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Scarab Systems

Building Scarab Diagnostic Suite: repo-local diagnostics + repair for AI-assisted development. Writing about repo truth, drift surfaces, entropy, agent workflows, and verification.

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Creator of Scarab Diagnostic Suite

Scarab Diagnostic Field Test #025 — VS Code Mouse Echo Runtime Configuration Boundary

Scarab Diagnostic Field Test #025 — VS Code Mouse Echo Runtime Configuration Boundary

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6 min read

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Scarab Diagnostic Field Test #024 — pnpm CAFS TMPDIR Socket Budget Boundary

Scarab Diagnostic Field Test #024 — pnpm CAFS TMPDIR Socket Budget Boundary

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5 min read
Scarab Field Lab Is Public: A Case File Repo for Diagnostic Field Tests

Scarab Field Lab Is Public: A Case File Repo for Diagnostic Field Tests

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5 min read
The Real AI Coding Breakthrough Is Not More Context. It Is Better Diagnostics.

Distinguishing repo 'drift' from failure

The Real AI Coding Breakthrough Is Not More Context. It Is Better Diagnostics.

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12 min read
Scarab Diagnostic Field Test #023 — Rust Raw Pointer Recursive Layout Boundary

Scarab Diagnostic Field Test #023 — Rust Raw Pointer Recursive Layout Boundary

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3 min read
Scarab Diagnostic Field Test #022 — Playwright Worker Response Header Hang

Scarab Diagnostic Field Test #022 — Playwright Worker Response Header Hang

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3 min read
Scarab Diagnostic Field Test #021 — pnpm Self-Upgrade No-Manifest Boundary

Scarab Diagnostic Field Test #021 — pnpm Self-Upgrade No-Manifest Boundary

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4 min read
Scarab Diagnostic Field Test #020b — Next.js Root Ownership Refinement

Scarab Diagnostic Field Test #020b — Next.js Root Ownership Refinement

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2 min read
Scarab Diagnostic Field Test #020 — Next.js Turbopack Root Inference Boundary

Scarab Diagnostic Field Test #020 — Next.js Turbopack Root Inference Boundary

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4 min read
Scarab Diagnostic Field Test #019 — Docker Compose Config Variable Discovery Boundary

Scarab Diagnostic Field Test #019 — Docker Compose Config Variable Discovery Boundary

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2 min read
Scarab Diagnostic Suite Field Test #017: Node.js Readline Line-Separator Boundary

Scarab Diagnostic Suite Field Test #017: Node.js Readline Line-Separator Boundary

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3 min read
The Bug Usually Starts Before the Error

The Bug Usually Starts Before the Error

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2 min read
Scarab Diagnostic Suite Field Test #016: Microsoft/TypeScript Auto-Import Package Boundary

Scarab Diagnostic Suite Field Test #016: Microsoft/TypeScript Auto-Import Package Boundary

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2 min read
Scarab Diagnostic Suite Field Test #015: Facebook/React Compiler Non-Null Assertion Boundary

Scarab Diagnostic Suite Field Test #015: Facebook/React Compiler Non-Null Assertion Boundary

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2 min read
The Debugging Should Start Before The Bug.

The Debugging Should Start Before The Bug.

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2 min read
Scarab Diagnostic Suite Field Test #014: Deno Stdin Stream Resource Boundary

Scarab Diagnostic Suite Field Test #014: Deno Stdin Stream Resource Boundary

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2 min read
Scarab Diagnostic Suite Field Test #013: Kubernetes Watch Cache Critical-Section Boundary

Scarab Diagnostic Suite Field Test #013: Kubernetes Watch Cache Critical-Section Boundary

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2 min read
Scarab Diagnostic Suite Field Test #012: Next.js Source Map Provenance Boundary

Scarab Diagnostic Suite Field Test #012: Next.js Source Map Provenance Boundary

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3 min read
AI didn’t invent code drift. It made it harder to ignore.

AI didn’t invent code drift. It made it harder to ignore.

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2 min read
Scarab Diagnostic Suite Field Test #011: LangChain Structured Output Streaming Boundary

Scarab Diagnostic Suite Field Test #011: LangChain Structured Output Streaming Boundary

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3 min read
Scarab Diagnostic Suite Field Test #010: VS Code Input Geometry Boundary

Scarab Diagnostic Suite Field Test #010: VS Code Input Geometry Boundary

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2 min read
Scarab Diagnostic Suite Field Test #009: Moby Test Harness Visibility Boundary

Scarab Diagnostic Suite Field Test #009: Moby Test Harness Visibility Boundary

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2 min read
Scarab Diagnostic Suite Field Test #008: Next.js Image Optimizer Resource Boundary

Scarab Diagnostic Suite Field Test #008: Next.js Image Optimizer Resource Boundary

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2 min read
Scarab Diagnostic Suite Field Test #007: Kubernetes LIST vs WatchList Transport Boundary

Scarab Diagnostic Suite Field Test #007: Kubernetes LIST vs WatchList Transport Boundary

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2 min read
Scarab Diagnostic Suite Field Test #006: Terraform Console Panic

Scarab Diagnostic Suite Field Test #006: Terraform Console Panic

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1 min read
Scarab Diagnostic Suite Field Test #005: A Terraform Core Cache Boundary

Scarab Diagnostic Suite Field Test #005: A Terraform Core Cache Boundary

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3 min read
What kinds of repo-truth boundaries do AI coding agents miss?

What kinds of repo-truth boundaries do AI coding agents miss?

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2 min read
Scarab Diagnostic Suite Field Test #004: Build Artifact Truth Boundary in Vite

Scarab Diagnostic Suite Field Test #004: Build Artifact Truth Boundary in Vite

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5 min read
Scarab Diagnostic Suite Field Test #003: Vite Dev/Build Contract Boundary

Scarab Diagnostic Suite Field Test #003: Vite Dev/Build Contract Boundary

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2 min read
Scarab Diagnostic Suite Field Test #002: Open WebUI Retrieval Truth Boundary

Scarab Diagnostic Suite Field Test #002: Open WebUI Retrieval Truth Boundary

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3 min read
Scarab Diagnostic Suite Field Test #001: Open WebUI Azure Provider Boundary

Scarab Diagnostic Suite Field Test #001: Open WebUI Azure Provider Boundary

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2 min read
AI Code Drift in the Wild: A Scarab Diagnostic Repair Pass

AI Code Drift in the Wild: A Scarab Diagnostic Repair Pass

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2 min read
Where are AI coding agents creating the most repo drift for you?

Where are AI coding agents creating the most repo drift for you?

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1 min read
I’m Building Around the Gap Between AI Output and Repo Truth

I’m Building Around the Gap Between AI Output and Repo Truth

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2 min read
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