Add gastown postPatch bug fixes from jt flake

- Fix mail router normalization in validateRecipient
- Fix agentBeadToAddress to use title field for hq- prefixed beads
- Fix crew/polecat home paths (remove incorrect /rig suffix)
- Fix town root detection (RoleUnknown instead of RoleMayor)
- Fix copyDir symlink handling
- Pin to gastown commit 177094a matching jt flake

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

home/roles/development/default.nix

@@ -18,7 +18,7 @@ let
     pname = "gastown";
     version = "unstable-${gastownRev}";
     src = globalInputs.gastown;
-    vendorHash = "sha256-ripY9vrYgVW8bngAyMLh0LkU/Xx1UUaLgmAA7/EmWQU=";
+    vendorHash = "sha256-+qaxEZgC2u51O458p3ZqZ333E/R0iRb+uKhKn8GcJJo=";
     subPackages = [ "cmd/gt" ];
     doCheck = false;
 
@@ -31,6 +31,65 @@ let
       "-X github.com/steveyegge/gastown/internal/cmd.BuiltProperly=1"
     ];
 
+    # Bug fixes not yet merged upstream
+    postPatch = ''
+      # Fix validateRecipient bug: normalize addresses before comparison
+      # See: https://github.com/steveyegge/gastown/issues/TBD
+      substituteInPlace internal/mail/router.go \
+        --replace-fail \
+          'if agentBeadToAddress(agent) == identity {' \
+          'if AddressToIdentity(agentBeadToAddress(agent)) == AddressToIdentity(identity) {'
+
+      # Fix agentBeadToAddress to use title field for hq- prefixed beads
+      substituteInPlace internal/mail/router.go \
+        --replace-fail \
+          'return parseAgentAddressFromDescription(bead.Description)' \
+          'if bead.Title != "" && strings.Contains(bead.Title, "/") { return bead.Title }; return parseAgentAddressFromDescription(bead.Description)'
+
+      # Fix crew/polecat home paths: remove incorrect /rig suffix
+      substituteInPlace internal/cmd/role.go \
+        --replace-fail \
+          'return filepath.Join(townRoot, rig, "polecats", polecat, "rig")' \
+          'return filepath.Join(townRoot, rig, "polecats", polecat)' \
+        --replace-fail \
+          'return filepath.Join(townRoot, rig, "crew", polecat, "rig")' \
+          'return filepath.Join(townRoot, rig, "crew", polecat)'
+
+      # Fix town root detection: don't map to Mayor (causes spurious mismatch warnings)
+      substituteInPlace internal/cmd/prime.go \
+        --replace-fail \
+          'if relPath == "." || relPath == "" {
+		ctx.Role = RoleMayor
+		return ctx
+	}
+	if len(parts) >= 1 && parts[0] == "mayor" {' \
+          'if relPath == "." || relPath == "" {
+		return ctx // RoleUnknown - town root is shared space
+	}
+
+	// Check for mayor role: mayor/ or mayor/rig/
+	if len(parts) >= 1 && parts[0] == "mayor" {'
+
+      # Fix copyDir to handle symlinks (broken symlinks cause "no such file" errors)
+      # See: https://github.com/steveyegge/gastown/issues/TBD
+      substituteInPlace internal/git/git.go \
+        --replace-fail \
+          'if entry.IsDir() {' \
+          '// Handle symlinks (recreate them, do not follow)
+		if entry.Type()&os.ModeSymlink != 0 {
+			linkTarget, err := os.Readlink(srcPath)
+			if err != nil {
+				return err
+			}
+			if err := os.Symlink(linkTarget, destPath); err != nil {
+				return err
+			}
+			continue
+		}
+
+		if entry.IsDir() {'
+    '';
+
     meta = with lib; {
       description = "Gas Town - multi-agent workspace manager by Steve Yegge";
       homepage = "https://github.com/steveyegge/gastown";