Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated Python 3.13+ conventions for application and library code. Use when writing or reviewing Python typing, protocols, generics, finite states, optional values, exceptions, serialized-data validation, package exports, import layout, typed distributions, async resource ownership, async pagination, or…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated React conventions for component boundaries, state ownership, derived values, explicit rendering, event work, external-system effects, memoization, context, and native forms. Use when creating or reviewing React components, hooks, conditional UI, form submission flows, state-sharing boundaries, or useEffect…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated TanStack Query conventions for React server state: resolved-view boundaries, query ownership, cache identity, disabled inputs, actor-scoped data, mutations, form submissions, and invalidation. Use when creating or reviewing useQuery or useMutation hooks, query keys, fetch functions, mutation callbacks…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated TanStack Table v9 beta conventions for React table schema, per-table behavior, typed metadata, and header/cell/footer rendering. Use when creating or reviewing useTable tables, column definitions, row actions, table feature metadata, or FlexRender rendering in React.
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated TypeScript conventions for inference-first typing, precise contracts, finite-state modelling, exhaustive decisions, and strict handling of optional or untrusted values. Use when writing or reviewing TypeScript types, state transitions, API signatures, schema-adjacent parsing, array or regular-expression…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated Valibot conventions for wire-schema ownership, nullability, tagged variants, transformations, and explicit validation-failure behavior. Use when defining or reviewing Valibot schemas, validating forms or HTTP payloads, parsing JSON or persisted data, or deciding whether invalid input aborts or becomes an…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated Zod v4 conventions for schema ownership, format validation, nullability, tagged unions, object-key contracts, transformations, and explicit validation-failure behavior. Use when defining or reviewing Zod schemas, validating forms or HTTP payloads, parsing JSON or persisted data, rendering validation…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated conventions for authoring, restructuring, and reviewing agent skills. Use when deciding whether guidance belongs in SKILL.md, a conditional reference, or a smaller skill; writing trigger descriptions and reference routers; naming procedural or documentary skills; creating examples; keeping skill context…
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Opinionated conventions for designing focused agent-skill plugins as encapsulated, installable capabilities. Use when defining a plugin boundary, deciding which skills are public entry points, hiding shared implementation skills, splitting broad plugins, designing plugin structure, minimizing client manifests, or…
Casper-Studios/casper-marketplace
Plugin Claude Code
Data analysis, visualization, and storytelling skill for financial and RevOps contexts.
Casper-Studios/casper-marketplace
Skill Claude CodeCodex
Data analysis, visualization, and storytelling skill for financial and RevOps contexts. Use when: analyzing revenue data, building forecasts, cohort analysis, churn modeling, pipeline analytics, creating data-driven reports, building dashboards, cleaning messy data, sanity-checking analytical claims, exporting to…
Casper-Studios/casper-marketplace
Command
Run data analysis workflow with decision logging and bias checking.