Reconcile Gitea distribution with current alpha behavior and release tooling

Hop-State: A_06FN55REVAR7VQG4BWJBCD8
Hop-Proposal: R_06FN55QTEWKH16NSR59YJYG
Hop-Task: T_06FN3MBF98GWD4NA5PA1RWG
Hop-Attempt: AT_06FN55BQ80H2S8WHNDD24G0

wiki/Upgrading-and-Uninstalling.md

@@ -0,0 +1,70 @@
+# Upgrading and uninstalling
+
+## Upgrade packaged installations
+
+Rerun the installer. It replaces the binary and refreshes the embedded skill:
+
+```bash
+curl -fsSL https://githop.xyz/hop/hop/raw/branch/main/scripts/install.sh | sh
+```
+
+Pin a release when required:
+
+```bash
+curl -fsSL https://githop.xyz/hop/hop/raw/branch/main/scripts/install.sh | \
+  HOP_VERSION=v0.1.0 sh
+```
+
+Windows:
+
+```powershell
+irm https://githop.xyz/hop/hop/raw/branch/main/scripts/install.ps1 -OutFile install.ps1
+.\install.ps1 -Version v0.1.0
+Remove-Item install.ps1
+```
+
+After upgrading:
+
+```bash
+hop version
+hop skill install --force
+hop doctor
+```
+
+Restart Codex Desktop when the installed skill changed.
+
+## Upgrade Go installations
+
+```bash
+go install githop.xyz/hop/hop/cmd/hop@latest
+hop skill install --force
+```
+
+## Project migrations
+
+Hop opens and migrates older supported SQLite schemas automatically. Back up
+important repositories before alpha upgrades and read the release notes for any
+one-way schema change.
+
+## Uninstall the CLI and skill
+
+Unix default:
+
+```bash
+rm -f "$HOME/.local/bin/hop"
+rm -rf "${CODEX_HOME:-$HOME/.codex}/skills/hop"
+```
+
+Windows PowerShell:
+
+```powershell
+Remove-Item -Force "$env:LOCALAPPDATA\Programs\Hop\hop.exe"
+Remove-Item -Recurse -Force "$HOME\.codex\skills\hop"
+```
+
+Remove the Hop install directory from PATH if it is no longer used.
+
+Uninstalling the program does not delete project-local `.hop/` histories. That
+is intentional, so reinstalling restores access. Deleting a project's `.hop/`
+directory permanently removes its prompt graph, evidence, workspaces, and
+accepted Hop history; make a backup and treat that as destructive data removal.