// writing

Thoughts on code,
craft & exploration.

A mix of technical deep-dives, career reflections, and dispatches from the road.

Network Tokenization: Why the Card Number in Your Wallet Isn't Your Card Number thumbnail

financeOct 21, 2026· 4 min

Network Tokenization: Why the Card Number in Your Wallet Isn't Your Card Number

Network tokens swap your 16-digit card number for a merchant- or device-bound stand-in plus a one-time cryptogram. Here's how the vault, the token, and the cryptogram fit together, and why issuers approve more of them.

Mermaid Diagrams in Obsidian: Architecture Docs That Live Next to Your Notes thumbnail

obsidianOct 20, 2026· 4 min

Mermaid Diagrams in Obsidian: Architecture Docs That Live Next to Your Notes

Obsidian renders Mermaid out of the box, so flowcharts, sequence diagrams, and state machines can live as plain text in your vault, link to your notes, and diff cleanly in git.

React Fragment Refs: Attach Behavior Without the Wrapper Div thumbnail

developmentOct 19, 2026· 4 min

React Fragment Refs: Attach Behavior Without the Wrapper Div

React 19.3 made Fragment refs stable. Here's how FragmentInstance lets you listen, observe, and move focus across a group of elements without adding a wrapper div or touching child components.

CSS Gap Decorations: Divider Lines Without the Border Hacks thumbnail

developmentOct 18, 2026· 4 min

CSS Gap Decorations: Divider Lines Without the Border Hacks

Chrome and Edge 149 let column-rule and the new row-rule draw lines in grid and flexbox gaps, so you can delete the border and pseudo-element tricks you've been maintaining.

Position Sizing: The Risk Decision That Matters More Than Your Entry thumbnail

financeOct 17, 2026· 5 min

Position Sizing: The Risk Decision That Matters More Than Your Entry

How much you put into a trade quietly decides whether you survive a losing streak. Here is the math behind fixed fractional sizing, the 1% rule, and why practitioners cut the Kelly criterion in half.

Obsidian Keychain: Get Your API Keys Out of data.json thumbnail

obsidianOct 16, 2026· 4 min

Obsidian Keychain: Get Your API Keys Out of data.json

Obsidian's Keychain gives plugins one shared, device-local place to keep API keys instead of plaintext in data.json. Here's how it works, what it fixes, and where it still trips people up.

Svelte Error Boundaries: Contain the Crash Instead of Losing the Page thumbnail

developmentOct 15, 2026· 4 min

Svelte Error Boundaries: Contain the Crash Instead of Losing the Page

One flaky widget shouldn't blank your whole app. Here's how Svelte's boundary element walls off failures, shows loading UI for await, and now works during server rendering too.

Perpetual Futures: How Funding Rates Keep a Contract With No Expiry Honest thumbnail

financeOct 14, 2026· 5 min

Perpetual Futures: How Funding Rates Keep a Contract With No Expiry Honest

Perpetual futures are the most traded product in crypto, and they never expire. Here's how the funding rate keeps them pinned to spot, what it costs to hold one, and why leverage makes the math unforgiving.

Obsidian Quick Capture on iOS: Stop Losing Thoughts to the Loading Screen thumbnail

obsidianOct 13, 2026· 4 min

Obsidian Quick Capture on iOS: Stop Losing Thoughts to the Loading Screen

Obsidian's native Quick Capture for iOS 26 lets you jot a note from the Lock Screen, Control Center, or Shortcuts without waiting for your vault to load. Here's how Locations, templates, and widgets fit together.

Dependency Cooldowns: Make Your Package Manager Wait Before It Trusts New Code thumbnail

developmentOct 12, 2026· 4 min

Dependency Cooldowns: Make Your Package Manager Wait Before It Trusts New Code

npm, pnpm, Yarn, and Bun can all refuse package versions that are only hours old. Here's how each one's release-age gate works, why the units don't match, and where it bites in CI.

// the newsletter

Don't miss the next one