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Preserve and recover cloud workspace files beyond the pilot checkpoint limit

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Évaluation

Difficulté
5/5
Temps estimé
Plus d'une semaine
Accessibilité débutants
12/100
Type d'issue
Fonctionnalité
Clarté
Plutôt claire
Activité
Active
Stack technique
git, typescript
Domaine
backend, cloud

Piste de recherche

Start in the services/compute pilot, reading the compute Durable Object's checkpoint code and its explicit lifecycle calls, including the 16 MiB limit and single retained generation. Measure full versus incremental capture of a real repository (transfer size and restore time) before choosing an approach. Done means a manifest is published only after complete data, a restore after container loss or resize brings back the staged, untracked, and ignored files with Git state intact, and an interrupted capture keeps the previous generation.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

Follow-up to #216 and the services/compute pilot.

The pilot keeps a full gzip/tar checkpoint in its compute Durable Object, limited to 16 MiB and one retained generation. Checkpoints happen through explicit lifecycle calls. A lost container can recover the last complete checkpoint, but work after that checkpoint can be lost. This is enough to test the workspace boundary; it does not provide the recovery guarantees needed for routine remote development.

Extend filesystem checkpointing and recovery while keeping channel messages, runs, and chats exclusively in pi. R2-backed snapshots and incremental file/block storage are candidates to measure, not features the pilot already implements. Start by comparing full and incremental captures on real repositories, including their transfer size and restoration time, then choose the simplest approach that meets the recovery window and storage limits.

Acceptance:

  • Preserve the full repository state: .git, refs, worktree metadata and absolute paths, staged and unstaged edits, untracked files, and ignored files. Keep dependency/cache exclusions explicit and reproduce required dependencies before work resumes; Git push alone is not a workspace backup.
  • Publish a checkpoint manifest only after its data is complete. Verify integrity before restoration, retain the previous valid generation on capture failure, and bound retention and cleanup of abandoned generations.
  • Define when checkpoints occur and the maximum expected recovery window. Expose the latest successful generation and capture failures so partial durability is not presented as every write being saved.
  • Quiesce filesystem writers before capture. Process memory and running daemons remain outside the checkpoint contract; document the stop/restart requirements instead of implying those processes survive restoration.
  • Restore a complete workspace at the recorded paths before allowing channel tools to resume. Missing or corrupt checkpoint data must preserve the recovery evidence and refuse an empty replacement.
  • Exercise real recovery after container loss and resizing with a dirty lane, staged changes, an untracked file, an ignored file, and an interrupted capture. Verify Git/worktree state and the restored file contents, as well as the reported recovery point.

Scope is filesystem durability and recovery. Desktop discovery, agent sizing decisions, and a second channel-history store are outside this issue.

Langage dominant
TypeScript
Étoiles
1
Forks
0
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