diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2040b0d..a27a232 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,4 +60,5 @@ jobs:
           cloc --version
           act --version
           ollama --version
+          tilt version
           codex --version
diff --git a/README.md b/README.md
index e9f8db0..2b3e58c 100644
--- a/README.md
+++ b/README.md
@@ -47,9 +47,10 @@ The following tools are installed (or skipped if already present):
 | [Node.js + npm](https://nodejs.org) | `brew install node` |
 | [`cloc`](https://github.com/AlDanial/cloc) | `brew install cloc` |
 | [`act`](https://github.com/nektos/act) | `brew install act` |
-| [Ollama](https://ollama.com) | `curl -fsSL https://ollama.com/install.sh | sh` |
+| [Ollama](https://ollama.com) | `brew install ollama` |
 | [codex-cli](https://github.com/openai/codex) | `npm install -g @openai/codex` |
 | [Codexbar](https://github.com/steipete/CodexBar) | `brew install --cask steipete/tap/codexbar` |
+| [Tilt](https://tilt.dev) | `brew install tilt` |
 
 The script is **idempotent** — re-running it is safe and will skip anything already installed.
 
diff --git a/install.sh b/install.sh
index 639f3fa..bf6ba8e 100755
--- a/install.sh
+++ b/install.sh
@@ -142,6 +142,14 @@ else
   echo "📊 Codexbar is already keeping watch from the menu bar."
 fi
 
+# 17. Tilt — local dev environment orchestrator
+if ! command -v tilt &>/dev/null; then
+  echo "🔦 Tilt not found. The dev environment needs orchestrating. Installing..."
+  brew install tilt
+else
+  echo "🔦 Tilt is already illuminating the Severed Floor."
+fi
+
 echo ""
 echo "✅ Macrodata Refinement environment initialised."
 echo "   The work is mysterious and important. Praise Kier. 🫱"
diff --git a/test/install.bats b/test/install.bats
index 60b8033..63ff76c 100644
--- a/test/install.bats
+++ b/test/install.bats
@@ -442,6 +442,28 @@ EOF
   [[ "$output" == *"Ollama is already running"* ]]
 }
 
+# ---------------------------------------------------------------------------
+# Tilt section
+# ---------------------------------------------------------------------------
+
+@test "installs Tilt when tilt is not on PATH" {
+  run env PATH="$MOCK_BIN" /bin/bash "$SCRIPT"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"Tilt not found"* ]]
+}
+
+@test "skips Tilt when tilt is already installed" {
+  cat > "$MOCK_BIN/tilt" <<'EOF'
+#!/bin/bash
+exit 0
+EOF
+  chmod +x "$MOCK_BIN/tilt"
+
+  run bash "$SCRIPT"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"Tilt is already illuminating"* ]]
+}
+
 # ---------------------------------------------------------------------------
 # End-to-end: all tools already present
 # ---------------------------------------------------------------------------
@@ -454,7 +476,7 @@ EOF
 
 @test "exits successfully when all tools are already installed" {
   # Stubs for every command-based tool
-  for tool in gcloud oc gh uvx python3 gws node cloc act ollama codex; do
+  for tool in gcloud oc gh uvx python3 gws node cloc act ollama codex tilt; do
     cat > "$MOCK_BIN/$tool" <<'EOF'
 #!/bin/bash
 exit 0
@@ -486,4 +508,5 @@ EOF
   [[ "$output" == *"act is already running scenes"* ]]
   [[ "$output" == *"Ollama is already running"* ]]
   [[ "$output" == *"Codexbar is already keeping watch"* ]]
+  [[ "$output" == *"Tilt is already illuminating"* ]]
 }