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Addresses review feedback on the caching commit. Must-fix: the cache was not isolated by interpreter. `node-version: 22` floats across patch releases and turbo's global hash does not include the interpreter at all (`engines` is null in its dry-run cache inputs), so a runner moving to another 22.x would leave the workflow text and every task hash unchanged, restore the old cache through `restore-keys` and report green without executing anything. Both jobs now resolve `node --version` into a step output and carry it, plus `runner.arch`, in the cache key and the restore prefix. Must-fix: `actions/cache@v4` runs on the deprecated Node 20 runtime and was being force-migrated to Node 24 with a warning on every run. Moved to v6 -- the review suggested v5, but v6.1.0 is current and satisfies the same runner floor (>= 2.327.1; hosted runners are on 2.335.1). `test` no longer depends on `^typecheck`. It needs dependency sources in its hash, not a type check: a new hash-only `cache-inputs` transit task carries them. No package implements that script, so every node resolves to <NONEXISTENT> and nothing executes, while the edges still pull each dependency's files into the hash. Declared recursively so the chain survives a package gaining a purely transitive dependency. This returns the ~223 CPU-seconds the previous commit gave up: the cold test job goes from 7 tasks / 115.7s back to 4 tasks / 67.2s, and editing packages/ui still correctly re-runs the views, web and desktop suites while core:test stays cached. Corrects a comment that claimed `^test` would miss packages/ui because it has no test script. It would not -- turbo materialises a <NONEXISTENT> node that participates in hashing, verified against the dry graph. `^test` is still the wrong edge here, but because it serialises the suites behind each other, not for the stated reason. Also drops the stale note that tests no longer depend on `^typecheck`, and swaps the aggregate gate's `always()` for `!cancelled()` so a run superseded by a newer push does not spend a runner on a verdict nobody reads. Co-authored-by: multica-agent <github@multica.ai>