packmind packmind-frontend-data-flow.instructions.md

A frontend data-flow pattern for React Router and TanStack Query, a library that loads and caches data from an application’s backend.

In plain words
What is it for?
Use it when building route modules that load data, define reusable query options and hooks, prevent requests with missing parameters, or provide navigation breadcrumbs.
Why use it?
It separates data loading from page display and keeps route loaders, query hooks, conditional requests, and breadcrumbs consistent.

Instructions file for GitHub Copilot

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 instructions/packmindhub/packmind/packmind-frontend-data-flow
Clone the repo
git clone --depth 1 https://github.com/PackmindHub/packmind

Made for: GitHub Copilot.

Per session 416 This file is loaded in full into every session.
When invoked 416 The same file — it is already loaded in full.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00416 $0.00416
Opus 5 $0.00208 $0.00208
Sonnet 5 $0.00083 $0.00083
Haiku 4.5 $0.00042 $0.00042

Measured 2d ago against content hash 36c0fa3e41ed, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

packmind packmind-frontend-data-flow.instructions.md 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.

apps/frontend/.github/instructions/packmind-frontend-data-flow.instructions.md · 20 lines

What it actually says

Standard: Frontend Data Flow

This standard defines the recommended data flow pattern for frontend routes in the Packmind codebase using React Router v7 in framework mode with TanStack Query for data management. It ensures consist... :

  • Access data via query or mutation hooks in frontend route modules rather than calling gateways directly to maintain separation between data access and presentation layers
  • Consume data in route module components using the useLoaderData() hook to access data returned by the clientLoader
  • Define a crumb property in the handle export of route modules to enable automatic navigation breadcrumb generation
  • Enable query options conditionally using the enabled property to prevent execution when required parameters are missing or invalid
  • Export query hooks (e.g., useGetStandardByIdQuery) alongside query options to provide consistent component-level data access patterns
  • Export query options as standalone functions (e.g., getStandardByIdOptions) separate from hooks to enable reuse in both hooks and route loaders
  • Name route module default export functions with a suffix of RouteModule (e.g., StandardDetailRouteModule) to clearly identify route-level components
  • Prefer queryClient.ensureQueryData() over queryClient.fetchQuery() in clientLoaders to return cached data when available instead of always fetching
  • Store domain queries in the domain folder organized by entity at apps/frontend/src/domain/{entity}/api/queries/ to maintain clear separation of concerns and domain boundaries
  • Use clientLoader function (not loader) in route modules for data fetching when using React Router in SPA mode to ensure proper client-side data loading
  • Use Gateway type helper for authenticated operations or PublicGateway for public operations in frontend gateway interfaces to ensure proper command/response typing
  • Use queryClient.ensureQueryData() or queryClient.fetchQuery() in clientLoader to preload data before rendering and leverage TanStack Query's caching mechanisms

Full standard is available here for further request: Frontend Data Flow

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. 2d ago First seen · 20 lines · 416 tokens per session scan A 36c0fa3e41ed

Subscribe to this mod's changes

packmind packmind-frontend-data-flow.instructions.md is an instructions file published in the GitHub repository PackmindHub/packmind (306 stars, last pushed 4d ago), licensed Apache-2.0. It adds 416 tokens to every session, about $0.0021 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.