feat(condense): tune default pruning policy

AGENTS.md

@@ -90,7 +90,7 @@
 - Exa MCP 使用托管 Streamable HTTP 端点和 `eager` lifecycle；`EXA_API_KEY` 通过 `x-api-key` 请求头发送，不得放入 URL、仓库文件或日志。所有在线搜索工具统一采用“来源名 + 原始语义工具名”的命名形式，例如 `tavily_web_search`、`exa_web_search`、`keenable_search`。Exa 高级搜索必须显式约束结果数量和文本长度；Tavily 输出默认控制 `max_results` 且非必要不请求 raw content；Keenable 优先利用中文、站点和日期筛选能力。
 - 搜索 key 默认保存在 `${XDG_CONFIG_HOME:-$HOME/.config}/my-pi/search.env`，文件必须为 `600` 且不得提交；`search_config.sh` 只输出配置状态，禁止回显 key。
 - `pi-context-view` 只观察上下文占用，不参与压缩策略。
-- `pi-condense` 负责压缩已经进入会话的历史工具结果，与 Context Mode 的输入隔离职责互补；`extensions/condense.ts` 只在 `settings.json` 尚无 `contextPrune.enabled` 时写入 `true`，必须保留用户显式设置的 `false`，配置无效时不得覆盖原文件。其他参数沿用上游默认，包括 `agent-message` 触发模式和 skill 路径保护。
+- `pi-condense` 负责压缩已经进入会话的历史工具结果，与 Context Mode 的输入隔离职责互补；`extensions/condense.ts` 只为 `settings.json` 的 `contextPrune` 补入缺失的组合包默认字段，必须保留全部用户显式值（包括 `enabled: false`），配置无效时不得覆盖原文件，配置完整时不得重复改写。组合包默认开启，使用 `agent-message` 触发、`turn` 批处理、73.5% 总预算与 4% 单轮增量触发，摘要模型和 thinking 均为 `default`，空闲/总超时为 90 秒/5 分钟，`quietOversizedSkips` 为 `false`；未显式部署的参数继续沿用上游默认，包括 skill 路径保护。
 - Codex fast mode 只为符合条件的 `openai-codex-responses` 请求设置 priority service tier。`/fast-mode on|off` 同时更新当前分支记录与 Pi agent 目录中的 owner-only 全局默认值；新会话继承全局值，已有分支记录优先，配置缺失或无效时回退为关闭。
 - Kitty 通知只在 TUI 模式的 `agent_settled` 后发送；自动重试、自动 compaction 和 follow-up 期间不得提前通知或重置总耗时。默认 `o=always`、`a=focus`，每个 Pi Session 使用独立稳定 ID，标题和正文必须 Base64 编码。
 - `/notify on|off` 只覆盖当前 Session；持久默认来自 `PI_NOTIFY_*` 环境变量。`PI_NOTIFY_MESSAGE_SOURCE=none` 必须继续提供不泄露回复正文的隐私模式，非 TUI 模式不得写入 OSC 序列。

README.md

@@ -361,7 +361,9 @@ macOS 通知中心。Kitty 位于 tmux 内时需要 `set -g allow-passthrough al
 
 ### Pi Condense
 
-组合包首次加载时会在 `contextPrune.enabled` 尚未配置的情况下写入 `true`，因此 `pi-condense` 默认开启；用户通过 `/pruner off` 写入的显式 `false` 会被保留，后续启动或升级不会重新覆盖。它使用上游默认的 `agent-message` 触发模式：同一用户任务中的多轮工具调用会在最终文本回复后统一触发整理，默认仍按每个 assistant turn 分别生成摘要；后续上下文只保留摘要和 `t1`、`t2` 等引用。需要原文时，模型可调用 `context_tree_query({ toolCallIds: ["t1"] })` 恢复。
+组合包加载时会只为 `contextPrune` 中缺失的字段补入默认策略，任何用户显式值（包括 `/pruner off` 写入的 `enabled: false`）均优先且不会被覆盖。默认使用 `agent-message` 触发模式和 `turn` 批处理；正常上下文达到窗口的 73.5% 时中途整理，单轮增长达到窗口的 4% 时提前整理。对于 272K 上下文模型，两者约为 200K 和 11K tokens；其他模型按各自窗口比例计算。摘要使用当前默认模型和默认 thinking，连续 90 秒无输出才判定空闲超时，每次最长运行 5 分钟，并保留未压缩或摘要过大等跳过提示。
+
+同一用户任务中的多轮工具调用通常在最终文本回复后触发整理，预算触发器则可在长任务中提前处理；后续上下文只保留摘要和 `t1`、`t2` 等引用。需要原文时，模型可调用 `context_tree_query({ toolCallIds: ["t1"] })` 恢复。
 
