Workspace API key as a bearer token: Authorization: Bearer ish_sk_live_.... Keys are workspace-scoped machine principals minted in Settings > Developers (shown once at mint). Scopes: sessions:run (create a session, submit turns, close), sessions:read (read the session and its decision trace), environments:read and environments:write (manage the workspace's registered environments), tasks:read and tasks:write (manage the workspace's registered tasks), people:read and people:write (the people the workspace can run a session for), and usage:read (the workspace's own consumption, spend limits and rate-limit budgets). A key is minted with sessions:run, sessions:read, and tasks:read by default; every other scope must be requested, people:read and usage:read included. An ish user access token also works on the same header for personal scripts.
null is a real value on the nullable fields (background, steps) where it CLEARS them, so omitting a field and sending it as null mean different things. name and instructions cannot be cleared; a null there leaves the stored value alone.
Any applied write bumps revision. Sessions already opened against the old content keep their frozen copy.
Set when the task is archived (DELETE). An archived task stays readable by id so existing sessions keep resolving, is hidden from the default list, refuses new sessions (409), and frees its name for reuse.
Background the person is treated as already knowing, or null. Accepted and stored; not yet consumed by API sessions, which currently render the instructions only.
The actions a run is checked against afterwards, or null when the task has none. Steps are never shown to the person doing the run. Accepted and stored; not yet consumed by API sessions.
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