package tool

// RootRunKVPartition is the sentinel skill_id partition under which all
// `root_run:<id>` KV rows are stored.
//
// Why a sentinel: skill KV rows are keyed (skill_id, scope, key), so
// two sibling workers with different IDs (e.g. agent_spawn ephemeral
// workers under one fan-out) could never share state through a scope
// string alone — each would read/write its own partition. Routing every
// root_run scope into one shared partition makes the scope string the
// real boundary: it embeds the root run id, which the validator checks
// against Invocation.RootRunID, so per-tree isolation holds even though
// the partition is global.
//
// Declared in the root skilltools package (not tools/) because both the
// tool handlers (pkg/skilltools/tools) and the storage sweeper
// (pkg/logic/skills) need it without importing each other.
const RootRunKVPartition = "__root_run__"