[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"technologies":3,"\u002Fblog\u002Fai-agents-struggle-with-flutter":167,"team-members":2481,"blog-topics":2823,"mdc--12ftuw-key":2865,"glossary":2983},[4,10,15,21,26,32,38,43,48,53,58,63,68,73,77,82,87,92,97,103,108,113,118,123,128,133,138,143,147,152,157,162],{"title":5,"description":6,"slug":7,"category":8,"icon":9},"Android","Every app we ship reaches Android — platform APIs, background execution, permissions, and the store requirements that come with them.","android","framework","logos:android-icon",{"title":11,"description":12,"slug":13,"category":8,"icon":14},"Angular","The front-end framework we work in when a product is already Angular — a batteries-included structure that suits large, long-lived apps.","angular","logos:angular-icon",{"title":16,"description":17,"slug":18,"category":19,"icon":20},"Dart","The language every Flutter app we ship is written in — sound null safety, real pattern matching, and a compiler that targets native and the web.","dart","language","logos:dart",{"title":22,"description":23,"slug":24,"category":8,"icon":25},"Django","The Python framework we use when a product needs an admin, auth and a real data model on day one rather than a hand-rolled service.","django","logos:django-icon",{"title":27,"description":28,"slug":29,"category":30,"icon":31},"Docker","Every service we build ships as a container, so what runs on a laptop, in CI and in production is one artefact rather than three of them.","docker","infrastructure","logos:docker-icon",{"title":33,"description":34,"slug":35,"category":36,"icon":37},"Fastlane","The release automation behind our mobile work — signing, builds and store uploads run from CI instead of from one engineer's laptop on release day.","fastlane","tools","logos:fastlane",{"title":39,"description":40,"slug":41,"category":8,"icon":42},"Flutter","Our primary mobile stack since 2018 — one Dart codebase shipping to iOS, Android, web and desktop without a separate team per platform.","flutter","logos:flutter",{"title":44,"description":45,"slug":46,"category":36,"icon":47},"Git","Every project we touch lives in Git — reviewed pull requests, CI on every branch, and a history that still makes sense months later.","git","logos:git-icon",{"title":49,"description":50,"slug":51,"category":19,"icon":52},"Go","Our backend language for real-time APIs and services under load — small binaries, fast builds, and concurrency that stays readable.","go","logos:gopher",{"title":54,"description":55,"slug":56,"category":30,"icon":57},"Google Cloud","The cloud our production workloads run on — managed Kubernetes, storage and networking, without hand-built servers nobody wants to maintain.","gcp","logos:google-cloud",{"title":59,"description":60,"slug":61,"category":36,"icon":62},"Gradle","The build system every Android release goes through — product flavours, signing configs, and the dependency wiring under a Flutter app.","gradle","logos:gradle",{"title":64,"description":65,"slug":66,"category":30,"icon":67},"Helm","How we package a Kubernetes deployment — service, config, secrets and ingress as one versioned unit that can be promoted and rolled back.","helm","logos:helm",{"title":69,"description":70,"slug":71,"category":19,"icon":72},"Kotlin","What we reach for when a Flutter app needs real Android underneath it — platform channels, background work, and native SDK integrations.","kotlin","logos:kotlin-icon",{"title":74,"description":75,"slug":76,"category":8,"icon":72},"Kotlin Multiplatform","Sharing business logic across iOS and Android while each platform keeps its own native UI — the alternative when Flutter is not the right fit.","kmp",{"title":78,"description":79,"slug":80,"category":30,"icon":81},"Kubernetes","How we run services in production — Helm-packaged deployments, rollouts that can be rolled back, and scaling that does not need a person at 3am.","kubernetes","logos:kubernetes",{"title":83,"description":84,"slug":85,"category":30,"icon":86},"NATS","Lightweight messaging between services — publish\u002Fsubscribe and request\u002Freply without the operational weight of a full broker cluster.","nats","logos:nats-icon",{"title":88,"description":89,"slug":90,"category":8,"icon":91},"Nuxt","Vue with server rendering, routing and SEO handled — how we build marketing sites and web apps that must be fast and indexable on first load.","nuxt","logos:nuxt-icon",{"title":93,"description":94,"slug":95,"category":19,"icon":96},"PHP","Where we work with an existing PHP backend — extending it, integrating with it, and building the mobile and web clients it has to serve.","php","logos:php",{"title":98,"description":99,"slug":100,"category":101,"icon":102},"PostgreSQL","Our default database — the one we reach for unless a product gives us a specific reason not to, from schema design through to index tuning.","postgres","database","logos:postgresql",{"title":104,"description":105,"slug":106,"category":19,"icon":107},"Python","Our language for backends, data work and AI integrations — including the Python bindings we ship for our own Rust tooling.","python","logos:python",{"title":109,"description":110,"slug":111,"category":8,"icon":112},"React","The front-end library we work in when a product is already React — components, hooks, and the ecosystem that has grown around them.","react","logos:react",{"title":114,"description":115,"slug":116,"category":101,"icon":117},"Redis","Where we put data that has to be fast and can be rebuilt — caches, sessions, rate limits, and the queues behind a product's slow paths.","redis","logos:redis",{"title":119,"description":120,"slug":121,"category":19,"icon":122},"Ruby","The language our mobile release automation is written in — Fastlane lanes, custom actions, and the CI glue that ships builds to the stores.","ruby","logos:ruby",{"title":124,"description":125,"slug":126,"category":19,"icon":127},"Rust","Where we go when performance and correctness both matter — document rendering, CLI tooling, and services that have to stay fast and predictable.","rust","simple-icons:rust",{"title":129,"description":130,"slug":131,"category":101,"icon":132},"SQLite","The database that ships inside the app — local caches, offline-first storage, and anything that still has to work with no network.","sqlite","logos:sqlite",{"title":134,"description":135,"slug":136,"category":8,"icon":137},"Strapi","A headless CMS we reach for when editors need to own the content — a real admin and a clean API, without building either from scratch.","strapi","logos:strapi-icon",{"title":139,"description":140,"slug":141,"category":19,"icon":142},"Swift","What we reach for when a Flutter app needs real iOS underneath it — platform channels, native SDK integrations, widgets and App Clips.","swift","logos:swift",{"title":144,"description":145,"slug":146,"category":8,"icon":142},"SwiftUI","Apple's UI framework, where we build the native surfaces a Flutter app cannot own — widgets, App Clips, extensions and system integrations.","swiftui",{"title":148,"description":149,"slug":150,"category":8,"icon":151},"Tailwind CSS","How we style every front end we build — utility classes and design tokens instead of a stylesheet that only ever grows and is never deleted.","tailwind","logos:tailwindcss-icon",{"title":153,"description":154,"slug":155,"category":19,"icon":156},"TypeScript","The default for everything we write for the browser and for Node services — types that catch integration bugs before they reach a review.","typescript","logos:typescript-icon",{"title":158,"description":159,"slug":160,"category":8,"icon":161},"Vue","Our front-end framework for admin panels, merchant dashboards and product web apps that have to stay maintainable for years, not sprints.","vue","logos:vue",{"title":163,"description":164,"slug":165,"category":36,"icon":166},"Whisper","OpenAI's open-source speech recognition model — the transcription engine behind voice input, running as both a backend service and on-device in the app.","whisper","simple-icons:openai",{"id":168,"title":169,"author":170,"body":171,"description":2464,"extension":2465,"hero":2466,"meta":2469,"metaDescription":2470,"metaTitle":2471,"navigation":396,"ogDescription":2472,"path":2473,"seo":2474,"slug":2475,"stem":2476,"summary":2477,"timestamp":2478,"topic":41,"updated":2479,"__hash__":2480},"blog_en\u002Fblog\u002Fai-agents-struggle-with-flutter.md","How AI Agents Struggle with Flutter: 7 Gaps Experience Still Closes","nixan",{"type":172,"value":173,"toc":2450},"minimark",[174,224,227,232,235,246,252,262,308,311,313,317,327,330,522,528,534,634,654,660,662,666,671,674,683,723,739,741,745,750,910,952,958,963,1257,1278,1365,1379,1388,1390,1397,1400,1412,1501,1504,1547,1555,1658,1679,1815,1826,1835,1837,1841,1846,1864,1867,1870,1897,1902,1911,1916,1918,1922,1925,1929,2128,2148,2167,2175,2201,2225,2234,2236,2240,2243,2248,2254,2310,2321,2343,2348,2353,2355,2359,2366,2369,2379,2392,2398,2404,2411,2413,2417,2421,2425,2428,2446],[175,176,177,181,182,187,188,191,192,195,196,199,200,207,208,211,212,215,216,219,220,223],"p",{},[178,179,180],"strong",{},"TL;DR."," This is not an argument against AI writing Flutter. Agents write a large share of our code, and we ",[183,184,186],"a",{"href":185},"\u002Fblog\u002Fbuilding-with-ai","designed our process around that on purpose",". It is an argument about what happens when nobody is orchestrating them. We ship Flutter with agents, and we audit Flutter that agents wrote unsupervised — and the same seven gaps separate the two. An unsupervised agent ",[178,189,190],{},"recomputes derived state"," everywhere instead of keeping one source of truth; ",[178,193,194],{},"writes no tests and no benchmarks",", so review is the only gate and regressions ship freely; ",[178,197,198],{},"collapses complex async into if- and switch-pyramids over loose flags"," instead of modelling it as a stream; ",[178,201,202,203],{},"treats design tokens as constants in a ",[204,205,206],"code",{},"constants.dart"," instead of the ",[204,209,210],{},"ThemeData"," the framework already gives it; ",[178,213,214],{},"invents a fresh UX vocabulary on every screen",", because it cannot see the app; ",[178,217,218],{},"concatenates strings"," where ICU plural rules are mandatory; and ",[178,221,222],{},"simplifies uniformly",", flattening the parts of the domain where complexity is the point. None of this is a Flutter problem, and none of it means the code is worthless. It means the whole-system decisions are still ours.",[225,226],"hr",{},[228,229,231],"h2",{"id":230},"why-flutter-punishes-this-harder-than-most-stacks","Why Flutter punishes this harder than most stacks",[175,233,234],{},"Every one of these failures shows up in every language. Flutter just makes them louder, for four structural reasons.",[175,236,237,240,241,245],{},[178,238,239],{},"The UI is code, all the way down."," There is no stylesheet sitting outside the source to keep things coherent, no cascade, no shared CSS file that a second developer is forced to notice. Every pixel is a Dart expression. If consistency is not enforced ",[242,243,244],"em",{},"inside"," the code, nothing else enforces it.",[175,247,248,251],{},[178,249,250],{},"Everything compiles."," Flutter offers roughly ten reasonable ways to do anything, and all ten run. There is no compiler error for \"you should have used the theme here\", no warning for \"this is the third time you derived this total\", no lint for \"this screen loads differently from the other thirty-nine\". The feedback the agent needs does not exist unless someone builds it.",[175,253,254,257,258,261],{},[178,255,256],{},"The agent never sees the frame."," It writes a screen, gets a clean ",[204,259,260],{},"flutter analyze",", and reports success — on a layout that overflows at 320pt, hides the submit button behind the keyboard, and fails contrast in dark mode. A human notices all three in two seconds of looking. An agent has no eyes unless you give it some.",[175,263,264,267,268,271,272,275,276,279,280,283,284,287,288,291,292,295,296,299,300,303,304,307],{},[178,265,266],{},"The training data is a decade of mixed Flutter."," The framework moves fast and the corpus does not. So agents confidently write ",[204,269,270],{},"RaisedButton"," (removed in 3.0), ",[204,273,274],{},"WillPopScope"," (superseded by ",[204,277,278],{},"PopScope"," after 3.12), ",[204,281,282],{},"MediaQuery.of(context).textScaleFactor"," (replaced by ",[204,285,286],{},"TextScaler"," in 3.16), ",[204,289,290],{},"MaterialStateProperty"," (renamed ",[204,293,294],{},"WidgetStateProperty"," in 3.19), ",[204,297,298],{},"Color.withOpacity"," (deprecated for ",[204,301,302],{},"withValues"," in 3.27), and ",[204,305,306],{},"ThemeData.accentColor",", which was removed in 3.7 and has not existed for years. It is not that the model is wrong — it is that it is answering for a Flutter version nobody ships anymore, and half of it still compiles with a deprecation warning nobody reads.",[175,309,310],{},"Now the seven.",[225,312],{},[228,314,316],{"id":315},"_1-one-source-of-truth-or-recompute-it-everywhere","1. One source of truth, or recompute it everywhere",[175,318,319,322,323,326],{},[178,320,321],{},"What the agent does."," It derives the same value in every place that needs it. The cart total is folded in the cart page. It is folded again in the sticky checkout footer. It is folded a third time in the order summary — and that one applies the discount before tax instead of after. Nothing is ",[242,324,325],{},"wrong"," in any single file; the three just disagree, and the disagreement is invisible until a customer is charged the wrong amount.",[175,328,329],{},"The Flutter-specific version is worse: mirroring state into a widget.",[331,332,336],"pre",{"className":333,"code":334,"language":18,"meta":335,"style":335},"language-dart shiki shiki-themes material-theme-lighter github-light github-dark","class _CartPageState extends State\u003CCartPage> {\n  double _total = 0; \u002F\u002F copy #2 of the truth\n\n  @override\n  void initState() {\n    super.initState();\n    _total = widget.items.fold(0, (sum, i) => sum + i.price * i.qty);\n  }\n  \u002F\u002F ...and now _total never updates when the cart does\n}\n","",[204,337,338,367,391,398,405,418,437,504,510,516],{"__ignoreMap":335},[339,340,343,347,351,354,357,361,364],"span",{"class":341,"line":342},"line",1,[339,344,346],{"class":345},"smGrS","class",[339,348,350],{"class":349},"sZMiF"," _CartPageState",[339,352,353],{"class":345}," extends",[339,355,356],{"class":349}," State",[339,358,360],{"class":359},"su5hD","\u003C",[339,362,363],{"class":349},"CartPage",[339,365,366],{"class":359},"> {\n",[339,368,370,373,376,379,383,387],{"class":341,"line":369},2,[339,371,372],{"class":349},"  double",[339,374,375],{"class":359}," _total ",[339,377,378],{"class":345},"=",[339,380,382],{"class":381},"srdBf"," 0",[339,384,386],{"class":385},"sP7_E",";",[339,388,390],{"class":389},"sutJx"," \u002F\u002F copy #2 of the truth\n",[339,392,394],{"class":341,"line":393},3,[339,395,397],{"emptyLinePlaceholder":396},true,"\n",[339,399,401],{"class":341,"line":400},4,[339,402,404],{"class":403},"sbsja","  @override\n",[339,406,408,411,415],{"class":341,"line":407},5,[339,409,410],{"class":403},"  void",[339,412,414],{"class":413},"sGLFI"," initState",[339,416,417],{"class":359},"() {\n",[339,419,421,425,428,431,434],{"class":341,"line":420},6,[339,422,424],{"class":423},"s_hVV","    super",[339,426,427],{"class":385},".",[339,429,430],{"class":413},"initState",[339,432,433],{"class":359},"()",[339,435,436],{"class":385},";\n",[339,438,440,443,445,448,450,453,455,458,461,464,467,470,472,475,478,481,484,487,489,492,495,497,499,502],{"class":341,"line":439},7,[339,441,442],{"class":359},"    _total ",[339,444,378],{"class":345},[339,446,447],{"class":359}," widget",[339,449,427],{"class":385},[339,451,452],{"class":359},"items",[339,454,427],{"class":385},[339,456,457],{"class":413},"fold",[339,459,460],{"class":359},"(",[339,462,463],{"class":381},"0",[339,465,466],{"class":385},",",[339,468,469],{"class":359}," (sum",[339,471,466],{"class":385},[339,473,474],{"class":359}," i) ",[339,476,477],{"class":345},"=>",[339,479,480],{"class":359}," sum ",[339,482,483],{"class":345},"+",[339,485,486],{"class":359}," i",[339,488,427],{"class":385},[339,490,491],{"class":359},"price ",[339,493,494],{"class":345},"*",[339,496,486],{"class":359},[339,498,427],{"class":385},[339,500,501],{"class":359},"qty)",[339,503,436],{"class":385},[339,505,507],{"class":341,"line":506},8,[339,508,509],{"class":359},"  }\n",[339,511,513],{"class":341,"line":512},9,[339,514,515],{"class":389},"  \u002F\u002F ...and now _total never updates when the cart does\n",[339,517,519],{"class":341,"line":518},10,[339,520,521],{"class":359},"}\n",[175,523,524,525,527],{},"This is the classic ",[204,526,430],{}," copy. It works in the demo because the demo never changes the cart after the page opens. It breaks the first time a quantity is edited from a bottom sheet.",[175,529,530,533],{},[178,531,532],{},"What we do."," The value is derived exactly once, in the state layer, and every widget reads it. If it can be computed from state, it is not state.",[331,535,537],{"className":333,"code":536,"language":18,"meta":335,"style":335},"\u002F\u002F One derivation. The cart page, the footer and the summary all read this.\nStream\u003CMoney> get total => _cart.map(\n  (c) => c.items.fold(Money.zero, (sum, i) => sum + i.subtotal),\n);\n",[204,538,539,544,576,627],{"__ignoreMap":335},[339,540,541],{"class":341,"line":342},[339,542,543],{"class":389},"\u002F\u002F One derivation. The cart page, the footer and the summary all read this.