What is taiwan-data-hub CLAUDE.md?

Project memory and instructions for Taiwan Data Hub, an open-source service that collects Taiwan public data and makes it available to AI agents through the Model Context Protocol.

Use them when planning or implementing this service, especially its Rust backend, Svelte frontend, data systems, authentication, and Docker deployment.

They preserve important project context, pinned technology versions, repository layout, and known mistakes to avoid across coding sessions.

How hydai/taiwan-data-hub configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to hydai/taiwan-data-hub. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/hydai/taiwan-data-hub/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/hydai/taiwan-data-hub

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/hydai/taiwan-data-hub/claude-md/github.svg)](https://agentmods.dev/instructions/hydai/taiwan-data-hub/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/hydai/taiwan-data-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/hydai/taiwan-data-hub/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/hydai/taiwan-data-hub/claude-md"><img src="https://agentmods.dev/badge/instructions/hydai/taiwan-data-hub/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 4,296 This file is loaded in full into every session.

When invoked 4,296 The same file — it is already loaded in full.

Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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 5.1	$0.04296	$0.04296
Opus 5.5	$0.01718	$0.01718
Sonnet 5.5	$0.00859	$0.00859
Haiku 4.5	$0.00430	$0.00430

Measured 2mo ago against content hash 04985dd1047f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

taiwan-data-hub CLAUDE.md scanned grade B with 1 finding 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 2mo 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

A PreToolUse hook in `~/.claude/settings.json` auto-runs these before `git commit`.

CLAUDE.md · 392 lines

How it starts

The opening of the file, as written. The whole thing — 392 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — Project memory for Taiwan Data Hub

Per-project guidance for Claude Code (and any agentic coding assistant) working in this repository. Loaded into every Claude session — keep short and high-signal.

Project context

Taiwan Data Hub is a fully open-source, self-hostable MCP (Model Context Protocol) service hub that aggregates Taiwan public data sources and exposes them to AI agents like Claude Desktop, Cursor, and Cline.

Status: pre-alpha · design phase (no implementation code yet)
License: Apache-2.0
Canonical design: docs/DESIGN.md — read this first
Roadmap: Project #2 · 80 sub-issues across 9 milestones
MVP (v0.1) = M0 + M1 + M2 → 28 P0 issues

Tech stack (versions pinned as of 2026-05-18)

Layer	Stack
Backend	Rust · axum 0.8.8 · sqlx 0.8.6 · polars 0.53 · rmcp 1.7
Frontend	SvelteKit 2.59 · Svelte 5.55 (Runes) · Tailwind 4.3 (CSS-first) · shadcn-svelte 1.2
Data	PostgreSQL 18 (UUIDv7) · Parquet · SeaweedFS (S3-compat) · DragonflyDB · Meilisearch 1.15
Spec	MCP 2025-11-25 · OAuth 2.1 + PKCE · OpenAPI 3.1 (utoipa 5.5)
Deploy	Docker Compose (profiles: default / full / obs / dev) · Caddy 2.11

Full version table and rationale: docs/DESIGN.md §5.

Critical gotchas (do NOT copy from old examples)

These libraries had breaking changes within the last 12 months. Always check versions before copy-pasting from blog posts or AI training data:

axum 0.8 — path syntax /:id panics at startup; use /{id}.
Tailwind v4 — no tailwind.config.js; use @theme block in CSS, @import "tailwindcss", plugin @tailwindcss/postcss. shadow renamed: shadow-sm → shadow-xs.
Svelte 5 Runes — use $state / $derived / $effect / $props; never $: or export let.
rmcp 1.x — not 0.x; trait signatures and imports changed completely.
utoipa 5.x — use OpenApiRouter, OpenAPI 3.1 schema paths.
oauth2 / openidconnect 5.x — async client now trait-based.
thiserror 2.0 — most cases rebuild fine; check changelog for #[backtrace].
Paraglide-JS v2 — API renamed: getLocale() / setLocale() / locales (NOT languageTag() / availableLanguageTags); server middleware moved to server.js as paraglideMiddleware.
MapLibre GL v5 — style spec & worker config changed.
echarts v6 — v5 → v6 not fully compatible; do NOT use svelte-echarts (stale 1.0.0); write a 30-line wrapper.
MinIO is archived (2026-04-25) — use SeaweedFS or Garage instead.
PostgreSQL 18 — has native uuidv7(); prefer over manual UUID generation for sortable ids.

Read the full file on GitHub · 392 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.

2mo ago First seen · 392 lines · 4,296 tokens per session scan B 04985dd1047f

Subscribe to this mod's changes

taiwan-data-hub CLAUDE.md is an instructions file published in the GitHub repository hydai/taiwan-data-hub (1 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 4,296 tokens to every session, about $0.0172 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

ai-agent axum claude mcp model-context-protocol open-data

taiwan-data-hub CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
taiwan-data-hub CLAUDE.mdhydai/taiwan-data-hub	Instructions file	1	5mo ago	Apache-2.0	B	4,296	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

taiwan-data-hub: Instructions file for Claude Code