diff --git a/changelog/best-practice/claude-commands/changelog.md b/changelog/best-practice/claude-commands/changelog.md
index e27b88f..631ba13 100644
--- a/changelog/best-practice/claude-commands/changelog.md
+++ b/changelog/best-practice/claude-commands/changelog.md
@@ -288,3 +288,16 @@ No priority action items — report is fully in sync with official documentation
 ## [2026-05-01 03:31 PM PKT] Claude Code v2.1.126
 
 No priority action items — report is fully in sync with official documentation (15 frontmatter fields, 75 built-in commands).
+
+---
+
+## [2026-05-12 11:39 PM PKT] Claude Code v2.1.139
+
+| # | Priority | Type | Action | Status |
+|---|----------|------|--------|--------|
+| 1 | HIGH | New Command | Add `/background [prompt]` to Session tag — Detach current session to run as a background agent. Alias: `/bg` | ✅ COMPLETE (added as #69 in Session tag, count updated 75 → 80) |
+| 2 | HIGH | New Command | Add `/goal [condition\|clear]` to Session tag — Claude keeps working across turns until condition met (v2.1.139) | ✅ COMPLETE (added as #75 in Session tag) |
+| 3 | HIGH | New Command | Add `/radio` to Config tag — Open Claude FM lo-fi radio in your browser | ✅ COMPLETE (added as #12 in Config tag) |
+| 4 | HIGH | New Command | Add `/scroll-speed` to Config tag — Adjust mouse wheel scroll speed interactively (v2.1.139) | ✅ COMPLETE (added as #14 in Config tag) |
+| 5 | HIGH | New Command | Add `/stop` to Session tag — Stop the current background session; transcript and worktree are kept | ✅ COMPLETE (added as #80 in Session tag) |
+| 6 | LOW | Scope Decision | 6 bundled skills (`/batch`, `/claude-api`, `/debug`, `/fewer-permission-prompts`, `/loop`, `/simplify`) listed in upstream unified table but excluded per report scope | ❌ INVALID (recurring from v2.1.107 and v2.1.119 — user previously chose to keep report scoped to built-in commands only) |