chore: add changeset for Windows OpenSpec fix

Add changeset for patch release to fix OpenSpec not working on Windows
when Codex integration is selected. Includes cross-platform path handling
and normalization fixes.

.changeset/windows-openspec-fix.md

@@ -0,0 +1,5 @@
+---
+"@fission-ai/openspec": patch
+---
+
+Fix OpenSpec not working on Windows when Codex integration is selected. This release includes fixes for cross-platform path handling and normalization to ensure OpenSpec works correctly on Windows systems.

src/core/configurators/slash/codex.ts

@@ -5,10 +5,11 @@ import { SlashCommandId, TemplateManager } from "../../templates/index.js";
 import { FileSystemUtils } from "../../../utils/file-system.js";
 import { OPENSPEC_MARKERS } from "../../config.js";
 
+// Use POSIX-style paths for consistent logging across platforms.
 const FILE_PATHS: Record<SlashCommandId, string> = {
-  proposal: path.join(".codex", "prompts", "openspec-proposal.md"),
-  apply: path.join(".codex", "prompts", "openspec-apply.md"),
-  archive: path.join(".codex", "prompts", "openspec-archive.md"),
+  proposal: ".codex/prompts/openspec-proposal.md",
+  apply: ".codex/prompts/openspec-apply.md",
+  archive: ".codex/prompts/openspec-archive.md",
 };
 
 export class CodexSlashCommandConfigurator extends SlashCommandConfigurator {

src/core/update.ts

@@ -106,9 +106,9 @@ export class UpdateCommand {
     }
 
     if (updatedSlashFiles.length > 0) {
-      summaryParts.push(
-        `Updated slash commands: ${updatedSlashFiles.join(', ')}`
-      );
+      // Normalize to forward slashes for cross-platform log consistency
+      const normalized = updatedSlashFiles.map((p) => p.replace(/\\/g, '/'));
+      summaryParts.push(`Updated slash commands: ${normalized.join(', ')}`);
     }
 
     const failedItems = [