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feat: snapshot/restore checkpoints (SAND-WP-0007)

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Add workspace checkpoint API with SnapshotStore, extension hooks on
compose-ssh and saas-stub, manager orchestration, CLI/HTTP surface,
profile.compose-checkpoint, and docs/tests.
This commit is contained in:
Bernd Worsch
2026-06-24 07:57:40 +02:00
parent 2760ef2373
commit 952cebf2e9
21 changed files with 966 additions and 34 deletions
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10
docs/extension-sdk.md
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@@ -12,7 +12,10 @@ wait_ready(handle) → reachability dict
teardown(handle) → cleanup report dict
```
Optional (SaaS, deferred): `estimate_cost(profile, duration) → MeterQuote`
Optional (SaaS): `estimate_cost(profile, duration) → MeterQuote`
Optional (checkpoints): `supports_snapshots()`, `snapshot(handle)`,
`restore_from_snapshot(profile, snapshot_meta, inputs, host)`
### Base class
@@ -29,8 +32,9 @@ Reference implementations:
| Extension | Module | Mode |
|-----------|--------|------|
| `ext.compose-ssh` | `compose_ssh.py` | Remote compose stack |
| `ext.compose-ssh` | `compose_ssh.py` | Remote compose stack + tar snapshots |
| `ext.vm-packer` | `vm_packer.py` | Attach workspace on pre-built VM |
| `ext.saas-stub` | `saas_stub.py` | Metered stub + metadata snapshots |
## Registration
@@ -104,4 +108,4 @@ Implement `estimate_cost` and `meter_actual` on `SandboxExtension`. Register wit
| Packer build orchestration from `create` | Future WP |
| E2B / Modal / Daytona cloud adapters | Post SAND-WP-0006 |
| fin-hub billing export | Future |
| Snapshot / restore hooks | SAND-WP-0007 |
| Cross-host snapshot transfer | Future |