The shared composite action ran 3 steps under `shell: pwsh`, making every
CI job depend on PowerShell on the Linux host. Rewrote them in bash and
dropped the dead $IsLinux / F:\CI branches (Phase B left a single Linux
host serving both windows-build and linux-build runners).
Closes Phase C / idea-3: no CI job or systemd timer requires pwsh on the
Linux host anymore. Ticked all C1-C8 subtask checkboxes and set the plans
to "C chiusa". pwsh is deliberately left installed (operator choice, not a
technical blocker).
- CLAUDE.md: Linux host no longer runs pwsh; PS 5.1 constraints scoped to
Windows guests + Windows runner.
- RUNBOOK: add "Phase C — Python equivalents" table; §6-§13 benchmark records
kept as historical provenance.
- TODO §3.7: close $IsWindows shim bug (resolved-by-replacement — bench run
bypasses the shim).
- plans: mark C1-C8 done + docs C9; flag operational cutover/uninstall pending.
Phase B is closed (checklist Passi 1–9 [x], benchmark matrix §6–§14
recorded). Move the two finished working docs into the dated archive:
plans/PhaseB-user-checklist.md → plans/archived/2026-06-07/
plans/benchmark-windows-host.md → plans/archived/2026-06-07/
plans/ now holds only the forward-looking plans (idea-3 Phase C pwsh
removal, idea-4 Phase D ESXi, ideas-overview). Fixed the live links that
pointed at the moved/relocated files: idea-3 §4, idea-2 §8 (relative path),
and ideas-overview (idea-1/idea-2 now under archived/, Phase A+B marked ✅).
- Add plans/idea-3-powershell-removal.md: Phase C goal is to eliminate
the pwsh dependency from the Linux host by porting the remaining PS
scripts (bench run, validate host, smoke run) to Python sub-commands.
- Update idea-3-esxi-support.md header: Fase C → Fase D.
- Update ideas-overview.md: new four-phase table (A/B/C/D) with
prerequisiti and criteri for Phase C.
- Rename all "Hook futuri Fase C" (ESXi) → "Hook futuri Fase D" in
implementation-plan-A-B.md; add Phase C/D entries to summary and
references section.
- Update PhaseB-user-checklist.md end note and CLAUDE.md to point
Phase C → pwsh removal, Phase D → ESXi.
Simone