[iamhuman-cheolheelee]

Fixes #165 (the type: [String] part; see note below)

Root cause

src/cac.ts:282 runs mri(argv, mriOptions) before the type transform. mri turns any numeric-looking value into a number (+310000 -> 310000, 01234 -> 1234), and only after that does setByType (src/utils.ts:126) call String(value). The original text is already lost, so type: [String] can't bring it back. getMriOptions (src/utils.ts:51) never filled mri's string list.

Fix

getMriOptions now adds every name of an option that takes a value and has type: [String] to mri's string list, so mri keeps the argv text as-is. The existing transform still wraps it in an array.
Invariant: when an option is declared with type: [String], each value it produces is exactly the argv string the user passed.
Names come from rawName (the same kebab form mri sees), so --phone-number and short aliases are covered too.

Edge cases covered

• leading zeros (01234), leading +, exponent (1e3), hex (0x10)
• kebab-case long name plus short alias (-p)
• repeated option (several values)
• CJK value, empty string value
• options without type, or with type: [], still get mri's numeric coercion (no behavior change)

Behavior change: an optional [value] option with type: [String] passed without a value now gives [''] instead of ['true'] (that's mri's string semantics). Boolean flags aren't affected.

Cost: one extra loop over the option names when building the mri options, O(options). Nothing new on the per-argument path.

Testing

• Added array types with String transformFunction keep raw values in tests/index.test.ts. It fails on main (['310000']) and passes with the fix.
• pnpm vitest run 18/18, pnpm lint clean, pnpm typecheck clean.

Notes

Quoting in the shell (-c "1234") never reaches the program, so an option without a type can't tell a quoted value from an unquoted one. type: [String] is how a user opts in to raw strings, and that's the case this PR fixes.

AI-assisted: I used Claude Code while investigating; I reviewed, ran and verified every change myself.

cc @peetzweg @sxzz