Callstack
@callstack.com
We ship cross-platform products at AI speed. React Native Core Contributors and React Foundation Founding Members. Hosts of @reactuniverseconf.com
Get to know us at www.callstack.com
Get to know us at www.callstack.com
An agentic workflow needs a recovery path. We introduced an invalid commit reference, routed the review feedback back to the Developer agent, verified the correction, and then sent the task to human approval.
See the case study 👉 clstk.com/4hn7Lgd
See the case study 👉 clstk.com/4hn7Lgd
September 24, 2026 at 10:35 AM
An agentic workflow needs a recovery path. We introduced an invalid commit reference, routed the review feedback back to the Developer agent, verified the correction, and then sent the task to human approval.
See the case study 👉 clstk.com/4hn7Lgd
See the case study 👉 clstk.com/4hn7Lgd
Sharing a lot of code does not automatically give you one mobile product. Share the layers whose behavior should stay consistent. Keep platform differences explicit, with owners and tests.
React Native at Scale 2026 explains how experienced teams make that call: clstk.com/4xY0cmB
React Native at Scale 2026 explains how experienced teams make that call: clstk.com/4xY0cmB
September 22, 2026 at 1:53 PM
Sharing a lot of code does not automatically give you one mobile product. Share the layers whose behavior should stay consistent. Keep platform differences explicit, with owners and tests.
React Native at Scale 2026 explains how experienced teams make that call: clstk.com/4xY0cmB
React Native at Scale 2026 explains how experienced teams make that call: clstk.com/4xY0cmB
5x to 10x WebGPU speedups.
Hugging Face is testing a browser AI inference engine using agent-written, device-optimized WebGPU kernels.
Nico Martin joins Mike Grabowski to discuss the early work and what it could mean for Transformers.js.
Watch React Universe On Air 🎙️ clstk.com/4xZLZpU
Hugging Face is testing a browser AI inference engine using agent-written, device-optimized WebGPU kernels.
Nico Martin joins Mike Grabowski to discuss the early work and what it could mean for Transformers.js.
Watch React Universe On Air 🎙️ clstk.com/4xZLZpU
September 15, 2026 at 12:36 PM
5x to 10x WebGPU speedups.
Hugging Face is testing a browser AI inference engine using agent-written, device-optimized WebGPU kernels.
Nico Martin joins Mike Grabowski to discuss the early work and what it could mean for Transformers.js.
Watch React Universe On Air 🎙️ clstk.com/4xZLZpU
Hugging Face is testing a browser AI inference engine using agent-written, device-optimized WebGPU kernels.
Nico Martin joins Mike Grabowski to discuss the early work and what it could mean for Transformers.js.
Watch React Universe On Air 🎙️ clstk.com/4xZLZpU
A React Native migration for a crypto trading platform gave coding agents project-specific skills, access to simulators and devices, and React DevTools context. This made engineering standards reusable across teams. Read the case study to learn more at clstk.com/4xgK6Uo
September 11, 2026 at 8:44 AM
A React Native migration for a crypto trading platform gave coding agents project-specific skills, access to simulators and devices, and React DevTools context. This made engineering standards reusable across teams. Read the case study to learn more at clstk.com/4xgK6Uo
We routed verifiable tasks to autonomous agents and kept visual judgment in an engineer-guided Codex loop. The case study covers the workflow behind an under-one-month launch and up to 3x estimated acceleration: clstk.com/4gFcWJj
September 8, 2026 at 6:44 AM
We routed verifiable tasks to autonomous agents and kept visual judgment in an engineer-guided Codex loop. The case study covers the workflow behind an under-one-month launch and up to 3x estimated acceleration: clstk.com/4gFcWJj
Which AI tasks belong in the browser? @nico.dev from Hugging Face covers Transformers.js, ONNX Runtime, WebGPU, model caching, fallbacks, and browser agents. See which tasks are ready for on-device use and where the limits are. Watch & read shownotes at clstk.com/4qXHf1f
Running AI in the Browser With Transformers.js
Nico Martin explains how Transformers.js uses WebGPU and ONNX to run AI in the browser, plus the limits of local models and on-device agents.
clstk.com
September 7, 2026 at 12:10 PM
Which AI tasks belong in the browser? @nico.dev from Hugging Face covers Transformers.js, ONNX Runtime, WebGPU, model caching, fallbacks, and browser agents. See which tasks are ready for on-device use and where the limits are. Watch & read shownotes at clstk.com/4qXHf1f
Background removal and transcription run in the browser. Nico Martin from Huggin Face joins @grabbou.com to cover Transformers.js today, device limits, offline use, and which parts of an agent workflow can already run locally.
