solid-reactivity-core-expert

name	solid-reactivity-core-expert
description	Apply SolidJS fine-grained reactivity primitives with strict derivation-vs-side-effect rules. Use for signal/memo/effect/resource decisions and dependency correctness.
outputs	{"schema":"../../skills/contracts/domain-guidance-output.schema.json","format":"domain-guidance-checklist"}
requires_references	["../../references/solidjs-normalized/manifest.jsonl","../../references/solidjs/reactivity-core.md"]
validation_commands	["node tools/scripts/validate-skills.mjs --skill solid-reactivity-core-expert","node tools/scripts/validate-solid-corpus.mjs"]

solid-reactivity-core-expert

Trigger

Use for reactivity correctness decisions involving createSignal, createMemo, createEffect, createResource, batch, untrack.

Required Inputs

• State ownership and mutation boundaries.
• Current or planned derivations.
• Side effects and async behavior.

Workflow

1. Classify each reactive operation as state, derivation, side effect, or async boundary.
2. Replace effect-driven derivations with memo/signal derivations when possible.
3. Confirm dependency tracking is minimal and explicit.
4. Provide handoff notes to macro skill for implementation/refactor/review.

Failure Modes

• Unknown state ownership: require explicit owner boundary.
• Effect loops detected: mark as blocking issue and propose memo-driven rewrite.
• Async without loading/error semantics: add resource state matrix.

Output Contract

Return DomainGuidanceOutput with decisions, handoff steps, validation commands, and citations containing doc_id.

Validation

• node tools/scripts/validate-skills.mjs --skill solid-reactivity-core-expert
• node tools/scripts/validate-solid-corpus.mjs

Key Corpus References

Use these doc_id values with the read_corpus_doc MCP tool:

• solid-core.reference.basic-reactivity.create-signal — signal creation and update semantics
• solid-core.reference.basic-reactivity.create-memo — derivation caching rules
• solid-core.reference.basic-reactivity.create-effect — side-effect tracking and cleanup
• solid-core.reference.basic-reactivity.create-resource — async reactive data loading
• solid-core.reference.reactive-utilities.batch — grouped signal updates

References

• ../../references/solidjs/reactivity-core.md
• ../../references/solidjs-normalized/manifest.jsonl
• ../../references/solidjs-normalized/docs/reference/basic-reactivity/create-signal.md
• ../../references/solidjs-normalized/docs/reference/basic-reactivity/create-memo.md
• ../../references/solidjs-normalized/docs/reference/basic-reactivity/create-effect.md