Release/1.39.0-rc.4 (#2797)

* chore: bump version to 1.39.0 for release

* chore: bump to 1.39.0-rc.1

* chore: bump to 1.39.0-rc.2

* chore: bump to 1.39.0-rc.3

* chore: bump to 1.39.0-rc.4

* docs: add v1.39.0-rc.4 release notes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "get-shit-done-cc",
-  "version": "1.38.5",
+  "version": "1.39.0-rc.4",
   "description": "A meta-prompting, context engineering and spec-driven development system for Claude Code, OpenCode, Gemini and Codex by TÂCHES.",
   "bin": {
     "get-shit-done-cc": "bin/install.js",