diff --git a/internal/skilldoc/source_cards_test.go b/internal/skilldoc/source_cards_test.go
new file mode 100644
index 0000000..2f76def
--- /dev/null
+++ b/internal/skilldoc/source_cards_test.go
@@ -0,0 +1,26 @@
+package skilldoc
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestChannelCardDisambiguatesFlashcatWorkspace(t *testing.T) {
+	body, err := os.ReadFile("../../skills/flashduty/reference/channel.md")
+	if err != nil {
+		t.Fatal(err)
+	}
+	text := string(body)
+	for _, want := range []string{
+		"协作空间",
+		"Flashcat workspace",
+		"灭火图",
+		"firemap",
+		"do not silently switch",
+	} {
+		if !strings.Contains(text, want) {
+			t.Errorf("channel card must disambiguate Flashduty channel vs Flashcat workspace; missing %q", want)
+		}
+	}
+}
diff --git a/skills/flashduty/reference/channel.md b/skills/flashduty/reference/channel.md
index 6b6f5b1..025bdc6 100644
--- a/skills/flashduty/reference/channel.md
+++ b/skills/flashduty/reference/channel.md
@@ -6,6 +6,8 @@ Prereq: `SKILL.md` read. **SKILL.md + this card = full competence on channels 
 
 "协作空间 / 频道 / 渠道 / 告警分组 / 降噪 / 静默 / 抑制 / 丢弃 / 升级策略 / 告警收敛 / channel / collaboration space / escalation rule / silence / inhibit / drop rule" → **channel**, NOT `incident` (incidents live _inside_ a channel) or `alert` (alerts are routed _into_ a channel). **`协作空间` (collaboration space) IS the `channel` API noun** — a naive translation would be "频道", but Flashduty's product surfaces it as 协作空间. Key IDs: **`channel-id` (int)** from `channel list`; **`rule-id` (MongoDB ObjectID string)** from `escalate-rule-list`, `inhibit-rule-list`, `silence-rule-list`, `unsubscribe-rule-list`.
 
+**Flashcat workspace exception.** When the user asks whether a "空间" is healthy, red/green, or specifically mentions **灭火图 / firemap**, do not assume they mean a Flashduty channel. In that context, "空间" may be a **Flashcat workspace**, and the answer must come from the Flashcat/firemap surface rather than channel incident stats. If you first resolved a name as a Flashduty `channel-id` and later resolve the same visible name as a Flashcat `workspace-id`, **do not silently switch** — tell the user these are different objects and state which ID/surface each conclusion uses.
+
 ## Intent → verb
 
 | want | verb |
@@ -38,6 +40,7 @@ fduty channel create --channel-name "production-api" --team-id <team-id> \
 # → returns channel_id; use it below
 
 # 3. add an escalation rule (all flags; layers is required via --data)
+# API field `person_ids` expects member IDs from `fduty member list`.
 fduty channel escalate-rule-create \
   --channel-id <channel-id> --rule-name "P1 on-call" --template-id <template-id> \
   --data '{"layers":[{"target":{"person_ids":[<member-id>],"by":{"critical":["voice","sms"],"warning":["feishu"]}},"notify_step":5,"max_times":3,"escalate_window":30}]}'