diff --git a/lib/profiles/backend.profile b/lib/profiles/backend.profile
index f769e4e..7b7c2d7 100644
--- a/lib/profiles/backend.profile
+++ b/lib/profiles/backend.profile
@@ -34,8 +34,9 @@ guard
 learn
 retro
 
-# Plugin: PR review toolkit (pre-merge audit)
-pr-review-toolkit                 plugin@claude-code-plugins
+# pr-review-toolkit removed (audit 2026-07-02 #12 — ~2.2k tokens, PR-only):
+# enable per PR session via `bash lib/profile.sh apply audit` or
+# claude plugin enable pr-review-toolkit@claude-code-plugins
 
 # CLIs (advisory)
 ctx7                              cli
diff --git a/lib/profiles/full.profile b/lib/profiles/full.profile
index 220959b..75fb1c1 100644
--- a/lib/profiles/full.profile
+++ b/lib/profiles/full.profile
@@ -79,7 +79,12 @@ emil-design-eng                   external
 frontend-design                   external
 design-motion-principles          external
 ui-ux-pro-max                     plugin@ui-ux-pro-max-skill
-pr-review-toolkit                 plugin@claude-code-plugins
+# pr-review-toolkit REMOVED from full (audit 2026-07-02 #12): heaviest
+# single plugin cost (~2.2k tokens of agent descriptions/session), useful
+# only when reviewing PRs. Reactivate per PR session:
+#   claude plugin enable pr-review-toolkit@claude-code-plugins
+# or profile-based: bash lib/profile.sh apply audit (audit.profile keeps it;
+# a later `set full` re-disables it — MANAGED_PLUGINS lifecycle).
 magic                             mcp
 
 # === CLIs (advisory) =================================================
diff --git a/settings.json b/settings.json
index 8ecbde7..7c45404 100644
--- a/settings.json
+++ b/settings.json
@@ -230,7 +230,7 @@
     "ui-ux-pro-max@ui-ux-pro-max-skill": true,
     "security-guidance@claude-code-plugins": true,
     "superpowers@superpowers-marketplace": true,
-    "pr-review-toolkit@claude-code-plugins": true
+    "pr-review-toolkit@claude-code-plugins": false
   },
   "extraKnownMarketplaces": {
     "claude-code-plugins": {