[kyon-eth]

What

Declare 72 additional libSceIcu callable exports. Each candidate name hashes to a typed function NID in the public 3.20 catalogue, and per-image records show the same module and library identities in two version-labelled images. Neither image label authenticates retail firmware provenance. These are import-resolution declarations that throw; signatures and behavior are unverified, and no game unblock is claimed. Data exports and implementations are outside this change.

The overlap checker could not automatically compare shared files in #12320 and #12738 because those branches conflict with main. Their added ICU definitions were checked separately; none matches the proposed NIDs.

Tested

• macOS x86-64: compiled original and updated export sources and verified the object symbol delta against the 72 names.
• Audited public headers, conventions, whitespace and open PR overlap.
• No Linux, Windows, console or game run was performed.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed under Silent stubs in their library's technical debt file
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• Fixes: none
• Unblocks: none
• GPUs tested: n/a
• AI-assisted: yes

[github-actions]

Progress report (08a10d2 → a7e6e93)

📉 System libraries: 43.05% (-0.19%, +72 declared functions)

🆕 72 declared as stubs

Library	Name
libSceIcu	u_tolower
libSceIcu	u_totitle
libSceIcu	u_toupper
libSceIcu	ublock_getCode
libSceIcu	ubrk_close
libSceIcu	ubrk_countAvailable
libSceIcu	ubrk_current
libSceIcu	ubrk_first
libSceIcu	ubrk_following
libSceIcu	ubrk_getAvailable
libSceIcu	ubrk_getRuleStatus
libSceIcu	ubrk_isBoundary
libSceIcu	ubrk_last
libSceIcu	ubrk_next
libSceIcu	ubrk_open
libSceIcu	ubrk_preceding
libSceIcu	ubrk_previous
libSceIcu	ubrk_setText
libSceIcu	ubrk_setUText
libSceIcu	ucnv_cbFromUWriteBytes
libSceIcu	ucnv_close
libSceIcu	ucnv_convertEx
libSceIcu	ucnv_fromUnicode
libSceIcu	ucnv_getCanonicalName
libSceIcu	ucnv_getName
libSceIcu	ucnv_open
libSceIcu	ucnv_reset
libSceIcu	ucnv_setFallback
libSceIcu	ucnv_setFromUCallBack
libSceIcu	ucnv_setSubstChars
libSceIcu	ucnv_setToUCallBack
libSceIcu	ucnv_toUChars
libSceIcu	ucnv_toUnicode
libSceIcu	ucurr_getName
libSceIcu	ucurr_openISOCurrencies
libSceIcu	udata_setCommonData
libSceIcu	udata_setFileAccess
libSceIcu	uloc_addLikelySubtags
libSceIcu	uloc_canonicalize
libSceIcu	uloc_countAvailable
libSceIcu	uloc_forLanguageTag
libSceIcu	uloc_getAvailable
libSceIcu	uloc_getBaseName
libSceIcu	uloc_getCharacterOrientation
libSceIcu	uloc_getCountry
libSceIcu	uloc_getDefault
libSceIcu	uloc_getKeywordValue
libSceIcu	uloc_getLanguage
libSceIcu	uloc_getScript
libSceIcu	uloc_minimizeSubtags
libSceIcu	uloc_setKeywordValue
libSceIcu	uloc_toLanguageTag
libSceIcu	uloc_toUnicodeLocaleType
libSceIcu	unorm2_composePair
libSceIcu	unorm2_getNFCInstance
libSceIcu	unorm2_getNFDInstance
libSceIcu	unorm2_getNFKCInstance
libSceIcu	unorm2_getNFKDInstance
libSceIcu	unorm2_getRawDecomposition
libSceIcu	unorm2_isNormalized
libSceIcu	unorm2_normalize
libSceIcu	ures_close
libSceIcu	ures_getByKey
libSceIcu	ures_getStringByKey
libSceIcu	ures_open
libSceIcu	uscript_getScript
libSceIcu	uscript_getShortName
libSceIcu	uscript_hasScript
libSceIcu	utext_close
libSceIcu	utext_openConstUnicodeString
libSceIcu	utext_openUChars
libSceIcu	utext_setup

Changed libraries (implemented exports)

Library	Before	After	Change
libSceIcu	21/120 (17.50%)	21/192 (10.94%)	-6.56%

[github-actions]

Some comparisons could not be completed because a pull request conflicts with the base branch. Review these shared files manually before concluding that there is no overlap.

Pull request	Shared files not compared
PR 10964	core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 10965	core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 10966	core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 10967	core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 12320	core/libs/prx/libSceIcu/Export.cpp core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 12738	core/libs/prx/libSceIcu/libSceIcu.hpp docs/dev/debt/libSceIcu.md
PR 14212	docs/dev/debt/libSceIcu.md

[CnRJay]

Correction (2026-11-01): this review demanded a title for a PR where no title can supply one. CONTRIBUTING allows Unblocks: none. The technical points below are unaffected.

No title ID and no log line here. The description says "no game unblock is claimed" and Unblocks: none, so nothing shows a title on main reaching any of these 72 libSceIcu NIDs. Declaring names that throw through NotImplemented_nid_no_patch does not change what a title does today, since an unresolved import already stops it.

A related question: all 72 are int APS5_VABI name() with no parameters, including functions such as u_tolower, u_totitle and ubrk_first whose real signatures are known from ICU. If the declarations are meant to be the starting point for implementation, giving them real prototypes is cheap here and avoids redeclaring them later.

Please add the title ID that imports one of these and the log line from main showing it reaching the import. Without that this is inventory bookkeeping, not progress on a title.