The Builder CoilThe Builder Coil

A Builder's Grimoire for Modern Development

Devlogs, experiments, and lessons learned from buildingChronomation and running Ball Lightning AB. Engineering card advantage in real life.

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Recent devlogs and updates

An infrastructure diagram showing Better Auth integration, Creem billing setup, Resend email configuration, and the shipping.apidojo.app domain foundation
Shipping API DojoBetter AuthCreem

Auth Foundation: Building Better Auth, Creem Billing, and Email Infrastructure for Shipping API Dojo v2

Issue #11 completed the auth, entitlements, billing, email, and domain foundation for Shipping API Dojo v2. Better Auth, Creem, Resend, and the shipping.apidojo.app domain came together.

April 17, 20267 min read
A technical blueprint document showing content-family data models, seeded randomization strategy, and the auth/billing/email/domain architecture stack
Shipping API DojoTechnical ArchitectureData Modeling

Technical Scoping: How Shipping API Dojo v2 Designed Its Content-Family Foundation

Before building Shipping API Dojo v2, I needed a complete technical blueprint. I scoped content families, seeded randomization, auth/billing/email/domain strategy, and the decisions that shaped the architecture.

April 16, 20268 min read
A clean architectural diagram showing the v2 stack with TanStack Start, Neon Postgres, Better Auth, Creem billing, and content-family data models
Shipping API DojoTanStack StartArchitecture

Shipping API Dojo v2: A Foundation for Randomized Learning at Scale

The massive v2 rebuild of Shipping API Dojo introduces content families, seeded randomization, and a full auth/billing foundation. Here's the architecture and vision behind the 20/20/20 curriculum expansion.

April 13, 20267 min read
A workflow audit board with dependency PRs, a terminal, a lockfile diff, and a JSON-to-JSONL migration note
DependabotCodexDeveloper Workflow

What a Day of Dependabot PRs Taught Me About Hidden State, Codex Sandboxes, and Avoiding User-Specific Installs

A day that started with routine dependency PRs turned into a workflow audit: lockfile repair, sandbox debugging, MCP memory migration, and a stronger rule to avoid user-specific installs and hidden local state.

March 16, 20268 min read
AI coding assistant with skills files flowing into multiple IDE icons
SkillsCodexWindsurf

Skill Refresh: How I Pruned My AI Skills Stack and Aligned Windsurf with Codex

How I reviewed my AI skill library, archived the overlap, refreshed the keepers, and standardized rules and workflows between Windsurf and Codex.

March 10, 20267 min read
Layered cards showing technology stacks connected across projects
TechnologiesWeb DevelopmentTechnical Communication

Connecting the Dots: How I Built the Technologies Page and Tightened Performance

How I shipped the new Technologies page, wired services → technologies → portfolio links, and folded in the latest performance audit fixes for Ball Lightning.

February 28, 20266 min read

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