chore(memory-bank): record the docs on GitHub and the version decisions

- Decision 9: keep the documentation on GitHub; no Read the Docs site,
  and the wiki is retired. Decision 4 now rests on it.
- Work package 3 redefined and PR-ready; work package 4 decisions:
  PowerShellVersion 5.1, DotNetFrameworkVersion 4.5.2, RootModule, and
  5.0.0 with the PassThur alias.
- Correct the Windows PowerShell 5.1 recipe (don't clear PSModulePath),
  and record the local build from the NuGet cache, the link-check
  limits, and the deleted fork behind the Read the Docs project.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: AI Assistant <ai@example.com>

.memory-bank/activeContext.md

@@ -1,6 +1,6 @@
 ---
 status: current
-last-verified: 2026-10-02
+last-verified: 2026-10-04
 owner: active-agent
 source: current task evidence
 ---
@@ -9,26 +9,29 @@ source: current task evidence
 
 ## Current focus
 
-Work packages 1 (#92) and 2 (#93) are merged. Next is work package 3 (Read
-the Docs), after the maintainer's go-ahead, on the local branch
-`ai/read-the-docs`, which so far carries Memory Bank notes only. The
-remaining packages and their details are in `progress.md`.
+Work package 3 was redefined by the maintainer: no Read the Docs, the docs
+stay on GitHub, and the wiki is retired (Decision 9). It is PR-ready on the
+local branch `ai/docs-on-github` (`84328dc` plus Memory Bank notes). Work
+package 4 (manifest and version) continues next, stacked on it, with the
+maintainer's decisions recorded in `progress.md`.
 
 ## Evidence
 
-- #92 was merged with a merge commit (`d917832`) and #93 squash-merged
-  (`14799fb`); the tree of `master` equals the tested `c9fbaf5`.
-- AppVeyor: the PR build of #93 (54834295) and the `master` build of
-  `14799fb` (54834350) each passed 218 of 218 Pester tests, listed once
-  each on the Tests tab; the `master` build of `d917832` passed too.
-- The remote branches `ai/housekeeping` and `ai/ship-help` are deleted, and
-  so are the local ones. The only unmerged commit, the remote-mutation note
-  (`9dc2022`), is now `023506c` on `ai/read-the-docs`.
-- The agent can't push or open PRs (`techContext.md`, Constraints): it
-  prepares the commands and PR descriptions, and the maintainer runs them.
+- All 256 relative links in `Docs`, `README.md`, and `CHANGELOG.md` resolve,
+  including 5 anchors checked against GitHub's slug rules; MarkdownLinkCheck
+  0.2.0 (CI step 02) finds 0 broken links in `Docs` in Windows PowerShell
+  5.1; markdownlint reports 0 issues in the changed pages.
+- The documented manual install (`Unblock-File`, `Expand-Archive` into
+  `$env:ProgramFiles\WindowsPowerShell\Modules`) was tested with the 4.2.6
+  zip in a `$env:TEMP` sandbox: the module imports under `RemoteSigned`.
+  `Expand-Archive` doesn't pass the download mark on; File Explorer's zip
+  handler does, and the import then fails.
+- The wiki stopped at 4.2.4; the Gallery has 4.2.5 (2019-07-11) and 4.2.6
+  (2019-07-12), whose notes were reconstructed from `4.2.4..4.2.6`.
+- The local branch `ai/read-the-docs` keeps the dropped strict-build work
+  (`886c874`, `325ec76`); delete it once it is no longer wanted.
 
 ## Next step
 
-Wait for the maintainer's go-ahead for work package 3. Nothing on
-`ai/read-the-docs` needs pushing before then; its Memory Bank commits go
-into the work package 3 PR.
+Ask which assemblies follow the module version, then implement work
+package 4 test-first on a branch stacked on `ai/docs-on-github`.

