`ConvertFrom-Json -AsHashtable` is PowerShell 7+ only, and the Windows 11
reference machine used to validate this PR ships with Windows PowerShell
5.1 only (no `pwsh` on PATH). Without this follow-up, running the
installer on stock Windows fails at the parse step and leaves the
installation half-applied.
- Fall back to a manual `PSCustomObject` -> `Hashtable` conversion when
`-AsHashtable` raises, so the script parses the existing
settings.local.json on both PS 5.1 and PS 7+.
- Normalize both hook buckets (`PreToolUse`, `PostToolUse`) and their
inner `hooks` arrays as `System.Collections.ArrayList` before
serialization. PS 5.1 `ConvertTo-Json` otherwise collapses
single-element arrays into bare objects, which breaks the canonical
PR #1524 shape.
- Create the `skills/continuous-learning/hooks` destination directory
when it does not exist yet, and emit a clearer error if
settings.local.json is missing entirely.
- Update `INSTALL-HOOK-WRAPPER-FIX-20260422.md` to document the PS 5.1
compatibility guarantee and to cross-link PR #1542 (companion simple
patcher).
Verified on Windows 11 / Windows PowerShell 5.1.26100.8115 by running
`powershell -NoProfile -ExecutionPolicy Bypass -File
docs/fixes/install_hook_wrapper.ps1` against a sandbox `$env:USERPROFILE`
and against the real settings.local.json. Both produce the canonical
PR #1524 shape with LF-only output.
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