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Posts by Jamie Matthews

Thanks for reading! Of course all the repos that use these patterns are proprietary. Don’t all Django styleguides have this issue? The hope is that the prose is persuasive enough to make you feel like you can you give some of the ideas a try in a corner of your codebase..

3 months ago 1 0 1 0

I’d love you to take a look and let me know what you think!

www.django-rapid-architecture.org

DabApps introduction post: www.dabapps.com/insights/int...

3 months ago 0 0 1 0

- Keep views thin: treat GET as "read some data" and POST as "do an action".
- Design endpoints around real frontend use cases (Backend For Frontend) instead of idealised resources.
- Control queries carefully to avoid performance traps.

3 months ago 0 0 1 0

- Keep models thin: data definitions, not “god objects”.
- Organise code by responsibility (readers, actions, interfaces, data) rather than by app.
- Put most business logic in plain functions, not in fat models or deep class hierarchies.

3 months ago 0 0 1 0

It's a free, opinionated guide to structuring real‑world Django codebases so they stay understandable and malleable as they grow.

It’s not a new framework, and it doesn’t try to hide Django. Instead, it leans into Django’s strengths and focuses on a few simple ideas:

3 months ago 0 0 1 0
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Django RAPID architecture A curated collection of patterns and idioms for successful, maintainable and robust Django codebases

Oh hi blue sky. Just popping in to say:

Introducing Django RAPID architecture, the guidebook I've been writing (on and off) for a year or so, and thinking about for my entire career.

www.django-rapid-architecture.org

3 months ago 0 0 1 0
Changelog - django-readers A lightweight function-oriented toolkit for better organisation of business logic and efficient selection and projection of data in Django projects.

Released django-readers 2.4.0 with support for Django 5.2 and a nice quality of life improvement for anyone using the DRF integration with schema generation: www.django-readers.org/community/ch...

1 year ago 1 0 0 0
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Greener Charge: Under the Hood - DabApps Recently, we launched Greener Charge - a simple tool that gives EV owners information about when to charge their vehicles to minimise carbon emissions. But what powers this tool, and how do we know it...

Read more about the motivation and methodology behind Greener Charge here: dabapps.com/insights/gre...

P.S. We’re officially introducing Greener Charge at the “Charge & Drive EV Experience Day” tomorrow (3rd April) from 10am-4pm on Brighton Seafront. Come say hi!

1 year ago 0 1 0 0

Feedback very welcome, and please share with your EV-driving friends! 💚

1 year ago 0 0 0 0

The site can be added to the homescreen on your phone so it behaves like an app, which means it only takes a second to check just before you plug in.

1 year ago 0 0 1 0

We use carbon intensity forecasts from National Energy System Operator to tell you at a glance whether you should plug in your EV tonight, or if it’d be better to wait until the grid is greener. We think this approach could reduce the emissions from charging by up to 25%!

1 year ago 0 0 1 0

I'm pretty excited to share a project we’ve been cooking up at DabApps this week: Greener Charge greenercharge.uk

Please follow @greenercharge.uk

🧵

1 year ago 1 0 1 0
Analysis of Powerwall Battery Retention

@protons4b.bsky.social this seems up your street! www.netzero.energy/content/2025...

1 year ago 0 0 2 0
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Could AI Bring About a Hypermedia Renaissance? - DabApps Over the past decade or so, as APIs have moved toward JSON as the de facto standard format, some developers and architects attempted to bring hypermedia concepts along for the ride...

Some musings on what LLM-friendly web APIs might look like: www.dabapps.com/insights/cou...

1 year ago 1 0 0 0
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Rachel Reeves confirms backing for third runway at Heathrow – UK politics live The chancellor says she wants plan for runway brought forward by summer and criticises Conservatives for not acting to build runway

A "potential" 0.43% increase in GDP *by 2050* - in return for torching the UK's climate leadership and adding vast amounts of carbon to the atmosphere - is simply not worth it.

No third runway. Grow the green economy, not airports.

www.theguardian.com/politics/liv...

1 year ago 143 44 5 3
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I don’t disagree. But unlike almost every other emitter of CO2 (transport, heating etc), at least this has a chance of resulting in net negative emissions. I think of it as an investment - the potential downside is *relatively* small but the upside would be hugely significant, if it pays off.

1 year ago 1 0 1 0

I think there’s a good chance of it happening. I think we’ll know more at the end of this year, once the next generation of LLMs appear.

1 year ago 0 0 1 0
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Heat pumps offer vast energy efficiency gains.

They are 4x more efficient than gas boilers.

1 year ago 225 67 13 6

Any usage of any battery will cause it to lose capacity. I have no idea whether 0.4kWh/year is a lot. ~3% per year doesn’t sound wildly out to me. It’s also unclear whether that will continue for the whole lifetime of the battery: my understanding is that a lot of degradation happens early on.

1 year ago 1 0 1 0

Also, hiding capacity is exactly what the Powerwall does: it’s advertised at 13.5kWh but from new it’s actually over 15kWh, so the first few years of degradation don’t impact the advertised capacity. I’m not sure if any other home batteries do this.

1 year ago 2 0 1 0

House batteries are all about getting maximum benefit, so fully charging and discharging is the best approach, even if it’s harder on the battery.

1 year ago 1 0 1 0

You’re right to say that DC fast charging can also be harmful to batteries, and that never happens to house batteries. It’s easier to be friendly to EV batteries because most people rarely do long journeys and can carefully control home charging.

1 year ago 0 0 1 0
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Liebreich: Generative AI – The Power and the Glory | BloombergNEF This year will go down in history as the year the energy sector woke up to AI. This is also the year AI woke up to energy. Is the data center power frenzy just the latest of a long line of energy sect...

Have you seen this monumental opus on the intersection of AI and energy by @mliebreich.bsky.social?

about.bnef.com/blog/liebrei...

1 year ago 49 11 4 6

Kinder in what way? My EV lives in the 20-80% range almost all the time. The Powerwall does zero to 100% and back every day (in winter anyway)

1 year ago 1 0 0 0
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Fair, although I’d expect the two figures to line up once that number reaches 13.5kWh.

Trying to follow your approach: last Sunday, according to the Tesla app, my Powerwall discharged 12.9kWh (and charged 0% from solar). Backup reserve is 5% which suggests a capacity of 13.58kWh. Is that plausible?

1 year ago 0 0 1 0

521Wh lost in about 18 months. I expect it to start eating into the advertised capacity in another 2-3 years.

1 year ago 0 0 1 0

Tesla exposes nominal_full_pack_energy via the local API on the Powerwall. At the start of July 2023 (when my Powerwall was brand new and I started logging it daily) that value was 15,115Wh. Today, it’s 14594Wh.

1 year ago 0 0 2 0
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Happy new year!

1 year ago 1 0 0 0

What I’ve been calling “carbon leverage”:

“if AI helps bring forward the electrification of heating, transport and industry by a single year, that would more than offset any negative climate impact from its own relatively limited power demand.”

1 year ago 2 1 1 0
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Just about scraped over the 5MWh mark for the year.

1 year ago 0 0 0 0