diff --git a/.github/workflows/homebrew.yml b/.github/workflows/homebrew.yml
index c85b1c32..240d653c 100644
--- a/.github/workflows/homebrew.yml
+++ b/.github/workflows/homebrew.yml
@@ -2,25 +2,7 @@ name: Homebrew Install Smoke Tests
 
 on:
   push:
-    branches: ["main"]
-    paths:
-      - "jacs/**"
-      - "jacs-cli/**"
-      - "binding-core/**"
-      - "Cargo.toml"
-      - "Cargo.lock"
-      - "Formula/**"
-      - ".github/workflows/homebrew.yml"
-  pull_request:
-    branches: ["main"]
-    paths:
-      - "jacs/**"
-      - "jacs-cli/**"
-      - "binding-core/**"
-      - "Cargo.toml"
-      - "Cargo.lock"
-      - "Formula/**"
-      - ".github/workflows/homebrew.yml"
+    tags: ["v*", "cli/v*", "crate/v*"]
   workflow_dispatch:
 
 jobs:
diff --git a/.github/workflows/jacs-mcp.yml b/.github/workflows/jacs-mcp.yml
index 88d152c5..7918bdaf 100644
--- a/.github/workflows/jacs-mcp.yml
+++ b/.github/workflows/jacs-mcp.yml
@@ -23,6 +23,10 @@ on:
       - ".github/workflows/jacs-mcp.yml"
   workflow_dispatch:
 
+concurrency:
+  group: mcp-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
   CARGO_TERM_COLOR: always
 
diff --git a/.github/workflows/jacsgo.yml b/.github/workflows/jacsgo.yml
index cd0cb55d..79a84eb3 100644
--- a/.github/workflows/jacsgo.yml
+++ b/.github/workflows/jacsgo.yml
@@ -21,6 +21,10 @@ on:
       - ".github/workflows/jacsgo.yml"
   workflow_dispatch:
 
+concurrency:
+  group: go-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
   CARGO_TERM_COLOR: always
 
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index fd498a59..d5099692 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
         node-version: ['20']
 
     steps:
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index ba14afd6..81619fa4 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -21,6 +21,10 @@ on:
       - ".github/workflows/python.yml"
   workflow_dispatch: # Allows manual triggering
 
+concurrency:
+  group: python-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
   CARGO_TERM_COLOR: always
 
@@ -116,7 +120,7 @@ jobs:
           PY
 
   # Job to build wheels for CI coverage (PyPI package name is jacs)
-  # Only runs on pushes to main (not on PRs) to avoid slow QEMU aarch64 builds.
+  # macOS wheels built by release-pypi.yml on tagged releases only (macOS = 10x minute multiplier).
   build-jacs-wheels:
     name: Build jacs wheels on ${{ matrix.os }}
     if: github.event_name == 'push'
@@ -125,7 +129,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-14, macos-latest] 
+        os: [ubuntu-latest]
 
     steps:
       - name: Checkout code
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 87c78a97..585cc18b 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -38,7 +38,7 @@ on:
         default: false
         type: boolean
   schedule:
-    - cron: "0 9 * * *"
+    - cron: "0 9 * * 1"  # Weekly on Monday (was daily — saves ~150 min/month)
 
 env:
   CARGO_TERM_COLOR: always