WebML WG/CG F2F Agenda - TPAC 2025 (Kobe, Japan)

[anssiko]

Working Group / Community Group F2F

10-11 November 2025 - 00:00-07:45 UTC / 09:00-16:45 JST

Logistics

• ✅ Registration: open until 3 November 2025
  • See also: registration fee waivers
• 🏨 Venue: Kobe International Conference Center in-person & remote
  • All WebML WG/CG participants and invited guests welcome!
• 📞 Remote joining instructions: see Invite > Joining Instructions (1 wk prior)
• ✍️ IRC web client: #webmachinelearning
• 🗓️ Invites: invite 10 November 2025, invite 11 November 2025
• ✍️ Minutes: minutes 10 November 2025, minutes 11 November 2025

[DRAFT] Agenda

This is a Living Agenda. Feedback and suggestions for F2F topics welcome via comments for both TBA topics (To Be Announced) and timing to avoid scheduling conflicts. F2F issues are triaged as Agenda+.

10 November 2025: 🧠 Web Neural Network API

Important

Meeting schedule in Japan Standard Time (JST). Remote participants, please note the meeting may start on 9 November in your timezone.

See the timezone table ...

San Francisco	Sun, 9 November 2025	16:00
Boston	Sun, 9 November 2025	19:00
London	Mon, 10 November 2025	00:00
Berlin	Mon, 10 November 2025	01:00
Helsinki	Mon, 10 November 2025	02:00
Shanghai	Mon, 10 November 2025	08:00
Kobe	Mon, 10 November 2025	09:00
UTC	Mon, 10 November 2025	00:00 UTC

See also: other locations

▶️ 09:00 (JST) Start

👋 Welcome

• Intros
• Agenda bashing

📘 Charter orientation

Tip

Working Group home | charter
Community Group home | charter
Web Machine Learning umbrella site | GH org

• WG and CG interplay
• Current scopes, future aspirations
• New deliverables
• Coordination with other groups

⏳ Spec orientation

Tip

WebNN API spec | explainer | open issues

• Triage pass through open issues (triage guidance):
  • breaking changes
  • priorities
  • next steps for the key issues
  • ...

⏸️ 10:30 (JST) Break

Drinks and snacks at Reception Hall, 3F, 4F, 5F.

▶️ 11:00 (JST) Resume

✨ New features

TBA 2-4 key new features for discussion, optional presentations. Possible topics: new ops, new data types, quantization, device selection, capability detection, core operator set, MLTensor, MLGraph cache, KV cache optimization, CPU-NPU-GPU interop, fusion, any LM-specific requirements ...

Proposed topics:

• Core operator set webnn#573:
  • extend with attentions, MoE, TopK, MatMulNBits ... or fuse
  • performance vs. code complexity assessment results
• Support flexible input sizes webnn#883: dynamic shape types
• 🏷️ Device selection: seek consensus on scope
• 1-2 topics can still fit in

⏸️ 12:30 (JST) Lunch

Lunch at Portopia Hotel, South wing, Ohwada 2/3, 1F.

▶️ 13:30 (JST) Resume

📢 Customer feedback & collaborations

Tip

See WebNN Awasome for community feedback, demos, presentations, samples, testimonials, tutorials, videos, and more.

TBA Discuss customer feedback, including end-users, frameworks, independent software vendors.

🤝 Interop and technical cross-group coordination

Tip

WebNN implementation report | wpt test suite

• Web Platform Tests coverage, open issues.
• TBA Interop issues arising from backend implementation differences that warrant WebNN spec changes.
• TBA Technical coordination topics with WebGPU, WebAssembly, WebRTC, other groups.

🚀 Implementation plans and trials

Tip

WebNN implementation status by:

• Operations
• Framework integrations
• Backends: Lite RT, Windows ML, Core ML
• Hardware accelerators

See also:

• High-level arch diagram

Next step for implementations, Origin Trial or equivalent, new requirements or feedback from updates in backends, frameworks.

Kick off this session with demos that exercise diverse hardware accelerators:

• WebNN via ONNX Runtime Web:
  • Segment Anything (GPU / NPU)
  • Whisper Base (GPU / NPU)
  • Stable Diffusion Turbo (GPU / NPU)
• WebNN via Transformers.js:
  • Depth Anything (GPU / NPU)
  • MODNet (GPU / NPU)
  • YOLO12n (GPU / NPU)

Possible discussion topics:

• TBA Browser vendors' trials
• Backends: Windows ML, LiteRT, MLDrift, Core ML
• Frameworks: ONNX Runtime Web, Transformers.js, LiteRT.js

⏸️ 15:00 (JST) Break

Drinks and snacks at Reception Hall, 3F, 4F, 5F.

