docs: record the branch/release model + sanitize progress

Document the main=dev / v1=release-pointer model in flake.nix (where the
v1 ref is defined) and mark the repo-sanitize roadmap items shipped
(installer prune, option-table reconcile, settings untrack, branch
realignment).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -148,14 +148,21 @@ how to override it. Items marked ✓ are shipped.
   cache. Remaining (optional): a session-level `SSH_AUTH_SOCK` export so GUI
   clients launched outside a shell also see the agent.
 - **Sanitize & organize the repo:** a housekeeping pass for consistency
-  and clarity. Candidate targets (scope still to be defined): prune
+  and clarity.
-  now-redundant config (e.g. the installer still writes
+  - ✓ pruned now-redundant config: the installer no longer writes
-  `console.useXkbConfig` / `boot.initrd.systemd.enable` into `system.nix`,
+    `console.useXkbConfig` / `boot.initrd.systemd.enable` into `system.nix`
-  which are distro-wide defaults as of the LUKS-keymap fix); reconcile the
+    (distro-wide defaults since the LUKS-keymap fix), nor the offline-pin
-  README option tables with the actual `nomarchy.*` surface; audit
+    test fixture in `flake.nix`.
-  comments/docs for drift against the code; and re-check that every file
+  - ✓ reconciled the README option tables with the live `nomarchy.*`
-  still earns its place under the `modules`/`hosts`/`themes`/`pkgs`/`tools`
+    surface (added keys/fastfetch/snapper/greeter.autoLogin).
-  rule of thumb.
+  - ✓ untracked `.claude/settings.local.json` (machine-local) + gitignored.
+  - ✓ **branch/release model:** `main` is the development default; `v1` is
+    the release pointer downstreams pin (`?ref=v1`), advanced to main once
+    a batch is tested — rolling, no tags. Brought `main` current (it was a
+    stale legacy-merge), and deleted the dead `refactor` / `wave/nixos-26.05`
+    branches (kept `legacy` for history). See the comment in `flake.nix`.
+  - Remaining (optional): re-check that every file still earns its place
+    under the `modules`/`hosts`/`themes`/`pkgs`/`tools` rule of thumb.
 - **Full docs review & restructure:** a dedicated pass over all the prose,
   not just the code-adjacent cleanup the repo-sanitize item covers. The
   README has grown to ~540 lines with a ~200-line roadmap inline — the

flake.nix

@@ -51,8 +51,11 @@
           (nixpkgs.lib.concatStringsSep "\n"
             (builtins.attrNames nixos-hardware.nixosModules));
         nixpkgsPath = nixpkgs.outPath;
-        # v1 is the release branch: installed machines track it on
+        # Branch model: `main` is the development default; `v1` is the
-        # `nix flake update` instead of the forge's default branch.
+        # release pointer — the stable line for the NixOS 26.05 rewrite,
+        # advanced to main once a batch is tested (rolling, no tags). A
+        # future major bump would become `v2`. Installed machines track
+        # `?ref=v1` on `nix flake update`, not the forge's default branch.
         flakeUrl = "git+${gitUrl}?ref=v1";
         # Future updates re-resolve from the forge (original); the install
         # itself resolves from the ISO store (locked = path) — fully