Add OpenStock agent CLI skill

skills/openstock-agent-cli/references/commands/market/guide.md

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+# `openstock market`
+
+## Purpose
+
+Read KIS market data for a stock symbol.
+
+## Subcommands
+
+| Command | Purpose |
+| --- | --- |
+| `openstock market <symbol>` | Current price and company/basic information. |
+| `openstock market history <symbol> --from YYYYMMDD --to YYYYMMDD [--period D|W|M|Y] [--raw-price]` | OHLCV price history. |
+
+## `market <symbol>`
+
+### Output Fields
+
+| Field | Meaning |
+| --- | --- |
+| `broker` | Broker API used for data. |
+| `symbol` | Queried KRX symbol. |
+| `price` | Current price and market values. |
+| `company` | Stock/company basic information. |
+
+## `market history`
+
+### Input
+
+| Input | Meaning |
+| --- | --- |
+| `symbol` | KRX symbol. |
+| `--from` | Start date in `YYYYMMDD`. |
+| `--to` | End date in `YYYYMMDD`. |
+| `--period` | `D`, `W`, `M`, or `Y`; default `D`. |
+| `--raw-price` | Use original prices instead of adjusted prices. |
+
+### Output Fields
+
+| Field | Meaning |
+| --- | --- |
+| `broker` | Broker API used for data. |
+| `symbol` | Queried KRX symbol. |
+| `period` | Candle period. |
+| `date_range` | Requested date range. |
+| `adjusted` | Whether adjusted price was requested. |
+| `count` | Number of candles. |
+| `candles` | Date-ascending OHLCV values. Numeric values may be strings. |
+| `summary` | KIS summary data. |
+
+## IO
+
+| Direction | Data |
+| --- | --- |
+| Env read | KIS app credentials and access token. |
+| External IO | KIS domestic stock quote/history endpoints. |
+| Side effect | none |
+
+## Agent Notes
+
+Use `market` for current context and `market history` for price movement evidence. Always resolve ambiguous names with `search` first.

skills/openstock-agent-cli/references/commands/market/history/guide.md

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+# `openstock market history`
+
+Purpose: query OHLCV price history for a stock.
+
+Usage:
+
+```bash
+openstock market history 005930 --from 20260101 --to 20260609
+openstock market history 005930 --from 20260101 --to 20260609 --period W
+```
+
+Inputs: `symbol`, `--from`, `--to`, optional `--period`, `--raw-price`.
+
+Reads: KIS credentials and access token.
+
+External IO: KIS price history endpoint.
+
+Output fields: `broker`, `symbol`, `period`, `date_range`, `adjusted`, `count`, `candles`, `summary`.
+
+Agent rule: use for price movement evidence; keep numeric strings intact unless calculating.