PSLoom kernel

The kernel composes harnesses, owns the scoped verb registry and draft lifecycle, and supplies shared services through Warp. Harness implementation code references the contract, not kernel internals.

Per-runspace store	Responsibility
StyleStore	Definitions, per-name resolution caches, watchers.
HookBus	Handler snapshots, wiring state, trace log.
LoomSession	Verbs, harnesses, active runs, timings, reweave ledger and sheds.
TreadleCatalog	Shortcut definitions and change notifications.
ReedSession (owned by Reed)	Completers, providers, cache, wired names and completion trace.

State is keyed by runspace in weak tables. LoomSession is initialized lazily to keep module import inexpensive. Warp's HarnessHost lets a harness register and access its services without referencing the kernel assembly. Composition failure rolls back contributed verbs and published APIs.

Read the reference for all 19 exported cmdlets and the draft vocabulary. Guides cover styles, hooks, treadles, sheds and measurement. The architecture explains the execution and error channels.