What does HackerNews think of oksh?

Portable OpenBSD ksh, based on the Public Domain Korn Shell (pdksh).

Language: C

#43 in C
#29 in Shell
Xterm code execution via font ops | Nov 2022
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For those of us who like the openbsd ksh(all two of us) which is derived from pdksh. there is the project oksh.

https://github.com/ibara/oksh

I don't know if this is helpful or just annoying unsolicited "advice"
OpenBSD 7.0 | Oct 2021
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...and that ksh descended from pdksh, and is distributed as the oksh portable project here:

https://github.com/ibara/oksh

The MirBSD Korn Shell also descended from pdksh, and it can be found here:

http://www.mirbsd.org/mksh.htm

I don't know about the feature differences and code quality between these two; they both implement most of ksh88, and a small amount of ksh93.

I prefer mksh when I need something more than a POSIX shell.
ShellCheck: Finds bugs in your shell scripts | May 2021
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> However, the MirBSD Korn shell is one of the most lively shells for development activity, the latest release being in October of 2020.

The OpenBSD Korn shell is actively developed and there is a portable version of it available. The latest version which reflects the shell as available in OpenBSD 6.9 was released 3 days ago. https://github.com/ibara/oksh
How Bash Completion Works | Oct 2019
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As an alternative, as mentioned already in response to another comment is oksh (https://github.com/ibara/oksh), a portable version of OpenBSD's pdksh. It's in the same Bourne shell lineage as bash but is lighter and the completion is simpler: you have to customise it if you want it to work for you, but it's very easy and quick to do.
How Bash Completion Works | Oct 2019
Some of this could be down to the completions that are provided. A package such as bash-completions comes with completions for a lot of common software. One specific solution to your problem, well a suggestion is to use oksh (https://github.com/ibara/oksh) a portable version of pdksh (public domain Korn shell) that comes from OpenBSD. The reason why I recommend this shell is that it has programmable completion, although it is much simpler than what's provided by bash and that aside from the built in file name completion it won't come with anything else and you won't find (aside from people's dotfiles on Github) any packages that provide you with anything. Basically you have to customise it to your needs, but because the completion is so simple, whenever you find yourself in a situation where you'd want completion, spend a few minutes adding it to your .kshrc and move on.
Bash 5.0 released | Jan 2019
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"If anyone knows of a shell which meets my criteria of being lightweight but with command history and tab completion (paths, command names and command arguments), I'd really appreciate any suggestions. Otherwise I may have to look into extending dash or something."

I would also love to know the answer to this question. I am a big fan of shells and shell programming in general and POSIX shell in particular.

Only suggestion I currently have is ksh, of which there are a few implementations, ksh93 still developed (https://github.com/att/ast), pdksh from OpenBSD (of which there is a portable version here: https://github.com/ibara/oksh) and MirBSD ksh (https://www.mirbsd.org/mksh.htm).

Otherwise of interest is mrsh: https://github.com/emersion/mrsh which was recently mentioned by Drew DeVault in a blog post linked here: https://news.ycombinator.com/item?id=18777909.

EDIT: And by mentioning mrsh, I meant it as a better/easier base to extend to get what you are asking for.