▶️ 15:30 (JST) Resume

Horizontals

Get to know experts behind horizontal groups.

😇 Ethics

• Ethical Principles for Web Machine Learning as a joint deliverable with the Web & AI Interest Group @dontcallmedom

🌱 Sustainability

• Sustainable Web Interest Group collaboration @TzviyaSiegman @mgifford?
• Web Sustainability Guidelines @AlexDawsonUK @mgifford?
• Related: Evaluate sustainability impact webnn#861

🔍 Privacy

• From Privacy Interest Group to Privacy Working Group, what's new? @tjwhalen
• Review privacy mitigations with privacy experts

🔒 Security

• Threat modeling with the Security Interest Group: AI in the Browser @simoneonofri
• Review security mitigations with security experts

🫶 Wrap up

• Synthesis of key outcomes, next steps

⏹️ 16:45 (JST) End

• 🍱 Group dinner

11 November 2025: 🧪 Incubations: WebMCP, Built-in AI APIs

Meeting schedule in Japan Standard Time (JST). Remote participants, please note the meeting may start on 10 November in your timezone.

See the timezone table ...

San Francisco	Mon, 10 November 2025	16:00
Boston	Mon, 10 November 2025	19:00
London	Tue, 11 November 2025	00:00
Berlin	Tue, 11 November 2025	01:00
Helsinki	Tue, 11 November 2025	02:00
Shanghai	Tue, 11 November 2025	08:00
Kobe	Tue, 11 November 2025	09:00
UTC	Tue, 11 November 2025	00:00 UTC

See also: other locations

▶️ 09:00 (JST) Start

👋 Welcome

• Intros
• Agenda bashing

🤖 WebMCP

• WebMCP intro & demo!
• TBA 3-4 key open issues

Tip

WebMCP main explainer | Service Workers explainer | early implementation experience

⏸️ 10:30 (JST) Break

Drinks and snacks at Reception Hall, 3F, 4F, 5F.

▶️ 11:00 (JST) Resume

🤖 WebMCP

• TBA 2-3 key open issues

Proposed topics:

• WebMCP accessibility, ARIA mapping via Declarative API @michael-n-cooper?
• Threat modeling with the Security Interest Group: Agentic AI Web Browser @simoneonofri, Lethal trifecta @johannhof
• TAG design review, meet with the TAG Communication with the TAG webmcp#35
• AI Agent Protocol Community Group coordination

⏸️ 12:30 (JST) Lunch

Lunch at Portopia Hotel, South wing, Ohwada 2/3, 1F.

▶️ 13:30 (JST) Resume

💬 Prompt API

Tip

Prompt API spec | explainer

• TAG design review redux Prompt API w3ctag/design-reviews#1093
• TBA 2-3 key open issues

✍️ Writing Assistance APIs

Tip

Writing Assistance APIs spec | explainer

• TBA 2-3 key open issues

⏸️ 15:00 (JST) Break

Drinks and snacks at Reception Hall, 3F, 4F, 5F.

▶️ 15:30 (JST) Resume

🌍 Translator and Language Detector APIs

Tip

Translator and Language Detector APIs spec | explainer

• TBA 2-3 key open issues

🔎 Proofreader API

Tip

Proofreader API explainer

• TBA 2-3 key open issues

🌱 Proposals for new incubations

• Review and discuss any new proposals:
  • MCP-UI

🫶 Wrap up

• Synthesis of key outcomes, next steps

⏹️ 16:45 (JST) End

• 🍣 Group dinner

[anssiko]

Quoting what is said above to drive the point home:

This is a Living Agenda. Feedback welcome via comments for both TBA topics (To Be Announced) and timing to avoid scheduling conflicts.

[anssiko]

@simoneonofri to identify and propose the right experts to participate in the security discussions from the Security Interest Group and Threat Modeling Community Group.

[anssiko]

I've added Device selection as a F2F topic we want to build consensus on. This falls under the "new features" session. Thank you @mtavenrath and the NVIDIA team for offering to help with this feature.

Further agenda topic proposals welcome via comments in this issue, or via direct email to me.

[anssiko]

@michael-n-cooper, the WebML CG would welcome a11y experts interested in agentic web features to join us at TPAC F2F #35 to discuss how the agentic web feature WebMCP could help improve accessibility. We've now exploring a complementary Declarative API #26 for it and are looking into ARIA mappings. This a11y discussion is currently slated for 11 November 2025 11:00 JST.

[anssiko]

We have added a slew of compelling WebNN demos to the "Implementation plans and trials" session on Monday. From this demo session, we'll transition to discuss browser vendors' trial plans, dissect the latest implementation experience across the layers to inform the WebNN spec development.