diff --git a/Makefile b/Makefile
index 877192f..0ea8e45 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,14 @@
 SHELL := /bin/bash
 SWIFT_FLAGS ?=
 
-.PHONY: help build test release run clean
+.PHONY: help build test coverage mutation-test release run clean
 
 help:
 	@printf "%s\n" \
 		"make build        - build the Swift package" \
 		"make test         - run Swift tests" \
+		"make coverage     - run source coverage gate" \
+		"make mutation-test - run mutation smoke checks" \
 		"make release      - build dist/icloud-cli and checksum" \
 		"make run ARGS=... - run the debug CLI" \
 		"make clean        - remove SwiftPM build outputs"
@@ -17,6 +19,12 @@ build:
 test:
 	swift test $(SWIFT_FLAGS)
 
+coverage:
+	bash scripts/ci/check-coverage.sh
+
+mutation-test:
+	bash scripts/ci/run-mutation-smoke.sh
+
 release:
 	swift build $(SWIFT_FLAGS) -c release
 	mkdir -p dist
diff --git a/Tests/ICloudCLICoreTests/CLIParserTests.swift b/Tests/ICloudCLICoreTests/CLIParserTests.swift
index 2c48e51..e7f07c8 100644
--- a/Tests/ICloudCLICoreTests/CLIParserTests.swift
+++ b/Tests/ICloudCLICoreTests/CLIParserTests.swift
@@ -37,6 +37,14 @@ import Testing
     #expect(options.safariDirectory.path == "/tmp/safari-fixture")
 }
 
+@Test func parsesHelpAndVersionShortcuts() throws {
+    #expect(try CLIParser().parse(arguments: ["icloud-cli"]) == .help)
+    #expect(try CLIParser().parse(arguments: ["icloud-cli", "-h"]) == .help)
+    #expect(try CLIParser().parse(arguments: ["icloud-cli", "--help"]) == .help)
+    #expect(try CLIParser().parse(arguments: ["icloud-cli", "-V"]) == .version)
+    #expect(try CLIParser().parse(arguments: ["icloud-cli", "--version"]) == .version)
+}
+
 @Test func rejectsInvalidSource() throws {
     #expect(throws: CLIParseError.invalidSource("icloud")) {
         try CLIParser().parse(arguments: ["icloud-cli", "safari", "tabs", "--source", "icloud"])
diff --git a/Tests/ICloudCLICoreTests/SafariTabsReaderTests.swift b/Tests/ICloudCLICoreTests/SafariTabsReaderTests.swift
index abff4ab..12cfe52 100644
--- a/Tests/ICloudCLICoreTests/SafariTabsReaderTests.swift
+++ b/Tests/ICloudCLICoreTests/SafariTabsReaderTests.swift
@@ -30,6 +30,35 @@ import Testing
     #expect(tabs[1].url == "https://openclaw.ai/docs")
 }
 