\n",[339,545,546,549,551,554,557,560,563,565,568,570,573],{"class":341,"line":369},[339,547,548],{"class":349},"Stream",[339,550,360],{"class":359},[339,552,553],{"class":349},"Money",[339,555,556],{"class":359},"> ",[339,558,559],{"class":345},"get",[339,561,562],{"class":359}," total ",[339,564,477],{"class":345},[339,566,567],{"class":359}," _cart",[339,569,427],{"class":385},[339,571,572],{"class":413},"map",[339,574,575],{"class":359},"(\n",[339,577,578,581,583,586,588,590,592,594,596,598,600,603,605,607,609,611,613,615,617,619,621,624],{"class":341,"line":393},[339,579,580],{"class":359},"  (c) ",[339,582,477],{"class":345},[339,584,585],{"class":359}," c",[339,587,427],{"class":385},[339,589,452],{"class":359},[339,591,427],{"class":385},[339,593,457],{"class":413},[339,595,460],{"class":359},[339,597,553],{"class":349},[339,599,427],{"class":385},[339,601,602],{"class":359},"zero",[339,604,466],{"class":385},[339,606,469],{"class":359},[339,608,466],{"class":385},[339,610,474],{"class":359},[339,612,477],{"class":345},[339,614,480],{"class":359},[339,616,483],{"class":345},[339,618,486],{"class":359},[339,620,427],{"class":385},[339,622,623],{"class":359},"subtotal)",[339,625,626],{"class":385},",\n",[339,628,629,632],{"class":341,"line":400},[339,630,631],{"class":359},")",[339,633,436],{"class":385},[175,635,636,637,639,640,643,644,646,647,427],{},"Note the ",[204,638,553],{}," type rather than ",[204,641,642],{},"double",". Agents reach for ",[204,645,642],{}," on money constantly, and ",[183,648,650,653],{"href":649},"\u002Fblog\u002Ffloating-point-and-money",[204,651,652],{},"0.1 + 0.2 != 0.3"," is not academic when it is somebody's balance",[175,655,656,659],{},[178,657,658],{},"Why the agent lands there."," Finding the existing derivation costs context; regenerating it inline costs nothing. Each prompt starts fresh, so \"is this already computed somewhere?\" is a question it structurally cannot ask. Every copy is locally reasonable. The drift is what you pay for.",[225,661],{},[228,663,665],{"id":664},"_2-tests-and-benchmarks-or-hope","2. Tests and benchmarks, or hope",[175,667,668,670],{},[178,669,321],{}," It ships the feature and stops. No widget tests, no goldens, no benchmark. The definition of done is \"it compiles and the screen looks plausible in the description I wrote of it\".",[175,672,673],{},"That leaves code review as the only quality gate — and this is the part people underestimate. Review was already the bottleneck when humans wrote the code at human speed. Point three agents at a codebase and the volume of diff arriving at that gate goes up by an order of magnitude while the number of people qualified to review it stays at one. Review does not scale. Executable checks do.",[175,675,676,678,679,682],{},[178,677,532],{}," We write the tests and the benchmarks ",[242,680,681],{},"first",", and not as a virtue exercise — as the feedback loop the agent is missing.",[684,685,686,693,707,717],"ul",{},[687,688,689,692],"li",{},[178,690,691],{},"Widget tests"," for behaviour: the button disables while submitting, the error clears on retype, the list paginates at the right scroll offset.",[687,694,695,702,703,706],{},[178,696,697],{},[698,699,701],"term",{"slug":700},"golden-test","Golden tests"," for appearance. This is the single highest-leverage thing you can hand an agent working on UI, because a golden is the closest thing to giving it eyes. ",[204,704,705],{},"matchesGoldenFile"," turns \"did the redesign break the empty state at 320pt in dark mode with 200% text scale?\" into a check that runs in CI in four seconds. Without goldens, that question is only ever answered by a human opening the app — which is to say, sometimes.",[687,708,709,712,713,716],{},[178,710,711],{},"Benchmarks"," for the things that quietly rot. The frame budget is 16.6ms; a list that janks after someone adds a shadow and an ",[204,714,715],{},"Opacity"," inside the item builder is a regression no unit test catches. Frame timings on a profile build, checked against a budget, catch it.",[687,718,719,722],{},[178,720,721],{},"A regression test for every bug we fix",", so the agent that fixes it cannot un-fix it three prompts later.",[175,724,725,726,729,730,733,734,738],{},"The pattern to internalize: ",[178,727,728],{},"an agent is excellent at satisfying a check it can run, and helpless where no check exists."," Give it ",[204,731,732],{},"flutter test"," and it will iterate until green. Give it nothing and it will tell you it is confident. Our ",[183,735,737],{"href":736},"\u002Fblog\u002Fai-code-audit-findings","audit findings post"," covers what a codebase looks like after a year of the second option.",[225,740],{},[228,742,744],{"id":743},"_3-streams-or-a-pyramid-of-flags","3. Streams, or a pyramid of flags",[175,746,747,749],{},[178,748,321],{}," It represents async state as loose parallel fields and then branches over them.",[331,751,753],{"className":333,"code":752,"language":18,"meta":335,"style":335},"bool _isLoading = false;\nString? _error;\nList\u003CHit> _items = [];\n\n\u002F\u002F build():\nif (_isLoading) return const CircularProgressIndicator();\nif (_error != null) return Text(_error!);\nif (_items.isEmpty) return const Text('Nothing here');\nreturn ListView(\u002F* ... *\u002F);\n",[204,754,755,771,784,804,808,813,835,866,894],{"__ignoreMap":335},[339,756,757,760,763,765,769],{"class":341,"line":342},[339,758,759],{"class":349},"bool",[339,761,762],{"class":359}," _isLoading ",[339,764,378],{"class":345},[339,766,768],{"class":767},"s39Yj"," false",[339,770,436],{"class":385},[339,772,773,776,779,782],{"class":341,"line":369},[339,774,775],{"class":349},"String",[339,777,778],{"class":345},"?",[339,780,781],{"class":359}," _error",[339,783,436],{"class":385},[339,785,786,789,791,794,797,799,802],{"class":341,"line":393},[339,787,788],{"class":349},"List",[339,790,360],{"class":359},[339,792,793],{"class":349},"Hit",[339,795,796],{"class":359},"> _items ",[339,798,378],{"class":345},[339,800,801],{"class":359}," []",[339,803,436],{"class":385},[339,805,806],{"class":341,"line":400},[339,807,397],{"emptyLinePlaceholder":396},[339,809,810],{"class":341,"line":407},[339,811,812],{"class":389},"\u002F\u002F build():\n",[339,814,815,819,822,825,828,831,833],{"class":341,"line":420},[339,816,818],{"class":817},"sVHd0","if",[339,820,821],{"class":359}," (_isLoading) ",[339,823,824],{"class":817},"return",[339,826,827],{"class":403}," const",[339,829,830],{"class":349}," CircularProgressIndicator",[339,832,433],{"class":359},[339,834,436],{"class":385},[339,836,837,839,842,845,848,851,853,856,859,862,864],{"class":341,"line":439},[339,838,818],{"class":817},[339,840,841],{"class":359}," (_error ",[339,843,844],{"class":345},"!=",[339,846,847],{"class":767}," null",[339,849,850],{"class":359},") ",[339,852,824],{"class":817},[339,854,855],{"class":349}," Text",[339,857,858],{"class":359},"(_error",[339,860,861],{"class":345},"!",[339,863,631],{"class":359},[339,865,436],{"class":385},[339,867,868,870,873,875,878,880,882,884,886,890,892],{"class":341,"line":506},[339,869,818],{"class":817},[339,871,872],{"class":359}," (_items",[339,874,427],{"class":385},[339,876,877],{"class":359},"isEmpty) ",[339,879,824],{"class":817},[339,881,827],{"class":403},[339,883,855],{"class":349},[339,885,460],{"class":359},[339,887,889],{"class":888},"s_sjI","'Nothing here'",[339,891,631],{"class":359},[339,893,436],{"class":385},[339,895,896,898,901,903,906,908],{"class":341,"line":512},[339,897,824],{"class":817},[339,899,900],{"class":349}," ListView",[339,902,460],{"class":359},[339,904,905],{"class":389},"\u002F* ... *\u002F",[339,907,631],{"class":359},[339,909,436],{"class":385},[175,911,912,913,916,917,920,921,924,925,927,928,931,932,935,936,939,940,943,944,947,948,951],{},"Three fields, eight representable combinations, four of them meaningless. What renders when ",[204,914,915],{},"_isLoading"," is true ",[242,918,919],{},"and"," ",[204,922,923],{},"_error"," is set? Whatever the order of the ",[204,926,818],{},"s happens to be. Then the search box arrives, and the agent adds a ",[204,929,930],{},"Timer"," for debounce, a ",[204,933,934],{},"_requestId"," counter to discard stale responses, and a ",[204,937,938],{},"mounted"," check before each ",[204,941,942],{},"setState"," — a hand-rolled, subtly broken reimplementation of ",[204,945,946],{},"switchMap",". Alongside it grows a ",[204,949,950],{},"utils.dart"," of static helpers, because the logic has nowhere structural to live.",[175,953,954,955],{},"This is the specific shape: ",[178,956,957],{},"not that agents avoid switches, but that they switch over flags they set by hand instead of over a type the compiler can check.",[175,959,960,962],{},[178,961,532],{}," The state is a sealed hierarchy, so illegal combinations are unrepresentable, and the stream handles the timing.",[331,964,966],{"className":333,"code":965,"language":18,"meta":335,"style":335},"sealed class SearchState {}\nfinal class Idle    extends SearchState {}\nfinal class Loading extends SearchState {}\nfinal class Failed  extends SearchState { Failed(this.error); final AppError error; }\nfinal class Loaded  extends SearchState { Loaded(this.hits); final List\u003CHit> hits; }\n\n\u002F\u002F build() — the compiler enforces that every case is handled\nreturn switch (state) {\n  Idle()                          => const SearchHint(),\n  Loading()                       => const AppSpinner(),\n  Failed(:final error)            => AppErrorView(error),\n  Loaded(:final hits) when hits.isEmpty => const EmptyResults(),\n  Loaded(:final hits)             => HitList(hits),\n};\n",[204,967,968,982,999,1014,1060,1105,1109,1114,1124,1143,1162,1188,1225,1249],{"__ignoreMap":335},[339,969,970,973,976,979],{"class":341,"line":342},[339,971,972],{"class":345},"sealed",[339,974,975],{"class":345}," class",[339,977,978],{"class":349}," SearchState",[339,980,981],{"class":359}," {}\n",[339,983,984,987,989,992,995,997],{"class":341,"line":369},[339,985,986],{"class":403},"final",[339,988,975],{"class":345},[339,990,991],{"class":349}," Idle",[339,993,994],{"class":345},"    extends",[339,996,978],{"class":349},[339,998,981],{"class":359},[339,1000,1001,1003,1005,1008,1010,1012],{"class":341,"line":393},[339,1002,986],{"class":403},[339,1004,975],{"class":345},[339,1006,1007],{"class":349}," Loading",[339,1009,353],{"class":345},[339,1011,978],{"class":349},[339,1013,981],{"class":359},[339,1015,1016,1018,1020,1023,1026,1028,1031,1034,1036,1039,1041,1044,1046,1049,1052,1055,1057],{"class":341,"line":400},[339,1017,986],{"class":403},[339,1019,975],{"class":345},[339,1021,1022],{"class":349}," Failed",[339,1024,1025],{"class":345},"  extends",[339,1027,978],{"class":349},[339,1029,1030],{"class":359}," { ",[339,1032,1033],{"class":349},"Failed",[339,1035,460],{"class":359},[339,1037,1038],{"class":423},"this",[339,1040,427],{"class":385},[339,1042,1043],{"class":359},"error)",[339,1045,386],{"class":385},[339,1047,1048],{"class":403}," final",[339,1050,1051],{"class":349}," AppError",[339,1053,1054],{"class":359}," error",[339,1056,386],{"class":385},[339,1058,1059],{"class":359}," }\n",[339,1061,1062,1064,1066,1069,1071,1073,1075,1078,1080,1082,1084,1087,1089,1091,1094,1096,1098,1101,1103],{"class":341,"line":407},[339,1063,986],{"class":403},[339,1065,975],{"class":345},[339,1067,1068],{"class":349}," Loaded",[339,1070,1025],{"class":345},[339,1072,978],{"class":349},[339,1074,1030],{"class":359},[339,1076,1077],{"class":349},"Loaded",[339,1079,460],{"class":359},[339,1081,1038],{"class":423},[339,1083,427],{"class":385},[339,1085,1086],{"class":359},"hits)",[339,1088,386],{"class":385},[339,1090,1048],{"class":403},[339,1092,1093],{"class":349}," List",[339,1095,360],{"class":359},[339,1097,793],{"class":349},[339,1099,1100],{"class":359},"> hits",[339,1102,386],{"class":385},[339,1104,1059],{"class":359},[339,1106,1107],{"class":341,"line":420},[339,1108,397],{"emptyLinePlaceholder":396},[339,1110,1111],{"class":341,"line":439},[339,1112,1113],{"class":389},"\u002F\u002F build() — the compiler enforces that every case is handled\n",[339,1115,1116,1118,1121],{"class":341,"line":506},[339,1117,824],{"class":817},[339,1119,1120],{"class":817}," switch",[339,1122,1123],{"class":359}," (state) {\n",[339,1125,1126,1129,1132,1134,1136,1139,1141],{"class":341,"line":512},[339,1127,1128],{"class":349},"  Idle",[339,1130,1131],{"class":359},"()                          ",[339,1133,477],{"class":345},[339,1135,827],{"class":403},[339,1137,1138],{"class":349}," SearchHint",[339,1140,433],{"class":359},[339,1142,626],{"class":385},[339,1144,1145,1148,1151,1153,1155,1158,1160],{"class":341,"line":518},[339,1146,1147],{"class":349},"  Loading",[339,1149,1150],{"class":359},"()                       ",[339,1152,477],{"class":345},[339,1154,827],{"class":403},[339,1156,1157],{"class":349}," AppSpinner",[339,1159,433],{"class":359},[339,1161,626],{"class":385},[339,1163,1165,1168,1170,1173,1175,1178,1180,1183,1186],{"class":341,"line":1164},11,[339,1166,1167],{"class":349},"  Failed",[339,1169,460],{"class":359},[339,1171,1172],{"class":345},":",[339,1174,986],{"class":403},[339,1176,1177],{"class":359}," error)            ",[339,1179,477],{"class":345},[339,1181,1182],{"class":349}," AppErrorView",[339,1184,1185],{"class":359},"(error)",[339,1187,626],{"class":385},[339,1189,1191,1194,1196,1198,1200,1203,1206,1209,1211,1214,1216,1218,1221,1223],{"class":341,"line":1190},12,[339,1192,1193],{"class":349},"  Loaded",[339,1195,460],{"class":359},[339,1197,1172],{"class":345},[339,1199,986],{"class":403},[339,1201,1202],{"class":359}," hits) ",[339,1204,1205],{"class":817},"when",[339,1207,1208],{"class":359}," hits",[339,1210,427],{"class":385},[339,1212,1213],{"class":359},"isEmpty ",[339,1215,477],{"class":345},[339,1217,827],{"class":403},[339,1219,1220],{"class":349}," EmptyResults",[339,1222,433],{"class":359},[339,1224,626],{"class":385},[339,1226,1228,1230,1232,1234,1236,1239,1241,1244,1247],{"class":341,"line":1227},13,[339,1229,1193],{"class":349},[339,1231,460],{"class":359},[339,1233,1172],{"class":345},[339,1235,986],{"class":403},[339,1237,1238],{"class":359}," hits)             ",[339,1240,477],{"class":345},[339,1242,1243],{"class":349}," HitList",[339,1245,1246],{"class":359},"(hits)",[339,1248,626],{"class":385},[339,1250,1252,1255],{"class":341,"line":1251},14,[339,1253,1254],{"class":359},"}",[339,1256,436],{"class":385},[175,1258,1259,1260,1263,1264,1266,1267,1270,1271,1273,1274,1277],{},"And the async part — ",[204,1261,1262],{},"debounceTime",", ",[204,1265,946],{}," and ",[204,1268,1269],{},"startWith"," are rxdart extensions on ",[204,1272,548],{},", not ",[204,1275,1276],{},"dart:async"," — where the flag version quietly races:",[331,1279,1281],{"className":333,"code":1280,"language":18,"meta":335,"style":335},"\u002F\u002F Debounce and cancellation are declarative. A stale query cannot win,\n\u002F\u002F because switchMap already cancelled its subscription.\nStream\u003CSearchState> get states => _query\n    .debounceTime(const Duration(milliseconds: 300))\n    .switchMap(_search)\n    .startWith(Idle());\n",[204,1282,1283,1288,1293,1314,1340,1349],{"__ignoreMap":335},[339,1284,1285],{"class":341,"line":342},[339,1286,1287],{"class":389},"\u002F\u002F Debounce and cancellation are declarative. A stale query cannot win,\n",[339,1289,1290],{"class":341,"line":369},[339,1291,1292],{"class":389},"\u002F\u002F because switchMap already cancelled its subscription.