Name: with-tanstack-virtual
Rating: 69.6 (1 reviews)
Author: TanStack

with-tanstack-virtual

Virtualize Lit Table final row or column models with @tanstack/lit-virtual VirtualizerController, host lifecycle-aware counts, scroll refs, stable keys, dynamic measurement, sticky CSS, grid/flex sizing, and infinite data. Load for large rendered tables; Virtual is renderer composition, not tableFeatures.

Quality

85%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

Securityby

Passed

No findings from the security scan

Quality

Content

87%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, highly actionable skill body with executable code and concrete mistake corrections that respects the token budget. Its one weakness is the absence of a sequenced workflow with validation checkpoints for the virtualization lifecycle.

Suggestions

Add a short numbered workflow with an explicit validation checkpoint (e.g. after binding the virtualizer count, confirm rows.length === virtualItems count before rendering).

Include a verify/retry feedback loop for the measurement and scroll-sync operations to satisfy the batch-operation feedback-loop expectation.

Dimension	Reasoning	Score
Conciseness	Lean and efficient throughout: a compact executable setup block plus terse pattern/m mistake entries with no padding and no explanation of concepts Claude already knows; every section earns its place.	5 / 5
Actionability	Fully executable copy-paste-ready setup code, concrete Wrong/Correct pairs for each mistake, and precise API-discovery commands pointing at real dist type files — covering the common cases specifically.	5 / 5
Workflow Clarity	The body organizes guidance as patterns and mistakes rather than a sequenced workflow, and provides no explicit validation/feedback-loop steps for the batch scroll-and-measure operations it describes.	3 / 5
Progressive Disclosure	Under 50 lines with no bundle files and well-organized sections (Setup, Core Patterns, Common Mistakes, API Discovery); per the simple-skills note this is appropriately structured for discovery.	5 / 5
	Total	18 / 20 Passed

Description

83%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A specific, well-scoped description that names concrete capabilities and gives a usable trigger, distinguishing itself clearly from sibling skills. The main gap is the 'when' guidance, which uses 'Load for' instead of an explicit 'Use when…' phrasing.

Suggestions

Add an explicit 'Use when…' clause naming the natural trigger phrases users would say (e.g. 'Use when rendering large Lit tables that need row/column virtualization or infinite scrolling').

Soften the jargon ('host lifecycle-aware counts', 'grid/flex sizing') with a couple of plain-language synonyms so non-expert users match the skill.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'Virtualize Lit Table final row or column models', 'host lifecycle-aware counts', 'scroll refs', 'stable keys', 'dynamic measurement', 'sticky CSS', 'grid/flex sizing', and 'infinite data' — giving comprehensive coverage of capabilities.	5 / 5
Completeness	Provides a clear 'what' (the capability list) and an explicit 'when' ('Load for large rendered tables'), but the trigger is phrased as 'Load for' rather than the canonical 'Use when…' form, so it is not maximally explicit.	4 / 5
Trigger Term Quality	Good domain keywords ('virtualize', 'large rendered tables', 'infinite data') with a usable trigger ('Load for large rendered tables'), but the language is jargon-heavy and missing a few natural phrasings users would actually say.	4 / 5
Distinctiveness Conflict Risk	A clear niche — Lit Table virtualization with @tanstack/lit-virtual — plus the explicit disambiguator 'Virtual is renderer composition, not tableFeatures' makes conflict with other skills minimal.	5 / 5
	Total	18 / 20 Passed

Validation

87%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	14 / 16 Passed

Repository: TanStack/table
Path: packages/lit-table/skills/with-tanstack-virtual/SKILL.md
Commit: 21d713f

Reviewed: 6 hours ago

Table of Contents

Discovery Implementation Validation

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.