Add control flow, I/O redirection, functions, coreutils, history/completion
- I/O redirection: >, >>, <, 2>, 2>&1, &>
- Job control: background & operator
- if/elif/else/fi, for/do/done, while/until loops
- Shell functions with local/declare, positional param save/restore
- Exit code propagation via exitCodeErr sentinel
- Arithmetic expansion $((expr)) with bare variable names
- Command substitution $(cmd) with pipeline support
- Glob expansion, tilde expansion, ${VAR:-default} and other forms
- Tab completion and command history via chzyer/readline
- Inline comment stripping (# outside quotes)
- Builtins: test/[, read, printf, tr, sed, cut, tail, tee, xargs,
basename, dirname, date, sleep, uniq, sort, wc, head, grep, find,
true, false, break, continue, return, shift, set, unset, export,
declare/local, source, alias, jobs, command, which, env
- Bug fixes: tokenizer parenDepth double-count for $((,
splitPipe not paren-aware (broke pipelines in $()),
local/declare TrimLeft stripping valid var name chars,
parseBlocks missing nested keywords after do/then/else
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
8c6a2ab4c2