📺 YouTube premiere: youtu.be/elAVSra9KCY
📆 Sept 7 at 2PM CEST
📺 YouTube premiere: youtu.be/elAVSra9KCY
📆 Sept 7 at 2PM CEST
September 4, 2026 at 7:15 AM
Background removal and transcription run in the browser. Nico Martin from Huggin Face joins @grabbou.com to cover Transformers.js today, device limits, offline use, and which parts of an agent workflow can already run locally.
📺 YouTube premiere: youtu.be/elAVSra9KCY
📆 Sept 7 at 2PM CEST
📺 YouTube premiere: youtu.be/elAVSra9KCY
📆 Sept 7 at 2PM CEST
Ruben Casas from Postman has a few words for you ahead of Agent Conf.
In his talk, he’ll explore the emerging spectrum of generative UI, from static templates & configuration-driven interfaces to interfaces authored on the fly by LLMs.
Get your ticket: www.agent.sh/tickets
In his talk, he’ll explore the emerging spectrum of generative UI, from static templates & configuration-driven interfaces to interfaces authored on the fly by LLMs.
Get your ticket: www.agent.sh/tickets
September 3, 2026 at 1:08 PM
Ruben Casas from Postman has a few words for you ahead of Agent Conf.
In his talk, he’ll explore the emerging spectrum of generative UI, from static templates & configuration-driven interfaces to interfaces authored on the fly by LLMs.
Get your ticket: www.agent.sh/tickets
In his talk, he’ll explore the emerging spectrum of generative UI, from static templates & configuration-driven interfaces to interfaces authored on the fly by LLMs.
Get your ticket: www.agent.sh/tickets
React Native can give teams one shared codebase. Still, it does not decide who owns upgrades, releases, or the shared setup.
We combined 10 years of experience with perspectives from 12 organizations in React Native at Scale 2026: clstk.com/4r1ELPt
We combined 10 years of experience with perspectives from 12 organizations in React Native at Scale 2026: clstk.com/4r1ELPt
September 3, 2026 at 12:36 PM
React Native can give teams one shared codebase. Still, it does not decide who owns upgrades, releases, or the shared setup.
We combined 10 years of experience with perspectives from 12 organizations in React Native at Scale 2026: clstk.com/4r1ELPt
We combined 10 years of experience with perspectives from 12 organizations in React Native at Scale 2026: clstk.com/4r1ELPt
We wrote up how we embedded React Native inside a .NET MAUI app using a brownfield setup.
The article covers packaging, lifecycle wiring, MAUI Shell navigation, and shared state across both runtimes.
Read the article: clstk.com/4zNHvny
The article covers packaging, lifecycle wiring, MAUI Shell navigation, and shared state across both runtimes.
Read the article: clstk.com/4zNHvny
September 2, 2026 at 2:42 PM
We wrote up how we embedded React Native inside a .NET MAUI app using a brownfield setup.
The article covers packaging, lifecycle wiring, MAUI Shell navigation, and shared state across both runtimes.
Read the article: clstk.com/4zNHvny
The article covers packaging, lifecycle wiring, MAUI Shell navigation, and shared state across both runtimes.
Read the article: clstk.com/4zNHvny
Zuzanna Skoczylas from Sierra has a few words for you ahead of Agent Conf 2026. In her talk, she’ll share three lessons from building and shipping production agents: context engineering, the agent loop, and benchmarking model reliability.
Tickets: www.agent.sh/tickets
Tickets: www.agent.sh/tickets
September 1, 2026 at 12:34 PM
Zuzanna Skoczylas from Sierra has a few words for you ahead of Agent Conf 2026. In her talk, she’ll share three lessons from building and shipping production agents: context engineering, the agent loop, and benchmarking model reliability.
Tickets: www.agent.sh/tickets
Tickets: www.agent.sh/tickets
Registering a native module twice can crash a React Native app.
