A run you can read

You see one line per task, the full log only for what failed, and one
summary at the bottom. Here 8 tasks run in parallel and one test fails:

$ vx run build test --filter packages/a --filter packages/b --filter packages/c --filter packages/d --force
 ⏺︎    13ms success miss     packages/d#build
 ⏺︎    15ms success miss     packages/a#test
 ⏺︎    18ms success miss     packages/a#build
 ⏺︎    19ms success miss     packages/b#build
 ⏺︎    13ms success miss     packages/c#test
 ⏺︎    12ms success miss     packages/d#test
 ◼︎    10ms failed  miss     packages/b#test
 ⏺︎     7ms success miss     packages/c#build

┌─ packages/b#test > failed (exit 1)

$ bun test

├─ OUTPUT ────────────────────────────────────────────────────

src/sum.test.ts:
2 | test('adds', () => { expect(2 + 2).toBe(5) })
                                       ^
error: expect(received).toBe(expected)

Expected: 5
Received: 4
…
└─ packages/b#test ── (10ms) failed (exit 1)

─ vx 0.0.0 ───────────────────────────────────────────────────
  projects  ▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▱▱▱▱▱▱▱▱▱▱▱▱▱▱▱▱▱
            4 affected · 6 total
  tasks     ▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰
            1 failed · 7 success · 8 total
  cache     ▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰
            local 7↑ · 1 miss

  info      4 workers · local cache · run 01a16aea-85b2-75d4-bb1c-d5c8ae6dd898
  time      59ms · max 19ms · avg 13ms · min 7ms

Demo workspace · vx 69617eb · 2026-10-23

Three parts, read top to bottom

--output-logs full gives every task its own frame, in the order they
finish. On CI the frames fold into log groups. vx last prints the
summary again later.

Fix the test and run again. Four tasks come from the cache, and the run
takes 30 ms.

More at vznjs.github.io/vx.

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Originally published on the vx blog. vx is open-source (MIT) task orchestration with a build cache: vznjs.github.io/vx · GitHub.

_{Written with AI assistance.}