WebAssembly/component-model

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Repository for design and specification of the Component Model

Stars: 1.4k
Forks: 130
Open beginner issues: 0
Indexed issues: 132
Avg merge: 2d 1h
Merged PRs (30d): 15

Dominant language: WebAssembly
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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132 open issues indexed

Anonymous union as a specialization of variant to support common web APIs Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#724 · 9 comments · Opened Sep 17, 2026
🪙 Value text encoding ambiguities / quirks Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

WebAssembly/component-model#718 · 1 comment · Opened Sep 9, 2026
WIT: declare as a package-scope type, apply with `@annotate` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#695 · 1 comment · Opened Aug 12, 2026
WIT: allow type declarations at package scope Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

WebAssembly/component-model#694 · 1 comment · Opened Aug 12, 2026
Provide a synchronous constructor for non-empty streams Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

WebAssembly/component-model#677 · 1 comment · Opened Jul 16, 2026
flags: support flags that are just combinations of other flags, not taking a new bit. Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

WebAssembly/component-model#660 · 6 comments · 1 reaction · Opened Jun 4, 2026
Add the ability for threads to manually set their "current task" Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#659 · 15 comments · Opened May 28, 2026
stream.forward/splice sketch Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

WebAssembly/component-model#658 · 11 comments · Opened May 26, 2026
Importing console_log should not break the WebAssembly Compoenent Model Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#634 · 7 comments · Opened Apr 8, 2026
WIT: Import/Export inconsistencies Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

WebAssembly/component-model#629 · 13 comments · Opened Apr 1, 2026
Question about instances Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#621 · 21 comments · Opened Mar 11, 2026
Non-blocking I/O without cancellation Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#617 · 22 comments · Opened Mar 5, 2026
Awkward lack of borrowing on variants that contain resources Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#615 · 25 comments · Opened Feb 25, 2026
WIT should have the same expressivity power as the component model Open

pre-1.0

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#614 · 4 comments · 5 reactions · Opened Feb 25, 2026
Consider adding an opt-in mechanism to request that a host keeps a task alive Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#612 · 2 reactions · Opened Feb 20, 2026
Gracefully ending a component-in-progress, e.g. batching metrics Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#611 · 1 reaction · Opened Feb 20, 2026
Adding a note to WIT.md about WIT interface version interop & host downgrades Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

WebAssembly/component-model#609 · 2 comments · 1 reaction · Opened Feb 11, 2026
Consider WIT extension to avoid superfluous names when defining custom component imports/exports Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#598 · 7 comments · 1 reaction · Opened Jan 15, 2026
Unify wit's stance on trailing commas Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

WebAssembly/component-model#586 · 4 comments · 4 reactions · Opened Dec 19, 2025
Enhancing the Canonical ABI with Finer-Grained, Performant Type Layouts for IoT and Performance-Sensitive Environments Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#581 · 7 comments · Opened Dec 11, 2025
Use formal wit syntax within doc? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

WebAssembly/component-model#579 · 1 comment · Opened Dec 5, 2025
Logo Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#574 · 1 comment · Opened Oct 31, 2025
Consistent version syntax Open

pre-1.0

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#573 · 4 comments · 1 reaction · Opened Oct 27, 2025
Upstream Wasmtime's async test suite Open

WebAssembly/component-model#571 · 1 reaction · 1 assignee · Opened Oct 21, 2025
Memory mapping in the Component Model Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#568 · 2 comments · 1 reaction · Opened Oct 15, 2025
Component model & GC Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#566 · 5 comments · 2 reactions · Opened Sep 23, 2025
What's the best way to model OOP-style inheritance in WIT? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#564 · 1 comment · Opened Sep 12, 2025
More options for deriving worlds Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#563 · 1 comment · Opened Sep 11, 2025
wit: Propagate feature gate annotations to inner items Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

WebAssembly/component-model#559 · 4 comments · 2 reactions · Opened Aug 29, 2025
Idea: cheap trivial streams / futures Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#556 · 3 comments · Opened Aug 20, 2025
Optional Imports Phase 1: Tooling Conventions Open

0.3.x

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#555 · 7 comments · 2 reactions · Opened Aug 19, 2025
Package declaration syntax clarity Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

WebAssembly/component-model#549 · 5 comments · Opened Jul 31, 2025
Is it possible to mix imported and exported resources? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#544 · 7 comments · Opened Jul 12, 2025
User-defined generic types (parametric polymorphism) Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

WebAssembly/component-model#543 · 3 comments · Opened Jul 11, 2025
Incorrect references to SemVer Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

WebAssembly/component-model#540 · Opened Jul 1, 2025
Interface version / compatibilty changes Open

0.3.x

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#534 · 3 comments · Opened Jun 24, 2025
Function parameter documentation Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

WebAssembly/component-model#533 · 4 comments · Opened Jun 23, 2025
Pre-Proposal: Wasm GC Support in the Canonical ABI Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#525 · 30 comments · 17 reactions · Opened Jun 3, 2025
First-class modules Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#523 · 2 comments · Opened Jun 2, 2025
Inconsistent semi colons on wit file Include's when renaming via `with` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

WebAssembly/component-model#518 · 5 comments · Opened May 16, 2025
Idea: support post-trap call traces for guest interpreters Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#502 · 5 comments · 1 reaction · Opened Apr 17, 2025
Refactor binary encoding of canon builtins for easier future extensibilty Open

pre-1.0

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#496 · 1 reaction · Opened Apr 8, 2025
Loosing information and possible discrepancy in the WIT specs Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

WebAssembly/component-model#488 · 4 comments · 1 reaction · Opened Apr 1, 2025
Proposal: Component Model v0 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

WebAssembly/component-model#479 · 6 comments · 1 reaction · Opened Mar 24, 2025
async: Is it possible to have a background task? Open

0.3.x

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#460 · 2 comments · Opened Feb 28, 2025
Non-exhaustive enums, variants, records, function params Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

WebAssembly/component-model#454 · 7 comments · Opened Feb 24, 2025
Optimization: Shorter option binary representation via invalid value (e.g. -1 == None of option<resource>) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#437 · 3 comments · 1 reaction · Opened Jan 11, 2025
Single-module components Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#435 · 3 comments · 3 reactions · Opened Jan 9, 2025
Give components their own file type Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#432 · 6 comments · Opened Dec 21, 2024
question: are refinement types viable? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

WebAssembly/component-model#429 · 6 comments · Opened Dec 12, 2024

WebAssembly/component-model

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