.memory-bank/decisions/0004-online-help-on-github.md

@@ -1,7 +1,7 @@
 ---
 status: accepted
 date: 2026-10-02
-last-verified: 2026-10-02
+last-verified: 2026-10-04
 owner: shared
 source: PR #91 (moved from systemPatterns.md)
 ---
@@ -10,5 +10,6 @@ source: PR #91 (moved from systemPatterns.md)
 
 - Choice: `online version` of every cmdlet page is
   `https://github.com/raandree/NTFSSecurity/blob/master/Docs/Cmdlets/<Name>.md`.
-- Rationale: The Read the Docs project builds a stale fork, so its URLs show
-  outdated pages; GitHub always shows `master`.
+- Rationale: GitHub renders the docs of `master`, and there is no other
+  documentation site (Decision 9). Originally chosen because the Read the
+  Docs project built a stale fork.

.memory-bank/decisions/0009-docs-on-github.md

@@ -0,0 +1,25 @@
+---
+status: accepted
+date: 2026-10-04
+last-verified: 2026-10-04
+owner: shared
+source: maintainer decision in work package 3
+---
+
+# Decision 9: Keep the documentation on GitHub
+
+- Choice: The documentation lives in `Docs` and `README.md`, and GitHub
+  renders it. There is no documentation site: the Read the Docs and MkDocs
+  configuration is removed. The GitHub wiki is retired: its version history
+  and installation steps moved to `Docs/Version-History.md` and
+  `Docs/README.md`, and the maintainer turns the wiki off.
+- Rationale: One source of truth that is versioned with the code, reviewed
+  in pull requests, and checked by AppVeyor. The Read the Docs project
+  `ntfssecurity` belongs to `Sup3rlativ3` and points to a fork that no
+  longer exists; a wiki is edited outside pull requests and CI.
+- Consequences: `online version` links stay on GitHub (Decision 4). Section
+  anchors follow GitHub's rules. `Docs/index.md` became `Docs/README.md`, so
+  that GitHub shows it when you open the `Docs` folder.
+- Rejected: taking over or re-importing the Read the Docs project with a
+  strict MkDocs build (prepared on the local branch `ai/read-the-docs`, not
+  merged), and publishing `Docs` to the wiki.

.memory-bank/progress.md

@@ -1,6 +1,6 @@
 ---
 status: current
-last-verified: 2026-10-02
+last-verified: 2026-10-04
 owner: active-agent
 source: repository evidence
 ---
@@ -34,6 +34,10 @@ from the 4.2.6 release only by the `Remove-Item2 -PassThru` rename and
   upload had listed 870), six cmdlet-page links reworded for the help
   text. AppVeyor passed 218 of 218 on the PR (54834295) and on `master`
   (54834350).
+- 2026-10-04: The maintainer dropped Read the Docs: the docs stay on GitHub
+  and the wiki is retired (Decision 9). Work package 3 committed locally on
+  `ai/docs-on-github` (`84328dc`). The strict Read the Docs build prepared
+  before stays unmerged on the local branch `ai/read-the-docs`.
 
 ## Stable capabilities
 
@@ -52,39 +56,35 @@ next package starts only after the maintainer's go-ahead.
 
