diff --git a/skills/worklog/bin/preamble.sh b/skills/worklog/bin/preamble.sh
index 2634f60..5e72dfd 100755
--- a/skills/worklog/bin/preamble.sh
+++ b/skills/worklog/bin/preamble.sh
@@ -22,9 +22,10 @@ set -euo pipefail
 
 mode="${1:---full}"
 case "$mode" in
-  --minimal|--full) ;;
-  *) echo "usage: $0 [--minimal|--full]" >&2; exit 2 ;;
+  --minimal|--light|--full) ;;
+  *) echo "usage: $0 [--minimal|--light|--full]" >&2; exit 2 ;;
 esac
+[[ "$mode" == "--light" ]] && mode="--minimal"
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 # shellcheck source=_lib.sh
@@ -87,6 +88,10 @@ else
   printf 'PULL=skip (minimal)\n'
 fi
 
+# Re-compute counts after pull so roster-health comparison uses current state.
+active_total="$(find people -path '*/active/*.md' -type f 2>/dev/null | wc -l | tr -d '[:space:]')"
+active_namespace="$(find "people/$LDAP/active" -maxdepth 1 -name '*.md' -type f 2>/dev/null | wc -l | tr -d '[:space:]')"
+
 # Roster (fresh kernels JSON or a read-only raw Markdown fallback). The health
 # line is intentionally separate so fresh agents can tell degraded cache state
 # from "no work".
diff --git a/skills/worklog/modes/sync.md b/skills/worklog/modes/sync.md
index 82026ee..7c13929 100644
--- a/skills/worklog/modes/sync.md
+++ b/skills/worklog/modes/sync.md
@@ -4,7 +4,7 @@ One command handles every save path. Pick the first applicable in order; stop th
 
 ## Non-interactive guard
 
-If `$CLAUDE_HOOK` is set or stdin is not a TTY, skip conversation-WIP detection (it requires judgment). Fall through to autosave only.
+If `$CLAUDE_CODE_SESSION_ID`, `$CODEX_SESSION_ID`, `$CURSOR_SESSION_ID`, or `$OPENAI_SESSION_ID` is set — or stdin is not a TTY — skip conversation-WIP detection (it requires judgment). Fall through to autosave only.
 
 ## Precedence
 
diff --git a/skills/worklog/tests/init/test_light_init.sh b/skills/worklog/tests/init/test_light_init.sh
index 7760e94..95b376b 100755
--- a/skills/worklog/tests/init/test_light_init.sh
+++ b/skills/worklog/tests/init/test_light_init.sh
@@ -61,4 +61,31 @@ after_pull_mtime="$(stat -c %Y "$TMP/.cache/preamble-pull-stamp" 2>/dev/null ||
 [[ "$after_kernel_mtime" == "$before_kernel_mtime" ]]
 [[ "$after_pull_mtime" == "$before_pull_mtime" ]]
 
-echo "ok: default/light init routes to non-mutating minimal preamble"
+echo "ok: --minimal accepted (non-mutating)"
+
+# Restore fixture for --light test
+git -C "$TMP" checkout -- .
+printf '\ndirty\n' >> "$TMP/people/tester/active/light-init.md"
+before_status="$(git -C "$TMP" status --porcelain)"
+before_kernel_mtime="$(stat -c %Y "$TMP/.cache/compact-kernels.json" 2>/dev/null || stat -f %m "$TMP/.cache/compact-kernels.json")"
+before_pull_mtime="$(stat -c %Y "$TMP/.cache/preamble-pull-stamp" 2>/dev/null || stat -f %m "$TMP/.cache/preamble-pull-stamp")"
+
+WORKLOG_REPO="$TMP" WORKLOG_LDAP=tester \
+  "$WORKLOG_BIN/preamble.sh" --light >/dev/null
+
+after_status="$(git -C "$TMP" status --porcelain)"
+after_kernel_mtime="$(stat -c %Y "$TMP/.cache/compact-kernels.json" 2>/dev/null || stat -f %m "$TMP/.cache/compact-kernels.json")"
+after_pull_mtime="$(stat -c %Y "$TMP/.cache/preamble-pull-stamp" 2>/dev/null || stat -f %m "$TMP/.cache/preamble-pull-stamp")"
+
+[[ "$after_status" == "$before_status" ]]
+[[ "$after_kernel_mtime" == "$before_kernel_mtime" ]]
+[[ "$after_pull_mtime" == "$before_pull_mtime" ]]
+
+echo "ok: --light accepted and behaves identically to --minimal"
+
+# Adversarial: unknown flags must be rejected.
+if "$WORKLOG_BIN/preamble.sh" --bogus >/dev/null 2>&1; then
+  echo "FAIL: --bogus should have been rejected"
+  exit 1
+fi
+echo "ok: --bogus rejected (exit != 0)"