How do I install the Svelte Foundation skill?

Run npx skillmds@latest add ryan-brosas/svelte-foundation in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Svelte Foundation safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Svelte Foundation?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Svelte Foundation free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Svelte Foundation?

ryan-brosas (@ryan-brosas) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Svelte Foundation by ryan-brosas — Agent Skill

Name: Svelte Foundation
Author: ryan-brosas

Svelte Foundation

Use when porting or reimplementing a push-mark/pull-verify signals runtime, a batched effect scheduler (microtask flush with synchronous escape), lazy derived caching with version counters, concurrent "time-travelling" async batches, a linked-list effect tree with pause/resume branch semantics, or the consumption planes over them — prop accessor factories with spread/rest proxies, store-to-signal subscription bridges, await-block flatten/context-save suspension, derived-owned effect freeze/unfreeze, and keyed-each single-pass reconciliation — as proven by svelte's client runtime (`packages/svelte/src/internal/client/{reactivity,runtime.js,dom/blocks}`). Source code and direct tests are ground truth; references carry decisive excerpts and graph retrieval.

ryan-brosas 2edd79e 13 files · 55.2 KB Updated Sep 17, 2026

File contents

Svelte: signals runtime & reactivity kernel foundation

Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is historical, revision-pinned evidence rather than timeless guidance. Current project source, tests, requirements, and runtime behavior outrank this projection and decide what ships.

Provenance and revision

Source record: svelte; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
Recorded revision: main@15720b16a5ef33e3e1f4301c77b94ec375070e73.
Full provenance, coverage caveats, boundaries, and preserved evidence: references/index.md.

Topic map

Representative topics: Write path; Flush machine; Root scheduling; Time travel; Derived pull; Effect tree; Props; Stores.
Scope and retrieval questions: references/index.md#use-this-for.
Complete capsule chooser: references/index.md#load-the-matching-source-dump.
Detailed grouped map: references/index.md#capsule-map.
Source limitations and portability boundaries: references/index.md#boundaries.

Retrieval

Open the index, choose one capsule matching the active question, and load only that capsule. Revalidate its cited source and revision before relying on it. Do not bulk-load the inventory, treat historical claims as current truth, or apply this foundation as a procedure.

---name: svelte-foundationdescription: Use when porting or reimplementing a push-mark/pull-verify signals runtime, a batched effect scheduler (microtask flush with synchronous escape), lazy derived caching with version counters, concurrent "time-travelling" async batches, a linked-list effect tree with pause/resume branch semantics, or the consumption planes over them — prop accessor factories with spread/rest proxies, store-to-signal subscription bridges, await-block flatten/context-save suspension, derived-owned effect freeze/unfreeze, and keyed-each single-pass reconciliation — as proven by svelte's client runtime (`packages/svelte/src/internal/client/{reactivity,runtime.js,dom/blocks}`). Source code and direct tests are ground truth; references carry decisive excerpts and graph retrieval.---# Svelte: signals runtime & reactivity kernel foundation## Foundation contractThis is a cold, source-specific foundation, not an operational procedure. It ishistorical, revision-pinned evidence rather than timeless guidance. Currentproject source, tests, requirements, and runtime behavior outrank thisprojection and decide what ships.## Provenance and revision- Source record: `svelte`; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.- Recorded revision: `main@15720b16a5ef33e3e1f4301c77b94ec375070e73`.- Full provenance, coverage caveats, boundaries, and preserved evidence: `references/index.md`.## Topic map- Representative topics: Write path; Flush machine; Root scheduling; Time travel; Derived pull; Effect tree; Props; Stores.- Scope and retrieval questions: `references/index.md#use-this-for`.- Complete capsule chooser: `references/index.md#load-the-matching-source-dump`.- Detailed grouped map: `references/index.md#capsule-map`.- Source limitations and portability boundaries: `references/index.md#boundaries`.## RetrievalOpen the index, choose one capsule matching the active question, and load onlythat capsule. Revalidate its cited source and revision before relying on it. Donot bulk-load the inventory, treat historical claims as current truth, or applythis foundation as a procedure.

Frequently asked questions