 1. Housekeeping: done (#92).
 2. Ship help: done (#93).
-3. Read the Docs, next. The local branch `ai/read-the-docs` exists and so
-   far carries Memory Bank notes only. The project `ntfssecurity`
-   (`https://app.readthedocs.org/projects/ntfssecurity/`) is maintained by
-   GitHub user `Sup3rlativ3` and builds the fork `Sup3rlativ3/NTFSSecurity`
-   (last build about 2021); the repository side is ready
-   (`.readthedocs.yml`, `Docs/requirements.txt`). The switch happens in the
-   Read the Docs dashboard. Give the maintainer exact steps for both
-   options: (a) `Sup3rlativ3` adds him as maintainer and changes the
-   repository URL, or (b) he imports `raandree/NTFSSecurity` as a new
-   project (the slug `ntfssecurity` is taken). Ask before installing Python
-   for `mkdocs build --strict`. After the switch, confirm a build of
-   `master`, propose whether the `online version` links move to Read the
-   Docs (Decision 4), and add a documentation link to `README.md`. Done
-   when Read the Docs builds `master` of this repository and shows the
-   current pages.
-4. Manifest and version: remove `Show-NTFSSimpleAccess` and the duplicate
-   inheritance entries from `CmdletsToExport` (exactly 36 cmdlets
-   exported). Versions disagree: manifest 4.2.5, tag and Gallery 4.2.6,
-   `AssemblyVersion` 4.2.1.0. Propose the next SemVer version with and
-   without `[Alias('PassThur')]` on `Remove-Item2 -PassThru` (the rename in
-   #64 is breaking), plus `PowerShellVersion` and `DotNetFrameworkVersion`
-   (manifest 2.0 and 3.5; the assemblies target .NET Framework 4.5.2), and
-   ask. Move the `[Unreleased]` entries into the new version section (ask
-   whether the build-only "Read the Docs build configuration" entry stays,
-   Decision 7) and align `AssemblyInfo`. No tag or publish. Done when
-   `Test-ModuleManifest` passes, 36 cmdlets are exported, and CI is green.
-   Inputs: `Test-ModuleManifest` already fails on
-   `PowerShellVersion = '2.0'` with `CompatiblePSEditions`; releases are
-   Debug builds published with the whole output folder (`.pdb`, `.xml`,
-   `System.Management.Automation.dll`), which `FileList` doesn't list.
-   Before the next build and `Publish-Module`, clean
-   `C:\Program Files\WindowsPowerShell\Modules\NTFSSecurity`, or the removed
-   `NTFSSecurity-Help.xml` ships again.
+3. Docs on GitHub (was: Read the Docs), PR-ready on `ai/docs-on-github`:
+   Read the Docs and MkDocs configuration removed, `Docs/index.md` renamed
+   to `Docs/README.md`, the wiki's version history and install steps moved
+   into `Docs` (with reconstructed notes for 4.2.5 and 4.2.6), contributor
+   guide updated. After the merge, the maintainer turns the wiki off, points
+   the notes of releases 4.2.4 and 4.2.6 to `Docs/Version-History.md`, and
+   may ask `Sup3rlativ3` to delete the Read the Docs project.
+4. Manifest and version, in progress, stacked on `ai/docs-on-github`.
+   Maintainer decisions: `PowerShellVersion` 5.1, `DotNetFrameworkVersion`
+   4.5.2, `RootModule` instead of `ModuleToProcess`; version 5.0.0 with
+   `[Alias('PassThur')]` on `Remove-Item2 -PassThru` (the changelog lists
+   `-PassThur` under Deprecated); the changelog entry about the
+   documentation site is gone (work package 3). Open: which assemblies
+   follow the module version. Remove `Show-NTFSSimpleAccess` and the
+   duplicate inheritance entries from `CmdletsToExport` (exactly 36
+   cmdlets exported), move the `[Unreleased]` entries into the 5.0.0
+   section, and align `AssemblyInfo`. No tag or publish. Done when
+   `Test-ModuleManifest` passes in Windows PowerShell 5.1 and PowerShell 7,
+   36 cmdlets are exported, the versions agree, and CI is green.
+   Baseline: `Test-ModuleManifest` fails in both editions
+   (`CompatiblePSEditions` needs `PowerShellVersion` 5.1) and warns about
+   `ModuleToProcess`; 41 `CmdletsToExport` entries, 37 unique; versions:
+   manifest 4.2.5, `NTFSSecurity` 4.2.1.0, `Security2` 3.2.3.0,
+   `PrivilegeControl` 1.0.0.0, `ProcessPrivileges` 1.5.7.0 (vendored);
+   `Log` isn't shipped. Releases are Debug builds published with the whole
+   output folder (`.pdb`, `.xml`, `System.Management.Automation.dll`), which
+   `FileList` doesn't list. Before the next build and `Publish-Module`,
+   clean `C:\Program Files\WindowsPowerShell\Modules\NTFSSecurity`, or the
+   removed `NTFSSecurity-Help.xml` ships again.
 5. Code defects, listed below: `review: on`, one PR per group, regression
    test first. Pester 5 tests import `NTFSSecurity\bin\Release`, run in a
    `$env:TEMP` sandbox and in `appveyor.yml` (pattern:

.memory-bank/projectbrief.md

@@ -19,8 +19,9 @@ Source: `README.md`, `NTFSSecurity/NTFSSecurity.psd1`.
 ## Scope
 
