CLI Config Set

`ed config set`

Validates a value against the setting's type and allowed list, writes it, and tells the running app.

ed config set <key> <value> [--json]

Argument	Type / values	Default	What it does
`key`	a catalogue key	required	The setting to write
`value`	text, parsed by the setting's type	required	The new value

Option	Type / values	Default	What it does
`--json`	flag	`false`	Emit JSON on stdout

How the text is parsed depends on the type:

Type	Accepted text	Refused
`bool`	`true`, `false`, `yes`, `no`, `on`, `off`, `1`, `0`, `enabled`, `disabled`, in any case	anything else, `is not a boolean, use true or false`
`int`	a whole number, surrounding spaces trimmed	`abc is not a whole number`
`number`	a decimal number, surrounding spaces trimmed	`abc is not a number`
`string`	the text verbatim, and when the setting has an allowed list, one of those values exactly	a value outside the list, with the list as the hint
`csv`	the text verbatim, stored as one string	the same allowed-list check, though no `csv` setting declares one
`stringList`	comma separated, each item trimmed, empty text gives an empty list	nothing
`map`	nothing	always, `map settings cannot be set from the command line`

The human output is the key and the value the store now holds. --json adds what was there before, which is the fallback when the setting had never been written:

{
  "key": "creditHidden",
  "previous": false,
  "value": true
}

ed config set preventSleep true
ed config set warnPercent 70
ed config set limitsProvider codex
ed config set cleanerSelectedDrives /,/Volumes/Data

Validation happens before the write, so a rejected value leaves the stored value alone and exits 1. The 23 read-only keys are refused the same way, also exit 1, before anything is touched:

$ ed config set appearance bogus
error: bogus is not a valid value
hint: allowed: system, light, dark

$ ed config set micMuted true
error: micMuted is read only

A successful write posts settingsChanged whether or not Edith is running, so ed config set presenterMode true blurs the numbers in the open window the same way the menu bar toggle does.