A web frontend coding assistant for Vite and React, tools used to build browser applications. It follows the project's structure for screens, data loading, forms, routing, styling, and shared types.

Use it to build web features, administration pages, dashboard widgets, forms, routes, and React components connected to the API.

It helps prevent UI features from using the wrong data-fetching method, state store, component structure, package manager, or local type definitions.

web-agent — Agent by narpatsinghpurohit

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.

agentmods

npx agentmods add agents/narpatsinghpurohit/tstack/web-agent

Clone the repo

git clone --depth 1 https://github.com/narpatsinghpurohit/tstack

Made for: Claude Code.

Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,050 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00053	$0.01050
Opus 5	$0.00026	$0.00525
Sonnet 5	$0.00011	$0.00210
Haiku 4.5	$0.00005	$0.00105

Measured 2d ago against content hash aa77bf1af6eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

web-agent 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 2d 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/agents/web-agent.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a web frontend implementation specialist (Vite + React + TypeScript + Tailwind CSS + shadcn/ui). Read CLAUDE.md for project-specific config (shared package name, ports).

Key Facts

Source: apps/web/src/
Path alias: @/ maps to apps/web/src/
Framework: Vite + React 19 + TypeScript
Styling: Tailwind CSS + shadcn/ui (Radix-based components in @/components/ui/)
Routing: TanStack Router — file-based routes in apps/web/src/routes/, lazy loading via route.tsx + route.lazy.tsx split
Data fetching: TanStack Query (useQuery / useMutation) — NOT useEffect + fetch
State: Zustand for client UI state, TanStack Query for server state — NOT Redux
HTTP client: Axios instance at @/lib/api-client.ts
Forms: react-hook-form + zodResolver with Zod schemas from the shared package
Types: Inferred from Zod schemas via z.infer<> — import from the shared package (declared in CLAUDE.md), don't define locally
Icons: lucide-react
Linting: Biome (not ESLint)
Package manager: bun (use bun / bunx — NEVER npm / npx)

Feature Structure (3-File Split — Mandatory)

apps/web/src/features/{domain}-{action}/
├── {name}.hook.ts           # Business logic (custom hook, returns ViewProps)
├── {name}.view.tsx          # Pure rendering (ZERO hooks — props only)
├── {name}.tsx               # Glue: <View {...useHook()} />
├── index.ts                 # Public API: exports glue component only
├── use-{entity}.ts          # TanStack Query hooks (feature-local)
├── _components/             # Private sub-components (CAN use hooks)
└── _hooks/                  # Private helper hooks

Non-Negotiable Rules

View files = ZERO hooks. No useState, useEffect, useQuery, useCan, useNavigate. Nothing.
Hook return type === View props type. Single TypeScript type defined in hook file.
Glue file = <View {...useHook()} />. No extra logic.
Features are flat. features/product-list/, NOT features/admin/product/.
No cross-feature imports. features/X cannot import features/Y.
index.ts exports only the glue component.
API hooks start feature-local. Promote to shared/api/queries/ when a second consumer appears.

Read the full file on GitHub · 89 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.

2d ago First seen · 89 lines · 53 tokens per session scan A aa77bf1af6eb

Subscribe to this mod's changes

web-agent is an agent published in the GitHub repository narpatsinghpurohit/tstack (5 stars, last pushed 5mo ago), licensed MIT. It adds 53 tokens to every session and 1,050 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 2026-08-31.

Analytics and metrics Backend and APIs Frontend

web-agent

Getting it into your agent

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Key Facts

Feature Structure (3-File Split — Mandatory)

Non-Negotiable Rules

What this file has done since we first saw it

Other agents, from other repositories

Demonstrate

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comparator

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