Our Super App Showcase prevents that by keeping native code in the Host Shell. Mini Apps stay JavaScript-only and load when needed with Re.Pack and Module Federation.
Read more about it: clstk.com/4gsofo3
Our Super App Showcase prevents that by keeping native code in the Host Shell. Mini Apps stay JavaScript-only and load when needed with Re.Pack and Module Federation.
Read more about it: clstk.com/4gsofo3
August 31, 2026 at 7:28 AM
Registering a native module twice can crash a React Native app.
Our Super App Showcase prevents that by keeping native code in the Host Shell. Mini Apps stay JavaScript-only and load when needed with Re.Pack and Module Federation.
Read more about it: clstk.com/4gsofo3
Our Super App Showcase prevents that by keeping native code in the Host Shell. Mini Apps stay JavaScript-only and load when needed with Re.Pack and Module Federation.
Read more about it: clstk.com/4gsofo3
One request now starts the automated React Native Evals run.
Airflow runs each solver/judge pair separately. MLflow keeps the run record and files together. Human review still decides what gets published.
Here’s how we built it 👉 clstk.com/4wMcgqh
Airflow runs each solver/judge pair separately. MLflow keeps the run record and files together. Human review still decides what gets published.
Here’s how we built it 👉 clstk.com/4wMcgqh
August 27, 2026 at 6:25 AM
One request now starts the automated React Native Evals run.
Airflow runs each solver/judge pair separately. MLflow keeps the run record and files together. Human review still decides what gets published.
Here’s how we built it 👉 clstk.com/4wMcgqh
Airflow runs each solver/judge pair separately. MLflow keeps the run record and files together. Human review still decides what gets published.
Here’s how we built it 👉 clstk.com/4wMcgqh
Lech Kalinowski from Callstack is joining Agent Conf in Warsaw as a speaker.
Together with Artur Morys-Magiera (@artus9033.bsky.social), he’ll present a case study of Apex and look at the impact of quantization on LLM performance.
Get your ticket: www.agent.sh/tickets
Together with Artur Morys-Magiera (@artus9033.bsky.social), he’ll present a case study of Apex and look at the impact of quantization on LLM performance.
Get your ticket: www.agent.sh/tickets
August 27, 2026 at 5:05 AM
Lech Kalinowski from Callstack is joining Agent Conf in Warsaw as a speaker.
Together with Artur Morys-Magiera (@artus9033.bsky.social), he’ll present a case study of Apex and look at the impact of quantization on LLM performance.
Get your ticket: www.agent.sh/tickets
Together with Artur Morys-Magiera (@artus9033.bsky.social), he’ll present a case study of Apex and look at the impact of quantization on LLM performance.
Get your ticket: www.agent.sh/tickets
Native iOS & Android engineers are needed in React Native apps.Most code can live in TypeScript, but teams need to dive into platform capabilities for better UX.
The focus changes: native engineers solve complex platform challenges, while RN devs stay productive shipping features for 2 platforms.
The focus changes: native engineers solve complex platform challenges, while RN devs stay productive shipping features for 2 platforms.
August 24, 2026 at 2:01 PM
Native iOS & Android engineers are needed in React Native apps.Most code can live in TypeScript, but teams need to dive into platform capabilities for better UX.
The focus changes: native engineers solve complex platform challenges, while RN devs stay productive shipping features for 2 platforms.
The focus changes: native engineers solve complex platform challenges, while RN devs stay productive shipping features for 2 platforms.
Jakub Kuzimski from Allegro will speak at AgentConf 2026 on Stop Making LLMs Deterministic. Building a Spec-Driven Software Factory at Allegro.
Join us in Warsaw on September 17-18: www.agent.sh/agenda
Join us in Warsaw on September 17-18: www.agent.sh/agenda
August 21, 2026 at 12:19 PM
Jakub Kuzimski from Allegro will speak at AgentConf 2026 on Stop Making LLMs Deterministic. Building a Spec-Driven Software Factory at Allegro.
Join us in Warsaw on September 17-18: www.agent.sh/agenda
Join us in Warsaw on September 17-18: www.agent.sh/agenda
We keep migration knowledge in six versioned files:
1. `MIGRATION.md`,
2. `SCREENS.tsv`,
3. `STATE_AND_STORAGE.tsv`,
4. `DEPENDENCIES.tsv`,
5. `EVENTS.tsv`,
6. `PARITY_CHECKS.md`.
