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docs(core): record Modal sandbox tracer

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Kit Langton 2026-07-17 22:25:16 -04:00
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specs/v2/remote-workspace-execution.md
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@ -255,6 +255,9 @@ Daytona is the next comparison because its public API directly supports
filesystem operations, command sessions, interruption, and durable stop/pause filesystem operations, command sessions, interruption, and durable stop/pause
semantics. Modal follows with an intentionally different binding transition: semantics. Modal follows with an intentionally different binding transition:
suspension snapshots the filesystem and reconnection creates a new Sandbox. suspension snapshots the filesystem and reconnection creates a new Sandbox.
Its process handles do not expose per-process termination, so an adapter needs
an explicit provider-side mechanism that terminates a command and its children;
client fiber interruption alone is insufficient.
E2B can provide a fourth validation through pause/resume if the first three E2B can provide a fourth validation through pause/resume if the first three
leave meaningful ambiguity. leave meaningful ambiguity.
@ -491,5 +494,11 @@ The following concerns are real but do not expand the first milestone:
Disposable Daytona, Modal, and Vercel tracer experiments informed this plan and Disposable Daytona, Modal, and Vercel tracer experiments informed this plan and
were removed after review. Vercel was exercised live through create, reconnect, were removed after review. Vercel was exercised live through create, reconnect,
file I/O, foreground command interruption, stop, resume with retained files, file I/O, foreground command interruption, stop, resume with retained files,
and deletion. Daytona and Modal adapters were type-checked but not run because and deletion. A later Modal live tracer exercised create, reconnect by Sandbox
ID, the direct filesystem API, foreground commands, command timeout cleanup,
filesystem snapshot, restoration into a new Sandbox, files that survived
restoration and remained writable, and Sandbox deletion. In the timeout check,
the command was no longer running and the Python SDK resolved with `-1` rather
than raising. Neither the current Python nor JavaScript process handle exposes
direct per-process termination. Daytona was type-checked but not run because
credentials were unavailable. credentials were unavailable.