Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/tanstack/table/column-sizingnpx skills add TanStack/table --skill column-sizinggit clone --depth 1 https://github.com/TanStack/tableWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00051 | $0.00536 |
| Opus 5 | $0.00026 | $0.00268 |
| Sonnet 5 | $0.00010 | $0.00107 |
| Haiku 4.5 | $0.00005 | $0.00054 |
Grade A, and why
column-sizing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
This skill builds on core and table-features. Sizing is numeric state; translating it to layout is a renderer decision.
Setup
import { columnSizingFeature, tableFeatures } from '@tanstack/table-core'
export const features = tableFeatures({ columnSizingFeature })
export const defaultColumn = { size: 180, minSize: 80, maxSize: 480 }
Core Patterns
cell.style.width = `${cell.column.getSize()}px`
tableElement.style.width = `${table.getTotalSize()}px`
Apply the same model sizes consistently to headers, cells, and pinned offsets.
Common Mistakes
[HIGH] Expecting state to style DOM
Wrong: const options = { defaultColumn: { size: 180 } }
Correct: cell.style.width = ${cell.column.getSize()}px``
Numeric state does not apply CSS to headless markup.
Source: docs/framework/react/guide/column-sizing.md#column-size-apis
[HIGH] Passing CSS sizes into numeric APIs
Wrong: const column = { size: '25%' }
Correct: const column = { size: 240 }
Table sizing state is numeric; percentages and auto layout belong in renderer CSS.
Source: packages/table-core/src/features/column-sizing/columnSizingFeature.types.ts
[HIGH] Letting content override offsets
Wrong: cell.style.minWidth = 'max-content'
Correct: cell.style.width = ${column.getSize()}px; cell.style.overflow = 'hidden'
If rendered width differs from the model, totals and pinning offsets no longer match geometry.
Source: examples/react/column-sizing/src/main.tsx
API Discovery
Inspect node_modules/@tanstack/table-core/dist/features/column-sizing/ for defaults and region-aware offset signatures.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 69 lines · 51 tokens per session scan A d4a335583fc1
column-sizing is a skill published in the GitHub repository TanStack/table (28,393 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 536 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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