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bug: Host value is not updated

triage

Status: Open.

#6610 In stenciljs/core;

· henrijoss opened on Feb 23, 2026

bug: Components that use mixins with private/protected members do not have their types added to dist

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

Bug

#6608 In stenciljs/core;

· kyleMessnerLillyContractor opened on Feb 20, 2026

bug: Mixin issues when working with slots

Bug: ValidatedThis PR or Issue is verified to be a bug within StencilThis PR or Issue is verified to be a bug within Stencil

Status: Open.

Bug

#6607 In stenciljs/core;

· blakeplumb opened on Feb 20, 2026

bug: Hydrate runtime crashes with external SSR DOMs that do not implement <code>attachShadow</code> (Angular SSR + Domino)

Good First IssueThis is a good first issue for someone wantng to contribute to Stencil!This is a good first issue for someone wantng to contribute to Stencil!

Help Wanted

Status: Open.

#6605 In stenciljs/core;

· SebastianKohler opened on Feb 20, 2026

bug: watch rebuild hangs due to Rollup fileOperationQueue deadlock (bundled Rollup 4.34.9)

Bug: ValidatedThis PR or Issue is verified to be a bug within StencilThis PR or Issue is verified to be a bug within Stencil

Status: Open.

Bug

#6602 In stenciljs/core;

· adrianschmidt opened on Feb 18, 2026

bug: Jest 30 Support: Documentation Claims Support but Version Check Blocks It

triage

Status: Open.

#6599 In stenciljs/core;

· michaelsouellette opened on Feb 16, 2026

v5 Breaking Changes Proposals / Discussion

Status: Open.

#6584 In stenciljs/core;

· johnjenkins opened on Feb 4, 2026

feat: Upgrade to Node v24

Good First IssueThis is a good first issue for someone wantng to contribute to Stencil!This is a good first issue for someone wantng to contribute to Stencil!

Help Wanted

Status: Open.

#6578 In stenciljs/core;

· Avcharov opened on Feb 2, 2026

Problems with <code>@stencil/core@&gt;4.38.3</code> + <code>@stencil/playwright@0.2.1</code>

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

Bug

#6562 In stenciljs/core;

· deleonio opened on Jan 22, 2026

bug: Two-way binding broken between Angular template-driven forms and Stencil

ionitron: needs reproductionThis PR or Issue does not have a reproduction case URLThis PR or Issue does not have a reproduction case URL

Status: Open.

Bug

#6554 In stenciljs/core;

· fredppro opened on Jan 16, 2026

feat: StencilJS MCP Server

Feature: Want this? Upvote it!This PR or Issue may be a great consideration for a future idea.This PR or Issue may be a great consideration for a future idea.

Help Wanted

Status: Open.

Feature

#6518 In stenciljs/core;

· MrGrigri opened on Dec 30, 2025

chore: rename <code>cmp.test.tsx</code> files in <code>wdio</code> directory to have unique names for debugging purposes

Good First IssueThis is a good first issue for someone wantng to contribute to Stencil!This is a good first issue for someone wantng to contribute to Stencil!

Help Wanted

Status: Open.

Task

#6407 In stenciljs/core;

· jttommy opened on Oct 2, 2025