 - In scope: module source (`NTFSSecurity`, `Security2`, `PrivilegeControl`,
-  `ProcessPrivileges`), module manifest and type/format data, the MkDocs
-  documentation site in `Docs/`, and `README.md`.
+  `ProcessPrivileges`), module manifest and type/format data, the
+  documentation in `Docs/` (rendered by GitHub, Decision 9), and
+  `README.md`.
 - Out of scope: registry security. `Security2/Registry/RegistrySecurity.cs`
   exists, but no registry cmdlet is exported.
 - Distribution: PowerShell Gallery package `NTFSSecurity` and GitHub releases.
@@ -28,8 +29,9 @@ Source: `README.md`, `NTFSSecurity/NTFSSecurity.psd1`.
 ## Stakeholders
 
 - Maintainer and author: Raimund Andree (`raandree`), per the manifest.
-- Documentation contributors: James Smith (`mkdocs.yml` `site_author`);
-  the AppVeyor documentation build runs under the `Sup3rlativ3` account.
+- Documentation contributors: James Smith (`site_author` in the former
+  `mkdocs.yml`) and `Sup3rlativ3` (#62), who owns the Read the Docs project
+  `ntfssecurity` and a second AppVeyor project.
 - End users: To confirm beyond the README summary.
 
 ## Acceptance criteria

.memory-bank/systemPatterns.md

@@ -1,6 +1,6 @@
 ---
 status: current
-last-verified: 2026-10-02
+last-verified: 2026-10-04
 owner: active-agent
 source: repository evidence
 ---
@@ -55,6 +55,7 @@ Each Decision record is a file in `decisions/`; read only the relevant ones.
 | 6 | [CI checks the docs against a build of the source](decisions/0006-ci-checks-docs-against-build.md) |
 | 7 | [CHANGELOG lists user-visible changes only](decisions/0007-changelog-user-visible-only.md) |
 | 8 | [Commit the generated help file and check it in CI](decisions/0008-commit-generated-help.md) |
+| 9 | [Keep the documentation on GitHub](decisions/0009-docs-on-github.md) |
 
 ## Patterns
 
@@ -62,6 +63,10 @@ Each Decision record is a file in `decisions/`; read only the relevant ones.
 
 - Run platyPS in Windows PowerShell 5.1 against a module build; a copy of
   `Docs/Cmdlets` must round-trip through `Update-MarkdownHelp` unchanged.
+- GitHub renders the docs (Decision 9). AppVeyor's link check covers only
+  relative links in `Docs` and ignores anchors, so check anchors against
+  GitHub's slug rules (lowercase, punctuation removed, spaces to hyphens)
+  and the links in `README.md` and `CHANGELOG.md` separately.
 - platyPS rewrites non-ASCII punctuation such as em dashes; keep cmdlet pages
   ASCII-only.
 - In cmdlet pages, end a sentence with a link: platyPS renders a link as