\n",[339,1294,1295,1297,1299,1302,1304,1306,1309,1311],{"class":341,"line":393},[339,1296,548],{"class":349},[339,1298,360],{"class":359},[339,1300,1301],{"class":349},"SearchState",[339,1303,556],{"class":359},[339,1305,559],{"class":345},[339,1307,1308],{"class":359}," states ",[339,1310,477],{"class":345},[339,1312,1313],{"class":359}," _query\n",[339,1315,1316,1319,1321,1323,1326,1329,1332,1334,1337],{"class":341,"line":400},[339,1317,1318],{"class":385},"    .",[339,1320,1262],{"class":413},[339,1322,460],{"class":359},[339,1324,1325],{"class":403},"const",[339,1327,1328],{"class":349}," Duration",[339,1330,1331],{"class":359},"(milliseconds",[339,1333,1172],{"class":345},[339,1335,1336],{"class":381}," 300",[339,1338,1339],{"class":359},"))\n",[339,1341,1342,1344,1346],{"class":341,"line":407},[339,1343,1318],{"class":385},[339,1345,946],{"class":413},[339,1347,1348],{"class":359},"(_search)\n",[339,1350,1351,1353,1355,1357,1360,1363],{"class":341,"line":420},[339,1352,1318],{"class":385},[339,1354,1269],{"class":413},[339,1356,460],{"class":359},[339,1358,1359],{"class":349},"Idle",[339,1361,1362],{"class":359},"())",[339,1364,436],{"class":385},[175,1366,1367,1368,1371,1372,1375,1376,1378],{},"Add a new state — ",[204,1369,1370],{},"RateLimited",", say — and the compiler lists every ",[204,1373,1374],{},"switch"," that needs updating. In the flag version, adding a state means finding every ",[204,1377,818],{}," chain by hand and hoping.",[175,1380,1381,1383,1384,1387],{},[178,1382,658],{}," Imperative flags are the most common pattern in the corpus and the easiest to produce one line at a time. A stream requires holding the whole state machine in your head at once, which is exactly what a context-limited generator is worst at. It is the same failure we described as ",[183,1385,1386],{"href":736},"callback hell in audits"," — it just wears a Dart costume.",[225,1389],{},[228,1391,1393,1394,1396],{"id":1392},"_4-knowing-the-framework-themedata-is-not-a-constants-file","4. Knowing the framework: ",[204,1395,210],{}," is not a constants file",[175,1398,1399],{},"This is the one where framework knowledge shows most plainly.",[175,1401,1402,1404,1405,1407,1408,1411],{},[178,1403,321],{}," It creates ",[204,1406,206],{},", fills it with ",[204,1409,1410],{},"static const primary = Color(0xFF6750A4)",", and then writes styles inline at every call site.",[331,1413,1415],{"className":333,"code":1414,"language":18,"meta":335,"style":335},"Text(\n  'Balance',\n  style: TextStyle(\n    fontSize: 16,\n    fontWeight: FontWeight.w600,\n    color: AppColors.textPrimary,\n  ),\n)\n",[204,1416,1417,1424,1431,1443,1455,1472,1489,1496],{"__ignoreMap":335},[339,1418,1419,1422],{"class":341,"line":342},[339,1420,1421],{"class":349},"Text",[339,1423,575],{"class":359},[339,1425,1426,1429],{"class":341,"line":369},[339,1427,1428],{"class":888},"  'Balance'",[339,1430,626],{"class":385},[339,1432,1433,1436,1438,1441],{"class":341,"line":393},[339,1434,1435],{"class":359},"  style",[339,1437,1172],{"class":345},[339,1439,1440],{"class":349}," TextStyle",[339,1442,575],{"class":359},[339,1444,1445,1448,1450,1453],{"class":341,"line":400},[339,1446,1447],{"class":359},"    fontSize",[339,1449,1172],{"class":345},[339,1451,1452],{"class":381}," 16",[339,1454,626],{"class":385},[339,1456,1457,1460,1462,1465,1467,1470],{"class":341,"line":407},[339,1458,1459],{"class":359},"    fontWeight",[339,1461,1172],{"class":345},[339,1463,1464],{"class":349}," FontWeight",[339,1466,427],{"class":385},[339,1468,1469],{"class":359},"w600",[339,1471,626],{"class":385},[339,1473,1474,1477,1479,1482,1484,1487],{"class":341,"line":420},[339,1475,1476],{"class":359},"    color",[339,1478,1172],{"class":345},[339,1480,1481],{"class":349}," AppColors",[339,1483,427],{"class":385},[339,1485,1486],{"class":359},"textPrimary",[339,1488,626],{"class":385},[339,1490,1491,1494],{"class":341,"line":439},[339,1492,1493],{"class":359},"  )",[339,1495,626],{"class":385},[339,1497,1498],{"class":341,"line":506},[339,1499,1500],{"class":359},")\n",[175,1502,1503],{},"That single line has four separate problems, and only the first is obvious:",[1505,1506,1507,1522,1532,1538],"ol",{},[687,1508,1509,920,1514,1517,1518,1521],{},[178,1510,1511,1512,427],{},"Dark mode is now a manual ",[204,1513,818],{},[204,1515,1516],{},"AppColors.textPrimary"," is one colour. Supporting a second theme means a ternary on ",[204,1519,1520],{},"Theme.of(context).brightness"," at every one of the 200 sites — which is exactly what agents then write, one screen at a time.",[687,1523,1524,1527,1528,1531],{},[178,1525,1526],{},"The rebrand is a 400-file diff."," A designer changing the type ramp should be a change in one file. Here it is a find-and-replace across the app, and the sites that drifted (",[204,1529,1530],{},"fontSize: 15"," on two screens because that generation rounded differently) will be missed.",[687,1533,1534,1537],{},[178,1535,1536],{},"System text scaling breaks the layout."," Hardcoded sizes composed against hardcoded paddings mean a user at 200% accessibility scale gets overflow, not reflow.",[687,1539,1540,1546],{},[178,1541,1542,1545],{},[204,1543,1544],{},"Theme.of(context)"," overrides stop working."," Wrapping a subtree in a different theme — a dark section on a light screen, a branded checkout inside a neutral app — does nothing, because nothing in the subtree asks the theme anything.",[175,1548,1549,1551,1552,1554],{},[178,1550,532],{}," The design system lives in ",[204,1553,210],{},", once, at the root.",[331,1556,1558],{"className":333,"code":1557,"language":18,"meta":335,"style":335},"MaterialApp(\n  theme: AppTheme.light,   \u002F\u002F ColorScheme.fromSeed + TextTheme + component themes\n  darkTheme: AppTheme.dark,\n  \u002F\u002F ...\n)\n\n\u002F\u002F Every widget asks the framework instead of a constants file:\nText('Balance', style: Theme.of(context).textTheme.titleMedium)\n",[204,1559,1560,1567,1587,1603,1608,1612,1616,1621],{"__ignoreMap":335},[339,1561,1562,1565],{"class":341,"line":342},[339,1563,1564],{"class":349},"MaterialApp",[339,1566,575],{"class":359},[339,1568,1569,1572,1574,1577,1579,1582,1584],{"class":341,"line":369},[339,1570,1571],{"class":359},"  theme",[339,1573,1172],{"class":345},[339,1575,1576],{"class":349}," AppTheme",[339,1578,427],{"class":385},[339,1580,1581],{"class":359},"light",[339,1583,466],{"class":385},[339,1585,1586],{"class":389},"   \u002F\u002F ColorScheme.fromSeed + TextTheme + component themes\n",[339,1588,1589,1592,1594,1596,1598,1601],{"class":341,"line":393},[339,1590,1591],{"class":359},"  darkTheme",[339,1593,1172],{"class":345},[339,1595,1576],{"class":349},[339,1597,427],{"class":385},[339,1599,1600],{"class":359},"dark",[339,1602,626],{"class":385},[339,1604,1605],{"class":341,"line":400},[339,1606,1607],{"class":389},"  \u002F\u002F ...\n",[339,1609,1610],{"class":341,"line":407},[339,1611,1500],{"class":359},[339,1613,1614],{"class":341,"line":420},[339,1615,397],{"emptyLinePlaceholder":396},[339,1617,1618],{"class":341,"line":439},[339,1619,1620],{"class":389},"\u002F\u002F Every widget asks the framework instead of a constants file:\n",[339,1622,1623,1625,1627,1630,1632,1635,1637,1640,1642,1645,1648,1650,1653,1655],{"class":341,"line":506},[339,1624,1421],{"class":349},[339,1626,460],{"class":359},[339,1628,1629],{"class":888},"'Balance'",[339,1631,466],{"class":385},[339,1633,1634],{"class":359}," style",[339,1636,1172],{"class":345},[339,1638,1639],{"class":349}," Theme",[339,1641,427],{"class":385},[339,1643,1644],{"class":413},"of",[339,1646,1647],{"class":359},"(context)",[339,1649,427],{"class":385},[339,1651,1652],{"class":359},"textTheme",[339,1654,427],{"class":385},[339,1656,1657],{"class":359},"titleMedium)\n",[175,1659,1660,1661,1263,1664,1263,1667,1670,1671,1674,1675,1678],{},"Component themes (",[204,1662,1663],{},"FilledButtonThemeData",[204,1665,1666],{},"CardThemeData",[204,1668,1669],{},"InputDecorationThemeData",") mean a button looks right ",[242,1672,1673],{},"by default",", so the agent producing the twentieth screen cannot get it wrong even if it tries. For brand tokens Material has no slot for — a chart palette, a gradient, a semantic \"positive\u002Fnegative\" pair in a fintech app — a ",[204,1676,1677],{},"ThemeExtension"," keeps them inside the same lookup instead of next to it:",[331,1680,1682],{"className":333,"code":1681,"language":18,"meta":335,"style":335},"final class BrandColors extends ThemeExtension\u003CBrandColors> {\n  const BrandColors({required this.positive, required this.negative});\n  final Color positive;\n  final Color negative;\n  \u002F\u002F copyWith \u002F lerp ...\n}\n\n\u002F\u002F usage\nfinal brand = Theme.of(context).extension\u003CBrandColors>()!;\n",[204,1683,1684,1705,1740,1753,1764,1769,1773,1777,1782],{"__ignoreMap":335},[339,1685,1686,1688,1690,1693,1695,1698,1700,1703],{"class":341,"line":342},[339,1687,986],{"class":403},[339,1689,975],{"class":345},[339,1691,1692],{"class":349}," BrandColors",[339,1694,353],{"class":345},[339,1696,1697],{"class":349}," ThemeExtension",[339,1699,360],{"class":359},[339,1701,1702],{"class":349},"BrandColors",[339,1704,366],{"class":359},[339,1706,1707,1710,1712,1715,1718,1721,1723,1726,1728,1731,1733,1735,1738],{"class":341,"line":369},[339,1708,1709],{"class":403},"  const",[339,1711,1692],{"class":349},[339,1713,1714],{"class":359},"({",[339,1716,1717],{"class":403},"required",[339,1719,1720],{"class":423}," this",[339,1722,427],{"class":385},[339,1724,1725],{"class":359},"positive",[339,1727,466],{"class":385},[339,1729,1730],{"class":403}," required",[339,1732,1720],{"class":423},[339,1734,427],{"class":385},[339,1736,1737],{"class":359},"negative})",[339,1739,436],{"class":385},[339,1741,1742,1745,1748,1751],{"class":341,"line":393},[339,1743,1744],{"class":403},"  final",[339,1746,1747],{"class":349}," Color",[339,1749,1750],{"class":359}," positive",[339,1752,436],{"class":385},[339,1754,1755,1757,1759,1762],{"class":341,"line":400},[339,1756,1744],{"class":403},[339,1758,1747],{"class":349},[339,1760,1761],{"class":359}," negative",[339,1763,436],{"class":385},[339,1765,1766],{"class":341,"line":407},[339,1767,1768],{"class":389},"  \u002F\u002F copyWith \u002F lerp ...\n",[339,1770,1771],{"class":341,"line":420},[339,1772,521],{"class":359},[339,1774,1775],{"class":341,"line":439},[339,1776,397],{"emptyLinePlaceholder":396},[339,1778,1779],{"class":341,"line":506},[339,1780,1781],{"class":389},"\u002F\u002F usage\n",[339,1783,1784,1786,1789,1791,1793,1795,1797,1799,1801,1804,1806,1809,1811,1813],{"class":341,"line":512},[339,1785,986],{"class":403},[339,1787,1788],{"class":359}," brand ",[339,1790,378],{"class":345},[339,1792,1639],{"class":349},[339,1794,427],{"class":385},[339,1796,1644],{"class":413},[339,1798,1647],{"class":359},[339,1800,427],{"class":385},[339,1802,1803],{"class":345},"extension\u003C",[339,1805,1702],{"class":349},[339,1807,1808],{"class":345},">",[339,1810,433],{"class":359},[339,1812,861],{"class":345},[339,1814,436],{"class":385},[175,1816,1817,1818,1820,1821,1825],{},"Dark mode then costs one more ",[204,1819,210],{},", not a ternary per widget. On ",[183,1822,1824],{"href":1823},"\u002Fportfolio\u002Farcana","Arcana"," the entire custom design system is expressed this way, which is why a design revision there is a diff you can read in a single review.",[175,1827,1828,1830,1831,1834],{},[178,1829,658],{}," A constant is ",[242,1832,1833],{},"locally"," correct and immediately satisfying: the colour appears, the screen builds. Threading a design system through the framework only pays off across many screens and a second theme — and payoff-across-the-whole-app is precisely the axis a per-prompt optimizer cannot see.",[225,1836],{},[228,1838,1840],{"id":1839},"_5-eyes-and-a-decade-of-shipping","5. Eyes, and a decade of shipping",[175,1842,1843,1845],{},[178,1844,321],{}," It builds forty screens, each one defensible on its own, that together feel like an app assembled from forty tutorials — because in a sense it was.",[175,1847,1848,1849,1852,1853,1856,1857,1860,1861,1863],{},"Loading is a ",[204,1850,1851],{},"CircularProgressIndicator"," on the home screen, a shimmer skeleton on the feed, and a custom animated logo on the profile. Errors are a ",[204,1854,1855],{},"SnackBar"," here, inline red text there, and a modal ",[204,1858,1859],{},"AlertDialog"," on the third screen. A destructive confirm is an ",[204,1862,1859],{}," on one screen and a bottom sheet on the next. Empty states have three different illustrations, two different tones of voice, and one that is just the word \"Empty\". Some forms validate on every keystroke, some on submit, one on focus loss. Primary buttons are full-width in one flow and wrapped-to-content in another.",[175,1865,1866],{},"Every one of those is a reasonable choice. The problem is that a user learns an app once. When the same action looks different in three places, they stop trusting that they know what will happen — and that cost shows up in support tickets, not in a lint report.",[175,1868,1869],{},"Then there is the class of defects that only exist on a screen:",[684,1871,1872,1878,1881,1884,1887,1894],{},[687,1873,1874,1877],{},[204,1875,1876],{},"RenderFlex overflowed by 27 pixels"," on any device narrower than the agent imagined",[687,1879,1880],{},"tap targets under 44\u002F48dp, which test fine and miss constantly on a real thumb",[687,1882,1883],{},"the keyboard covering the field being typed into, because nothing scrolls",[687,1885,1886],{},"text truncated at 200% system scale",[687,1888,1889,1890,1893],{},"content under the notch or behind the home indicator, because ",[204,1891,1892],{},"SafeArea"," was not part of the prompt",[687,1895,1896],{},"contrast that passes in light mode and fails in dark",[175,1898,1899,1901],{},[204,1900,260],{}," is clean for every single one.",[175,1903,1904,1906,1907,1910],{},[178,1905,532],{}," We decide the interaction vocabulary once — how loading looks, how errors surface, how destructive actions confirm, when forms validate, how navigation behaves, what an empty state says — and then every screen implements ",[242,1908,1909],{},"that",". Ten-plus years of shipping mostly buys knowing which patterns users already have in their fingers, because thousands of other apps put them there. Familiar beats clever essentially always, and the way to check is to open the app on a real device, at a real text scale, in both themes, with a thumb.",[175,1912,1913,1915],{},[178,1914,658],{}," It genuinely cannot see. It is generating a plausible screen from a description, with no memory of the thirty-nine screens before it and no image of the one it just produced. Local plausibility is the only target available to it.",[225,1917],{},[228,1919,1921],{"id":1920},"_6-icu-is-not-optional-and-concatenation-is-not-localization","6. ICU is not optional, and concatenation is not localization",[175,1923,1924],{},"We build apps for markets where getting this wrong is visible in the first sentence of the first screen. Agents get it wrong by default.",[175,1926,1927],{},[178,1928,321],{},[331,1930,1932],{"className":333,"code":1931,"language":18,"meta":335,"style":335},"Text('$count items');                                  \u002F\u002F 1 items\nText('$count ${count == 1 ? \"item\" : \"items\"}');       \u002F\u002F \"clever\", still broken\nText('Hello, ' + name + '!');                          \u002F\u002F English word order, baked in\nText('${d.day}.${d.month}.${d.year}');                 \u002F\u002F wrong half the world\nText('\\$${amount.toStringAsFixed(2)}');                \u002F\u002F wrong separator, wrong position\n",[204,1933,1934,1961,2007,2034,2090],{"__ignoreMap":335},[339,1935,1936,1938,1940,1943,1947,1951,1954,1956,1958],{"class":341,"line":342},[339,1937,1421],{"class":349},[339,1939,460],{"class":359},[339,1941,1942],{"class":888},"'",[339,1944,1946],{"class":1945},"sfo-9","$",[339,1948,1950],{"class":1949},"sfi6f","count",[339,1952,1953],{"class":888}," items'",[339,1955,631],{"class":359},[339,1957,386],{"class":385},[339,1959,1960],{"class":389},"                                  \u002F\u002F 1 items\n",[339,1962,1963,1965,1967,1969,1971,1973,1976,1978,1981,1984,1987,1990,1993,1996,1998,2000,2002,2004],{"class":341,"line":369},[339,1964,1421],{"class":349},[339,1966,460],{"class":359},[339,1968,1942],{"class":888},[339,1970,1946],{"class":1945},[339,1972,1950],{"class":1949},[339,1974,1975],{"class":1945}," ${",[339,1977,1950],{"class":1949},[339,1979,1980],{"class":1945}," == ",[339,1982,1983],{"class":381},"1",[339,1985,1986],{"class":1945}," ? ",[339,1988,1989],{"class":888},"\"item\"",[339,1991,1992],{"class":1945}," : ",[339,1994,1995],{"class":888},"\"items\"",[339,1997,1254],{"class":1945},[339,1999,1942],{"class":888},[339,2001,631],{"class":359},[339,2003,386],{"class":385},[339,2005,2006],{"class":389},"       \u002F\u002F \"clever\", still broken\n",[339,2008,2009,2011,2013,2016,2019,2022,2024,2027,2029,2031],{"class":341,"line":393},[339,2010,1421],{"class":349},[339,2012,460],{"class":359},[339,2014,2015],{"class":888},"'Hello, '",[339,2017,2018],{"class":345}," +",[339,2020,2021],{"class":359}," name ",[339,2023,483],{"class":345},[339,2025,2026],{"class":888}," '!'",[339,2028,631],{"class":359},[339,2030,386],{"class":385},[339,2032,2033],{"class":389},"                          \u002F\u002F English word order, baked in\n",[339,2035,2036,2038,2040,2042,2045,2048,2050,2053,2055,2057,2059,2061,2063,2066,2068,2070,2072,2074,2076,2079,2081,2083,2085,2087],{"class":341,"line":400},[339,2037,1421],{"class":349},[339,2039,460],{"class":359},[339,2041,1942],{"class":888},[339,2043,2044],{"class":1945},"${",[339,2046,2047],{"class":1949},"d",[339,2049,427],{"class":1945},[339,2051,2052],{"class":1949},"day",[339,2054,1254],{"class":1945},[339,2056,427],{"class":888},[339,2058,2044],{"class":1945},[339,2060,2047],{"class":1949},[339,2062,427],{"class":1945},[339,2064,2065],{"class":1949},"month",[339,2067,1254],{"class":1945},[339,2069,427],{"class":888},[339,2071,2044],{"class":1945},[339,2073,2047],{"class":1949},[339,2075,427],{"class":1945},[339,2077,2078],{"class":1949},"year",[339,2080,1254],{"class":1945},[339,2082,1942],{"class":888},[339,2084,631],{"class":359},[339,2086,386],{"class":385},[339,2088,2089],{"class":389},"                 \u002F\u002F wrong half the world\n",[339,2091,2092,2094,2096,2098,2101,2103,2106,2108,2111,2113,2116,2119,2121,2123,2125],{"class":341,"line":407},[339,2093,1421],{"class":349},[339,2095,460],{"class":359},[339,2097,1942],{"class":888},[339,2099,2100],{"class":423},"\\$",[339,2102,2044],{"class":1945},[339,2104,2105],{"class":1949},"amount",[339,2107,427],{"class":1945},[339,2109,2110],{"class":413},"toStringAsFixed",[339,2112,460],{"class":1945},[339,2114,2115],{"class":381},"2",[339,2117,2118],{"class":1945},")}",[339,2120,1942],{"class":888},[339,2122,631],{"class":359},[339,2124,386],{"class":385},[339,2126,2127],{"class":389},"                \u002F\u002F wrong separator, wrong position\n",[175,2129,2130,2131,1263,2134,1263,2137,1263,2140,2143,2144,2147],{},"The boolean-ternary plural is the instructive one, because it looks like the developer thought about it. It encodes an assumption that is true in English and false almost everywhere else: that a language has exactly two plural forms. Russian has four categories (",[204,2132,2133],{},"one",[204,2135,2136],{},"few",[204,2138,2139],{},"many",[204,2141,2142],{},"other",") — 1 файл, 2 файла, 5 файлов — so the ternary is wrong for most numbers on the screen. Arabic has six. Japanese has one, and pluralizing at all reads as broken. No amount of ternary nesting fixes this, because the ",[242,2145,2146],{},"rule"," is per-language data, not a condition you write.",[175,2149,2150,2151,2154,2155,2158,2159,2162,2163,2166],{},"The same applies down the line. Concatenation bakes English syntax into the source, so a translator cannot reorder the sentence. Decimal separators, thousands separators, and