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workspace.repl(name, { capabilities }) grants live objects into a session
as globals. Method calls cross a host-side recorder bridge (native Workers
RPC) and commit into the session log as effects; replaying committed cells
makes zero live calls — state survives eviction without re-firing a single
side effect.
- capability(target, meta?): wrap any object, class instance, RPC stub, or
bare function; description and per-method docs ride along as typed meta.
- Handles: callable results (tabs, responses, …) become host-registered
handles, chainable across cells. They die with the session host; new
code using a dead handle gets a stale-lease error carrying its
acquisition recipe. Revoking a root grant cuts every handle descending
from it.
- Attach-time grants: every repl() call re-attaches. Committed cells
replay under the grant shapes (including data snapshots) they were
recorded with; new cells see the current attachment.
- fetchCapability(): ambient / gateway / allowlisted fetch as an ordinary
capability; ambient fetch inside cells fails with guidance instead.
- workspaceFs(): the workspace filesystem as a capability — writes are
recorded once and never re-fired on replay.
- Structured error kinds: stale-lease, not-granted, oversized-result
(reject, never truncate); replay divergence is now args-aware.
- One JSON-safe value codec (undefined, Date, bigint, bytes, Map, Set)
shared host/isolate by injecting its source into the runner module.
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