diff --git a/install b/install
index 2cb4dd4..fe99448 100755
--- a/install
+++ b/install
@@ -22,7 +22,7 @@
 #   * setup-identity and install-hardware are dropped. They exist only to
 #     consume interview answers -- git identity, NVIDIA, Secure Boot, firmware
 #     -- and every one of those is a first-run decision.
-#   * install-packages runs only when the package lists actually changed.
+#   * install-packages runs only when its tracked installation inputs changed.
 #   * Migrations always run rather than baseline. See the migrations block.
 #
 # Everything else is shared on purpose: the sudo keepalive, the per-stage
@@ -64,12 +64,15 @@ done
 
 source "$PANAMA_PATH/bin/ascii"
 
-# ── Have the package lists changed? ──────────────────────────────────────────
+# ── Have the installation inputs changed? ───────────────────────────────────
 #
 # install-packages is the slow stage -- a dnf metadata refresh, a Flathub
 # round-trip, and a transaction that resolves to "nothing to do" almost every
-# time. On an upgrade it is worth running only when the lists it reads actually
-# changed, so this hashes them and remembers the result.
+# time. On an upgrade it is worth running only when its package lists or
+# reviewed installer trust inputs changed, so this hashes them and remembers
+# the result. The framed, sorted stream includes top-level package files, the
+# package-stage adapter, the provenance helper, and regular provenance files;
+# both relative paths and bytes are part of the state.
 #
 # A content hash rather than a git range, because Panama is developed in place:
 # a package added to a list and not yet committed must still install. A range
@@ -86,8 +89,21 @@ STATE_DIR="${XDG_STATE_HOME:-$HOME/.local/state}/panama"
 PACKAGES_HASH="$STATE_DIR/packages-hash"
 
 hash_packages() {
-  find "$PANAMA_PATH/setup/packages" -maxdepth 1 -type f -exec sha256sum {} + \
-    | sort | sha256sum | cut -d' ' -f1
+  local file relative size
+
+  {
+    find "$PANAMA_PATH/setup/packages" -maxdepth 1 -type f -print0
+    printf '%s\0' \
+      "$PANAMA_PATH/setup/scripts/install-packages" \
+      "$PANAMA_PATH/setup/lib/artifact-provenance"
+    find "$PANAMA_PATH/setup/provenance" -type f -print0
+  } | LC_ALL=C sort -z | while IFS= read -r -d '' file; do
+    relative="${file#"$PANAMA_PATH"/}"
+    size="$(wc -c <"$file")"
+    printf '%s\0%s\0' "$relative" "$size"
+    cat -- "$file"
+    printf '\0'
+  done | sha256sum | cut -d' ' -f1
 }
 
 packages_needed() {
diff --git a/setup/scripts/link-vicinae-scripts b/setup/scripts/link-vicinae-scripts
index da80fb3..843ee33 100755
--- a/setup/scripts/link-vicinae-scripts
+++ b/setup/scripts/link-vicinae-scripts
@@ -81,7 +81,7 @@ if [[ -d "$extensions_source" ]] && command -v npm >/dev/null 2>&1; then
         [[ -f "$extension/package.json" ]] || continue
         name="$(basename "$extension")"
 
-        # Skip a build that would produce what is already there. `npm install`
+        # Skip a build that would produce what is already there. `npm ci`
         # alone takes long enough to be worth not repeating on every re-run of
         # a stage that is otherwise nearly instant.
         built="$vicinae_data_dir/extensions/$name"
@@ -91,7 +91,7 @@ if [[ -d "$extensions_source" ]] && command -v npm >/dev/null 2>&1; then
         fi
 
         printf 'Building Vicinae extension %s\n' "$name"
-        if ! (cd "$extension" && npm install --silent >/dev/null 2>&1 && npm run build >/dev/null 2>&1); then
+        if ! (cd "$extension" && npm ci --silent >/dev/null 2>&1 && npm run build >/dev/null 2>&1); then
             printf 'Vicinae extension %s did not build; skipping\n' "$name" >&2
         fi
     done
diff --git a/tests/setup/launcher-search-contract b/tests/setup/launcher-search-contract
index bc44f37..c38b592 100755
--- a/tests/setup/launcher-search-contract
+++ b/tests/setup/launcher-search-contract
@@ -116,6 +116,41 @@ grep -q '/etc/profile.d/nvm.sh' "$stage" \
 git -C "$repo_dir" check-ignore -q "$extension/node_modules" 2>/dev/null \
     || note 'the extension node_modules is not gitignored'
 
