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60 lines
2.8 KiB
Markdown
60 lines
2.8 KiB
Markdown
# WordFSRS — Spaced-repetition vocabulary in your IM
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A LangBot plugin built on the [FSRS spaced-repetition algorithm](https://github.com/open-spaced-repetition/py-fsrs) (the **same memory model behind Maimemo / 墨墨背单词**). Build your own vocabulary deck in any chat with the `!word` command and review on a scientifically scheduled forgetting curve.
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[简体中文](readme/README_zh_Hans.md)
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## Features
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- **FSRS scheduling**: every card uses `py-fsrs` to compute its next review time — no more rigid fixed intervals.
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- **Per-session isolation**: private chats and each group keep their own deck (keyed by `{launcher_type}:{launcher_id}`).
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- **Daily new-card limit**: configurable, so you don't get flooded with new words at once.
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- **Target retention**: configurable FSRS `desired_retention` (0.7–0.97).
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- **Bilingual**: all messages available in English / Chinese via the `language` config.
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## Commands
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| Command | Description |
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|---|---|
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| `!word add <word> [meaning]` | Add a word |
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| `!word review` | Pull the next due / new word to review (aliases `next`, `r`) |
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| `!word show <word>` | Show a word's meaning (the answer; alias `answer`) |
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| `!word grade <word> <1-4>` | Grade recall: 1 forgot / 2 hard / 3 good / 4 easy (aliases `g`, `rate`) |
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| `!word stats` | Stats: total / due / new / today's new |
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| `!word list [page]` | List the deck (sorted by next review; alias `ls`) |
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| `!word del <word>` | Delete a word (aliases `rm`, `delete`) |
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| `!word help` | Help |
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Grades also accept English / Chinese aliases: `again/hard/good/easy`, `忘了/难/会/简单`.
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## Typical flow
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```
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!word add apple apple
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!word add ephemeral short-lived
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!word review → pulls one word and asks you
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!word grade apple 3 → grade "good", FSRS schedules the next review
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!word stats → check progress
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```
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## Configuration
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- `language` (default `zh_Hans`): language for all bot messages — `en_US` or `zh_Hans`.
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- `daily_new_limit` (default 20): max new cards introduced per session per day; 0 = unlimited.
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- `desired_retention` (default 0.9): FSRS target recall probability; higher = more frequent reviews.
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## Data storage
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Review progress is stored as JSON in the plugin KV store under
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`deck:{instance_uuid}:{workspace_uuid}:{installation_uuid}:{session_id}` (binding-less
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dedicated workers keep the historical `deck:{session_id}` row; existing rows are not
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migrated). Each card keeps the full FSRS state (`Card.to_dict()`), so upgrading algorithm
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parameters reads back losslessly.
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## Shared runtime
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This release declares `shared-runtime-v1` / `stateless-v1`: settings are read per
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invocation and the deck read-modify-write is guarded per installation binding.
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See [SHARED_RUNTIME.md](SHARED_RUNTIME.md) for the per-invocation and
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revocation-scoped state and the known limits. It is not a certification claim.
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