diff --git a/.gitignore b/.gitignore
index 3e9b607..e9e6edf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,9 @@ Thumbs.db
 .vscode/
 .idea/
 *.swp
-*.swo
\ No newline at end of file
+*.swo
+
+# Generated script artifacts
+scripts/wasm-hashes.json
+scripts/sdk-compat-*.md
+target/coverage/
\ No newline at end of file
diff --git a/scripts/preflight-check.sh b/scripts/preflight-check.sh
new file mode 100755
index 0000000..16b9fb9
--- /dev/null
+++ b/scripts/preflight-check.sh
@@ -0,0 +1,154 @@
+#!/usr/bin/env bash
+# ────────────────────────────────────────────────────────────────
+# scripts/preflight-check.sh — Preflight Build Checks
+#
+# Validates that the contract workspace is ready for deployment:
+#   ✓ Compilation succeeds (debug + release)
+#   ✓ All tests pass
+#   ✓ Code formatting is correct
+#   ✓ Clippy lint passes
+#   ✓ Wasm artifacts are present (release profile)
+#
+# Usage:
+#   ./scripts/preflight-check.sh            # full validation
+#   ./scripts/preflight-check.sh --fast      # skip release build & all tests
+#   ./scripts/preflight-check.sh --ci        # same checks as CI pipeline
+#   ./scripts/preflight-check.sh --deploy    # full + wasm hash generation
+# ────────────────────────────────────────────────────────────────
+
+set -euo pipefail
+
+MODE="full"
+WORKSPACE_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+CONTRACTS_DIR="${WORKSPACE_DIR}/contracts"
+PASS=0
+FAIL=0
+
+# ── Parse arguments ────────────────────────────────────────────
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --fast)   MODE="fast"; shift ;;
+        --ci)     MODE="ci"; shift ;;
+        --deploy) MODE="deploy"; shift ;;
+        *)        echo "Unknown option: $1"; exit 1 ;;
+    esac
+done
+
+# ── Helper ─────────────────────────────────────────────────────
+pass() { PASS=$((PASS + 1)); echo "  ✅ PASS"; }
+fail() { FAIL=$((FAIL + 1)); echo "  ❌ FAIL"; }
+
+summary() {
+    local total=$((PASS + FAIL))
+    echo ""
+    echo "━━━ Preflight Summary ─────────────────────────────"
+    echo "  Result:  $([ "${FAIL}" -eq 0 ] && echo '✅ ALL PASSED' || echo '❌ SOME FAILED')"
+    echo "  Passed:  ${PASS} / ${total}"
+    echo "  Failed:  ${FAIL} / ${total}"
+    echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+    echo ""
+    [ "${FAIL}" -eq 0 ] || exit 1
+}
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "  Oraculum — Preflight Build Check                      "
+echo "  Mode: ${MODE}"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo ""
+
+cd "${CONTRACTS_DIR}"
+
+# ── 1. Formatting check ───────────────────────────────────────
+echo "─── Check 1: Code Formatting ───"
+if cargo fmt --all -- --check 2>&1; then
+    pass
+else
+    fail
+fi
+echo ""
+
+# ── 2. Clippy lint ────────────────────────────────────────────
+echo "─── Check 2: Clippy Lint ───"
+if cargo clippy --all-targets --all-features -- -D warnings 2>&1; then
+    pass
+else
+    fail
+fi
+echo ""
+
+# ── 3. Debug build ────────────────────────────────────────────
+echo "─── Check 3: Debug Build ───"
+if cargo build --all --verbose 2>&1; then
+    pass
+else
+    fail
+fi
+echo ""
+
+if [[ "${MODE}" != "fast" && "${MODE}" != "ci" ]]; then
+    # ── 4. Release build (wasm target) ──────────────────────
+    echo "─── Check 4: Release Build (wasm32) ───"
+    if cargo build --all --release --verbose 2>&1; then
+        pass
+
+        # Verify wasm artifacts exist
+        echo "  → Verifying wasm artifacts…"
+        WASM_COUNT=0
+        for wasm in target/wasm32-unknown-unknown/release/*.wasm; do
+            if [ -f "$wasm" ]; then
+                SIZE=$(stat --printf="%s" "$wasm" 2>/dev/null || stat -f%z "$wasm" 2>/dev/null || echo "?")
+                echo "    📦 $(basename "$wasm")  (${SIZE} bytes)"
+                WASM_COUNT=$((WASM_COUNT + 1))
+            fi
+        done
+        echo "  → ${WASM_COUNT} wasm artifact(s) generated."
+        [ "${WASM_COUNT}" -gt 0 ] && pass || fail
+    else
+        fail
+    fi
+    echo ""
+
+    # ── 5. Full test suite ──────────────────────────────────
+    echo "─── Check 5: Test Suite ───"
+    if cargo test --all --verbose 2>&1; then
+        pass
+    else
+        fail
+    fi
+    echo ""
+fi
+
+# ── Dependency audit (skipped in ci/fast mode) ────────────────
+if [[ "${MODE}" == "deploy" || "${MODE}" == "full" ]]; then
+    echo "─── Check 6: Dependency Audit ───"
+    if command -v cargo-audit &>/dev/null; then
+        if cargo audit 2>&1; then
+            pass
+        else
+            fail
+        fi
+    else
+        echo "  ⚠  cargo-audit not installed — skipping."
+        echo "  → Install: cargo install cargo-audit"
+        pass  # not a hard failure
+    fi
+    echo ""
+fi
+
+# ── 7. Release profile exists (skipped in fast mode) ─────────
+if [[ "${MODE}" != "fast" ]]; then
+    echo "─── Check 7: Release Profile ───"
+    if grep -q "\[profile\.release\]" Cargo.toml 2>/dev/null; then
+        echo "  ✓ Release profile configured"
+        pass
+    else
+        echo "  ⚠  No release profile found in Cargo.toml."
+        echo "  → Add a [profile.release] section with appropriate settings."
+        fail
+    fi
+fi
+echo ""
+
+# ── Final summary ────────────────────────────────────────────
+summary