+# npm must honour the committed dependency graph. This disposable fixture
+# simulates npm rejecting a mismatched lockfile, which must leave that lockfile
+# untouched and keep the launcher stage nonfatal.
+fixture_root="$(mktemp -d -t panama-vicinae-lock.XXXXXX)"
+trap 'rm -rf -- "$fixture_root"' EXIT
+mkdir -p "$fixture_root/config/local/share/vicinae/scripts" \
+    "$fixture_root/config/local/share/vicinae/extensions/panama-search/src" \
+    "$fixture_root/bin"
+printf '{"name":"panama-search","dependencies":{"left-pad":"1.3.0"}}\n' \
+    >"$fixture_root/config/local/share/vicinae/extensions/panama-search/package.json"
+printf '{"lockfileVersion":3,"packages":{}}\n' \
+    >"$fixture_root/config/local/share/vicinae/extensions/panama-search/package-lock.json"
+lockfile="$fixture_root/config/local/share/vicinae/extensions/panama-search/package-lock.json"
+lock_before="$fixture_root/package-lock.before"
+cp -- "$lockfile" "$lock_before"
+cat >"$fixture_root/bin/npm" <<'EOF'
+#!/usr/bin/env bash
+printf '%s\n' "$*" >>"${NPM_LOG:?}"
+[[ "${1:-}" == ci ]] || exit 64
+exit 1
+EOF
+chmod +x "$fixture_root/bin/npm"
+stage_status=0
+stage_output="$(PATH="$fixture_root/bin:$PATH" PANAMA_PATH="$fixture_root" \
+    VICINAE_DATA_DIR="$fixture_root/vicinae-data" NPM_LOG="$fixture_root/npm.log" \
+    bash "$stage" 2>&1)" || stage_status=$?
+[[ "$stage_status" -eq 0 ]] \
+    || note "the Vicinae stage returned $stage_status for a lockfile mismatch instead of remaining nonfatal"
+[[ "$(<"$fixture_root/npm.log")" == 'ci --silent' ]] \
+    || note 'the Vicinae extension dependency command was not npm ci --silent'
+[[ "$stage_output" == *'Vicinae extension panama-search did not build; skipping'* ]] \
+    || note 'a nonzero Vicinae extension dependency install did not fail the extension build'
+cmp -s -- "$lock_before" "$lockfile" \
+    || note 'a rejected Vicinae lockfile mismatch changed package-lock.json'
+
 # ── Report ───────────────────────────────────────────────────────────────────
 
 if (( ${#findings[@]} > 0 )); then
diff --git a/tests/setup/package-provenance-contract b/tests/setup/package-provenance-contract
index c8b07c3..c63fc2c 100755
--- a/tests/setup/package-provenance-contract
+++ b/tests/setup/package-provenance-contract
@@ -128,6 +128,19 @@ if (( ${#unsafe_installers[@]} > 0 )); then
     fail 'replace each finding with a reviewed, verified installation path'
 fi
 
+# Re-running install-packages must be keyed to every reviewed trust input it
+# consumes. The update-command fixture proves each input changes the digest;
+# this public-boundary guard keeps any of those inputs from being silently
+# removed from the installer state definition.
+for state_input in \
+    'setup/packages' \
+    'setup/scripts/install-packages' \
+    'setup/lib/artifact-provenance' \
+    'setup/provenance'; do
+    grep -Fq "$state_input" "$repo_dir/install" \
+        || fail "packages hash does not name required state input: $state_input"
+done
+
 # This must be the only production file sourced by the contract.
 # shellcheck source=../../setup/lib/artifact-provenance
 source "$repo_dir/setup/lib/artifact-provenance"
diff --git a/tests/setup/update-command-contract b/tests/setup/update-command-contract
index 5d781fd..388141a 100755
--- a/tests/setup/update-command-contract
+++ b/tests/setup/update-command-contract
@@ -46,11 +46,15 @@ build_fixture() {
     local root="$1" packages_rc="${2:-0}" trust_rc="${3:-0}"
     rm -rf "$root"
     mkdir -p "$root/bin" "$root/setup/scripts" "$root/setup/packages" \
+             "$root/setup/lib" "$root/setup/provenance/keys" \
              "$root/config/dot/quickshell/scripts"
 
     cp "$installer" "$root/install"
     : >"$root/bin/ascii"
-    printf 'base-package\n' >"$root/setup/packages/base"
+    printf 'base-package\n' >"$root/setup/packages/core-packages"
+    printf 'artifact provenance\n' >"$root/setup/lib/artifact-provenance"
+    printf 'reviewed installer inputs\n' >"$root/setup/provenance/installers.conf"
+    printf 'reviewed key\n' >"$root/setup/provenance/keys/fixture.asc"
 
     local stage
     for stage in "${STAGE_NAMES[@]}"; do
@@ -210,7 +214,7 @@ grep -qx 'install-packages' <<<"$ran_forced" \
     || note '--packages did not force install-packages to run'
 
 # A changed list brings the stage back.
-printf 'another-package\n' >>"$tmp/a/setup/packages/base"
+printf 'another-package\n' >>"$tmp/a/setup/packages/core-packages"
 install_status=0
 ran_changed="$(run_install "$tmp/a" --upgrade)" || install_status=$?
 [[ "$install_status" -eq 0 ]] \
@@ -218,6 +222,24 @@ ran_changed="$(run_install "$tmp/a" --upgrade)" || install_status=$?
 grep -qx 'install-packages' <<<"$ran_changed" \
     || note 'a changed package list did not bring install-packages back'
 
+# The package stage consumes more than package lists. Each reviewed input must
+# independently invalidate a recorded package state so an upgrade cannot keep
+# using a stale trust or installer policy.
+for state_input in \
+    'setup/scripts/install-packages installer adapter' \
+    'setup/lib/artifact-provenance provenance helper' \
+    'setup/provenance/installers.conf installer provenance' \
+    'setup/provenance/keys/fixture.asc provenance key'; do
+    read -r relative label <<<"$state_input"
+    printf 'changed %s\n' "$label" >>"$tmp/a/$relative"
+    install_status=0
+    ran_input_changed="$(run_install "$tmp/a" --upgrade)" || install_status=$?
+    [[ "$install_status" -eq 0 ]] \
+        || note "install --upgrade failed after a $label change with status $install_status"
+    grep -qx 'install-packages' <<<"$ran_input_changed" \
+        || note "a changed $label did not bring install-packages back"
+done
+
 # A failing stage must not record the hash, or the failure is hidden forever.
 build_fixture "$tmp/c" 1
 install_status=0