currency-symbol position are locale data (",[204,2152,2153],{},"1 234,56 €"," versus ",[204,2156,2157],{},"$1,234.56","). Date order is locale data. And in RTL layouts, ",[204,2160,2161],{},"EdgeInsets.only(left: 16)"," — which agents write reflexively — puts the padding on the wrong side, where ",[204,2164,2165],{},"EdgeInsetsDirectional.only(start: 16)"," would have been correct.",[175,2168,2169,2171,2172,1172],{},[178,2170,532],{}," Messages live in ARB files with ICU MessageFormat, generated into typed accessors by ",[204,2173,2174],{},"gen_l10n",[331,2176,2180],{"className":2177,"code":2178,"language":2179,"meta":335,"style":335},"language-json shiki shiki-themes material-theme-lighter github-light github-dark","{\n  \"unreadMessages\": \"{count, plural, =0{No new messages} one{{count} new message} other{{count} new messages}}\",\n  \"@unreadMessages\": { \"placeholders\": { \"count\": { \"type\": \"int\" } } }\n}\n","json",[204,2181,2182,2187,2192,2197],{"__ignoreMap":335},[339,2183,2184],{"class":341,"line":342},[339,2185,2186],{},"{\n",[339,2188,2189],{"class":341,"line":369},[339,2190,2191],{},"  \"unreadMessages\": \"{count, plural, =0{No new messages} one{{count} new message} other{{count} new messages}}\",\n",[339,2193,2194],{"class":341,"line":393},[339,2195,2196],{},"  \"@unreadMessages\": { \"placeholders\": { \"count\": { \"type\": \"int\" } } }\n",[339,2198,2199],{"class":341,"line":400},[339,2200,521],{},[175,2202,2203,2204,2206,2207,2206,2209,2206,2211,2213,2214,1266,2217,2220,2221,2224],{},"The Russian ARB for the same key carries ",[204,2205,2133],{},"\u002F",[204,2208,2136],{},[204,2210,2139],{},[204,2212,2142],{}," — the format has room for the language, and the framework picks the right branch from CLDR data. ",[204,2215,2216],{},"NumberFormat.currency",[204,2218,2219],{},"DateFormat.yMMMd(locale)"," handle the rest, and directional insets keep RTL honest. The call site becomes ",[204,2222,2223],{},"Text(l10n.unreadMessages(count))",", which is both shorter than the ternary and correct.",[175,2226,2227,2229,2230,2233],{},[178,2228,658],{}," String interpolation is the shortest path to text on screen, and it is ",[242,2231,2232],{},"visibly correct"," in the language the prompt was written in. The failure only appears in a locale the agent was never asked about, at a number it never tried.",[225,2235],{},[228,2237,2239],{"id":2238},"_7-knowing-where-to-simplify-and-where-not-to","7. Knowing where to simplify — and where not to",[175,2241,2242],{},"The last one is judgment, and it is the hardest to hand over.",[175,2244,2245,2247],{},[178,2246,321],{}," It applies simplification uniformly, which produces two opposite failures in the same codebase.",[175,2249,2250,2251,1172],{},"It ",[178,2252,2253],{},"flattens complexity that was load-bearing",[331,2255,2257],{"className":333,"code":2256,"language":18,"meta":335,"style":335},"try {\n  await api.charge(order);\n} catch (_) {\n  \u002F\u002F swallowed: network failure, declined card, and idempotency conflict\n  \u002F\u002F are now the same event, and the retry will double-charge\n}\n",[204,2258,2259,2267,2285,2296,2301,2306],{"__ignoreMap":335},[339,2260,2261,2264],{"class":341,"line":342},[339,2262,2263],{"class":817},"try",[339,2265,2266],{"class":359}," {\n",[339,2268,2269,2272,2275,2277,2280,2283],{"class":341,"line":369},[339,2270,2271],{"class":817},"  await",[339,2273,2274],{"class":359}," api",[339,2276,427],{"class":385},[339,2278,2279],{"class":413},"charge",[339,2281,2282],{"class":359},"(order)",[339,2284,436],{"class":385},[339,2286,2287,2290,2293],{"class":341,"line":393},[339,2288,2289],{"class":359},"} ",[339,2291,2292],{"class":817},"catch",[339,2294,2295],{"class":359}," (_) {\n",[339,2297,2298],{"class":341,"line":400},[339,2299,2300],{"class":389},"  \u002F\u002F swallowed: network failure, declined card, and idempotency conflict\n",[339,2302,2303],{"class":341,"line":407},[339,2304,2305],{"class":389},"  \u002F\u002F are now the same event, and the retry will double-charge\n",[339,2307,2308],{"class":341,"line":420},[339,2309,521],{"class":359},[175,2311,2312,2313,2316,2317,2320],{},"Retry and idempotency logic gets collapsed into a single call because \"it looked redundant\". A token-refresh race gets a simple ",[204,2314,2315],{},"await"," because the mutex \"seemed unused\". Distinct failure modes get merged into one ",[204,2318,2319],{},"Something went wrong",", which is precisely the message that makes a payment bug unreproducible. Cancellation tokens get dropped because no test referenced them.",[175,2322,2323,2324,2327,2328,2331,2332,2335,2336,2339,2340,2342],{},"And it ",[178,2325,2326],{},"over-abstracts things that were fine",": an ",[204,2329,2330],{},"AppButton"," with fourteen optional named parameters and six booleans, a ",[204,2333,2334],{},"BaseRepository\u003CT, ID>"," generic hierarchy over three endpoints, an ",[204,2337,2338],{},"AbstractBaseViewModel"," nobody can subclass without reading it end to end, and the inevitable ",[204,2341,950],{}," where forty unrelated static functions go to die.",[175,2344,2345,2347],{},[178,2346,532],{}," Complexity is a budget, and it gets spent where the domain is genuinely hard: payments, offline sync and conflict resolution, auth token refresh, idempotency, anything that touches money or identity. Those places stay explicit, verbose, and boring on purpose — each failure mode named, each retry deliberate. Everywhere else, we collapse aggressively: five near-identical list tiles become one widget, the settings screen gets no abstraction layer at all, and a repository that wraps one endpoint is just a function.",[175,2349,2350,2352],{},[178,2351,658],{}," \"Which parts of this domain will hurt someone if they are wrong?\" is not information that exists in the code. It comes from the product, the regulatory context, and having been on the incident call. An agent optimizing for readable, minimal diffs treats a payment retry loop and a settings toggle as the same kind of thing, because syntactically they are.",[225,2354],{},[228,2356,2358],{"id":2357},"what-orchestration-actually-means","What orchestration actually means",[175,2360,2361,2362,2365],{},"Read the seven together and the shape is clear: every one is a ",[178,2363,2364],{},"whole-system property"," — consistency, coverage, a state model, a design system, an interaction vocabulary, a locale model, a complexity budget. None of them can emerge one prompt at a time, because no prompt sees the whole. That is not a flaw to be prompted away; it is what the context window is.",[175,2367,2368],{},"So the engineer's job moves up the stack, and it is mostly four things:",[175,2370,2371,2374,2375,427],{},[178,2372,2373],{},"Set the invariants before the code exists."," The theme, the state model, the localization setup, the folder structure, the error taxonomy. Once those exist, \"follow the existing pattern\" has something to point at — and agents are genuinely good at following a pattern that is already in the repo. The first two days decide the next six months, which is why they get a phase of their own in ",[183,2376,2378],{"href":2377},"\u002Fblog\u002Fflutter-app-development-process","our development process",[175,2380,2381,2384,2385,2388,2389,2391],{},[178,2382,2383],{},"Build the feedback loops the agent does not have."," A strict ",[204,2386,2387],{},"analysis_options.yaml"," with lints promoted to errors. ",[204,2390,732],{}," with widget and golden coverage. A frame-time budget checked on profile builds. Every one of these converts a judgment call into a check the agent can run and iterate against on its own, which is the only way its speed becomes an asset instead of a liability.",[175,2393,2394,2397],{},[178,2395,2396],{},"Review decisions, not lines."," Is this the same state model as the rest of the app? Is this styled from the theme? Is this the one derivation of that value? Is this string going to survive Russian? Line-by-line review of agent output does not scale and never will; decision-level review does, because the decisions are few.",[175,2399,2400,2403],{},[178,2401,2402],{},"Open the app."," On a device, at 200% text scale, in dark mode, in both languages, with the network throttled. This takes ten minutes and finds the entire category of defects that no static check will ever report.",[175,2405,2406,2407,2410],{},"That is the actual difference between Flutter written by an agent and Flutter written by a team ",[183,2408,2409],{"href":185},"orchestrating agents",". Not the code — the code is often fine. The constraints around it.",[225,2412],{},[228,2414,2416],{"id":2415},"frequently-asked-questions","Frequently asked questions",[2418,2419],"questions",{":items":2420},"[{\"title\": \"Can AI agents write good Flutter code?\", \"text\": \"They can write good Flutter code inside a codebase that already has structure — a theme, a state model, a localization setup, and tests to iterate against. What they cannot do is create that structure, because every one of those is a whole-system property and an agent optimizes each prompt locally. Given an existing pattern to follow, agent output is genuinely strong. Given an empty repository and no constraints, it produces forty screens that each work and do not add up to one app.\"}, {\"title\": \"Why does AI-generated Flutter code look inconsistent across screens?\", \"text\": \"Because the agent has no memory of the screens it built earlier and no way to see the app it is building. Each screen is generated as a plausible standalone answer, so loading indicators, error handling, empty states, confirmation dialogs and form validation timing all differ from screen to screen. Every individual choice is defensible; the aggregate reads as an app assembled from unrelated tutorials, and users notice because they only learn an app once.\"}, {\"title\": \"Why do AI agents hardcode colors and text styles instead of using ThemeData?\", \"text\": \"A constant is locally correct and immediately satisfying — the color appears and the screen builds. Wiring a design system through ThemeData only pays off across many screens and a second theme, which is exactly the horizon a per-prompt optimizer cannot see. The cost arrives later: dark mode becomes a manual condition at every call site, a rebrand becomes a several-hundred-file diff, and system text scaling breaks the layout because sizes are fixed numbers rather than a type ramp.\"}, {\"title\": \"What is wrong with using string interpolation for plurals in Flutter?\", \"text\": \"It encodes an assumption that is true in English and false almost everywhere else: that a language has exactly two plural forms. Russian has four plural categories, Arabic has six, and Japanese has one. A condition such as count equals one cannot express any of them. ICU MessageFormat in ARB files handles plural categories per language from CLDR data, and the same applies to number formatting, currency symbol placement, date order and right-to-left layout, none of which survive string concatenation.\"}, {\"title\": \"Do AI agents write tests for Flutter apps?\", \"text\": \"Not unless asked. Generating a feature and generating its tests are two separate requests and the second one usually never happens, so code review becomes the only quality gate at exactly the moment agents multiply the volume of code arriving at it. The highest-leverage fix for UI work is golden tests, because a golden is the closest thing to giving an agent eyes: it turns questions like whether a redesign broke the empty state in dark mode into a check that runs in continuous integration in seconds.\"}, {\"title\": \"Why do AI agents avoid streams in Flutter?\", \"text\": \"Imperative flags are the most common pattern in training data and the easiest to produce one line at a time, while a stream requires holding an entire state machine in mind at once. So agents write parallel boolean and nullable fields and branch over them, which makes illegal combinations representable and stale responses possible. Modelling the same thing as a sealed state class consumed from a stream makes the compiler enforce exhaustiveness and makes debouncing and cancellation declarative rather than hand-rolled.\"}, {\"title\": \"Should we rewrite an AI-built Flutter app?\", \"text\": \"Usually not. The features work and the product is real; what is missing is the connective tissue — a single source of truth for derived state, a test and golden layer, a proper state model for complex async, a theme instead of constants, a consistent interaction vocabulary, and real localization. All of that is fixable in place, and doing it in place is far faster than a rebuild. A focused audit identifies which of the seven is costing the most and in what order to fix them.\"}]",[228,2422,2424],{"id":2423},"working-on-a-flutter-app-an-agent-built","Working on a Flutter app an agent built",[175,2426,2427],{},"If you recognize your codebase in this list, it is not a sign that using AI was a mistake — it is what unsupervised agent output looks like in Flutter, every time, and it is fixable without a rewrite.",[175,2429,2430,2431,2435,2436,2440,2441,2445],{},"We build Flutter this way for a living: agents write a lot of the code, and our engineers own the seven decisions above. Have a look at ",[183,2432,2434],{"href":2433},"\u002Fservices\u002Fflutter-app-development","how we do Flutter app development",", run an existing codebase through an ",[183,2437,2439],{"href":2438},"\u002Fservices\u002Fai-code-audit","AI code audit",", or ",[183,2442,2444],{"href":2443},"\u002Fcontact","book a free assessment"," and we will tell you which of these seven is costing you the most.",[2447,2448,2449],"style",{},"html pre.shiki code .smGrS, html code.shiki .smGrS{--shiki-light:#39ADB5;--shiki-default:#D73A49;--shiki-dark:#F97583}html pre.shiki code .sZMiF, html code.shiki .sZMiF{--shiki-light:#E2931D;--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .su5hD, html code.shiki .su5hD{--shiki-light:#90A4AE;--shiki-default:#24292E;--shiki-dark:#E1E4E8}html pre.shiki code .srdBf, html code.shiki .srdBf{--shiki-light:#F76D47;--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .sP7_E, html code.shiki .sP7_E{--shiki-light:#39ADB5;--shiki-default:#24292E;--shiki-dark:#E1E4E8}html pre.shiki code .sutJx, html code.shiki .sutJx{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#6A737D;--shiki-default-font-style:inherit;--shiki-dark:#6A737D;--shiki-dark-font-style:inherit}html pre.shiki code .sbsja, html code.shiki .sbsja{--shiki-light:#9C3EDA;--shiki-default:#D73A49;--shiki-dark:#F97583}html pre.shiki code .sGLFI, html code.shiki .sGLFI{--shiki-light:#6182B8;--shiki-default:#6F42C1;--shiki-dark:#B392F0}html pre.shiki code .s_hVV, html code.shiki .s_hVV{--shiki-light:#90A4AE;--shiki-default:#005CC5;--shiki-dark:#79B8FF}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .s39Yj, html code.shiki .s39Yj{--shiki-light:#39ADB5;--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .sVHd0, html code.shiki .sVHd0{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#D73A49;--shiki-default-font-style:inherit;--shiki-dark:#F97583;--shiki-dark-font-style:inherit}html pre.shiki code .s_sjI, html code.shiki .s_sjI{--shiki-light:#91B859;--shiki-default:#032F62;--shiki-dark:#9ECBFF}html pre.shiki code .sfo-9, html code.shiki .sfo-9{--shiki-light:#90A4AE;--shiki-default:#032F62;--shiki-dark:#9ECBFF}html pre.shiki code .sfi6f, html code.shiki .sfi6f{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#005CC5;--shiki-default-font-style:inherit;--shiki-dark:#79B8FF;--shiki-dark-font-style:inherit}",{"title":335,"searchDepth":369,"depth":369,"links":2451},[2452,2453,2454,2455,2456,2458,2459,2460,2461,2462,2463],{"id":230,"depth":369,"text":231},{"id":315,"depth":369,"text":316},{"id":664,"depth":369,"text":665},{"id":743,"depth":369,"text":744},{"id":1392,"depth":369,"text":2457},"4. Knowing the framework: ThemeData is not a constants file",{"id":1839,"depth":369,"text":1840},{"id":1920,"depth":369,"text":1921},{"id":2238,"depth":369,"text":2239},{"id":2357,"depth":369,"text":2358},{"id":2415,"depth":369,"text":2416},{"id":2423,"depth":369,"text":2424},"TL;DR. This is not an argument against AI writing Flutter. Agents write a large share of our code, and we designed our process around that on purpose. It is an argument about what happens when nobody is orchestrating them. We ship Flutter with agents, and we audit Flutter that agents wrote unsupervised — and the same seven gaps separate the two. An unsupervised agent recomputes derived state everywhere instead of keeping one source of truth; writes no tests and no benchmarks, so review is the only gate and regressions ship freely; collapses complex async into if- and switch-pyramids over loose flags instead of modelling it as a stream; treats design tokens as constants in a constants.dart instead of the ThemeData the framework already gives it; invents a fresh UX vocabulary on every screen, because it cannot see the app; concatenates strings where ICU plural rules are mandatory; and simplifies uniformly, flattening the parts of the domain where complexity is the point. None of this is a Flutter problem, and none of it means the code is worthless. It means the whole-system decisions are still ours.","md",{"type":2467,"src":2468},"image","\u002Fblog\u002Fai-agents-struggle-with-flutter.webp",{},"Seven places an unsupervised AI agent gets Flutter wrong — duplicated state, no tests, callback pyramids, hardcoded styles, ICU plurals — and the fixes.","How AI Agents Struggle with Flutter Code","We let agents write a lot of our Flutter, and we review a lot written by agents nobody supervised. Seven decisions separate the two.","\u002Fblog\u002Fai-agents-struggle-with-flutter",{"title":169,"description":2464},"ai-agents-struggle-with-flutter","blog\u002Fai-agents-struggle-with-flutter","We let agents write a large share of our Flutter code, and we review a lot of Flutter written by agents nobody supervised. The difference is not typing speed — it is seven decisions an unsupervised agent gets wrong every single time: it recomputes derived state instead of keeping one source of truth, ships no tests or benchmarks, wires complex async into if-pyramids instead of streams, treats design tokens as constants instead of a Theme, invents a new UX vocabulary on every screen, concatenates strings where ICU is required, and simplifies uniformly instead of knowing where complexity has to stay. Here is what each one looks like in Dart, why the agent lands there, and what we do instead.","2026-07-26T20:06:43Z",null,"tqXW80VWkxGO70hpkakzjZ65TD9fB7-_r9qzCaKRewI",[2482,2539,2586,2636,2725,2777],{"id":2483,"bio":2484,"expertise":2489,"extension":2505,"links":2506,"meta":2510,"metaDescription":2511,"name":2516,"ogDescription":2519,"photo":2524,"role":2525,"seniority":2530,"skills":2531,"slug":2532,"specialization":2533,"stem":2532,"__hash__":2538},"team_members\u002Fdima.yaml",{"en":2485,"ru":2486,"es":2487,"nl":2488},"Dima has been building with [Flutter](\u002Ftechnologies\u002Fflutter) since 2021, and specializes in :term[state management]{slug=\"state-management\"} and app architecture.