Teams review them in spreadsheets and Git. Agents use them for each task.
Download the guide 👉 clstk.com/4quxRSF
1. `MIGRATION.md`,
2. `SCREENS.tsv`,
3. `STATE_AND_STORAGE.tsv`,
4. `DEPENDENCIES.tsv`,
5. `EVENTS.tsv`,
6. `PARITY_CHECKS.md`.
Teams review them in spreadsheets and Git. Agents use them for each task.
Download the guide 👉 clstk.com/4quxRSF
August 21, 2026 at 10:22 AM
We keep migration knowledge in six versioned files:
1. `MIGRATION.md`,
2. `SCREENS.tsv`,
3. `STATE_AND_STORAGE.tsv`,
4. `DEPENDENCIES.tsv`,
5. `EVENTS.tsv`,
6. `PARITY_CHECKS.md`.
Teams review them in spreadsheets and Git. Agents use them for each task.
Download the guide 👉 clstk.com/4quxRSF
1. `MIGRATION.md`,
2. `SCREENS.tsv`,
3. `STATE_AND_STORAGE.tsv`,
4. `DEPENDENCIES.tsv`,
5. `EVENTS.tsv`,
6. `PARITY_CHECKS.md`.
Teams review them in spreadsheets and Git. Agents use them for each task.
Download the guide 👉 clstk.com/4quxRSF
Last night in Cambridge, around 80 people joined us for Agentic AI in the Wild with Qodo Dev Community, ReactVision, and Codex Community Boston.
Talks covered code quality, local validation, spatial computing, and large codebase migration. Thanks to everyone who came!
Talks covered code quality, local validation, spatial computing, and large codebase migration. Thanks to everyone who came!
August 19, 2026 at 2:01 PM
Last night in Cambridge, around 80 people joined us for Agentic AI in the Wild with Qodo Dev Community, ReactVision, and Codex Community Boston.
Talks covered code quality, local validation, spatial computing, and large codebase migration. Thanks to everyone who came!
Talks covered code quality, local validation, spatial computing, and large codebase migration. Thanks to everyone who came!
Give agents two migration tasks:
1. Preserve native behavior
2. Refactor into idiomatic React Native
A different agent reviews between passes. The team compares both apps on devices and repeats the checks after refactoring.
Download the guide 👉 clstk.com/3So6LzM
1. Preserve native behavior
2. Refactor into idiomatic React Native
A different agent reviews between passes. The team compares both apps on devices and repeats the checks after refactoring.
Download the guide 👉 clstk.com/3So6LzM
August 19, 2026 at 2:00 PM
Give agents two migration tasks:
1. Preserve native behavior
2. Refactor into idiomatic React Native
A different agent reviews between passes. The team compares both apps on devices and repeats the checks after refactoring.
Download the guide 👉 clstk.com/3So6LzM
1. Preserve native behavior
2. Refactor into idiomatic React Native
A different agent reviews between passes. The team compares both apps on devices and repeats the checks after refactoring.
Download the guide 👉 clstk.com/3So6LzM
Why do camera features break even on devices that technically support them? Marc Rousavy breaks down a problem every team runs into once camera work gets more advanced: HDR, 5K & 120 FPS may all be supported, but that does not mean those settings will work together. Full episode: clstk.com/4ibuX2Y
August 19, 2026 at 5:44 AM
Why do camera features break even on devices that technically support them? Marc Rousavy breaks down a problem every team runs into once camera work gets more advanced: HDR, 5K & 120 FPS may all be supported, but that does not mean those settings will work together. Full episode: clstk.com/4ibuX2Y
Meet George Nikolaropoulos from Natech Banking Solutions at AgentConf 2026.
He’ll share how agentic engineering helped Natech deliver Snappi, Greece’s first ECB-licensed neobank, in less than a year, and what that meant for software delivery, product scale, and day-to-day operations.
He’ll share how agentic engineering helped Natech deliver Snappi, Greece’s first ECB-licensed neobank, in less than a year, and what that meant for software delivery, product scale, and day-to-day operations.
August 18, 2026 at 1:04 PM
Meet George Nikolaropoulos from Natech Banking Solutions at AgentConf 2026.
