Caching and downsampling images in Swift
A Swift image cache keyed by URL alone hands the list screen whatever size the details screen asked for first. Cache the Data instead, and downsample per size.
Continuum Blog12 min read
Roland Leth
20 stories
What building with AI changed about how I work
Working with Claude Code since the spring: I type much less and decide much more. Where the deciding lands, what it costs, and what I'd tell someone starting.
Continuum Blog4 min readThe model won’t question your premise
Claude Code will test, review and argue, but it won't ask whether the premise is right. Six careful rounds on a wrong assumption, and how I get at premises now.
Continuum Blog4 min readThe model will tell you it worked when it didn’t
Claude Code's report of what it did is a claim, not a result: a feature that counted attempts as submissions, why it's hard to catch, and what I verify now.
Continuum Blog3 min readEverything the model forgets between sessions
Claude Code starts every session with the code and none of the decisions behind it. What that memory gap costs, and the routines that write down what happened.
Continuum Blog4 min readThe model will hand you a confident plan for anything
Claude Code's plans arrive finished-looking, and a considered choice reads like an arbitrary one. Why I decide before it writes, and the 4-word question I ask.
Continuum Blog7 min readClaude Code rules, hooks and skills, and how I set mine up
Claude Code's three places to shape how it works: rules for prose it reads, skills for procedures, hooks for what must run every time. Which one to reach for.
Continuum Blog7 min readWhat changed my mind about building with AI
Why I gave building with AI a proper second try, the 2 apps and a site that came out of it, and what sits around the model: rules, memory, who decides.
Continuum Blog3 min readThe tools that keep me out of the admin
How I publish without the admin: posts are markdown files in a repo with title and slug frontmatter, projects are a manifest, and a script imports them.
Continuum Blog5 min readWhat I'd do differently
Closing the Next.js series: which over-engineered defenses earned their keep as patterns, the ones I'd reach for again, and what I'd revisit on a do-over.
Continuum Blog5 min readThree markdown pipelines and a theme toggle
Three markdown pipelines in Next.js: React with highlighting, feed HTML, plain text for meta. And the theme-toggle bug that taught me useSyncExternalStore.
Continuum Blog8 min readThree surprises about server components
Three Next.js server-component behaviors I shipped bugs on: Link prefetches every visible row, Link on mailto and static files, unstable_cache assumes JSON.
Continuum Blog6 min read200 markdown posts and the future-dated content puzzle
Scheduled posts in Next.js with unstable_cache: why a future-dated WHERE clause has two bugs, how the cache stays correct as now moves, and a catch-all route.
Continuum Blog7 min readThe admin write contract
What every write in this Next.js admin goes through: an audit log, optimistic mutations and their small horrors, a return-type discriminant, one isAbortError.
Continuum Blog7 min readInput validation and logs that don't leak
Zod validation at a Next.js API boundary that logs the failing field's path, never its value, a magic-byte MIME sniff for uploads, and a log-string sanitizer.
Continuum Blog6 min readAuth for a single-user site, without NextAuth
Single-user auth in Next.js without NextAuth: a jose-signed session JWT, bcrypt with a dummy hash, per-IP rate limiting on Upstash, and pseudonymized IPs.
Continuum Blog7 min readThe shape of a Next.js app
How I structured a single-user Next.js site: server components by default, Prisma and Zod at the edges, 200 lines of auth by hand, Tailwind only.
Continuum Blog5 min readSync build versions between targets
I've been working for a while on a new project (stay tuned!) which has a watch app. Up until now I used a script that automatically increases the build number of the app, based on the value in `Info.plist`:
Continuum Blog2 min read
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