feat(policy-file): move channel overrides to standalone channelPoliciesFile with hot reload

plugin/index.ts

@@ -1,5 +1,6 @@
+import fs from "node:fs";
 import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
-import { evaluateDecision, type Decision, type WhisperGateConfig } from "./rules.js";
+import { evaluateDecision, type ChannelPolicy, type Decision, type WhisperGateConfig } from "./rules.js";
 
 type DiscordControlAction = "channel-private-create" | "channel-private-update" | "member-list";
 
@@ -13,6 +14,10 @@ const MAX_SESSION_DECISIONS = 2000;
 const DECISION_TTL_MS = 5 * 60 * 1000;
 const END_MARKER_INSTRUCTION = "你的这次发言必须以🔚作为结尾。";
 
+let channelPoliciesCache: Record<string, ChannelPolicy> = {};
+let channelPoliciesFilePath = "";
+let channelPoliciesMtimeMs = -1;
+
 function normalizeChannel(ctx: Record<string, unknown>): string {
   const candidates = [ctx.commandSource, ctx.messageProvider, ctx.channelId, ctx.channel];
   for (const c of candidates) {
@@ -65,6 +70,31 @@ function getLivePluginConfig(api: OpenClawPluginApi, fallback: WhisperGateConfig
   return fallback;
 }
 
+function loadChannelPolicies(api: OpenClawPluginApi, config: WhisperGateConfig): Record<string, ChannelPolicy> {
+  const file = config.channelPoliciesFile;
+  if (!file) return {};
+
+  const resolved = api.resolvePath(file);
+  try {
+    const stat = fs.statSync(resolved);
+    const mtime = Number(stat.mtimeMs || 0);
+
+    if (resolved === channelPoliciesFilePath && mtime === channelPoliciesMtimeMs) {
+      return channelPoliciesCache;
+    }
+
+    const raw = fs.readFileSync(resolved, "utf8");
+    const parsed = JSON.parse(raw) as Record<string, ChannelPolicy>;
+    channelPoliciesCache = parsed && typeof parsed === "object" ? parsed : {};
+    channelPoliciesFilePath = resolved;
+    channelPoliciesMtimeMs = mtime;
+    return channelPoliciesCache;
+  } catch (err) {
+    api.logger.warn(`whispergate: failed loading channelPoliciesFile=${resolved}: ${String(err)}`);
+    return {};
+  }
+}
+
 function pickDefined(input: Record<string, unknown>) {
   const out: Record<string, unknown> = {};
   for (const [k, v] of Object.entries(input)) {
@@ -181,7 +211,8 @@ export default {
         const channelId = typeof c.channelId === "string" ? c.channelId : undefined;
 
         const live = getLivePluginConfig(api, baseConfig as WhisperGateConfig);
-        const decision = evaluateDecision({ config: live, channel, channelId, senderId, content });
+        const channelPolicies = loadChannelPolicies(api, live);
+        const decision = evaluateDecision({ config: live, channel, channelId, channelPolicies, senderId, content });
         sessionDecision.set(sessionKey, { decision, createdAt: Date.now() });
         pruneDecisionMap();
         api.logger.debug?.(