\n\nHe has hands-on experience with real-time communication protocols — :term{slug=\"webrtc\"} for audio and video, and :term{slug=\"xmpp\"} for messaging — which makes him comfortable with the network-heavy, stateful features many teams struggle to get right.\n","Дима работает с [Flutter](\u002Ftechnologies\u002Fflutter) с 2021 года и специализируется на :term[state management]{slug=\"state-management\"} и архитектуре приложений.\n\nУ него есть практический опыт с протоколами реального времени — :term{slug=\"webrtc\"} для аудио и видео и :term{slug=\"xmpp\"} для обмена сообщениями, — поэтому ему близки сетевые stateful-фичи, которые многим командам даются с трудом.\n","Dima trabaja con [Flutter](\u002Ftechnologies\u002Fflutter) desde 2021 y se especializa en :term[gestión de estado]{slug=\"state-management\"} y arquitectura de aplicaciones.\n\nTiene experiencia práctica con protocolos de comunicación en tiempo real —:term{slug=\"webrtc\"} para audio y vídeo, y :term{slug=\"xmpp\"} para mensajería—, lo que le hace sentirse cómodo con esas funcionalidades con mucho estado y mucha red que a muchos equipos se les atragantan.\n","Dima werkt sinds 2021 met [Flutter](\u002Ftechnologies\u002Fflutter) en is gespecialiseerd in :term[state management]{slug=\"state-management\"} en applicatiearchitectuur.\n\nHij heeft praktijkervaring met protocollen voor realtime communicatie — :term{slug=\"webrtc\"} voor audio en video, en :term{slug=\"xmpp\"} voor berichten — waardoor hij zich thuis voelt bij de netwerkzware functies met veel staat waar veel teams moeite mee hebben.\n",[2490,2493,2498,2500],{"en":2491,"ru":2491,"es":2492,"nl":2491},"State management","Gestión de estado",{"en":2494,"ru":2495,"es":2496,"nl":2497},"Application architecture","Архитектура приложений","Arquitectura de aplicaciones","Applicatiearchitectuur",{"en":2499,"ru":2499,"es":2499,"nl":2499},"WebRTC",{"en":2501,"ru":2502,"es":2503,"nl":2504},"XMPP messaging","Обмен сообщениями по XMPP","Mensajería XMPP","Berichten via XMPP","yaml",[2507],{"type":2508,"address":2509},"email","konopatov@nerdy.pro",{},{"en":2512,"ru":2513,"es":2514,"nl":2515},"Lead Flutter developer at Nerdy Production, building real-time apps since 2021 — state management, app architecture, WebRTC and XMPP.","Ведущий Flutter-разработчик Nerdy Production: приложения реального времени с 2021 года — state management, архитектура, WebRTC и XMPP.","Lead de desarrollo Flutter en Nerdy Production, construyendo apps en tiempo real desde 2021: gestión de estado, arquitectura de aplicaciones, WebRTC y XMPP.","Lead Flutter-developer bij Nerdy Production, bouwt sinds 2021 realtime-apps — state management, applicatiearchitectuur, WebRTC en XMPP.",{"en":2517,"ru":2518,"es":2517,"nl":2517},"Dima","Дима",{"en":2520,"ru":2521,"es":2522,"nl":2523},"Lead Flutter developer at Nerdy Production — real-time apps since 2021, and the state management that keeps them from falling over.","Ведущий Flutter-разработчик Nerdy Production: приложения реального времени с 2021 года и state management, на котором они держатся.","Lead de desarrollo Flutter en Nerdy Production: apps en tiempo real desde 2021 y la gestión de estado que evita que se caigan.","Lead Flutter-developer bij Nerdy Production — realtime-apps sinds 2021, en het state management dat ze overeind houdt.","\u002Fteam\u002Fdima.webp",{"en":2526,"ru":2527,"es":2528,"nl":2529},"Lead Flutter Developer","Ведущий Flutter-разработчик","Lead de desarrollo Flutter","Lead Flutter-developer","lead",[41,18,155,160,90,111,150,95],"dima",{"en":2534,"ru":2535,"es":2536,"nl":2537},"Real-time apps, state management, and architecture","Приложения реального времени, state management и архитектура","Apps en tiempo real, gestión de estado y arquitectura","Realtime-apps, state management en architectuur","1TuxUt3zjdVkQUvMf9dBITG872C0exrdZyyoKw1beiE",{"id":2540,"bio":2541,"expertise":2546,"extension":2505,"links":2479,"meta":2557,"metaDescription":2558,"name":2563,"ogDescription":2566,"photo":2571,"role":2572,"seniority":2577,"skills":2578,"slug":2579,"specialization":2580,"stem":2579,"__hash__":2585},"team_members\u002Fmasha.yaml",{"en":2542,"ru":2543,"es":2544,"nl":2545},"Masha builds [Flutter](\u002Ftechnologies\u002Fflutter) apps where design and copy are treated as one job.\n\nShe specializes in UI\u002FUX — turning product requirements into clean, usable interfaces — and in the writing inside the app, from onboarding flows to the microcopy that makes a screen make sense. The result is apps that feel considered, not just functional.\n","Маша делает приложения на [Flutter](\u002Ftechnologies\u002Fflutter), где дизайн и текст — одна задача.\n\nОна специализируется на UI\u002FUX, превращая продуктовые требования в чистые и удобные интерфейсы, и на текстах внутри приложения — от онбординга до микрокопирайта, который делает экран понятным. В итоге приложения получаются продуманными, а не просто рабочими.\n","Masha crea apps en [Flutter](\u002Ftechnologies\u002Fflutter) donde el diseño y el texto se tratan como un mismo trabajo.\n\nSe especializa en UI\u002FUX —convertir requisitos de producto en interfaces limpias y usables— y en la escritura dentro de la app, desde los flujos de onboarding hasta el microcopy que hace que una pantalla se entienda. El resultado son apps que se sienten pensadas, no solo funcionales.\n","Masha bouwt [Flutter](\u002Ftechnologies\u002Fflutter)-apps waarin ontwerp en tekst als één taak worden behandeld.\n\nZe is gespecialiseerd in UI\u002FUX — productwensen omzetten in heldere, bruikbare interfaces — en in de teksten binnen de app, van onboarding tot de microteksten die een scherm begrijpelijk maken. Het resultaat zijn apps die doordacht aanvoelen en niet alleen werken.\n",[2547,2552],{"en":2548,"ru":2549,"es":2550,"nl":2551},"UI\u002FUX design","UI\u002FUX-дизайн","Diseño UI\u002FUX","UI\u002FUX-ontwerp",{"en":2553,"ru":2554,"es":2555,"nl":2556},"Product copywriting","Продуктовый копирайтинг","Redacción de producto","Productteksten",{},{"en":2559,"ru":2560,"es":2561,"nl":2562},"Flutter developer at Nerdy Production working where design meets copy — UI\u002FUX, onboarding flows, and the microcopy that makes a screen make sense.","Flutter-разработчик Nerdy Production на стыке дизайна и текста: UI\u002FUX, онбординг и микрокопирайт, который делает экран понятным.","Desarrolladora Flutter en Nerdy Production, donde el diseño se encuentra con el texto: UI\u002FUX, onboarding y el microcopy que hace que una pantalla se entienda.","Flutter-developer bij Nerdy Production op het snijvlak van ontwerp en tekst — UI\u002FUX, onboarding, en de microteksten die een scherm begrijpelijk maken.",{"en":2564,"ru":2565,"es":2564,"nl":2564},"Masha","Маша",{"en":2567,"ru":2568,"es":2569,"nl":2570},"Flutter developer at Nerdy Production working where design meets copy — onboarding flows and the microcopy that makes a screen make sense.","Flutter-разработчик Nerdy Production на стыке дизайна и текста: онбординг и микрокопирайт, который делает экран понятным.","Desarrolladora Flutter en Nerdy Production, donde el diseño se encuentra con el texto: onboarding y el microcopy que hace entender una pantalla.","Flutter-developer bij Nerdy Production op het snijvlak van ontwerp en tekst — onboarding en de microteksten die een scherm begrijpelijk maken.","\u002Fteam\u002Fmasha.webp",{"en":2573,"ru":2574,"es":2575,"nl":2576},"Flutter Developer","Flutter-разработчик","Desarrolladora Flutter","Flutter-developer","middle",[41,18],"masha",{"en":2581,"ru":2582,"es":2583,"nl":2584},"UI\u002FUX and copywriting for Flutter apps","UI\u002FUX и копирайтинг для Flutter-приложений","UI\u002FUX y redacción para apps Flutter","UI\u002FUX en teksten voor Flutter-apps","z3c64iWR39RIrn8wE0elSy00IfCITYgNkbgp_G_sslk",{"id":2587,"bio":2588,"expertise":2593,"extension":2505,"links":2604,"meta":2607,"metaDescription":2608,"name":2613,"ogDescription":2616,"photo":2621,"role":2622,"seniority":2627,"skills":2628,"slug":2629,"specialization":2630,"stem":2629,"__hash__":2635},"team_members\u002Fmaxim.yaml",{"en":2589,"ru":2590,"es":2591,"nl":2592},"Maxim is a polyglot engineer who moves comfortably across [Go](\u002Ftechnologies\u002Fgo), [Flutter](\u002Ftechnologies\u002Fflutter), [Python](\u002Ftechnologies\u002Fpython), and [TypeScript](\u002Ftechnologies\u002Ftypescript), which lets him own a feature from the backend to the screen.\n\nHe came up at Ozon, one of Russia's largest marketplaces, where scale makes reliability non-negotiable — and it shows in his work: testing is a first-class part of how he builds, not an afterthought bolted on at the end.\n","Максим — полиглот-инженер, свободно работающий с [Go](\u002Ftechnologies\u002Fgo), [Flutter](\u002Ftechnologies\u002Fflutter), [Python](\u002Ftechnologies\u002Fpython) и [TypeScript](\u002Ftechnologies\u002Ftypescript), что позволяет ему вести фичу от бэкенда до экрана.\n\nОн вырос в Ozon, одном из крупнейших маркетплейсов России, где масштаб делает надёжность обязательной, — и это видно в его работе: тестирование для него первоклассная часть разработки, а не то, что прикручивают в конце.\n","Maxim es un ingeniero políglota que se mueve con soltura entre [Go](\u002Ftechnologies\u002Fgo), [Flutter](\u002Ftechnologies\u002Fflutter), [Python](\u002Ftechnologies\u002Fpython) y [TypeScript](\u002Ftechnologies\u002Ftypescript), lo que le permite hacerse cargo de una funcionalidad desde el backend hasta la pantalla.\n\nSe formó en Ozon, uno de los mayores marketplaces de Rusia, donde la escala hace que la fiabilidad no sea negociable, y se le nota: el testing es para él una parte de primera clase de cómo construye, no un añadido al final.\n","Maxim is een polyglotte engineer die zich moeiteloos beweegt tussen [Go](\u002Ftechnologies\u002Fgo), [Flutter](\u002Ftechnologies\u002Fflutter), [Python](\u002Ftechnologies\u002Fpython) en [TypeScript](\u002Ftechnologies\u002Ftypescript), waardoor hij een functie van de backend tot het scherm kan dragen.\n\nHij is opgegroeid bij Ozon, een van de grootste marktplaatsen van Rusland, waar schaal betrouwbaarheid onderhandelbaar maakt noch toestaat — en dat zie je terug in zijn werk: testen is bij hem een volwaardig onderdeel van hoe hij bouwt, geen bijzaak die er aan het eind bij komt.\n",[2594,2599],{"en":2595,"ru":2596,"es":2597,"nl":2598},"Automated testing","Автоматизированное тестирование","Testing automatizado","Geautomatiseerd testen",{"en":2600,"ru":2601,"es":2602,"nl":2603},"High-load backend systems","Высоконагруженные бэкенд-системы","Sistemas backend de alta carga","Backendsystemen met hoge belasting",[2605],{"type":2508,"address":2606},"maxim@nerdy.pro",{},{"en":2609,"ru":2610,"es":2611,"nl":2612},"Senior engineer at Nerdy Production across Go, Flutter, Python and TypeScript — from backend to screen, with automated testing built in.","Старший инженер Nerdy Production: Go, Flutter, Python и TypeScript — от бэкенда до экрана, с автотестами как частью разработки.","Ingeniero senior en Nerdy Production con Go, Flutter, Python y TypeScript: del backend a la pantalla, con testing automatizado incorporado.","Senior engineer bij Nerdy Production met Go, Flutter, Python en TypeScript — van backend tot scherm, met geautomatiseerd testen ingebouwd.",{"en":2614,"ru":2615,"es":2614,"nl":2614},"Maxim","Максим",{"en":2617,"ru":2618,"es":2619,"nl":2620},"Senior engineer at Nerdy Production working from backend to screen — Go, Flutter, Python and TypeScript, with the tests written as he goes.","Старший инженер Nerdy Production, работающий от бэкенда до экрана: Go, Flutter, Python и TypeScript — и тесты, которые пишутся по ходу дела.","Ingeniero senior en Nerdy Production, del backend a la pantalla: Go, Flutter, Python y TypeScript, con los tests escritos sobre la marcha.","Senior engineer bij Nerdy Production, van backend tot scherm — Go, Flutter, Python en TypeScript, met de tests die hij onderweg schrijft.","\u002Fteam\u002Fmax.webp",{"en":2623,"ru":2624,"es":2625,"nl":2626},"Senior Software Engineer","Старший инженер-программист","Ingeniero de software senior","Senior software engineer","senior",[41,18,51,106,155,13,150],"maxim",{"en":2631,"ru":2632,"es":2633,"nl":2634},"Backend and Flutter engineering with a testing focus","Бэкенд и Flutter с фокусом на тестирование","Ingeniería backend y Flutter con foco en testing","Backend- en Flutter-engineering met focus op testen","a-8Kx1i-PQXIGU92_Rimqr3bPEur6ZwMfPKQWr2uk4I",{"id":2637,"bio":2638,"expertise":2643,"extension":2505,"links":2685,"meta":2697,"metaDescription":2698,"name":2703,"ogDescription":2706,"photo":2711,"role":2712,"seniority":2717,"skills":2718,"slug":170,"specialization":2719,"stem":170,"__hash__":2724},"team_members\u002Fnixan.yaml",{"en":2639,"ru":2640,"es":2641,"nl":2642},"Ilya founded Nerdy Production and leads its engineering. He has been building software since 2010 and shipping production Flutter since 2018.\n\nBefore that he was CTO of QIWI, one of Russia's largest payment platforms, where he ran roughly 12 engineering teams spanning web products down to card processing, :term{slug=\"pci-dss\"} scope, and contactless payments — including building contactless card payments on Android via :term[Host Card Emulation]{slug=\"host-card-emulation\"} over ISO\u002FIEC 14443, with EMV Contactless (Visa PayWave) on top.\n\nHe was also a principal developer at Yandex, where he worked on Yandex.Auto — taking native Android deep into the vehicle, with heavy CAN-bus integration through a custom CAN shield — and a principal at Evotor, whose point-of-sale devices run on a forked :term{slug=\"aosp\"}, giving him a low-level view of Android most app developers never touch.\n\nToday he leads delivery on the agency's flagship apps — from the chart-heavy fintech UI of [ExtraETF](\u002Fportfolio\u002Fextraetf) to the fully custom design system of [Arcana](\u002Fportfolio\u002Farcana). He writes most of the essays on this blog and maintains the agency's open-source work, including the [dxpdf](\u002Fopen-source\u002Fdxpdf) DOCX-to-PDF engine.\n\nHe works across [Flutter](\u002Ftechnologies\u002Fflutter), native iOS and Android, [Go](\u002Ftechnologies\u002Fgo), [Rust](\u002Ftechnologies\u002Frust), [TypeScript](\u002Ftechnologies\u002Ftypescript), [Kotlin](\u002Ftechnologies\u002Fkotlin), [Kubernetes](\u002Ftechnologies\u002Fkubernetes), and [Docker](\u002Ftechnologies\u002Fdocker), with a focus on app architecture, cross-platform delivery, and building teams that ship.\n","Илья основал Nerdy Production и руководит инженерной командой. Он занимается разработкой с 2010 года и выпускает продакшн-приложения на Flutter с 2018-го.\n\nДо этого он был CTO QIWI — одной из крупнейших платёжных платформ России, — где руководил примерно 12 инженерными командами: от веб-продуктов до карточного процессинга, зоны :term{slug=\"pci-dss\"} и бесконтактных платежей, включая бесконтактную оплату картой на Android через :term[Host Card Emulation]{slug=\"host-card-emulation\"} поверх ISO\u002FIEC 14443, с платёжным протоколом EMV Contactless (Visa PayWave).\n\nОн также был принципал-разработчиком в Яндексе, где работал над Яндекс.Авто, уводя нативный Android глубоко в автомобиль, с серьёзной интеграцией по шине CAN через собственный CAN-шилд, и принципалом в Эвоторе, чьи кассовые устройства работают на форке :term{slug=\"aosp\"}, что дало ему низкоуровневый взгляд на Android, недоступный большинству прикладных разработчиков.\n\nСейчас он ведёт поставку флагманских приложений агентства — от насыщенного графиками финтех-интерфейса [ExtraETF](\u002Fportfolio\u002Fextraetf) до полностью кастомной дизайн-системы [Arcana](\u002Fportfolio\u002Farcana). Он пишет большую часть материалов этого блога и поддерживает open-source агентства, включая движок [dxpdf](\u002Fopen-source\u002Fdxpdf) для конвертации DOCX в PDF.\n\nРаботает с [Flutter](\u002Ftechnologies\u002Fflutter), нативными iOS и Android, [Go](\u002Ftechnologies\u002Fgo), [Rust](\u002Ftechnologies\u002Frust), [TypeScript](\u002Ftechnologies\u002Ftypescript), [Kotlin](\u002Ftechnologies\u002Fkotlin), [Kubernetes](\u002Ftechnologies\u002Fkubernetes) и [Docker](\u002Ftechnologies\u002Fdocker); его фокус — архитектура приложений, кросс-платформенная поставка и построение команд, которые доводят продукт до релиза.\n","Ilya fundó Nerdy Production y dirige su ingeniería. Lleva construyendo software desde 2010 y entregando Flutter en producción desde 2018.