feat: foreign flow (idx stocks flow, get_foreign_flow)

`idx stocks flow SYMBOL` shows what foreign investors bought and sold of a
stock, session by session, from IDX's own daily trading summary: foreign
buy, sell and net volume, net value at the session's average price, and
the share of value traded outside the regular board, with range totals.
Latest 10 sessions by default (--days, at most 60) or --from/--to. The MCP
server exposes it as get_foreign_flow.

- api/idx: pure parser for GetStockSummary (rows dated another session
  are dropped) and a provider over curl-impersonate's profile fallback
  with a 30 s limit; Cloudflare passes only some fingerprints.
- flow: each session is cached whole by date, so other stocks' flows for
  the same sessions need no request. Weekends are never requested.
- Idx::idx_code is shared by broker and flow for the .JK-only check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V3syn2fN2LNo5pvTSqc6eh
This commit is contained in:
hermes 2026-10-18 05:09:21 +00:00
commit 29f143fa1b
40 changed files with 1278 additions and 29 deletions

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@ -63,6 +63,17 @@ Company data for one IDX ticker: profile, financial statements, earnings, analys
| `sections` | array of `profile` / `financials` / `earnings` / `sentiment` / `insights` / `news` | no | Sections to fetch (default: all). |
| `symbol` | string | yes | IDX ticker, e.g. "BBCA". |
## `get_foreign_flow`
Foreign investors' buying and selling of one IDX ticker, session by session (oldest first), from IDX's daily trading summary: foreign buy, sell and net volume in shares, `foreign_net_value` (net shares at the session's average price, an estimate, IDR), `change_bps`, and `non_regular_bps` (share of value traded outside the regular board). Totals cover the whole range; `foreign_share_bps` is foreign investors' share of trading. End of day.
| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `days` | integer | no | Latest sessions (default 10, at most 60). Omit when giving from/to. |
| `from` | string | no | First session of a range, YYYY-MM-DD (at most 92 days). |
| `symbol` | string | yes | IDX ticker, e.g. "BBCA". |
| `to` | string | no | Last session of the range, YYYY-MM-DD (default today). |
## `get_investor_holdings`
Every IDX holding (above 1%) of one investor, matched by name.