name: systematic-debugger
model: opus
description: Use this agent when you need to diagnose and fix bugs, errors, or unexpected behavior in code. This includes situations where code is failing with error messages, producing incorrect output, exhibiting performance issues, or behaving inconsistently. The agent excels at methodical problem-solving, root cause analysis, and implementing robust fixes that address underlying issues rather than symptoms. This agent writes a `CODE_DEBUGGING_SESSION.md` report in the project's root folder.\n\nExamples:

Sections

Core Process
When Stuck (After 3 Attempts)
Best practices
Output Structure

The repository's license isn't open source, so the text isn't shown here. Read it on GitHub.

Signals

Stars: 40,411
Forks: 3,551
Open issues: 3,850
Contributors: 596
Last commit (this folder): Sep 1, 2026 (1 month ago)
Last release: Oct 24, 2026 (4 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License: NOASSERTION
Repository: github.com/PostHog/posthog
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: GitHub github-graphql