\n\nAntes fue CTO de QIWI, una de las mayores plataformas de pago de Rusia, donde dirigió alrededor de 12 equipos de ingeniería que abarcaban desde productos web hasta procesamiento de tarjetas, alcance :term{slug=\"pci-dss\"} y pagos contactless, incluida la construcción de pagos contactless con tarjeta en Android mediante :term[Host Card Emulation]{slug=\"host-card-emulation\"} sobre ISO\u002FIEC 14443, con EMV Contactless (Visa PayWave) por encima.\n\nTambién fue principal developer en Yandex, donde trabajó en Yandex.Auto —llevando Android nativo hasta el interior del vehículo, con una integración intensiva por bus CAN a través de un CAN shield propio— y principal en Evotor, cuyos terminales de punto de venta funcionan sobre un fork de :term{slug=\"aosp\"}, lo que le dio una visión de bajo nivel de Android que la mayoría de desarrolladores de apps nunca llega a tocar.\n\nHoy lidera la entrega de las apps insignia de la agencia, desde la interfaz fintech cargada de gráficos de [ExtraETF](\u002Fportfolio\u002Fextraetf) hasta el sistema de diseño totalmente a medida de [Arcana](\u002Fportfolio\u002Farcana). Escribe la mayoría de los artículos de este blog y mantiene el trabajo de código abierto de la agencia, incluido el motor de conversión de DOCX a PDF [dxpdf](\u002Fopen-source\u002Fdxpdf).\n\nTrabaja con [Flutter](\u002Ftechnologies\u002Fflutter), iOS y Android nativos, [Go](\u002Ftechnologies\u002Fgo), [Rust](\u002Ftechnologies\u002Frust), [TypeScript](\u002Ftechnologies\u002Ftypescript), [Kotlin](\u002Ftechnologies\u002Fkotlin), [Kubernetes](\u002Ftechnologies\u002Fkubernetes) y [Docker](\u002Ftechnologies\u002Fdocker), con foco en arquitectura de aplicaciones, entrega multiplataforma y la construcción de equipos que entregan.\n","Ilya richtte Nerdy Production op en leidt de engineering. Hij bouwt software sinds 2010 en levert sinds 2018 Flutter in productie.\n\nDaarvoor was hij CTO van QIWI, een van de grootste betaalplatforms van Rusland, waar hij zo'n 12 engineeringteams aanstuurde die reikten van webproducten tot kaartverwerking, :term{slug=\"pci-dss\"}-scope en contactloos betalen — waaronder het bouwen van contactloze kaartbetalingen op Android via :term[Host Card Emulation]{slug=\"host-card-emulation\"} over ISO\u002FIEC 14443, met EMV Contactless (Visa PayWave) daarbovenop.\n\nHij was ook principal developer bij Yandex, waar hij aan Yandex.Auto werkte — native Android diep de auto in brengen, met zware integratie over de CAN-bus via een eigen CAN-shield — en principal bij Evotor, waarvan de kassa-apparaten op een fork van :term{slug=\"aosp\"} draaien, wat hem een blik op Android op laag niveau gaf die de meeste app-ontwikkelaars nooit krijgen.\n\nVandaag leidt hij de oplevering van de vlaggenschipapps van het bureau — van de grafiekzware fintech-UI van [ExtraETF](\u002Fportfolio\u002Fextraetf) tot het volledig eigen designsysteem van [Arcana](\u002Fportfolio\u002Farcana). Hij schrijft de meeste artikelen op deze blog en onderhoudt het opensourcewerk van het bureau, waaronder de DOCX-naar-PDF-motor [dxpdf](\u002Fopen-source\u002Fdxpdf).\n\nHij werkt met [Flutter](\u002Ftechnologies\u002Fflutter), native iOS en Android, [Go](\u002Ftechnologies\u002Fgo), [Rust](\u002Ftechnologies\u002Frust), [TypeScript](\u002Ftechnologies\u002Ftypescript), [Kotlin](\u002Ftechnologies\u002Fkotlin), [Kubernetes](\u002Ftechnologies\u002Fkubernetes) en [Docker](\u002Ftechnologies\u002Fdocker), met de nadruk op applicatiearchitectuur, cross-platform oplevering en het bouwen van teams die opleveren.\n",[2644,2649,2654,2659,2664,2669,2674,2679,2681,2683],{"en":2645,"ru":2646,"es":2647,"nl":2648},"iOS development","Разработка под iOS","Desarrollo iOS","iOS-ontwikkeling",{"en":2650,"ru":2651,"es":2652,"nl":2653},"Software architecture","Архитектура ПО","Arquitectura de software","Softwarearchitectuur",{"en":2655,"ru":2656,"es":2657,"nl":2658},"Engineering team leadership","Руководство инженерными командами","Liderazgo de equipos de ingeniería","Leidinggeven aan engineeringteams",{"en":2660,"ru":2661,"es":2662,"nl":2663},"Payment systems","Платёжные системы","Sistemas de pago","Betaalsystemen",{"en":2665,"ru":2666,"es":2667,"nl":2668},"Card processing","Карточный процессинг","Procesamiento de tarjetas","Kaartverwerking",{"en":2670,"ru":2671,"es":2672,"nl":2673},"PCI-DSS compliance","Соответствие PCI-DSS","Cumplimiento de PCI-DSS","Naleving van PCI-DSS",{"en":2675,"ru":2676,"es":2677,"nl":2678},"NFC and contactless payments","NFC и бесконтактные платежи","NFC y pagos contactless","NFC en contactloos betalen",{"en":2680,"ru":2680,"es":2680,"nl":2680},"Host Card Emulation",{"en":2682,"ru":2682,"es":2682,"nl":2682},"EMV Contactless",{"en":2684,"ru":2684,"es":2684,"nl":2684},"AOSP",[2686,2689,2692,2695],{"type":2687,"url":2688},"github","https:\u002F\u002Fgithub.com\u002Fthenixan",{"type":2690,"url":2691},"linkedin","https:\u002F\u002Fwww.linkedin.com\u002Fin\u002Fthenixan\u002F",{"type":2693,"url":2694},"telegram","https:\u002F\u002Ft.me\u002Fthenixan",{"type":2508,"address":2696},"nixan@nerdy.pro",{},{"en":2699,"ru":2700,"es":2701,"nl":2702},"Founder and lead developer at Nerdy Production, former CTO of QIWI. Flutter architecture, payments infrastructure, and engineering teams that ship.","Основатель и ведущий разработчик Nerdy Production, экс-CTO QIWI. Архитектура на Flutter, платёжная инфраструктура и команды, которые доводят до релиза.","Fundador y lead developer en Nerdy Production, ex-CTO de QIWI. Arquitectura Flutter, infraestructura de pagos y equipos de ingeniería que entregan.","Oprichter en lead developer bij Nerdy Production, oud-CTO van QIWI. Flutter-architectuur, betaalinfrastructuur en teams die opleveren.",{"en":2704,"ru":2705,"es":2704,"nl":2704},"Ilya Nixan","Илья Никсан",{"en":2707,"ru":2708,"es":2709,"nl":2710},"Founder and lead developer at Nerdy Production, former CTO of QIWI — Flutter architecture, payments infrastructure, and teams that ship.","Основатель и ведущий разработчик Nerdy Production, экс-CTO QIWI: архитектура на Flutter, платёжная инфраструктура и команды, которые доводят до релиза.","Fundador y lead developer en Nerdy Production, ex-CTO de QIWI: arquitectura Flutter, infraestructura de pagos y equipos que entregan.","Oprichter en lead developer bij Nerdy Production, oud-CTO van QIWI — Flutter-architectuur, betaalinfrastructuur en teams die opleveren.","\u002Fteam\u002Fnixan.webp",{"en":2713,"ru":2714,"es":2715,"nl":2716},"Founder & Lead Developer","Основатель и ведущий разработчик","Fundador y lead developer","Oprichter & lead developer","founder_lead",[41,18,71,141,76,146,51,126,121,155,160,90,13,150,136,7,29,80],{"en":2720,"ru":2721,"es":2722,"nl":2723},"Flutter architecture and leading delivery teams","Архитектура на Flutter и руководство командами поставки","Arquitectura Flutter y liderazgo de equipos de entrega","Flutter-architectuur en het leiden van opleverteams","BmeQZ7JyhRFIx8527WO2t1-WklP8AAvevAxiN9U4TEs",{"id":2726,"bio":2727,"expertise":2732,"extension":2505,"links":2744,"meta":2749,"metaDescription":2750,"name":2755,"ogDescription":2758,"photo":2763,"role":2764,"seniority":2627,"skills":2769,"slug":2770,"specialization":2771,"stem":2770,"__hash__":2776},"team_members\u002Froma.yaml",{"en":2728,"ru":2729,"es":2730,"nl":2731},"Roman works across native iOS and Android and [Flutter](\u002Ftechnologies\u002Fflutter), and pairs that mobile depth with [Python](\u002Ftechnologies\u002Fpython) and applied AI.\n\nMuch of his background is in ERP and CRM development — complex, data-heavy business systems where getting the domain model right matters more than the UI — which gives him a pragmatic eye for how an app fits the process behind it.\n","Роман работает с нативными iOS и Android и с [Flutter](\u002Ftechnologies\u002Fflutter), дополняя мобильную экспертизу [Python](\u002Ftechnologies\u002Fpython) и прикладным AI.\n\nЗначительная часть его опыта — разработка ERP и CRM, сложных систем с большим объёмом данных, где правильная доменная модель важнее интерфейса, — что даёт ему прагматичный взгляд на то, как приложение встраивается в процесс за ним.\n","Roman trabaja con iOS y Android nativos y con [Flutter](\u002Ftechnologies\u002Fflutter), y combina esa profundidad móvil con [Python](\u002Ftechnologies\u002Fpython) e IA aplicada.\n\nBuena parte de su trayectoria está en el desarrollo de ERP y CRM —sistemas de negocio complejos y con mucho dato, donde acertar con el modelo de dominio importa más que la interfaz—, lo que le da una mirada pragmática sobre cómo encaja una app en el proceso que hay detrás.\n","Roman werkt met native iOS en Android en met [Flutter](\u002Ftechnologies\u002Fflutter), en combineert die mobiele diepgang met [Python](\u002Ftechnologies\u002Fpython) en toegepaste AI.\n\nEen groot deel van zijn achtergrond ligt in ERP- en CRM-ontwikkeling — complexe, datazware bedrijfssystemen waarin het domeinmodel goed krijgen zwaarder weegt dan de interface — wat hem een pragmatische blik geeft op hoe een app in het proces erachter past.\n",[2733,2734,2739],{"en":2645,"ru":2646,"es":2647,"nl":2648},{"en":2735,"ru":2736,"es":2737,"nl":2738},"Applied AI","Прикладной AI","IA aplicada","Toegepaste AI",{"en":2740,"ru":2741,"es":2742,"nl":2743},"ERP and CRM systems","ERP- и CRM-системы","Sistemas ERP y CRM","ERP- en CRM-systemen",[2745,2747],{"type":2690,"url":2746},"https:\u002F\u002Fwww.linkedin.com\u002Fin\u002Fromanbatler\u002F",{"type":2508,"address":2748},"roma@nerdy.pro",{},{"en":2751,"ru":2752,"es":2753,"nl":2754},"Senior mobile developer at Nerdy Production — native iOS and Android, Flutter, applied AI, and a background in data-heavy ERP and CRM systems.","Старший мобильный разработчик Nerdy Production: нативные iOS и Android, Flutter, прикладной AI и опыт в ERP- и CRM-системах.","Desarrollador móvil senior en Nerdy Production: iOS y Android nativos, Flutter, IA aplicada y experiencia en sistemas ERP y CRM con gran volumen de datos.","Senior mobiele developer bij Nerdy Production — native iOS en Android, Flutter, toegepaste AI, en een achtergrond in datazware ERP- en CRM-systemen.",{"en":2756,"ru":2757,"es":2756,"nl":2756},"Roman","Рома",{"en":2759,"ru":2760,"es":2761,"nl":2762},"Senior mobile developer at Nerdy Production — native iOS and Android, Flutter, applied AI, and years of data-heavy ERP and CRM behind him.","Старший мобильный разработчик Nerdy Production: нативные iOS и Android, Flutter, прикладной AI и годы работы с нагруженными ERP и CRM.","Desarrollador móvil senior en Nerdy Production: iOS y Android nativos, Flutter, IA aplicada y años de ERP y CRM con mucha carga de datos.","Senior mobiele developer bij Nerdy Production — native iOS en Android, Flutter, toegepaste AI, en jaren datazware ERP en CRM achter zich.","\u002Fteam\u002Froma.webp",{"en":2765,"ru":2766,"es":2767,"nl":2768},"Senior Mobile Developer","Старший мобильный разработчик","Desarrollador móvil senior","Senior mobiele developer",[7,41,18,141,146,106],"roma",{"en":2772,"ru":2773,"es":2774,"nl":2775},"Mobile, AI, and ERP\u002FCRM systems","Мобильная разработка, AI и системы ERP\u002FCRM","Móvil, IA y sistemas ERP\u002FCRM","Mobiel, AI en ERP\u002FCRM-systemen","caPSPO2BX35G9lEjNb6p3U4uF_V7yh8cexCe6l5hm8Y",{"id":2778,"bio":2779,"expertise":2784,"extension":2505,"links":2479,"meta":2795,"metaDescription":2796,"name":2801,"ogDescription":2804,"photo":2809,"role":2810,"seniority":2627,"skills":2815,"slug":2816,"specialization":2817,"stem":2816,"__hash__":2822},"team_members\u002Fxsox.yaml",{"en":2780,"ru":2781,"es":2782,"nl":2783},"Eugene builds the systems that apps depend on. His background is in backend engineering — designing and running the APIs, data models, and services behind a product, primarily in [Python](\u002Ftechnologies\u002Fpython) and [Django](\u002Ftechnologies\u002Fdjango).\n\nHe also works in [Flutter](\u002Ftechnologies\u002Fflutter), so he can reason about a feature from the database to the device and build the backend so the app that consumes it stays simple.\n","Женя строит системы, на которые опираются приложения. Его основной опыт — бэкенд-инженерия: проектирование и эксплуатация API, моделей данных и сервисов за продуктом, в первую очередь на [Python](\u002Ftechnologies\u002Fpython) и [Django](\u002Ftechnologies\u002Fdjango).\n\nОн также работает с [Flutter](\u002Ftechnologies\u002Fflutter), поэтому может рассуждать о фиче от базы данных до устройства и строить бэкенд так, чтобы потребляющее его приложение оставалось простым.\n","Eugene construye los sistemas de los que dependen las apps. Su trayectoria está en la ingeniería backend: diseñar y operar las APIs, los modelos de datos y los servicios que hay detrás de un producto, principalmente en [Python](\u002Ftechnologies\u002Fpython) y [Django](\u002Ftechnologies\u002Fdjango).\n\nTambién trabaja con [Flutter](\u002Ftechnologies\u002Fflutter), así que puede razonar sobre una funcionalidad desde la base de datos hasta el dispositivo y construir el backend de forma que la app que lo consume siga siendo simple.\n","Eugene bouwt de systemen waar apps op leunen. Zijn achtergrond ligt in backend-engineering: de API's, datamodellen en services achter een product ontwerpen en draaien, vooral in [Python](\u002Ftechnologies\u002Fpython) en [Django](\u002Ftechnologies\u002Fdjango).\n\nHij werkt daarnaast met [Flutter](\u002Ftechnologies\u002Fflutter), zodat hij over een functie kan nadenken van de database tot het toestel en de backend zo kan bouwen dat de app die hem verbruikt eenvoudig blijft.\n",[2785,2790],{"en":2786,"ru":2787,"es":2788,"nl":2789},"API design","Проектирование API","Diseño de APIs","API-ontwerp",{"en":2791,"ru":2792,"es":2793,"nl":2794},"Data modelling","Моделирование данных","Modelado de datos","Datamodellering",{},{"en":2797,"ru":2798,"es":2799,"nl":2800},"Senior backend developer at Nerdy Production building the APIs, data models and services behind our apps, primarily in Python and Django.","Старший бэкенд-разработчик Nerdy Production: API, модели данных и сервисы за нашими приложениями, в первую очередь на Python и Django.","Desarrollador backend senior en Nerdy Production: las APIs, modelos de datos y servicios detrás de nuestras apps, sobre todo en Python y Django.","Senior backenddeveloper bij Nerdy Production die de API's, datamodellen en services achter onze apps bouwt, vooral in Python en Django.",{"en":2802,"ru":2803,"es":2802,"nl":2802},"Eugene Xsox","Женя Xsox",{"en":2805,"ru":2806,"es":2807,"nl":2808},"Senior backend developer at Nerdy Production — the APIs, data models and services our apps run on, mostly in Python and Django.","Старший бэкенд-разработчик Nerdy Production: API, модели данных и сервисы, на которых работают наши приложения, в основном на Python и Django.","Desarrollador backend senior en Nerdy Production: las APIs, modelos de datos y servicios sobre los que corren nuestras apps, en Python y Django.","Senior backenddeveloper bij Nerdy Production — de API's, datamodellen en services waarop onze apps draaien, vooral in Python en Django.","\u002Fteam\u002Fxsox.webp",{"en":2811,"ru":2812,"es":2813,"nl":2814},"Senior Backend Developer","Старший бэкенд-разработчик","Desarrollador backend senior","Senior backenddeveloper",[106,24,41,18,155,160,90,150],"xsox",{"en":2818,"ru":2819,"es":2820,"nl":2821},"Python\u002FDjango backends, plus Flutter","Бэкенды на Python\u002FDjango и Flutter","Backends en Python\u002FDjango, además de Flutter","Backends in Python\u002FDjango, plus Flutter","w_QAKKq_Mh_dtMvAxFpAJBC10PW1I7zgVOxELwRHwO8",[2824,2833,2840,2845,2855],{"id":2825,"extension":2505,"meta":2826,"name":2827,"slug":2831,"stem":2831,"__hash__":2832},"blog_topics\u002Fcybersecurity.yaml",{},{"en":2828,"ru":2829,"es":2830,"nl":2828},"Cybersecurity","Кибербезопасность","Ciberseguridad","cybersecurity","kt1rdsMy5W4b9MvGHm6mZVCr0inHidEuqaosPYmmk4E",{"id":2834,"extension":2505,"meta":2835,"name":2836,"slug":2838,"stem":2838,"__hash__":2839},"blog_topics\u002Fdevops.yaml",{},{"en":2837,"ru":2837,"es":2837,"nl":2837},"DevOps","devops","D3mxlZuFHKCGeszKZuWCiQmHmP5EiCvzg1qEAIQhnyU",{"id":2841,"extension":2505,"meta":2842,"name":2843,"slug":41,"stem":41,"__hash__":2844},"blog_topics\u002Fflutter.yaml",{},{"en":39,"ru":39,"es":39,"nl":39},"OOeALAmwFuEqByuJvTGk4g15FIHENPfYMdpfZh_HTAE",{"id":2846,"extension":2505,"meta":2847,"name":2848,"slug":2853,"stem":2853,"__hash__":2854},"blog_topics\u002Ffor-founders.yaml",{},{"en":2849,"ru":2850,"es":2851,"nl":2852},"For Founders","Для основателей","Para fundadores","Voor oprichters","for-founders","lp2u6Ol2qF4DGxpB83HxbbGzWioT-e40mJhD4lr28-U",{"id":2856,"extension":2505,"meta":2857,"name":2858,"slug":2863,"stem":2863,"__hash__":2864},"blog_topics\u002Fsoftware-engineering.yaml",{},{"en":2859,"ru":2860,"es":2861,"nl":2862},"Software Engineering","Разработка ПО","Ingeniería de software","Software-engineering","software-engineering","aZMb3aUDptoFQk_cEE6l5H4wrYcgZuBYUubmKqOAaaU",{"data":2866,"body":2867},{},{"type":2868,"children":2869},"root",[2870,2877,2895,2906,2933],{"type":2871,"tag":175,"props":2872,"children":2873},"element",{},[2874],{"type":2875,"value":2876},"text","Ilya founded Nerdy Production and leads its engineering. He has been building software since 2010 and shipping production Flutter since 2018.",{"type":2871,"tag":175,"props":2878,"children":2879},{},[2880,2882,2886,2888,2893],{"type":2875,"value":2881},"Before that he was CTO of QIWI, one of Russia's largest payment platforms, where he ran roughly 12 engineering teams spanning web products down to card processing, ",{"type":2871,"tag":698,"props":2883,"children":2885},{"slug":2884},"pci-dss",[],{"type":2875,"value":2887}," scope, and contactless payments — including building contactless card