feat(bootstrap): set hostname in Phase 0

Rename the machine to the name in the bundle's identity.json (default GURU-5070,
override with -Hostname) when run as admin, with an end-of-run reboot reminder.
Ensures scheduled tasks, coord session IDs, and log attribution line up. RESTORE.md
documents the step.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude/bootstrap/RESTORE.md

@@ -57,6 +57,11 @@ Copy-Item F:\claudetools-recovery\bootstrap\windows-bootstrap.ps1 $env:TEMP\boot
 F:\claudetools-recovery\bootstrap\windows-bootstrap.ps1 -SkipModels
 ```
 
+Run it from an **elevated** shell so Phase 0 can rename the machine to `GURU-5070`
+(read from the bundle's identity.json; override with `-Hostname <name>`). The rename
+needs a **reboot** to take effect — the script reminds you at the end. Re-run after the
+reboot to finish any phases that depend on the hostname.
+
 `-SkipModels` defers the ~50 GB Ollama downloads. Drop it (or run Phase 8 later) when
 you want them. Add `-RestoreData` to also pull back the large client data from `F:\...\data`.
 
@@ -67,6 +72,8 @@ just part of it: `-OnlyPhases "1,2,3"`.
 
 ## Manual path (if you'd rather do it by hand)
 
+0. **Set the hostname** (elevated): `Rename-Computer -NewName GURU-5070 -Restart`. Do this
+   first so scheduled tasks / coord session IDs line up after the reboot.
 1. **Install App Installer** (winget) from the Microsoft Store if missing.
 2. **Core tools** (winget ids):
    `Git.Git`, `OpenJS.NodeJS.LTS`, `Python.Python.3.14`, `Rustlang.Rustup`,

.claude/bootstrap/windows-bootstrap.ps1

@@ -46,6 +46,7 @@ param(
   [string]$GiteaHost = 'https://git.azcomputerguru.com',
   [string]$ClaudeToolsRoot = 'D:\claudetools',
   [string]$VaultRoot = 'D:\vault',
+  [string]$Hostname,          # target computer name; default = identity.json .machine, else GURU-5070
   [string]$OnlyPhases
 )
 $ErrorActionPreference = 'Stop'
@@ -72,6 +73,21 @@ if (Phase 0 'Preflight') {
   Ok "winget present: $((Get-Command winget).Source)"
   $script:Bundle = Find-Bundle
   if ($script:Bundle) { Ok "recovery bundle: $script:Bundle" } else { Warn "no recovery bundle found - secret/identity restore phases will be skipped" }
+
+  # Hostname - a fresh Windows install is DESKTOP-xxxxx; identity.json + scheduled tasks
+  # + coord session IDs all expect the real name. Rename needs admin and a reboot to apply.
+  $target = $Hostname
+  if (-not $target -and $script:Bundle -and (Test-Path "$script:Bundle\identity\identity.json")) {
+    try { $target = (Get-Content "$script:Bundle\identity\identity.json" -Raw | ConvertFrom-Json).machine } catch {}
+  }
+  if (-not $target) { $target = 'GURU-5070' }
+  if ($env:COMPUTERNAME -ne $target) {
+    $isAdmin = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)
+    if ($isAdmin) {
+      try { Rename-Computer -NewName $target -Force -ErrorAction Stop; $script:RebootNeeded = $true; Ok "hostname: $env:COMPUTERNAME -> $target (takes effect after reboot)" }
+      catch { Warn "rename to '$target' failed: $($_.Exception.Message)" }
+    } else { Warn "hostname is '$env:COMPUTERNAME', target '$target' - run this script as Administrator to rename (or manually: Rename-Computer -NewName $target -Restart)" }
+  } else { Ok "hostname already '$target'" }
 }
 
 # ============================================================ PHASE 1
@@ -270,4 +286,8 @@ if (Phase 11 'Verify') {
   Write-Host "   Verify vault: bash $ClaudeToolsRoot/.claude/scripts/vault.sh list"
 }
 
+if ($script:RebootNeeded) {
+  Write-Host "`n[REBOOT] Hostname was changed to '$target' - REBOOT for it to take effect." -ForegroundColor Yellow
+  Write-Host "         (scheduled tasks + coord session IDs read the hostname, so reboot before relying on them)"
+}
 Write-Host "`n[DONE] windows-bootstrap.ps1 complete." -ForegroundColor Green