diff --git a/docs/dev/debt/libc.md b/docs/dev/debt/libc.md
index bb3d4b6fa8..f827eccd6d 100644
--- a/docs/dev/debt/libc.md
+++ b/docs/dev/debt/libc.md
@@ -42,7 +42,7 @@
 - [memcpy_s, memmove_s, strcpy_s, strncpy_s, strcat_s, strncat_s, wmemcpy_s, wmemmove_s, wcsncpy_s, wcscat_s, wcsncat_s](../../../core/libs/prx/libc/src/Strings.cpp) (libc) use the C11 Annex K destination size constraints, with RSIZE_MAX taken as (SIZE_MAX >> 1) / sizeof(char16_t) for wide operations and SIZE_MAX >> 1 for byte operations. An oversized destination size returns ERANGE (34) without touching the destination; the console's RSIZE_MAX and exact error value are unverified. Constraint violations return an error without invoking the registered constraint handler, as before.
 - [wcsncat_s and wcscat_s](../../../core/libs/prx/libc/src/Strings.cpp) (libc) refuse a copy as overlapping only when the written range `[dest + len1, dest + len1 + len2)` meets the read range `[src, src + len2)`. The rule comes from a static reading of the console's `wcsncat_s` in `libc.prx` (not run on a console); `wcscat_s` gets it through `wcsncat_s`, and its own console code was not read. The narrow `strncat_s` keeps a wider rule, `[dest, dest + used + length + 1)` against `[src, src + length + 1)`, whose console code was not read either, so it refuses some copies whose wide equivalent proceeds.
 - [snwprintf_s](../../../core/libs/prx/libc/src/FormattingWide.cpp) (libc) - follows C11 K.3.9.1.3 with `RSIZE_MAX` assumed to be `SIZE_MAX >> 1`. A runtime-constraint violation only returns a negative value: the handler installed with `set_constraint_handler_s` is not invoked, and the console's default handler is unknown. An invalid multibyte `%s` argument is copied byte by byte instead of being reported as an encoding error, as in `vswprintf`
-- [swprintf_s and vswprintf_s](../../../core/libs/prx/libc/src/FormattingWide.cpp) (libc) - follow C11 K.3.9.1.4 with `RSIZE_MAX` assumed to be `SIZE_MAX >> 1`: the complete output, including the terminating null, must fit in the buffer, otherwise it is a runtime-constraint violation that sets `buffer[0]` to zero and returns a negative value, and the buffer is not partially written. Argument and encoding checks match `snwprintf_s`
+- [swprintf_s and vswprintf_s](../../../core/libs/prx/libc/src/FormattingWide.cpp) (libc) - follow C11 K.3.9.1.4 with `RSIZE_MAX` assumed to be `(SIZE_MAX >> 1) / sizeof(char16_t)`: the complete output, including the terminating null, must fit in the buffer, otherwise it is a runtime-constraint violation that sets `buffer[0]` to zero and returns a negative value, and the buffer is not partially written. Argument and encoding checks match `snwprintf_s`
 - [strerror](../../../core/libs/prx/libc/src/Errors.cpp) (libc) - follows the `libc.prx` that CUSA04865 and CUSA12435 ship, loaded on a PS4 Pro (firmware 10.71): 0 gives "No error", 1 to 94 the FreeBSD texts, any other number "error_code=0x%08x", and errno is left alone. The console's system libc, which homebrew without a bundled `libc.prx` uses, answers differently ("No error information" for 0 and unknown numbers, 95 and 96 named). `strerror_r` and `perror` keep "No error: 0" and "Unknown error: %d"; they are not measured.
 - [strerror_s and strerrorlen_s](../../../core/libs/prx/libc/src/WideConversion.cpp) (libc) follow [C11 K.3.7.4.2 and K.3.7.4.3](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf), using the existing FreeBSD error messages and unknown-error formatting. Truncation writes an ellipsis when capacity exceeds 3; constraint failures leave the destination untouched and invoke the registered guest-ABI handler. The console's `RSIZE_MAX` (`SIZE_MAX >> 1` here), nonzero returns (`EINVAL` 22 for constraints, `ERANGE` 34 for truncation), handler arguments and default abort behavior are unverified. Messages remain in the C locale, and guest errno is preserved.
 - [getw and putw](../../../core/libs/prx/libc/src/BinaryWordIo.cpp) (libc) follow FreeBSD 11.4 [getw.c](https://github.com/freebsd/freebsd-src/blob/8c639945a44588f6cfdddfb057bb5aad88735da0/lib/libc/stdio/getw.c) and [putw.c](https://github.com/freebsd/freebsd-src/blob/8c639945a44588f6cfdddfb057bb5aad88735da0/lib/libc/stdio/putw.c): one 32-bit little-endian word, `getw` returns -1 for EOF or an error, and `putw` returns 0 on success or -1 on error while holding the stream lock. They use the existing host-backed streams, so buffering and error timing follow the host CRT. Null streams throw and closed streams return -1 with `EBADF`, as existing byte I/O does. Console behavior is unverified.