# v0.3.0 Release Notes

> v0.2.1 -> v0.3.0

## Summary

Rounds out the Discord attachment IO contract symmetrically with Telegram: `SendFiles` uploads 1–10 attachments in a single `ChannelMessageSendComplex` call (no split between single and album like Telegram needs), while `Save` downloads any user-supplied attachment to disk via UUID-named files with a 25 MiB cap, atomic write, and defensive `Size`-vs-actual-bytes double check. `discord.Input` now exposes `Attachments []*discordgo.MessageAttachment` as a first-class field so handlers can iterate without reaching into `Raw`.
<details>
<summary>翻譯</summary>
把 Discord 的附件 IO 契約補對稱：`SendFiles` 一次上傳 1-10 個附件，走單一 `ChannelMessageSendComplex`（Discord 原生支援多附件，不需 telegram 的 single/album 分流）；`Save` 把使用者送進來的 attachment 落地，filename 走 UUID、25 MiB cap、atomic write，並做 `Size` 欄位與實際讀取雙重核對防欺騙。`discord.Input` 新增 `Attachments []*discordgo.MessageAttachment` 一級欄位，handler 不必再翻 `Raw` 才能拿到附件清單。
</details>

## Changes

### FEAT
- Add Discord SendFiles for 1-10 attachments and Save for downloads (@pardnchiu) [97aba0d]

<details>
<summary>翻譯</summary>

- 新增 Discord `SendFiles`，單次上傳 1-10 個附件
- 新增 Discord `Save`，把使用者上傳的 attachment 下載到本地 path（25 MiB cap）
- `discord.Input` 暴露 `Attachments []*discordgo.MessageAttachment` 一級欄位

</details>

## Scope

- `discord/sendFiles.go` — FEAT（新檔；`SendFiles(ctx, channelID, replyTo, paths, caption...)` 1-10 attachment 入口）
- `discord/save.go` — FEAT（新檔；`Save(ctx, att, dir)` 25 MiB cap、UUID + ext、`go-pkg/filesystem` atomic write）
- `discord/send.go` — UPDATE（`Input` 新增 `Attachments` 欄位）
- `discord/dispatch.go` — UPDATE（從 `m.Attachments` 填入 `Input.Attachments`）
- `cmd/dc/main.go` — ADD（`file` / `files` 子命令；`bot` 子命令在 Reply handler 加 `Save` 到 `./tmp` 測試流程）
- `.gitignore` — UPDATE（忽略 `tmp/`）

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