diff --git a/src/views/flow/admin/def-editor/components/ConditionBox.vue b/src/views/flow/admin/def-editor/components/ConditionBox.vue
index 24c025a..0aa7820 100644
--- a/src/views/flow/admin/def-editor/components/ConditionBox.vue
+++ b/src/views/flow/admin/def-editor/components/ConditionBox.vue
@@ -3,7 +3,7 @@
 // 分支按出口名互斥选路（运行时调判断服务/表达式求值），分支尾隐式汇合到容器后继。
 // 分支头部的出口名 Input 即 contentJson 里 CONDITION 命名出边的 name（判断接口 outlets 契约）；
 // EXPRESSION 模式（2026-10-10）下分支头部再就地编辑出边 condition，序号即求值优先级。
-import { computed, inject, ref } from "vue";
+import { computed, inject, nextTick, ref } from "vue";
 import { BRANCH_LABELS, EDITOR_CTX, MAX_BRANCHES, MIN_BRANCHES, ConditionNode } from "../model";
 import NodeList from "./NodeList.vue";
 import ExprEvalModal from "@/views/flow/components/ExprEvalModal.vue";
@@ -45,6 +45,57 @@ function openTry(i: number): void {
     tryExpr.value = (props.node.conditions || [])[i] || "";
     tryVisible.value = true;
 }
+
+// ==================== 可用变量 chips（2026-10-14 议题一 P0）：内联提示 + 点击插入 ====================
+/** 可用变量（表单字段聚合键 + 内置），来自编辑器上下文；未拉到为空数组则不展示 chips */
+const availableVars = computed(() => ctx.availableVars || []);
+const BUILTIN_VARS = new Set([
+    "schId", "instanceId", "instanceVersion", "bizType", "bizId", "nodeId", "nodeName", "submitterId",
+]);
+const isBuiltin = (k: string): boolean => BUILTIN_VARS.has(k);
+
+/** Aviator 关键字/字面量：不参与"未知变量"提示 */
+const EXPR_KEYWORDS = new Set([
+    "true", "false", "nil", "null", "and", "or", "not", "if", "else", "elsif", "let", "while",
+    "for", "return", "in", "like", "new", "end", "break", "continue", "seq", "lambda",
+]);
+
+const condInputs = ref<Record<number, HTMLInputElement | null>>({});
+function setCondInput(el: any, i: number): void {
+    condInputs.value[i] = (el as HTMLInputElement) || null;
+}
+
+/** chips 点击：插入到该出口表达式光标处（无输入框时追加到末尾） */
+function insertChip(i: number, key: string): void {
+    const cur = (props.node.conditions || [])[i] || "";
+    const el = condInputs.value[i];
+    const s = el?.selectionStart ?? cur.length;
+    const e = el?.selectionEnd ?? cur.length;
+    editCondition(i, cur.slice(0, s) + key + cur.slice(e));
+    nextTick(() => {
+        const input = condInputs.value[i];
+        if (input) {
+            input.focus();
+            input.setSelectionRange(s + key.length, s + key.length);
+        }
+    });
+}
+
+/** 该出口表达式里不在可用列表中的标识符（疑似拼错提示，仅提示不拦截） */
+function unknownVars(i: number): string[] {
+    const cond = (props.node.conditions || [])[i] || "";
+    if (!cond.trim()) return [];
+    const stripped = cond
+        .replace(/'[^']*'|"[^"]*"/g, " ") // 字符串字面量
+        .replace(/[A-Za-z_][A-Za-z0-9_]*\s*\(/g, " ") // 函数名
+        .replace(/\.\s*[A-Za-z_][A-Za-z0-9_]*/g, " "); // 命名空间/属性访问
+    const known = new Set<string>([...availableVars.value, ...BUILTIN_VARS]);
+    const out = new Set<string>();
+    (stripped.match(/[A-Za-z_][A-Za-z0-9_]*/g) || []).forEach((t) => {
+        if (!EXPR_KEYWORDS.has(t) && !known.has(t)) out.add(t);
+    });
+    return Array.from(out);
+}
 </script>
 
