Writing your own

There is no SDK and no interface to implement.

{
  "name": "kafka",
  "kind": "runner",
  "description": "My own Kafka setup — brokers on localhost:9092",
  "exec": "./kbench",
  "verbs": { "list": "list", "run": "run" }
}

chmod +x kbench
oss ext add /path/to/your/repo
oss run --name kafka list

The fields

Field	Meaning
`kind`	`runner` (executes) or `memory` (remembers)
`exec`	Anything executable. Run in your repo’s directory, not the caller’s
`verbs`	Maps the portable name on the left to whatever your tool calls it on the right
`writes`	Verbs that post somewhere public — see below
`writesTo`	Where those land, as bare `owner/name`

verbs is a mapping so you never have to rename your own commands to join in.

If a verb writes outward

"writes": ["publish"],
"writesTo": "acme/orders"

Anything listed is refused unless the person names that exact repository with --approve-upstream and confirms at the terminal.