.memory-bank/techContext.md

@@ -1,6 +1,6 @@
 ---
 status: current
-last-verified: 2026-10-02
+last-verified: 2026-10-04
 owner: active-agent
 source: repository evidence
 ---
@@ -19,8 +19,8 @@ source: repository evidence
 - Module: `NTFSSecurity.psd1` loads `NTFSSecurity.psm1` (aliases `dir2`,
   `gi2`, `rm2`, `del2`), `NTFSSecurity.Init.ps1` (Add-Type of the helper
   assemblies, prepends `NTFSSecurity.format.ps1xml`), and `NTFSSecurity.dll`.
-- Documentation: MkDocs (`mkdocs.yml`, theme `readthedocs`, `docs_dir: ./Docs`)
-  built by Read the Docs (`.readthedocs.yml` v2); cmdlet pages are platyPS
+- Documentation: Markdown in `Docs` and `README.md`, rendered by GitHub; no
+  documentation site and no wiki (Decision 9). Cmdlet pages are platyPS
   0.14 markdown (schema 2.0.0) in `Docs/Cmdlets`.
 - Help: `NTFSSecurity\en-US\NTFSSecurity.dll-Help.xml`, generated from
   `Docs/Cmdlets` and committed (Decision 8).
@@ -39,11 +39,25 @@ source: repository evidence
   package; the legacy C# 5 compiler fails with CS0136. `dotnet msbuild`
   fails on the binary resources in `Resources.resx` (MSB3822, MSB3823).
 - platyPS 0.14.2, Pester 5.7.1, PSScriptAnalyzer, and powershell-yaml are
-  installed only for PowerShell 7. Windows PowerShell 5.1 imports platyPS
-  and Pester by full path
+  installed only for PowerShell 7. Windows PowerShell 5.1, started from
+  PowerShell 7, imports platyPS and Pester by full path
   (`~\OneDrive\Documents\PowerShell\Modules\platyPS\0.14.2`,
-  `C:\Program Files\PowerShell\Modules\Pester\5.7.1`) with
-  `$env:PSModulePath` cleared. MarkdownLinkCheck is not installed.
+  `C:\Program Files\PowerShell\Modules\Pester\5.7.1`). Leave
+  `$env:PSModulePath` alone: PowerShell 7 hands the child the Windows
+  PowerShell default path, and clearing it leaves Windows PowerShell without
+  its core modules (Pester fails: `Add-Member` not found).
+- MarkdownLinkCheck is not installed, and `Save-Module` crashed (FailFast)
+  in PowerShell 7.6 on 2026-10-04. Download the 0.2.0 package from
+  `https://www.powershellgallery.com/api/v2/package/MarkdownLinkCheck/0.2.0`
+  into `$env:TEMP`, extract it, and import it by path.
+- The workstation is ARM64; PowerShell 7 runs as x64 under emulation.
+  Python 3.12.10 (ARM64) is installed per user with winget, the
+  maintainer's choice for an MkDocs check that Decision 9 made unnecessary.
+- The NuGet cache (`~\.nuget\packages`) holds every build dependency: copy
+  `alphafs\2.2.1`, `system.management.automation.dll\10.0.10586`, and
+  `microsoft.netframework.referenceassemblies.net452\1.0.3` into
+  `packages\<Id>.<Version>`, and point `CscToolPath` at
+  `microsoft.net.compilers\4.2.0\tools`.
 
 ## Constraints
 
@@ -64,8 +78,11 @@ source: repository evidence
   published manifest differs from the tag only by `ModuleVersion` (tags
   carry the previous version). GitHub releases attach `NTFSSecurity.zip`.
 - CI: AppVeyor project `raandree/ntfssecurity` builds branches and pull
-  requests. Read the Docs (`ntfssecurity`) and a second AppVeyor project are
-  attached to the fork `Sup3rlativ3/NTFSSecurity`.
+  requests. The Read the Docs project `ntfssecurity` (maintainer
+  `Sup3rlativ3`) and a second AppVeyor project are attached to the fork
+  `Sup3rlativ3/NTFSSecurity`, which no longer exists (GitHub 404,
+  2026-10-04). That site still serves pages from 2020 and isn't used
+  (Decision 9).
 - `Get-FileHash2` fails in PowerShell 7; all other cmdlets passed a smoke
   test in PowerShell 7.6.
 - `CHANGELOG.md` lists user-visible changes only; CI and build-only changes
@@ -103,10 +120,13 @@ source: repository evidence
 - Help file: `New-ExternalHelp -Path .\Docs\Cmdlets -OutputPath
   .\NTFSSecurity\en-US -Force` must leave `git status` unchanged.
 - Pester: run detached (`Start-DetachedPowerShell.ps1`) in Windows
-  PowerShell 5.1; a run without `bin\Release\en-US` must fail.
+  PowerShell 5.1: the launcher starts `pwsh`, and its payload runs
+  `powershell.exe -NoProfile -EncodedCommand` with Pester imported by full
+  path. A run without `bin\Release\en-US` must fail.
 - Markdown lint: `npx markdownlint-cli2` with `MD013` limited to prose
   (tables, code, and headings excluded) on the conceptual pages.
-- YAML: `ConvertFrom-Yaml` (powershell-yaml) on `mkdocs.yml`,
-  `.readthedocs.yml`, and `appveyor.yml`; every `nav` target must exist.
-- MkDocs needs Python, which this workstation does not have; `mkdocs build
-  --strict` was not run.
+- YAML: `ConvertFrom-Yaml` (powershell-yaml) on `appveyor.yml`.
+- Links: AppVeyor step 02 (MarkdownLinkCheck 0.2.0) checks only relative
+  links in `Docs`; it strips anchors and skips absolute URLs. Check anchors
+  against GitHub's heading slugs, and the links in `README.md` and
+  `CHANGELOG.md`, with a script.