longbridge-fx

Foreign-exchange rates for all currencies Longbridge supports.

Response language: match the user's input language — Simplified Chinese / Traditional Chinese / English.

When to use

• "今天美元兑港币多少", "USD to HKD today" → run, look up USD/HKD row.
• "100 港币能换多少美金" → run, compute 100 / (USD/HKD) (or 100 * (HKD/USD), depending on the row's quote convention).
• "我组合里 HKD / USD / CNY 都有，统一换算成 USD" → run once, normalise each currency leg.
• "人民币兑美元 / CNH vs CNY" → check whether the row is CNY/USD or CNH/USD; surface the symbol verbatim.

For cross-rates not directly listed, derive from two USD-quoted rows (e.g. EUR/JPY = (EUR/USD) / (JPY/USD)).

Subcommand

Single CLI command, no arguments beyond format. Run longbridge exchange-rate --help if unsure of current flags.

longbridge exchange-rate --format json

There are no per-currency filters — the command returns the full table; pick the row(s) you need from the JSON.

Workflow

1. Run longbridge exchange-rate --format json.
2. Find the row matching the user's pair (mind the quote convention: BASE/QUOTE is "1 BASE = N QUOTE").
3. If user wants a specific amount, do the arithmetic inline; show both rate and computed amount.
4. If the user's pair isn't directly quoted, derive via USD: A/B = (A/USD) / (B/USD).
5. Cite source as Longbridge Securities / 数据来源:长桥证券 / 數據來源:長橋證券, plus the as-of timestamp from the response if provided.

CLI examples

# Full rate table
longbridge exchange-rate --format json

That's it — there's no symbol argument. Filter on the JSON client-side.

Output

JSON array, one row per supported pair. Typical fields:

Render the relevant row(s) only; don't dump the full table unless the user asked for it.

Error handling

MCP fallback

When the CLI is unavailable, fall back to the MCP server. Discover available tools from the MCP server's tool list at runtime — do not rely on hardcoded tool names.

Related skills

File layout

longbridge-fx/
└── SKILL.md          # prompt-only, no scripts/