He’ll share how agentic engineering helped Natech deliver Snappi, Greece’s first ECB-licensed neobank, in less than a year, and what that meant for software delivery, product scale, and day-to-day operations.
He’ll share how agentic engineering helped Natech deliver Snappi, Greece’s first ECB-licensed neobank, in less than a year, and what that meant for software delivery, product scale, and day-to-day operations.
David Mokos from Expo has a few words for you ahead of Agent Conf 2026.
He’ll talk about what changes when AI agents become the primary users of developer tools, from interfaces and documentation to evaluation and feedback.
Find David’s talk and plan your two days in Warsaw: www.agent.sh/agenda
He’ll talk about what changes when AI agents become the primary users of developer tools, from interfaces and documentation to evaluation and feedback.
Find David’s talk and plan your two days in Warsaw: www.agent.sh/agenda
August 17, 2026 at 12:22 PM
David Mokos from Expo has a few words for you ahead of Agent Conf 2026.
He’ll talk about what changes when AI agents become the primary users of developer tools, from interfaces and documentation to evaluation and feedback.
Find David’s talk and plan your two days in Warsaw: www.agent.sh/agenda
He’ll talk about what changes when AI agents become the primary users of developer tools, from interfaces and documentation to evaluation and feedback.
Find David’s talk and plan your two days in Warsaw: www.agent.sh/agenda
Meet Susmita Singh from Google at AgentConf 2026.
She’ll show how to implement cryptographic memory signing, context-aware access controls, and adversarial memory sanitization to build agents that remember safely.
Get a ticket: www.agent.sh/tickets
She’ll show how to implement cryptographic memory signing, context-aware access controls, and adversarial memory sanitization to build agents that remember safely.
Get a ticket: www.agent.sh/tickets
August 13, 2026 at 11:49 AM
Meet Susmita Singh from Google at AgentConf 2026.
She’ll show how to implement cryptographic memory signing, context-aware access controls, and adversarial memory sanitization to build agents that remember safely.
Get a ticket: www.agent.sh/tickets
She’ll show how to implement cryptographic memory signing, context-aware access controls, and adversarial memory sanitization to build agents that remember safely.
Get a ticket: www.agent.sh/tickets
Come to Warsaw a day early for a free hands-on workshop with Amazon’s Giovanni Laquidara.
Build a Software (re)Factory that works across Claude Code, Cursor, Codex, and GitHub Copilot.
📆 September 16, 2026
🕙 10:00–14:30
📍 Crowne Plaza Warsaw – The HUB
Sign up 👉 www.agent.sh/workshop
Build a Software (re)Factory that works across Claude Code, Cursor, Codex, and GitHub Copilot.
📆 September 16, 2026
🕙 10:00–14:30
📍 Crowne Plaza Warsaw – The HUB
Sign up 👉 www.agent.sh/workshop
August 12, 2026 at 1:43 PM
Come to Warsaw a day early for a free hands-on workshop with Amazon’s Giovanni Laquidara.
Build a Software (re)Factory that works across Claude Code, Cursor, Codex, and GitHub Copilot.
📆 September 16, 2026
🕙 10:00–14:30
📍 Crowne Plaza Warsaw – The HUB
Sign up 👉 www.agent.sh/workshop
Build a Software (re)Factory that works across Claude Code, Cursor, Codex, and GitHub Copilot.
📆 September 16, 2026
🕙 10:00–14:30
📍 Crowne Plaza Warsaw – The HUB
Sign up 👉 www.agent.sh/workshop
Brownfield keeps the current app live but adds a boundary between two runtimes.
Greenfield moves the risk to cutover.
A third option starts greenfield, tests representative flows, and keeps a fallback into the native hosts.
Download the guide: clstk.com/3TSBOEp
Greenfield moves the risk to cutover.
A third option starts greenfield, tests representative flows, and keeps a fallback into the native hosts.
Download the guide: clstk.com/3TSBOEp
August 12, 2026 at 12:04 PM
Brownfield keeps the current app live but adds a boundary between two runtimes.
Greenfield moves the risk to cutover.
A third option starts greenfield, tests representative flows, and keeps a fallback into the native hosts.
Download the guide: clstk.com/3TSBOEp
Greenfield moves the risk to cutover.
A third option starts greenfield, tests representative flows, and keeps a fallback into the native hosts.
Download the guide: clstk.com/3TSBOEp