 <template>
@@ -81,6 +132,7 @@ function openTry(i: number): void {
                 </div>
                 <div v-if="expression" class="cb-cond-row">
                     <input
+                        :ref="(el) => setCondInput(el, i)"
                         class="cb-cond"
                         :value="(node.conditions || [])[i] || ''"
                         placeholder="条件表达式，如 amount > 1000"
@@ -90,6 +142,23 @@ function openTry(i: number): void {
                     <!-- B5 内联试算：用真实办件变量跑该出口表达式（同「条件路由」页弹窗，预填表达式） -->
                     <span class="cb-try" title="用真实办件变量试算该表达式" @click.stop="openTry(i)">试算</span>
                 </div>
+                <!-- 议题一 P0：可用变量 chips（表单键 + 内置），点击插入到表达式光标处 -->
+                <div v-if="expression && availableVars.length" class="cb-vars">
+                    <span
+                        v-for="k in availableVars.slice(0, 14)"
+                        :key="k"
+                        class="cb-var"
+                        :class="{ bt: isBuiltin(k) }"
+                        :title="isBuiltin(k) ? '内置变量（引擎运行时注入）' : '表单变量（来自近期办件 formData）'"
+                        @click.stop="insertChip(i, k)"
+                    >{{ k }}</span>
+                    <span v-if="availableVars.length > 14" class="cb-vars-more" :title="availableVars.join('、')">
+                        +{{ availableVars.length - 14 }}
+                    </span>
+                </div>
+                <div v-for="(v, vi) in unknownVars(i)" :key="'u' + vi" class="cb-unknown">
+                    ⚠ 「{{ v }}」不在可用变量列表，若为动态变量可忽略
+                </div>
                 <NodeList :items="branch" :container="`${node.uid}:${i}`" />
                 <div v-if="!branch.length" class="cb-empty">该出口直达汇合点（直接通过）</div>
             </div>
@@ -231,6 +300,52 @@ function openTry(i: number): void {
     background: #f2fbf9;
     border-color: #0b7d72;
 }
+.cb-vars {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 5px;
+    margin: -2px 0 8px;
+}
+.cb-var {
+    font-size: 11px;
+    line-height: 16px;
+    padding: 0 8px;
+    border-radius: 999px;
+    border: 1px solid #b7e3dc;
+    background: #f2fbf9;
+    color: #0b7d72;
+    cursor: pointer;
+    user-select: none;
+    font-family: Consolas, Monaco, monospace;
+}
+.cb-var:hover {
+    background: #0b7d72;
+    color: #fff;
+    border-color: #0b7d72;
+}
+.cb-var.bt {
+    border-color: #dcdee2;
+    background: #f5f7fa;
+    color: #4e5969;
+}
+.cb-var.bt:hover {
+    background: #4e5969;
+    color: #fff;
+    border-color: #4e5969;
+}
+.cb-vars-more {
+    font-size: 11px;
+    line-height: 16px;
+    padding: 0 8px;
+    color: #86909c;
+    cursor: default;
+}
+.cb-unknown {
+    text-align: center;
+    font-size: 11px;
+    color: #ff9900;
+    margin: 0 0 8px;
+}
 .cb-col-del {
     flex: none;
     cursor: pointer;
diff --git a/src/views/flow/admin/def-editor/index.vue b/src/views/flow/admin/def-editor/index.vue
index 526280c..d821517 100644
--- a/src/views/flow/admin/def-editor/index.vue
+++ b/src/views/flow/admin/def-editor/index.vue
@@ -69,6 +69,8 @@ const depts = reactive<DeptOption[]>([]);
 const userNames = reactive<Record<number, string>>({});
 /** 条件分支的判断服务注册（flw_router；拉取失败为空数组，校验降级提示） */
 const routers = reactive<RouterOption[]>([]);
+/** 可用变量 chips：近期办件 formData 顶层键聚合（去重截 40）+ 内置变量；拉取失败仅内置 */
+const availableVars = reactive<string[]>([]);
 
 const issues = computed<Issue[]>(() => validateModel(model, depts, routers));
 const defJson = computed(() => toContentJson(model));
@@ -201,6 +203,27 @@ async function loadRouters(): Promise<void> {
     }
 }
 
+/** 表达式可用变量：近期 50 条办件 formData 顶层键聚合（去重截 40）+ 内置，口径同调试弹窗；失败仅内置 */
+const BUILTIN_VARS = ["schId", "instanceId", "instanceVersion", "bizType", "bizId", "nodeId", "nodeName", "submitterId"];
+async function loadVars(): Promise<void> {
+    const keys = new Set<string>();
+    try {
+        const rows: any[] = (await flowApi.adminInstances({ page: 1, size: 50 }).send())?.content || [];
+        rows.forEach((r) => {
+            try {
+                const v = JSON.parse(r.formDataJson || "{}");
+                if (v && typeof v === "object" && !Array.isArray(v)) Object.keys(v).forEach((k) => keys.add(k));
+            } catch {
+                /* 脏 formData 跳过，不影响其它办件的键聚合 */
+            }
+        });
+    } catch {
+        /* 办件列表拉取失败：退化为仅内置变量，不阻塞编辑 */
+    }
+    const merged = Array.from(new Set([...Array.from(keys).slice(0, 40), ...BUILTIN_VARS]));
+    availableVars.splice(0, availableVars.length, ...merged);
+}
+
 function applyParsed(parsed: ParsedDef): void {
     model.code = parsed.code || model.code;
     model.name = parsed.name || model.name;
@@ -217,6 +240,7 @@ async function load(): Promise<void> {
     try {
         await loadDepts();
         await loadRouters();
+        void loadVars();
         try {
             const rows: any[] = (await flowApi.appList().send()) || [];
             appOptions.value = rows
@@ -385,6 +409,7 @@ provide<EditorCtx>(EDITOR_CTX, {
     depts,
     userNames,
     routers,
+    availableVars,
     issueOf,
     openNode,
     removeNode,
diff --git a/src/views/flow/admin/def-editor/model.ts b/src/views/flow/admin/def-editor/model.ts
index 7dff7a7..ed74a2e 100644
--- a/src/views/flow/admin/def-editor/model.ts
+++ b/src/views/flow/admin/def-editor/model.ts
@@ -363,6 +363,8 @@ export interface EditorCtx {
     userNames: Record<number, string>;
     /** 条件分支的判断服务注册下拉（flw_router 启用项；拉取失败为空数组，校验降级提示） */
     routers: RouterOption[];
+    /** 可用变量 chips：近期办件 formData 顶层键聚合 + 内置变量（供条件表达式内联提示/插入） */
+    availableVars: string[];
     issueOf: (uid: string) => { level: "error" | "warn"; text: string }[];
     openNode: (uid: string) => void;
     removeNode: (uid: string) => void;