 常用命令：`/pruner status` 查看状态，`/pruner settings` 调整配置，`/pruner now` 立即处理待总结批次，`/pruner tree` 浏览已归档调用，`/pruner stats` 查看累计成本和节省，`/pruner off` 关闭。配置保存在 Pi agent 目录 `settings.json` 的 `contextPrune` 字段。建议保留默认的 skill 路径保护，并把必须逐字复用输出的工具加入 `protectedTools`。
 

extensions/condense-config.ts

@@ -3,12 +3,25 @@ import { dirname, join } from "node:path";
 
 export type CondenseDefaultResult = "updated" | "unchanged" | "skipped-invalid";
 
+const CONDENSE_BUNDLE_DEFAULTS = {
+	enabled: true,
+	pruneOn: "agent-message",
+	batchingMode: "turn",
+	autoBudgetThreshold: 0.735,
+	budgetTurnDelta: 0.04,
+	summarizerModel: "default",
+	summarizerThinking: "default",
+	summarizerIdleTimeoutMs: 90_000,
+	summarizerMaxTimeoutMs: 300_000,
+	quietOversizedSkips: false,
+} as const;
+
 function isObject(value: unknown): value is Record<string, unknown> {
 	return value !== null && typeof value === "object" && !Array.isArray(value);
 }
 
-/** Enable pi-condense only when the user has not already chosen an enabled state. */
-export function ensureCondenseEnabledDefault(agentDir: string): CondenseDefaultResult {
+/** Fill missing pi-condense settings with bundle defaults while preserving every explicit user choice. */
+export function ensureCondenseDefaults(agentDir: string): CondenseDefaultResult {
 	const targetPath = join(agentDir, "settings.json");
 	let settings: Record<string, unknown> = {};
 
@@ -22,9 +35,12 @@ export function ensureCondenseEnabledDefault(agentDir: string): CondenseDefaultR
 
 	const existing = settings.contextPrune;
 	if (existing !== undefined && !isObject(existing)) return "skipped-invalid";
-	if (isObject(existing) && Object.hasOwn(existing, "enabled")) return "unchanged";
 
-	settings.contextPrune = { ...(existing ?? {}), enabled: true };
+	const contextPrune = existing ?? {};
+	const alreadyComplete = Object.keys(CONDENSE_BUNDLE_DEFAULTS).every((key) => Object.hasOwn(contextPrune, key));
+	if (alreadyComplete) return "unchanged";
+
+	settings.contextPrune = { ...CONDENSE_BUNDLE_DEFAULTS, ...contextPrune };
 	mkdirSync(dirname(targetPath), { recursive: true });
 	const temporaryPath = `${targetPath}.my-pi.tmp`;
 	writeFileSync(temporaryPath, `${JSON.stringify(settings, null, 2)}\n`, "utf8");

extensions/condense.ts

@@ -1,9 +1,9 @@
 import { getAgentDir, type ExtensionAPI } from "@earendil-works/pi-coding-agent";
-import { ensureCondenseEnabledDefault } from "./condense-config.ts";
+import { ensureCondenseDefaults } from "./condense-config.ts";
 
 /** Apply the bundle default before pi-condense reads settings on session_start. */
 export default async function bundledCondenseExtension(pi: ExtensionAPI): Promise<void> {
-	const result = ensureCondenseEnabledDefault(getAgentDir());
+	const result = ensureCondenseDefaults(getAgentDir());
 	if (result === "skipped-invalid") {
 		console.warn("my-pi: skipped the pi-condense default because settings.json or contextPrune is invalid");
 	}

tests/condense-config.test.ts

@@ -4,7 +4,20 @@ import { tmpdir } from "node:os";
 import { join } from "node:path";
 import test from "node:test";
 
-import { ensureCondenseEnabledDefault } from "../extensions/condense-config.ts";
+import { ensureCondenseDefaults } from "../extensions/condense-config.ts";
+
+const EXPECTED_DEFAULTS = {
+	enabled: true,
+	pruneOn: "agent-message",
+	batchingMode: "turn",
+	autoBudgetThreshold: 0.735,
+	budgetTurnDelta: 0.04,
+	summarizerModel: "default",
+	summarizerThinking: "default",
+	summarizerIdleTimeoutMs: 90_000,
+	summarizerMaxTimeoutMs: 300_000,
+	quietOversizedSkips: false,
+};
 
 async function withAgentDir(run: (agentDir: string) => Promise<void>): Promise<void> {
 	const agentDir = await mkdtemp(join(tmpdir(), "my-pi-condense-"));
@@ -15,42 +28,71 @@ async function withAgentDir(run: (agentDir: string) => Promise<void>): Promise<v
 	}
 }
 
