tanstack-form-composition

tanstack-form-composition is a skill for Claude Code from suxrobGM/jobpilot. It costs 158 tokens per session (2,747 once invoked), scanned A, original, MIT.

A guide for changing React forms built with TanStack Form from manually passed form objects to its official composition approach. It keeps field names and values checked by TypeScript, which helps catch form wiring mistakes while coding.

In plain words
What is it for?
Use it to migrate React forms that pass a form object through components, replace erased form types, and use typed field components.
Why use it?
It removes repeated form props, unsafe type casts, and field wrappers that hide the form's real types. This makes shared form sections easier to reuse and maintain.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to migrate React forms that pass a form object through components, replace erased form types, and use typed field components.

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Install with agentmods
npx agentmods add skills/suxrobgm/jobpilot/tanstack-form-composition
Install

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.

Any agent
npx skills add suxrobGM/jobpilot --skill tanstack-form-composition
Clone the repo
git clone --depth 1 https://github.com/suxrobGM/jobpilot

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 158 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,747 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00158 $0.02747
Opus 5.5 $0.00063 $0.01099
Sonnet 5.5 $0.00032 $0.00549
Haiku 4.5 $0.00016 $0.00275

Measured 1mo ago against content hash dbc3ca56931c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tanstack-form-composition 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 1mo ago.

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.

.claude/skills/tanstack-form-composition/SKILL.md · 268 lines

How it starts

The opening of the file, as written. The whole thing — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TanStack Form → composition API migration

Convert a React project using @tanstack/react-form from raw useForm + prop-drilled field wrappers + an any-erased form type to the createFormHook composition API. The payoff: typed field names/values, deletion of the erased form type and every as unknown as <ErasedForm> cast, and bound field components consumed as field.TextField instead of <FieldWrapper form={form} name=… />.

This is for the React adapter. Solid/Vue/Angular have the same API shape with different hook names - the concepts below port directly.

When this applies

The codebase has most of these symptoms:

  • An erased form type alias, e.g. type AnyForm = ReactFormExtendedApi<any,any,…> (12 any generics), used as a prop type and reached via form as unknown as AnyForm.
  • Field components that accept form + name props and internally render <form.Field name={name}>…</form.Field>.
  • Shared "section" components that receive the whole form as a prop and are reused across multiple parent forms (e.g. a settings form and an onboarding wizard).
  • Helper functions that take the form and call getFieldValue/setFieldValue.

If the project does not yet use @tanstack/react-form, stop - this skill migrates an existing TanStack Form codebase; it does not introduce the library.

Method

Work in four phases. Do recon fully before editing; build the shared infra once; then migrate call sites; then delete the erased type and verify. On a large repo, migrate one simple form end-to-end first as a reference, then fan out.

Phase 0 - Recon

Confirm the version and map the blast radius. Run (adapt paths):

  • Dependency: grep package.json for @tanstack/react-form (need v1+; createFormHook, createFormHookContexts, withForm are stable in v1).
  • Form-creation sites: search useForm(.
  • The erased type + casts: search the alias name and as unknown as.
  • Existing field wrappers: the directory of components taking form/name props.
  • Shared sections: components whose props include the erased form type.
  • Form-consuming helpers: functions whose parameter is the erased form type.

Read the full file on GitHub · 268 lines

Changes

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.

  1. 1mo ago First seen · 268 lines · 158 tokens per session scan A dbc3ca56931c

Subscribe to this mod's changes

tanstack-form-composition is a skill published in the GitHub repository suxrobGM/jobpilot (96 stars, last pushed 13d ago), licensed MIT. It adds 158 tokens to every session and 2,747 once invoked, about $0.0006 per session on Opus 5.5. 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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