First headless run of a newly-created profile hangs indefinitely (existing profiles and isolated DSH_HOMEs boot fine)

[BiBoyang]

Issue Draft (English) — 提交目标：deepseek-ai/deepseek-harness

状态：草稿，待 Owner 过目后提交。原始 sample/lsof 抓取未单独存档（当时以结论形式
记入测评 SUMMARY）——若维护者需要，可按本文 Reproduction 节当场重抓附上。

Title: First headless run of a newly-created profile hangs indefinitely (existing profiles and isolated DSH_HOMEs boot fine)

Summary

On dsh 0.1.7-rc.2, the first headless invocation of a newly-created profile under a real
DSH_HOME (~/.dsh) hangs forever — no output, no error, no network activity, no child
processes. Previously-initialized profiles work normally, and a fresh isolated DSH_HOME
boots cleanly on first run, so the defect is specific to the "new profile inside an existing
home" path.

Reproduction

1. With a real ~/.dsh that already contains at least one working profile (e.g. headless):
2. Create a new profile (we did it via dsh plugin --profile sweep-x add <any-npm-plugin>,
   which prints dsh: initialized profile sweep-x at ~/.dsh/profiles/sweep-x; an empty
   profile created after a version-gate rejection reproduces it too).
3. Run dsh --profile sweep-x "<any prompt>" (headless).
4. Observe: the process hangs indefinitely (observed 30+ minutes before manual kill).

Reproduced with three independent new profiles (sweep-modlens, sweep-routing,
sweep-control — the last with no third-party plugins at all), plus sweep-min
(empty profile). Existing profiles in the same home keep working throughout.

What was ruled out

• Network wait: lsof shows zero open connections from the hung process.
• Child processes: pgrep -P empty — nothing forked that could be waited on.
• stdin interaction: redirecting stdin from /dev/null changes nothing.
• Sample stack: sample <pid> shows a pure event-loop idle wait — no meaningful frames.

(Symptoms consistent with a promise that never settles during first-run initialization —
e.g. an import/migration step that awaits something already satisfied in pre-existing
profiles and skipped entirely in fresh isolated homes.)

Environment

• dsh: 0.1.7-rc.2 (built from source at 477b4f4, run via node --import tsx/esm apps/cli/src/bin.ts)
• OS: macOS (arm64) ｜ Node: v25.4.0 ｜ pnpm: 11.21.0
• Registry: npmmirror (direct, no proxy) — but network was confirmed idle during the hang.

Expected vs actual

Expected: first run of a new profile initializes and proceeds like any subsequent run
(isolated-home first runs do exactly this).
Actual: indefinite hang with no diagnostic output; only SIGKILL recovers.

Notes

• A version-compat gate elsewhere in the same build works correctly
  (dsh plugin add @deepseek-ai/dsh-headless is properly rejected against 0.1.7-rc.2
  with an allow-version hint), so profile machinery is not wholesale broken.
• Happy to attach fresh sample/lsof captures or run a debug/instrumented build —
  the repro is 100% deterministic on this machine.