Bug: Generated Rime config replaces Luna Pinyin speller/algebra, disabling upstream spelling corrections such as yv

[hikikomomidori-ux]

Reproduction steps

1. Enable Chinese QWERTY input in FUTO Keyboard and select Full Pinyin.
2. Type yu: Chinese candidates appear normally.
3. Type yv: no Chinese conversion candidates appear.
4. The same behavior can be checked with jv, qv, and xv versus ju, qu, and xu.

Actual result

yv is not accepted as an alternative spelling for yu.

This differs from current upstream Rime Luna Pinyin behavior. FUTO's generated customization file appears to replace Luna Pinyin's existing speller/algebra with only the fuzzy-Pinyin rules selected in FUTO.

Expected result

FUTO should preserve Luna Pinyin's upstream speller/algebra rules while adding FUTO's configurable fuzzy-Pinyin rules.

Upstream luna_pinyin.schema.yaml loads:

• pinyin:/abbreviation
• pinyin:/spelling_correction
• pinyin:/key_correction

and upstream pinyin:/spelling_correction contains:
derive/^([jqxy])u/$1v/correction

So yv should be accepted as a correction spelling for yu.

In current FUTO source, ChineseIME.writeCustomizationFile() emits a replacement speller/algebra: node. Please consider merging/appending FUTO fuzzy rules instead of replacing the upstream algebra, and add regression tests for yu/yv, ju/jv, qu/qv, and xu/xv.

Keyboard Version

0.1.30

Which android version are you using?

Not provided; this appears reproducible at the Rime configuration layer rather than being Android-version specific.

Which device are you using?

iQOO 13

Which operating system are you using?

vivo/iQOO stock OS; exact version not provided.

References

Related issues:

• Feature request: Smart pinyin input #2154
• Feature request: Suggestion: Support Abbreviated Pinyin for Chinese #2156

Relevant source:

• https://github.com/futo-org/android-keyboard/blob/master/java/src/org/futo/inputmethod/engine/general/ChineseIME.kt
• https://github.com/rime/rime-luna-pinyin/blob/master/luna_pinyin.schema.yaml
• https://github.com/rime/rime-luna-pinyin/blob/master/pinyin.yaml

The suspected cause is that FUTO writes speller/algebra: directly in the generated custom YAML, which can replace Luna Pinyin's upstream algebra instead of extending it.