payments on Android via ",{"type":2871,"tag":698,"props":2889,"children":2891},{"slug":2890},"host-card-emulation",[2892],{"type":2875,"value":2680},{"type":2875,"value":2894}," over ISO\u002FIEC 14443, with EMV Contactless (Visa PayWave) on top.",{"type":2871,"tag":175,"props":2896,"children":2897},{},[2898,2900,2904],{"type":2875,"value":2899},"He was also a principal developer at Yandex, where he worked on Yandex.Auto — taking native Android deep into the vehicle, with heavy CAN-bus integration through a custom CAN shield — and a principal at Evotor, whose point-of-sale devices run on a forked ",{"type":2871,"tag":698,"props":2901,"children":2903},{"slug":2902},"aosp",[],{"type":2875,"value":2905},", giving him a low-level view of Android most app developers never touch.",{"type":2871,"tag":175,"props":2907,"children":2908},{},[2909,2911,2917,2919,2923,2925,2931],{"type":2875,"value":2910},"Today he leads delivery on the agency's flagship apps — from the chart-heavy fintech UI of ",{"type":2871,"tag":183,"props":2912,"children":2914},{"href":2913},"\u002Fportfolio\u002Fextraetf",[2915],{"type":2875,"value":2916},"ExtraETF",{"type":2875,"value":2918}," to the fully custom design system of ",{"type":2871,"tag":183,"props":2920,"children":2921},{"href":1823},[2922],{"type":2875,"value":1824},{"type":2875,"value":2924},". He writes most of the essays on this blog and maintains the agency's open-source work, including the ",{"type":2871,"tag":183,"props":2926,"children":2928},{"href":2927},"\u002Fopen-source\u002Fdxpdf",[2929],{"type":2875,"value":2930},"dxpdf",{"type":2875,"value":2932}," DOCX-to-PDF engine.",{"type":2871,"tag":175,"props":2934,"children":2935},{},[2936,2938,2943,2945,2950,2951,2956,2957,2962,2963,2968,2969,2974,2976,2981],{"type":2875,"value":2937},"He works across ",{"type":2871,"tag":183,"props":2939,"children":2941},{"href":2940},"\u002Ftechnologies\u002Fflutter",[2942],{"type":2875,"value":39},{"type":2875,"value":2944},", native iOS and Android, ",{"type":2871,"tag":183,"props":2946,"children":2948},{"href":2947},"\u002Ftechnologies\u002Fgo",[2949],{"type":2875,"value":49},{"type":2875,"value":1263},{"type":2871,"tag":183,"props":2952,"children":2954},{"href":2953},"\u002Ftechnologies\u002Frust",[2955],{"type":2875,"value":124},{"type":2875,"value":1263},{"type":2871,"tag":183,"props":2958,"children":2960},{"href":2959},"\u002Ftechnologies\u002Ftypescript",[2961],{"type":2875,"value":153},{"type":2875,"value":1263},{"type":2871,"tag":183,"props":2964,"children":2966},{"href":2965},"\u002Ftechnologies\u002Fkotlin",[2967],{"type":2875,"value":69},{"type":2875,"value":1263},{"type":2871,"tag":183,"props":2970,"children":2972},{"href":2971},"\u002Ftechnologies\u002Fkubernetes",[2973],{"type":2875,"value":78},{"type":2875,"value":2975},", and ",{"type":2871,"tag":183,"props":2977,"children":2979},{"href":2978},"\u002Ftechnologies\u002Fdocker",[2980],{"type":2875,"value":27},{"type":2875,"value":2982},", with a focus on app architecture, cross-platform delivery, and building teams that ship.",[2984,2996,3009,3024,3038,3052,3068,3080,3094,3107,3121,3134,3150,3162,3178,3190,3201,3211,3224,3234,3245,3260,3269,3282,3295,3302,3313,3325,3336,3351,3363,3376,3388,3400,3412,3424,3435,3446,3457,3468,3480,3490,3501,3514,3526,3535,3547,3559,3569,3580,3593,3602,3613],{"slug":2902,"term":2684,"definition":2985,"category":2986,"aliases":2987,"links":2989,"related":2993,"readMore":-1,"target":2994,"hasArticle":2995},"The Android Open Source Project — Android without the Google layer on top, which anyone may fork. Point-of-sale terminals, kiosks and in-car systems run on forks of it, and working at that level exposes parts of the OS an app developer never sees.","platform",[2988],"Android Open Source Project",[2990],{"kind":2991,"url":2992},"website","https:\u002F\u002Fsource.android.com\u002F",[2890],"\u002Fglossary#aosp",false,{"slug":2997,"term":2998,"definition":2999,"category":2986,"aliases":3000,"links":3001,"related":3005,"readMore":-1,"target":3008,"hasArticle":2995},"app-clips","App Clips","An Apple feature that runs a small slice of an iOS app — under 15 MB — without installing the whole thing. Invoked from a QR code, an NFC tag or a link, for when the first thing a user does should not require a store visit.",[],[3002],{"kind":3003,"url":3004},"documentation","https:\u002F\u002Fdeveloper.apple.com\u002Fapp-clips\u002F",[3006,3007],"deep-linking","install-referrer","\u002Fglossary#app-clips",{"slug":3010,"term":3011,"definition":3012,"category":2986,"aliases":3013,"links":3014,"related":3020,"readMore":-1,"target":3023,"hasArticle":2995},"bigquery","BigQuery","Google Cloud's analytics warehouse. You point SQL at billions of rows and it scans them in seconds, on storage held separately from the machines doing the querying — which is what keeps reporting and exploration off the database that is serving live traffic.",[],[3015,3017],{"kind":2991,"url":3016},"https:\u002F\u002Fcloud.google.com\u002Fbigquery",{"kind":3018,"url":3019},"wikipedia","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBigQuery",[3021,3022],"object-storage","elasticsearch","\u002Fglossary#bigquery",{"slug":3025,"term":3026,"definition":3027,"category":3028,"aliases":3029,"links":3033,"related":3036,"readMore":-1,"target":3037,"hasArticle":2995},"ci-cd","CI\u002FCD","Automation that builds, tests and ships every change without anyone running commands by hand. On mobile it is what turns a release into a button press instead of an afternoon of someone else being unavailable.","practice",[3030,3031,3032],"CI","continuous integration","continuous delivery",[3034],{"kind":3018,"url":3035},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCI\u002FCD",[],"\u002Fglossary#ci-cd",{"slug":3039,"term":3040,"definition":3041,"category":3042,"aliases":3043,"links":3045,"related":3048,"readMore":-1,"target":3051,"hasArticle":2995},"crud","CRUD","Create, read, update, delete — the four operations behind almost every form and admin screen. Shorthand for the routine data-management half of an app, as opposed to the parts carrying real domain logic.","architecture",[3044],"Create, Read, Update, Delete",[3046],{"kind":3018,"url":3047},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCreate,_read,_update_and_delete",[3049,3050],"rest","graphql","\u002Fglossary#crud",{"slug":3053,"term":3054,"definition":3055,"category":3042,"aliases":3056,"links":3061,"related":3064,"readMore":-1,"target":3067,"hasArticle":2995},"container-registry","Container registry","A hosted store for container images, addressed by name and tag — Docker Hub, GitHub Container Registry, or a cloud provider's own. Pushing a build there turns 'works on my machine' into an image anyone can pull and run unchanged.",[3057,3058,3059,3060],"image registry","Docker registry","GHCR","ghcr.io",[3062],{"kind":3003,"url":3063},"https:\u002F\u002Fdocs.github.com\u002Fen\u002Fpackages\u002Fworking-with-a-github-packages-registry\u002Fworking-with-the-container-registry",[3065,3066],"dev-container","multi-arch-image","\u002Fglossary#container-registry",{"slug":3006,"term":3069,"definition":3070,"category":2986,"aliases":3071,"links":3075,"related":3078,"readMore":3079,"target":3079,"hasArticle":396},"Deep linking","A link that opens a specific screen inside an installed app instead of its home screen or a web page. Deferred deep linking survives an install, so a tap that leads through the app store still lands on the right screen.",[3072,3073,3074],"deferred deep linking","universal links","Android App Links",[3076],{"kind":3018,"url":3077},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMobile_deep_linking",[2997,3007],"\u002Fglossary\u002Fdeep-linking",{"slug":3065,"term":3081,"definition":3082,"category":3028,"aliases":3083,"links":3087,"related":3092,"readMore":-1,"target":3093,"hasArticle":2995},"Dev Container","A development environment described once in devcontainer.json — the OS, tools, and runtime versions a project needs — and opened identically inside a container by every contributor's editor, instead of a setup guide everyone interprets differently.",[3084,3085,3086],"devcontainer.json","Dev Containers","VS Code Dev Containers",[3088,3090],{"kind":2991,"url":3089},"https:\u002F\u002Fcontainers.dev\u002F",{"kind":3003,"url":3091},"https:\u002F\u002Fcode.visualstudio.com\u002Fdocs\u002Fdevcontainers\u002Fcontainers",[3053],"\u002Fglossary#dev-container",{"slug":3022,"term":3095,"definition":3096,"category":2986,"aliases":3097,"links":3100,"related":3105,"readMore":-1,"target":3106,"hasArticle":2995},"Elasticsearch","A search and analytics engine that indexes records so they can be filtered and searched interactively instead of scanned. What you reach for when the question is \"show me these particular sessions, narrowed six ways\" rather than \"sum this column\".",[3098,3099],"Elastic","ELK",[3101,3103],{"kind":2991,"url":3102},"https:\u002F\u002Fwww.elastic.co\u002Felasticsearch",{"kind":3018,"url":3104},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FElasticsearch",[3010],"\u002Fglossary#elasticsearch",{"slug":3108,"term":3109,"definition":3110,"category":3042,"aliases":3111,"links":3114,"related":3117,"readMore":-1,"target":3120,"hasArticle":2995},"end-to-end-encryption","End-to-end encryption","Encryption applied on the sending device and undone only on the receiving one, so the service carrying the message cannot read it — not under subpoena, not after a breach. It protects the content and never the metadata.",[3112,3113],"E2EE","end-to-end encrypted",[3115],{"kind":3018,"url":3116},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEnd-to-end_encryption",[3118,3119],"tls","jwt","\u002Fglossary#end-to-end-encryption",{"slug":3122,"term":3123,"definition":3124,"category":3042,"aliases":3125,"links":3128,"related":3129,"readMore":-1,"target":3133,"hasArticle":2995},"fan-out","Fan-out","Reading an upstream source once and delivering each update to every client subscribed to it. The naive version writes to subscribers in a loop and stalls the moment one socket is slow; a real one buffers per client and drops whoever cannot keep up.",[3126,3127],"fanout","broadcast",[],[3130,3131,3132],"websocket","pub-sub","server-sent-events","\u002Fglossary#fan-out",{"slug":3135,"term":3136,"definition":3137,"category":3028,"aliases":3138,"links":3142,"related":3145,"readMore":-1,"target":3149,"hasArticle":2995},"feature-flags","Feature flags","Switches that turn functionality on or off from configuration rather than from a release. They let one binary behave differently per brand, market or user, and let a risky feature be shut off without shipping a new build through review.",[3139,3140,3141],"feature flag","feature toggle","feature gating",[3143],{"kind":3018,"url":3144},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFeature_toggle",[3146,3147,3148],"staged-rollout","white-label","multi-tenancy","\u002Fglossary#feature-flags",{"slug":3151,"term":3152,"definition":3153,"category":3042,"aliases":3154,"links":3157,"related":3160,"readMore":-1,"target":3161,"hasArticle":2995},"floating-point","Floating point","The IEEE 754 binary format behind double and float. It cannot hold 0.1 exactly, so 0.1 + 0.2 is 0.30000000000000004 — invisible in graphics and fatal in money, which belongs in integer minor units or a decimal type instead.",[3155,642,3156],"IEEE 754","floating-point arithmetic",[3158],{"kind":3018,"url":3159},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FIEEE_754",[],"\u002Fglossary#floating-point",{"slug":3163,"term":3164,"definition":3165,"category":3028,"aliases":3166,"links":3169,"related":3174,"readMore":-1,"target":3177,"hasArticle":2995},"gdpr","GDPR","The EU regulation covering personal data of people in the EU: a lawful basis for collecting it, real consent for tracking, and rights to see and delete it. It follows your users, not your servers, so it applies wherever the company is registered.",[3167,3168],"General Data Protection Regulation","data protection",[3170,3172],{"kind":2991,"url":3171},"https:\u002F\u002Fgdpr.eu\u002F",{"kind":3018,"url":3173},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGeneral_Data_Protection_Regulation",[2884,3175,3176],"soc-2","hipaa","\u002Fglossary#gdpr",{"slug":700,"term":3179,"definition":3180,"category":3028,"aliases":3181,"links":3185,"related":3188,"readMore":-1,"target":3189,"hasArticle":2995},"Golden test","A test that renders a widget and compares the result pixel for pixel against a stored reference image. In Flutter it is the cheapest way to answer whether a redesign broke the empty state at 320pt, in dark mode, at 200% text scale.",[3182,3183,3184],"golden tests","screenshot test","snapshot test",[3186],{"kind":3003,"url":3187},"https:\u002F\u002Fapi.flutter.dev\u002Fflutter\u002Fflutter_test\u002FmatchesGoldenFile.html",[3025],"\u002Fglossary#golden-test",{"slug":3050,"term":3191,"definition":3192,"category":3042,"aliases":3193,"links":3194,"related":3199,"readMore":-1,"target":3200,"hasArticle":2995},"GraphQL","A query language for APIs where the client names exactly the fields it wants and gets one response shaped to match. It removes the over-fetching REST endpoints drift into, and adds a failure mode of its own: an unbounded query that walks the whole data model.",[],[3195,3197],{"kind":2991,"url":3196},"https:\u002F\u002Fgraphql.org\u002F",{"kind":3018,"url":3198},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGraphQL",[3049],"\u002Fglossary#graphql",{"slug":3176,"term":3202,"definition":3203,"category":3028,"aliases":3204,"links":3206,"related":3209,"readMore":-1,"target":3210,"hasArticle":2995},"HIPAA","The US law governing protected health information — how it may be stored, transmitted, logged and disclosed. Like PCI-DSS it is an architectural constraint chosen at the start, not a policy document added before launch.",[3205],"Health Insurance Portability and Accountability Act",[3207],{"kind":3018,"url":3208},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHealth_Insurance_Portability_and_Accountability_Act",[2884,3163,3175],"\u002Fglossary#hipaa",{"slug":3212,"term":3213,"definition":3214,"category":3042,"aliases":3215,"links":3218,"related":3221,"readMore":-1,"target":3223,"hasArticle":2995},"headless-cms","Headless CMS","A content system with an editor and an API but no front end of its own. Editors publish in one place, and the site or app renders that content itself — so the presentation layer is yours rather than the CMS vendor's.",[3216,3217],"headless content management system","content API",[3219],{"kind":3018,"url":3220},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHeadless_content_management_system",[3222,3049],"server-side-rendering","\u002Fglossary#headless-cms",{"slug":2890,"term":2680,"definition":3225,"category":2986,"aliases":3226,"links":3229,"related":3232,"readMore":-1,"target":3233,"hasArticle":2995},"Letting an Android phone act as a contactless card over NFC in software, with no hardware secure element. It is how a wallet app pays at a terminal: the phone speaks the same EMV contactless protocol the plastic card would have.",[3227,2682,3228],"HCE","contactless payments",[3230],{"kind":3003,"url":3231},"https:\u002F\u002Fdeveloper.android.com\u002Fdevelop\u002Fconnectivity\u002Fnfc\u002Fhce",[2884,2902],"\u002Fglossary#host-card-emulation",{"slug":3235,"term":3236,"definition":3237,"category":2986,"aliases":3238,"links":3239,"related":3242,"readMore":-1,"target":3244,"hasArticle":2995},"impeller","Impeller","The rendering engine Flutter uses today, default on iOS since 2023 and on Android since 2024. It compiles its shaders ahead of time instead of during the first animation, which removed the shader-compilation jank that was Flutter's most visible production problem.",[],[3240],{"kind":3003,"url":3241},"https:\u002F\u002Fdocs.flutter.dev\u002Fperf\u002Fimpeller",[3243],"skia","\u002Fglossary#impeller",{"slug":3246,"term":3247,"definition":3248,"category":3249,"aliases":3250,"links":3254,"related":3257,"readMore":-1,"target":3259,"hasArticle":2995},"in-app-purchase","In-app purchase","Selling digital goods or a subscription through the Apple or Google billing that both stores require for digital content and take a commission on. The hard part is never the purchase; it is restoring it on a new device and keeping entitlement state honest.","business",[3251,3252,3253],"IAP","in-app purchases","in-app subscription",[3255],{"kind":3003,"url":3256},"https:\u002F\u002Fdeveloper.apple.com\u002Fin-app-purchase\u002F",[3258],"product-market-fit","\u002Fglossary#in-app-purchase",{"slug":3007,"term":3261,"definition":3262,"category":2986,"aliases":3263,"links":3264,"related":3267,"readMore":-1,"target":3268,"hasArticle":2995},"Install Referrer","A Google Play API that hands a freshly installed Android app the campaign parameters from the link that led to the install. The Android half of deferred deep linking, and the dependable way to attribute where a user came from.",[],[3265],{"kind":3003,"url":3266},"https:\u002F\u002Fdeveloper.android.com\u002Fgoogle\u002Fplay\u002Finstallreferrer",[3006,2997],"\u002Fglossary#install-referrer",{"slug":3119,"term":3270,"definition":3271,"category":3272,"aliases":3273,"links":3275,"related":3280,"readMore":-1,"target":3281,"hasArticle":2995},"JWT","A signed token carrying its own claims, so a server can tell who a request belongs to without looking a session up. Standard for mobile authentication. The signature proves it was not altered; it does not hide what is inside.","protocol",[3274],"JSON Web