Building a key/value store using C++

I'm building a key/value store in C++ that uses SQLite for storage and has a simple command-line interface for storing and retrieving values. I want to use this to store often-used commands/snippets/passwords or anything else I need quickly and often when I'm using a terminal.

Requirements

Not sure what I'm calling this yet but lets assume its called kv for now.

• kv -p <key> <value> adds or replaces key and stores against it
• kv <key> retrieves the value stored for or returns nothing is no key found
• kv -d <key> deletes the given key
• kv -list all keys that currently exist in alphabetical order
• kv -list <search-term> lists all keys that start with the search term in alphabetical order
• kv -help shows a help page
• Must allow piping of values e.g. `history | grep < kv '
• SQLite DB file should be stored in standard location for host OS
• Keys with spaces are NOT supported
• Values with spaces ARE supported by enclosing in double quotes
• Keys are NOT case sensitive
• Keys can include punctuation

Non-functional requirements

I'm using this project as a way to get back into C++ after a long time in Java-land. So want to use the latest, common and standard tools:

• Use newish version of C++
• Use standard code-formatting tools
• Use GooleTest
• Use Valgrind