John Boxall

CTO @SuperpilotAI. Previously CTO @mobify, acquired by Salesforce. Underground purveyor of the finest ASCII art and rarest emoji. Dad.

[John Boxall @johnboxall]

Incredibly proud of the @Mobify team! 🙏 @Mobify signs a definitive agreement to be acquired by @Salesforce: https://t.co/hfdp7WS3HP

[John Boxall @johnboxall]

Switched to @zeddotdev two weeks ago after their 1.0. Was interested in speed and got it. Started off by disabling all AI features in editor and using it to tweak/review output from Claude. So far so good!

[John Boxall @johnboxall]

"almost done thinking"

[John Boxall @johnboxall]

Claude-y baby, read my shell history and create me shortcuts for my most used commands also print me a cheat sheet

[John Boxall @johnboxall]

@randomfrequency @Cloudflare Can't choose the CDN customers use unfortunately and it is hard baked into Shopify / Salesforce B2C Commerce.

[John Boxall @johnboxall]

If I want to use @Cloudflare to reverse proxy a folder then I _must_ either a) use workers b) have an Enterprise account to set Origin Rules / Page Rule Host headers? Why is this so hard!? Am I missing a doc that explains this?

[John Boxall @johnboxall]

If you don't want to work against the constraints of the Anthropic APIs you must keep your system prompt and tools fixed across sessions. Push customer specific instructions down and design around not changing tools.

[ClaudeDevs @ClaudeDevs]

Useful tip to cut time-to-first-token on longer prompts in the API: pre-warm the prompt cache.

Send your system prompt before the user prompt. Claude writes it to the cache, but skips generating any output.

When the real user request lands, it'll hit a warm cache.

[John Boxall @johnboxall]

Have you really lived if you haven't used AsyncLocalStorage.

[John Boxall @johnboxall]

Much better results much faster on large refactors with Claude prompted to "use codemods".

[John Boxall @johnboxall]

If Claude tries to tell you it’s a “belt and suspenders” approach you know you’re about to see some grade A garbage code.

[John Boxall @johnboxall]

Thanks for letting me know Google meet 🫡

[John Boxall @johnboxall]

@tirellat @Shopify I did – the specific answers don't exist in the docs and what is in the docs only includes a subset of the behaviour. Perhaps this is intentional in that the unspecified behaviour is considered internal / private but it would be good to say so!

[John Boxall @johnboxall]

I'm always curious about behaviour of HTTP proxy features in web apps. @Shopify's App Proxy forwards HTTP requests to app defined origin. Docs are light on constraints – connect / read timeouts, response size, Shopify added headers (x-shopify) – any authoritative sources on this?

[John Boxall @johnboxall]

@randomfrequency @claudeai Claude Code on the Web doesn't have `gh` (at least for us?) so I had a startup script that injected a PAT and told it sternly "YOU DONT HAVE `gh` SO U MUST USE THE API w/ THIS TOKEN". Glad to remove that. Would be nice if the docs mentioned it tho.

[John Boxall @johnboxall]

It _seems_ like @claudeai Code on the Web added GitHub MCP tools by default. At last, it can read my GitHub issues and check CI!

[John Boxall @johnboxall]

Chrome split view ... never again! *SHAKES FIST*

[John Boxall @johnboxall]

@jvaill I remember looking at the source for your GBA emulator on GitHub and thinking “we gotta talk to this guy!”

[sunil pai @threepointone]

code mode: let the code do the talking

(aka, after w/i/m/p)

wherein I ponder the implications of every user having a little coding buddy, and every "app" being directly programmable on demand.

https://t.co/i62HuWsjKg

lmk what you think.

[John Boxall @johnboxall]

@sintaxi (opencode too!) but I am a poor simple creature of habbits 🙃 next time I run into a wall of 429s, I'll give it another go.

[John Boxall @johnboxall]

Still longing for a omnipresent context window % used in Claude Code!

[John Boxall @johnboxall]

With Anthropic server tools web search / fetch, I find it necessary to include the # of allowed domains & calls in the prompt to avoid tool call errors. Is it just me running into this?