Cache the VS Code download in CI

[Chirag6722]

Follow-up to #12, prompted by an actual red run rather than a hunch.

The merge of #9 to main failed on:

Failed to run tests
Error: connect ENETUNREACH 2603:1061:14:e0::1:443
code: 'ENETUNREACH'

That is the runner failing to reach the download server partway through fetching VS Code, not a test failure. It passed on retry with no code change. Every integration job currently re-downloads that build from scratch, so the job's reliability is tied to a network round trip it does not need to repeat.

This caches .vscode-test, keyed on runner OS and package.json, with a looser restore-keys prefix so a dependency bump reuses the existing build rather than starting cold. @vscode/test-electron re-downloads on its own if the version it wants is not in the cache, so a stale entry degrades to today's behaviour instead of breaking anything. .vscode-test is already gitignored.

Worth doing beyond the time saved: a job that goes red for reasons unrelated to the change is a job people stop reading, which on this repository in particular would be an odd thing to ship.

[Chirag6722]

@thegoodengineer thanks for the merges and for the commit access, that was quick.

Where things stand now that all nine are in:

main is green. I ran the merged result on Windows as well as CI, since the combination only existed once everything landed: #7 and #13 both rewrite recorder.ts, and #6 and #9 both feed the tree, so I wanted to see them together rather than trust eight individually green branches. 35 passing, 0 failing on Windows, and the Linux job is green on every commit since.

One thing to know about that red run on the #9 merge: it was ENETUNREACH partway through downloading VS Code, not a test failure. I confirmed it by re-running the same commit untouched, and it passed. #14 caches the download so a network blip cannot redden a clean run again, which felt worth fixing properly here rather than getting used to retrying, given what the extension is for.

Four issues are still open and I have deliberately not sent PRs for them, because each needs a call that is yours:

• Every recorded command rewrites the entire history to workspaceState #1 (the whole history rewritten to workspaceState per command) has three plausible fixes that trade off differently on how much output survives a reload. That is a product decision, not a cleanup.
• An already-open output tab keeps showing an execution that was cleared #3 stale output tab after clear
• package.json has no icon, so the extension shows a placeholder everywhere it is listed #4 the Marketplace icon, where I would be picking your extension's face for you
• logLines grows for the lifetime of the window and survives deactivate #5 unbounded logLines

Say which way you want any of them to go and I will do it.

Last thing before you cut a .vsix: package.json is still on 0.1.1, and main now has two changes users will actually notice. Unknown-exit entries no longer show up under "Failures Only", and a command whose terminal you close mid-run now leaves a grey "unknown" row where it previously left nothing at all. That probably wants a version bump and a line in the README's limitations section. Happy to open that one too if you want it.

[thegoodengineer]

Thanks for the writeup, and for catching that the #9 merge failure was network, not a real regression — good call confirming it with a clean re-run instead of just retrying and moving on.

Direction on the four:

• Every recorded command rewrites the entire history to workspaceState #1: debounce persist(). Keep full output persisted, just stop writing on the synchronous path after every command.
• An already-open output tab keeps showing an execution that was cleared #3: yes, fix it — fire Changed/Deleted for the affected ids from store.onDidChange.
• package.json has no icon, so the extension shows a placeholder everywhere it is listed #4: yes, export the existing icon.svg glyph at 128x128 PNG and wire up the top-level icon field. Keep media/** out of .vscodeignore so it actually ships.
• logLines grows for the lifetime of the window and survives deactivate #5: yes, ring buffer + reset in deactivate().

And yes, please open the version bump + README note too — go ahead and cut a PR for that whenever's convenient.