[wan9chi]

Motivation

Cases referred to blobs through the file backend's storage. Its blob IDs were sequential, and corrupt_archive overwrote remote-cache/blobs/1 directly. Vite+'s Cloudflare remote cache stores blobs in R2 under random IDs, so those cases couldn't run against it.

Changes

• The tap numbers blobs in upload order in the request lines, e.g. GET /blob/1 200.
• remote-cache-server corrupt-blob NUMBER overwrites a stored blob through the backend. corrupt_archive uses it.
• The file backend uses random UUIDs as blob IDs, as the Worker does, so the numbering is already exercised here.

The only snapshot change is corrupt_archive's command line.

Stacked on #807.

🤖 Generated with Claude Code

---

Note

Low Risk
Changes are limited to Node test/daemon tooling and snapshot fixtures, not production vt cache client behavior.

Overview
Remote cache test tooling now matches production-style random UUID blob IDs instead of sequential numeric files, while keeping E2E snapshot logs stable by numbering blobs by upload order in tap output (e.g. GET /blob/1).

A new remote-cache-server corrupt-blob NUMBER command overwrites the nth stored blob through the backend control API; the corrupt_archive snapshot switches from direct vtt write-file on remote-cache/blobs/1 to this command. Docs and state.json drop next_blob_id; the backend exposes writeBlob for corruption from the daemon.

^{Reviewed by Cursor Bugbot for commit 1a7799e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

fspy benchmark

linux

dynamic/launch             change  +1.14%  [ -6.85% .. +10.04%]  overhead   +63.01%
dynamic/access             change  +0.76%  [ -5.33% .. +14.71%]  overhead   +22.99%
dynamic/access-relative    change  -0.60%  [-15.87% ..  +6.74%]  overhead   +68.69%
dynamic/access-contended   change  -1.62%  [-12.69% ..  +7.81%]  overhead    +2.87%
static/launch              change  -0.21%  [ -6.51% ..  +7.13%]  overhead  +199.03%
static/access              change  +0.80%  [-13.33% .. +13.13%]  overhead +1465.75%
static/access-relative     change  +1.92%  [-17.26% .. +22.81%]  overhead +1398.49%
static/access-contended    change  -1.39%  [-12.23% ..  +4.14%]  overhead +1096.40%

macos

dynamic/launch             change  +1.46%  [ -4.84% ..  +5.86%]  overhead  +256.44%
dynamic/access             change  +0.25%  [-15.23% ..  +8.08%]  overhead    +0.00%
dynamic/access-relative    change  -0.97%  [-50.07% ..  +5.98%]  overhead  +246.95%
dynamic/access-contended   change  +1.09%  [ -5.40% .. +10.71%]  overhead    +3.95%

windows

dynamic/launch             change  +0.00%  [ -1.12% ..  +1.20%]  overhead   +26.05%
dynamic/access             change  +0.00%  [ -0.57% ..  +0.59%]  overhead    +1.16%
dynamic/access-relative    change  +0.19%  [ -0.55% ..  +0.76%]  overhead    +1.16%
dynamic/access-contended   change  +0.00%  [ -0.69% ..  +0.72%]  overhead    +1.50%