feat: add cache-ttl pruning mode

src/config/config.pruning-defaults.test.ts

@@ -4,7 +4,7 @@ import { describe, expect, it, vi } from "vitest";
 import { withTempHome } from "./test-helpers.js";
 
 describe("config pruning defaults", () => {
-  it("defaults contextPruning mode to adaptive", async () => {
+  it("does not enable contextPruning by default", async () => {
     await withTempHome(async (home) => {
       const configDir = path.join(home, ".clawdbot");
       await fs.mkdir(configDir, { recursive: true });
@@ -18,7 +18,7 @@ describe("config pruning defaults", () => {
       const { loadConfig } = await import("./config.js");
       const cfg = loadConfig();
 
-      expect(cfg.agents?.defaults?.contextPruning?.mode).toBe("adaptive");
+      expect(cfg.agents?.defaults?.contextPruning?.mode).toBeUndefined();
     });
   });
 

src/config/defaults.ts

@@ -157,24 +157,7 @@ export function applyLoggingDefaults(cfg: ClawdbotConfig): ClawdbotConfig {
 }
 
 export function applyContextPruningDefaults(cfg: ClawdbotConfig): ClawdbotConfig {
-  const defaults = cfg.agents?.defaults;
-  if (!defaults) return cfg;
-  const contextPruning = defaults?.contextPruning;
-  if (contextPruning?.mode) return cfg;
-
-  return {
-    ...cfg,
-    agents: {
-      ...cfg.agents,
-      defaults: {
-        ...defaults,
-        contextPruning: {
-          ...contextPruning,
-          mode: "adaptive",
-        },
-      },
-    },
-  };
+  return cfg;
 }
 
 export function applyCompactionDefaults(cfg: ClawdbotConfig): ClawdbotConfig {

src/config/types.agent-defaults.ts

@@ -23,7 +23,9 @@ export type AgentModelListConfig = {
 };
 
 export type AgentContextPruningConfig = {
-  mode?: "off" | "adaptive" | "aggressive";
+  mode?: "off" | "cache-ttl";
+  /** TTL to consider cache expired (duration string, default unit: minutes). */
+  ttl?: string;
   keepLastAssistants?: number;
   softTrimRatio?: number;
   hardClearRatio?: number;

src/config/zod-schema.agent-defaults.ts

@@ -54,9 +54,8 @@ export const AgentDefaultsSchema = z
     memorySearch: MemorySearchSchema,
     contextPruning: z
       .object({
-        mode: z
-          .union([z.literal("off"), z.literal("adaptive"), z.literal("aggressive")])
-          .optional(),
+        mode: z.union([z.literal("off"), z.literal("cache-ttl")]).optional(),
+        ttl: z.string().optional(),
         keepLastAssistants: z.number().int().nonnegative().optional(),
         softTrimRatio: z.number().min(0).max(1).optional(),
         hardClearRatio: z.number().min(0).max(1).optional(),