-test("pi-condense defaults to enabled when contextPrune is absent", async () => {
+test("pi-condense writes the complete bundle defaults when contextPrune is absent", async () => {
 	await withAgentDir(async (agentDir) => {
-		assert.equal(ensureCondenseEnabledDefault(agentDir), "updated");
+		assert.equal(ensureCondenseDefaults(agentDir), "updated");
 		assert.deepEqual(JSON.parse(await readFile(join(agentDir, "settings.json"), "utf8")), {
-			contextPrune: { enabled: true },
+			contextPrune: EXPECTED_DEFAULTS,
 		});
 	});
 });
 
-test("pi-condense default preserves existing settings and contextPrune fields", async () => {
+test("pi-condense fills only missing defaults and preserves unrelated settings", async () => {
 	await withAgentDir(async (agentDir) => {
 		const path = join(agentDir, "settings.json");
-		await writeFile(path, JSON.stringify({ theme: "dark", contextPrune: { minBatchChars: 4000 } }), "utf8");
-		assert.equal(ensureCondenseEnabledDefault(agentDir), "updated");
+		await writeFile(
+			path,
+			JSON.stringify({ theme: "dark", contextPrune: { minBatchChars: 4000, budgetTurnDelta: 0.03 } }),
+			"utf8",
+		);
+		assert.equal(ensureCondenseDefaults(agentDir), "updated");
 		assert.deepEqual(JSON.parse(await readFile(path, "utf8")), {
 			theme: "dark",
-			contextPrune: { minBatchChars: 4000, enabled: true },
+			contextPrune: { ...EXPECTED_DEFAULTS, minBatchChars: 4000, budgetTurnDelta: 0.03 },
 		});
 	});
 });
 
-test("pi-condense default respects an explicit enabled choice", async () => {
+test("pi-condense preserves an explicit disabled choice while filling other defaults", async () => {
 	await withAgentDir(async (agentDir) => {
 		const path = join(agentDir, "settings.json");
-		const original = `${JSON.stringify({ contextPrune: { enabled: false } }, null, 2)}\n`;
+		await writeFile(path, JSON.stringify({ contextPrune: { enabled: false } }), "utf8");
+		assert.equal(ensureCondenseDefaults(agentDir), "updated");
+		assert.deepEqual(JSON.parse(await readFile(path, "utf8")), {
+			contextPrune: { ...EXPECTED_DEFAULTS, enabled: false },
+		});
+	});
+});
+
+test("pi-condense does not rewrite a complete explicit configuration", async () => {
+	await withAgentDir(async (agentDir) => {
+		const path = join(agentDir, "settings.json");
+		const original = `${JSON.stringify(
+			{ contextPrune: { ...EXPECTED_DEFAULTS, enabled: false, quietOversizedSkips: true } },
+			null,
+			2,
+		)}\n`;
 		await writeFile(path, original, "utf8");
-		assert.equal(ensureCondenseEnabledDefault(agentDir), "unchanged");
+		assert.equal(ensureCondenseDefaults(agentDir), "unchanged");
 		assert.equal(await readFile(path, "utf8"), original);
 	});
 });
 
-test("pi-condense default does not overwrite malformed settings", async () => {
+test("pi-condense defaults do not overwrite malformed settings", async () => {
 	await withAgentDir(async (agentDir) => {
 		const path = join(agentDir, "settings.json");
 		await writeFile(path, "{not-json", "utf8");
-		assert.equal(ensureCondenseEnabledDefault(agentDir), "skipped-invalid");
+		assert.equal(ensureCondenseDefaults(agentDir), "skipped-invalid");
 		assert.equal(await readFile(path, "utf8"), "{not-json");
 	});
 });
+
+test("pi-condense defaults reject a non-object contextPrune value", async () => {
+	await withAgentDir(async (agentDir) => {
+		const path = join(agentDir, "settings.json");
+		const original = `${JSON.stringify({ contextPrune: false }, null, 2)}\n`;
+		await writeFile(path, original, "utf8");
+		assert.equal(ensureCondenseDefaults(agentDir), "skipped-invalid");
+		assert.equal(await readFile(path, "utf8"), original);
+	});
+});