fix(core): deliver post-boot mountFs reconfiguration reliably to the native sidecar

[NathanFlurry]

• mountFs/unmountFs now return a promise that settles once the sidecar has applied the mount; delivery failures reject instead of being swallowed.
• Runtime mount reconfigures resend the boot packages/packagesMountAt/toolShimCommands: Rust configure_vm rebuilds the whole VM configuration from each payload, so omitting them stripped the /opt/agentos projections and tool shims as a side effect of a post-boot mount.
• Runtime linkSoftware packages are retained too, so a later mountFs no longer unprojects them.
• The Rust client mount_fs remains in-process-only; sidecar-visible runtime mounts there are a follow-up.

[NathanFlurry]

Stack for rivet-dev/agentos

• fix(core): deliver post-boot mountFs reconfiguration reliably to the native sidecar #1656 nyvvsyxp · 2026-07-08 02:56:17 👈
• fix(native-sidecar): resolve js_bridge mount-root realpath without a bridge round-trip #1655 wmqznzol · 2026-07-08 02:56:16
• fix(agentos-sidecar): harden the close_session already-exited short-circuit #1654 mkkuuouw · 2026-07-08 02:56:15
• feat(runtime-core): validate, test, and document the sidecar frame timeout override #1653 rwrqkykq · 2026-07-08 02:56:14
• main

Get stack: forklift get 1656
Push local edits: forklift submit
Merge when ready: forklift merge 1656

[NathanFlurry]

Note: GitHub auto-marked this PR as merged when the stack was reordered (its head became reachable from the stack base branch). This change is NOT in main yet — it continues as #1660.