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2026-10-22feat(input)!: validate INPUT and read whole lines into STRING_ov4
Scalar INPUT now reads one whitespace-delimited token through module-local IR helpers instead of scanf, then skips spaces and tabs and consumes one newline. INTEGER, REAL, BOOLEAN (TRUE or FALSE in any case) and CHAR are validated, and bad input or end of input is a runtime error. STRING INPUT reads the rest of the line. The unused scanf and REAL printf format globals are removed. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22feat(output)!: print REAL values in shortest round-trip form_ov4
OUTPUT and NUM_TO_STR now share Python repr formatting instead of %f. BREAKING CHANGE: REAL output changes from six fixed decimals (2.500000) to the shortest round-trip text (2.5). Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-22fix(stdlib): make IS_NUM agree with STR_TO_NUM and explain conversion errors_ov4
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-20refactor(strings): replace compiler builtins with the STRING library_ov4
Construct literals as STRING values and route string operations through ordinary library functions and operators. Preserve value ownership in records, arrays, constants and file I/O. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>