+@Test func parserKeepsHttpTabsAndFiltersNonWebUrls() {
+    let plist: [String: Any] = [
+        "Nested": [
+            "Tabs": [
+                [
+                    "url": "http://example.org/plain-http",
+                    "title": "Plain HTTP",
+                ],
+                [
+                    "TabURL": "ftp://example.org/not-web",
+                    "TabTitle": "FTP",
+                ],
+            ],
+        ],
+    ]
+
+    let tabs = SafariSessionPlistParser(sourceName: "fixture").parse(plist)
+
+    #expect(tabs == [
+        SafariTab(
+            url: "http://example.org/plain-http",
+            title: "Plain HTTP",
+            windowIndex: nil,
+            tabIndex: 0,
+            source: "fixture"
+        ),
+    ])
+}
+
 @Test func readerLoadsCurrentSessionPlist() throws {
     let tempRoot = try temporaryDirectory()
     defer { try? FileManager.default.removeItem(at: tempRoot) }
diff --git a/project.bootstrap.yaml b/project.bootstrap.yaml
index 19289d0..937f3b9 100644
--- a/project.bootstrap.yaml
+++ b/project.bootstrap.yaml
@@ -38,6 +38,8 @@ ci:
   fastChecks:
     - build
     - test
+    - coverage
+    - mutation
     - secrets
 release:
   enabled: false
diff --git a/scripts/ci/check-coverage.sh b/scripts/ci/check-coverage.sh
new file mode 100755
index 0000000..81ef41a
--- /dev/null
+++ b/scripts/ci/check-coverage.sh
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+minimum_line_coverage="${COVERAGE_MIN_LINES:-68}"
+module_cache="${CLANG_MODULE_CACHE_PATH:-$PWD/.build/module-cache}"
+mkdir -p "$module_cache"
+export CLANG_MODULE_CACHE_PATH="$module_cache"
+export SWIFTPM_MODULECACHE_OVERRIDE="${SWIFTPM_MODULECACHE_OVERRIDE:-$module_cache}"
+
+swift_args=()
+if [[ -n "${SWIFT_FLAGS:-}" ]]; then
+  # Intentional word splitting lets callers pass SwiftPM flags such as
+  # SWIFT_FLAGS="--disable-sandbox --scratch-path /tmp/icloud-cli-build".
+  read -r -a swift_args <<< "$SWIFT_FLAGS"
+fi
+
+if [[ "${#swift_args[@]}" -gt 0 ]]; then
+  swift test "${swift_args[@]}" --enable-code-coverage
+  coverage_json="$(swift test "${swift_args[@]}" --show-codecov-path)"
+else
+  swift test --enable-code-coverage
+  coverage_json="$(swift test --show-codecov-path)"
+fi
+
+source_line_coverage="$(
+  jq -r --arg prefix "$PWD/Sources/ICloudCLICore/" '
+    [.data[0].files[]
+      | select(.filename | startswith($prefix))
+      | .summary.lines]
+    | {count: (map(.count) | add), covered: (map(.covered) | add)}
+    | (.covered * 100 / .count)
+  ' "$coverage_json"
+)"
+
+printf 'Source line coverage: %.2f%% (minimum %.2f%%)\n' "$source_line_coverage" "$minimum_line_coverage"
+
+awk -v actual="$source_line_coverage" -v minimum="$minimum_line_coverage" '
+  BEGIN {
+    if (actual + 0 < minimum + 0) {
+      exit 1
+    }
+  }
+'
diff --git a/scripts/ci/run-fast-checks.sh b/scripts/ci/run-fast-checks.sh
index 949b3b1..1f5f576 100755
--- a/scripts/ci/run-fast-checks.sh
+++ b/scripts/ci/run-fast-checks.sh
@@ -6,6 +6,8 @@ bash scripts/ci/check-shell-syntax.sh
 bash scripts/check-detect-secrets.sh --all-files
 bash scripts/check-privacy-fixtures.sh
 swift test
+bash scripts/ci/check-coverage.sh
+bash scripts/ci/run-mutation-smoke.sh
 swift build
 swift build -c release
 swift run icloud-cli --help
diff --git a/scripts/ci/run-mutation-smoke.sh b/scripts/ci/run-mutation-smoke.sh
new file mode 100755
index 0000000..4cbdc71
--- /dev/null
+++ b/scripts/ci/run-mutation-smoke.sh
@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+module_cache="${CLANG_MODULE_CACHE_PATH:-$PWD/.build/module-cache}"
+mkdir -p "$module_cache"
+export CLANG_MODULE_CACHE_PATH="$module_cache"
+export SWIFTPM_MODULECACHE_OVERRIDE="${SWIFTPM_MODULECACHE_OVERRIDE:-$module_cache}"
+
+swift_args=()
+if [[ -n "${SWIFT_FLAGS:-}" ]]; then
+  read -r -a swift_args <<< "$SWIFT_FLAGS"
+fi
+
+run_swift_test() {
+  if [[ "${#swift_args[@]}" -gt 0 ]]; then
+    swift test "${swift_args[@]}"
+  else
+    swift test
+  fi
+}
+
+mutation_file=""
+backup_file=""
+
+restore_mutation() {
+  if [[ -n "$mutation_file" && -n "$backup_file" && -f "$backup_file" ]]; then
+    cp "$backup_file" "$mutation_file"
+  fi
+  if [[ -n "$backup_file" && -f "$backup_file" ]]; then
+    rm -f "$backup_file"
+  fi
+  mutation_file=""
+  backup_file=""
+}
+
+trap restore_mutation EXIT
+
+run_mutant() {
+  local name="$1"
+  local file="$2"
+  local needle="$3"
+  local replacement="$4"
+
+  mutation_file="$file"
+  backup_file="$(mktemp)"
+  cp "$file" "$backup_file"
+
+  NEEDLE="$needle" REPLACEMENT="$replacement" perl -0pi -e '
+    BEGIN { $needle = $ENV{"NEEDLE"}; $replacement = $ENV{"REPLACEMENT"}; }
+    $count = s/\Q$needle\E/$replacement/;
+    END { exit($count == 1 ? 0 : 2); }
+  ' "$file"
+
+  if run_swift_test >/tmp/icloud-cli-mutant.log 2>&1; then
+    echo "Mutation survived: $name" >&2
+    cat /tmp/icloud-cli-mutant.log >&2
+    exit 1
+  fi
+
+  echo "Mutation killed: $name"
+  restore_mutation
+}
+
+run_mutant \
+  "drop-http-url-support" \
+  "Sources/ICloudCLICore/SafariTabs.swift" \
+  'return ["http", "https"].contains(scheme)' \
+  'return ["https"].contains(scheme)'
+
+run_mutant \
+  "drop-tab-title-text-rendering" \
+  "Sources/ICloudCLICore/CommandRunner.swift" \
+  'if let title = tab.title {' \
+  'if false, let title = tab.title {'
+
+run_mutant \
+  "wrong-missing-cloud-tabs-failure-mode" \
+  "Sources/ICloudCLICore/CloudTabs.swift" \
+  'return "cloud-tabs-store-missing"' \
+  'return "cloud-tabs-store-unreadable"'
+
+run_mutant \
+  "disable-help-shortcut" \
+  "Sources/ICloudCLICore/CommandLine.swift" \
+  'if tokens.isEmpty || tokens.contains("--help") || tokens.contains("-h") {' \
+  'if tokens.isEmpty {'