Token",[3276,3278],{"kind":2991,"url":3277},"https:\u002F\u002Fjwt.io\u002F",{"kind":3018,"url":3279},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FJSON_Web_Token",[2884],"\u002Fglossary#jwt",{"slug":3283,"term":3284,"definition":3285,"category":3028,"aliases":3286,"links":3290,"related":3293,"readMore":-1,"target":3294,"hasArticle":2995},"kyc","KYC","Know Your Customer — the identity checks a regulated financial product runs before it lets anyone move money: document capture, liveness, sanctions and anti-money-laundering screening. It shapes onboarding more than any design decision does.",[3287,3288,3289],"Know Your Customer","AML","KYC\u002FAML",[3291],{"kind":3018,"url":3292},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKnow_your_customer",[2884,3163],"\u002Fglossary#kyc",{"slug":76,"term":74,"definition":3296,"category":2986,"aliases":3297,"links":3299,"related":3300,"readMore":3301,"target":3301,"hasArticle":2995},"Sharing business logic written in Kotlin across Android, iOS and the server while each platform keeps its own native UI. The alternative to Flutter when the interface has to be native but the rules behind it do not.",[3298],"KMP",[],[],"\u002Ftechnologies\u002Fkmp",{"slug":3303,"term":3304,"definition":3305,"category":3249,"aliases":3306,"links":3308,"related":3311,"readMore":-1,"target":3312,"hasArticle":2995},"mvp","MVP","The smallest version of a product that can go in front of real users and still answer the question you built it to answer. A decision about scope, not about quality — an MVP still has to work.",[3307],"minimum viable product",[3309],{"kind":3018,"url":3310},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinimum_viable_product",[3147],"\u002Fglossary#mvp",{"slug":3066,"term":3314,"definition":3315,"category":3042,"aliases":3316,"links":3320,"related":3323,"readMore":-1,"target":3324,"hasArticle":2995},"Multi-architecture image","A single image tag that resolves to different binaries per CPU architecture — linux\u002Famd64 and linux\u002Farm64 are the common pair — so the same docker pull works unchanged on Intel\u002FAMD servers and Apple Silicon laptops.",[3317,3318,3319],"multi-arch build","multi-platform image","linux\u002Famd64 + linux\u002Farm64",[3321],{"kind":3003,"url":3322},"https:\u002F\u002Fdocs.docker.com\u002Fbuild\u002Fbuilding\u002Fmulti-platform\u002F",[3053],"\u002Fglossary#multi-arch-image",{"slug":3148,"term":3326,"definition":3327,"category":3042,"aliases":3328,"links":3331,"related":3334,"readMore":-1,"target":3335,"hasArticle":2995},"Multi-tenancy","One deployment serving many customers, each seeing only its own data, configuration and enabled features because tenant context is resolved per request. It is what makes a fleet of branded apps one product instead of many forks.",[3329,3330],"multi-tenant","tenant",[3332],{"kind":3018,"url":3333},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMultitenancy",[3147,3135],"\u002Fglossary#multi-tenancy",{"slug":3337,"term":3338,"definition":3339,"category":3272,"aliases":3340,"links":3344,"related":3349,"readMore":-1,"target":3350,"hasArticle":2995},"oauth","OAuth","The standard behind Sign in with Apple, Google and the rest: the user authorises your app at a provider they already trust, and your app receives a token instead of their password. Nobody invents a new credential and you never store one.",[3341,3342,3343],"OAuth 2.0","social login","Sign in with Apple",[3345,3347],{"kind":2991,"url":3346},"https:\u002F\u002Foauth.net\u002F2\u002F",{"kind":3018,"url":3348},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOAuth",[3119],"\u002Fglossary#oauth",{"slug":3021,"term":3352,"definition":3353,"category":3042,"aliases":3354,"links":3358,"related":3361,"readMore":-1,"target":3362,"hasArticle":2995},"Object storage","Storage that holds a whole file under a key rather than in a filesystem tree — Amazon S3 and the many services that speak its API. Cheap, effectively unlimited, and the usual home for raw events, backups and media: written once, read rarely, kept forever.",[3355,3356,3357],"S3","S3-compatible storage","blob storage",[3359],{"kind":3018,"url":3360},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FObject_storage",[3010],"\u002Fglossary#object-storage",{"slug":2884,"term":3364,"definition":3365,"category":3028,"aliases":3366,"links":3369,"related":3374,"readMore":-1,"target":3375,"hasArticle":2995},"PCI-DSS","The card industry security standard binding anyone who stores, processes or transmits card data. Most apps stay out of its scope on purpose, by handing card entry to a certified payment provider instead.",[3367,3368],"PCI DSS","Payment Card Industry Data Security Standard",[3370,3372],{"kind":2991,"url":3371},"https:\u002F\u002Fwww.pcisecuritystandards.org\u002F",{"kind":3018,"url":3373},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPayment_Card_Industry_Data_Security_Standard",[3119],"\u002Fglossary#pci-dss",{"slug":3377,"term":3378,"definition":3379,"category":2986,"aliases":3380,"links":3383,"related":3386,"readMore":-1,"target":3387,"hasArticle":2995},"platform-channels","Platform channels","The bridge a Flutter app uses to call native iOS and Android code — Keychain and Keystore, biometrics, payment sheets, any SDK without a Dart package. Routine work but real work, and the first place an engineer who never left Dart will stall.",[3381,3382],"platform channel","method channel",[3384],{"kind":3003,"url":3385},"https:\u002F\u002Fdocs.flutter.dev\u002Fplatform-integration\u002Fplatform-channels",[76],"\u002Fglossary#platform-channels",{"slug":3389,"term":3390,"definition":3391,"category":3272,"aliases":3392,"links":3395,"related":3398,"readMore":-1,"target":3399,"hasArticle":2995},"post-quantum-cryptography","Post-quantum cryptography","Encryption algorithms built to stay secure against a future quantum computer, now standardized by NIST. The migration is urgent ahead of the hardware because traffic captured today can be decrypted once such a machine exists.",[3393,3394],"PQC","post-quantum crypto",[3396],{"kind":3018,"url":3397},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPost-quantum_cryptography",[3118,3108],"\u002Fglossary#post-quantum-cryptography",{"slug":3258,"term":3401,"definition":3402,"category":3249,"aliases":3403,"links":3406,"related":3409,"readMore":-1,"target":3411,"hasArticle":2995},"Product-market fit","The point at which a product has demonstrably found people who want it — they use it, come back, and pay. Before it, engineering answers a question; after it, engineering answers demand.",[3404,3405],"PMF","product\u002Fmarket fit",[3407],{"kind":3018,"url":3408},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FProduct-market_fit",[3303,3410],"time-to-market","\u002Fglossary#product-market-fit",{"slug":3413,"term":3414,"definition":3415,"category":3028,"aliases":3416,"links":3418,"related":3421,"readMore":-1,"target":3423,"hasArticle":2995},"prompt-injection","Prompt injection","An attack where text supplied by a user is read by a language model as instructions rather than as data, steering it past its own rules. The LLM-era sibling of SQL injection, and it appears wherever user input is concatenated into a prompt.",[3417],"injection attack",[3419],{"kind":3018,"url":3420},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPrompt_injection",[3422],"rate-limiting","\u002Fglossary#prompt-injection",{"slug":3131,"term":3425,"definition":3426,"category":3042,"aliases":3427,"links":3430,"related":3433,"readMore":-1,"target":3434,"hasArticle":2995},"Pub\u002FSub","A messaging pattern where a producer publishes an event and any number of consumers read it independently, with a broker in between. The producer never waits for them, which is how a request path stays fast while slower work happens behind it.",[3428,3429],"publish\u002Fsubscribe","Google Cloud Pub\u002FSub",[3431],{"kind":3018,"url":3432},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPublish%E2%80%93subscribe_pattern",[],"\u002Fglossary#pub-sub",{"slug":3049,"term":3436,"definition":3437,"category":3042,"aliases":3438,"links":3441,"related":3444,"readMore":-1,"target":3445,"hasArticle":2995},"REST","The conventional style for HTTP APIs: a URL names a resource and the HTTP verb says what to do with it. The default way an app talks to a backend, and what most third-party integrations expect to find.",[3439,3440],"REST API","Representational State Transfer",[3442],{"kind":3018,"url":3443},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FREST",[3130,3132],"\u002Fglossary#rest",{"slug":3422,"term":3447,"definition":3448,"category":3028,"aliases":3449,"links":3452,"related":3455,"readMore":-1,"target":3456,"hasArticle":2995},"Rate limiting","A cap on how many requests one caller may make in a given window. It is what stops a single enthusiastic user, a scraper or a bot from spending a month of paid API budget in an afternoon, and it has to live on your side of the integration.",[3450,3451],"rate limit","throttling",[3453],{"kind":3018,"url":3454},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRate_limiting",[3413],"\u002Fglossary#rate-limiting",{"slug":3175,"term":3458,"definition":3459,"category":3028,"aliases":3460,"links":3463,"related":3466,"readMore":-1,"target":3467,"hasArticle":2995},"SOC 2","An external auditor report on how an organisation handles customer data — security, availability, confidentiality — rather than a certificate you buy. Enterprise buyers ask for it, and it constrains architecture long before the audit itself does.",[3461,3462],"SOC2","System and Organization Controls",[3464],{"kind":3018,"url":3465},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSystem_and_Organization_Controls",[2884,3163,3176],"\u002Fglossary#soc-2",{"slug":3469,"term":3470,"definition":3471,"category":3249,"aliases":3472,"links":3475,"related":3478,"readMore":-1,"target":3479,"hasArticle":2995},"saas","SaaS","Software sold as an ongoing subscription to a hosted product rather than as a one-off license the customer installs and runs. The vendor operates the servers, ships updates continuously, and bills per seat or per usage.",[3473,3474],"Software as a Service","software-as-a-service",[3476],{"kind":3018,"url":3477},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSoftware_as_a_service",[3148,3147],"\u002Fglossary#saas",{"slug":3132,"term":3481,"definition":3482,"category":3272,"aliases":3483,"links":3485,"related":3488,"readMore":-1,"target":3489,"hasArticle":2995},"Server-Sent Events","A one-way stream from server to client over an ordinary HTTP connection. Simpler than a WebSocket and enough wherever only the server has something to say — a progress feed, an AI response arriving token by token.",[3484],"SSE",[3486],{"kind":3018,"url":3487},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FServer-sent_events",[3130,3049],"\u002Fglossary#server-sent-events",{"slug":3222,"term":3491,"definition":3492,"category":3042,"aliases":3493,"links":3496,"related":3499,"readMore":-1,"target":3500,"hasArticle":2995},"Server-side rendering","Building a page as finished HTML on the server, so the first response already carries the content, headings, meta tags and structured data. Crawlers, link previews and slow devices read it without running JavaScript.",[3494,3495],"SSR","server-rendered",[3497],{"kind":3018,"url":3498},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FServer-side_scripting",[3212],"\u002Fglossary#server-side-rendering",{"slug":3243,"term":3502,"definition":3503,"category":2986,"aliases":3504,"links":3507,"related":3512,"readMore":-1,"target":3513,"hasArticle":2995},"Skia","The open-source 2D graphics library from Google that draws Chrome, Android and — until Impeller — every Flutter frame. It renders to PDF as well as to a screen, which is what print-to-PDF in Chrome is doing.",[3505,3506],"Skia Graphics Engine","skia-safe",[3508,3510],{"kind":2991,"url":3509},"https:\u002F\u002Fskia.org\u002F",{"kind":3018,"url":3511},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSkia_Graphics_Engine",[3235],"\u002Fglossary#skia",{"slug":3515,"term":3516,"definition":3517,"category":3249,"aliases":3518,"links":3522,"related":3523,"readMore":-1,"target":3525,"hasArticle":2995},"staff-augmentation","Staff augmentation","A hiring model where engineers from an outside partner join your team and work under your management — in your repository, your sprints, your process — instead of delivering a project of their own. You buy capacity; the code and the context stay with you.",[3519,3520,3521],"team augmentation","dedicated developers","outstaffing",[],[3524,3410],"total-cost-of-ownership","\u002Fglossary#staff-augmentation",{"slug":3146,"term":3527,"definition":3528,"category":3028,"aliases":3529,"links":3532,"related":3533,"readMore":-1,"target":3534,"hasArticle":2995},"Staged rollout","Releasing a build to a small percentage of users first and widening only once the crash-free rate holds. A bad build caught at ten percent is a bad afternoon; the same build at a hundred percent is a bad week.",[3530,3531],"phased release","canary release",[],[3135,3025],"\u002Fglossary#staged-rollout",{"slug":3536,"term":2491,"definition":3537,"category":3042,"aliases":3538,"links":3542,"related":3545,"readMore":-1,"target":3546,"hasArticle":2995},"state-management","How an app decides where a value lives, who is allowed to change it, and which parts of the screen redraw when it does. In Flutter the choice between Riverpod, BLoC and Provider is among the first architectural decisions and the hardest to revisit.",[3539,3540,3541],"state management","BLoC","Riverpod",[3543],{"kind":3003,"url":3544},"https:\u002F\u002Fdocs.flutter.dev\u002Fdata-and-backend\u002Fstate-mgmt\u002Foptions",[700],"\u002Fglossary#state-management",{"slug":3118,"term":3548,"definition":3549,"category":3272,"aliases":3550,"links":3554,"related":3557,"readMore":-1,"target":3558,"hasArticle":2995},"TLS","The encryption layer underneath HTTPS. It proves the server is who its certificate says, agrees a fresh key for the session, and encrypts everything after that — so the network in between sees ciphertext it cannot quietly alter.",[3551,3552,3553],"SSL","HTTPS","Transport Layer Security",[3555],{"kind":3018,"url":3556},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTransport_Layer_Security",[3108,3119],"\u002Fglossary#tls",{"slug":3410,"term":3560,"definition":3561,"category":3249,"aliases":3562,"links":3564,"related":3567,"readMore":-1,"target":3568,"hasArticle":2995},"Time to market","How long it takes to get a product from decision to real users. Most stack and scope arguments are really arguments about this number, because every week saved is a week of revenue, feedback and competitive position.",[3563,3410],"TTM",[3565],{"kind":3018,"url":3566},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTime_to_market",[3303,3524],"\u002Fglossary#time-to-market",{"slug":3524,"term":3570,"definition":3571,"category":3249,"aliases":3572,"links":3575,"related":3578,"readMore":-1,"target":3579,"hasArticle":2995},"Total cost of ownership","What a product costs across its whole life rather than to build once: maintenance, upgrades, annual OS and store migrations, and the second team you staff to keep two codebases in step. Usually larger than the build quote, and almost never inside it.",[3573,3574],"TCO","cost of ownership",[3576],{"kind":3018,"url":3577},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTotal_cost_of_ownership",[3410],"\u002Fglossary#total-cost-of-ownership",{"slug":3581,"term":2499,"definition":3582,"category":3272,"aliases":3583,"links":3585,"related":3590,"readMore":-1,"target":3592,"hasArticle":2995},"webrtc","The browser and mobile standard for sending audio, video and data directly between two devices, with servers involved only in introducing them to each other. It is what an in-app video call is built on when it is not a rented SDK.",[3584],"Web Real-Time Communication",[3586,3588],{"kind":2991,"url":3587},"https:\u002F\u002Fwebrtc.org\u002F",{"kind":3018,"url":3589},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWebRTC",[3591,3130],"xmpp","\u002Fglossary#webrtc",{"slug":3130,"term":3594,"definition":3595,"category":3272,"aliases":3596,"links":3597,"related":3600,"readMore":-1,"target":3601,"hasArticle":2995},"WebSocket","A protocol that holds one connection open between client and server so either side can send at any moment, instead of the client asking over and over. What live prices, chat and presence indicators run on.",[],[3598],{"kind":3018,"url":3599},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWebSocket",[3132,3049],"\u002Fglossary#websocket",{"slug":3147,"term":3603,"definition":3604,"category":3249,"aliases":3605,"links":3608,"related":3611,"readMore":3612,"target":3612,"hasArticle":396},"White-label","One product shipped under many brands. A white-label mobile platform builds each client a store-ready app with its own name, design and content from a single shared codebase, instead of forking the project per customer.",[3606,3607],"white label","multi-tenant app",[3609],{"kind":3018,"url":3610},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWhite-label_product",[3303],"\u002Fglossary\u002Fwhite-label",{"slug":3591,"term":3614,"definition":3615,"category":3272,"aliases":3616,"links":3619,"related":3624,"readMore":-1,"target":3625,"hasArticle":2995},"XMPP","An open, federated messaging protocol, and the long-standing alternative to writing a chat backend or renting one. It extends to presence, typing indicators and file transfer, and it is old enough that every platform has a mature client library.",[3617,3618],"Jabber","Extensible Messaging and Presence Protocol",[3620,3622],{"kind":2991,"url":3621},"https:\u002F\u002Fxmpp.org\u002F",{"kind":3018,"url":3623},"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FXMPP",[3581,3130],"\u002Fglossary#xmpp"]