feat(agent): 运行时从 pi-agent-core 0.99.2 迁到 pi-durable 1.1.0 + pi-ai 1.1.0

- PiAgentRuntime 改用 pi-durable Harness:每个 run 一个 JSONL 存储目录 sessionDir/<runId>/ + root 对话;
  系统提示 / 能力工具 / 白名单与预算钩子装在每次运行自己的扩展里;watchEvents 翻译成 AgentRunEvent
- 挂起(工具内 close)立即封口,调用保持未完成,重开后 resume 重放;replayGate 用调用级 memo
- 旧格式 <runId>.jsonl 打开时抛 LegacySessionError;skills 加载与 <skill> 块格式内置(源自 pi-agent-core,MIT)
- tool_call_end 新增可选 durationMs;用量取 pi.usage 合计(整段会话总量)
- Azure provider 改名 azure,迁移 0093 改存量;移除 pi-agent-core,锁 pi-durable/pi-ai/chord 1.1.0
- 文档:ADR-003、pi-providers、runbook、agent README、CHANGELOG

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

packages/agent/src/prompt/skills.ts

@@ -1,36 +1,57 @@
+import { readdir, readFile } from "node:fs/promises";
+import { join } from "node:path";
 import { fileURLToPath } from "node:url";
-import { BACKGROUND_CONTEXT, formatSkillInvocation, loadSkills, type Skill } from "@earendil-works/pi-agent-core";
-import { NodeExecutionEnv } from "@earendil-works/pi-agent-core/harness/env/nodejs";
 import { CAPABILITY_CATALOG } from "@umt/contracts";
 import { parse as parseYaml } from "yaml";
 import type { PromptSection, SessionKind, SkillDoc } from "./types.ts";
 
-// Skill(AG-5):packages/agent/skills/<name>/SKILL.md。发现、解析与校验用 Pi harness 的 loadSkills
-// (agentskills.io 格式:frontmatter name / description + 正文;name 必须等于目录名)。
+// Skill(AG-5):packages/agent/skills/<name>/SKILL.md(agentskills.io 格式:frontmatter name / description + 正文;
+// name 必须等于目录名)。
 //
 // Pi 的模型侧用法是把 <available_skills> 索引放进系统提示,由模型用文件读取工具自己读 SKILL.md;
 // 我们的智能体没有(也不该有)文件读取工具,所以改成服务端按意图选:frontmatter 的 triggers 命中目标或追加消息时,
-// 首轮把正文注入系统提示的「Skill」层,后续消息用 Pi 的 formatSkillInvocation 附在用户消息前(见 runner)。
+// 首轮把正文注入系统提示的「Skill」层,后续消息用 Pi 的 skill 块格式附在用户消息前(见 runner)。
 // 本项目的 frontmatter 扩展:title(中文名)、triggers(正则)、capabilities(用到的能力)、sessions(适用会话类型)。
+//
+// 发现 / 解析 / 校验与 skill 块格式取自 pi-agent-core 0.99.2 的 harness/skills.ts(MIT,© Earendil Works);
+// pi 1.x 把 harness 移到 pi-durable 后不再提供 skills,这里只保留本项目用到的部分:
+// 一层目录下的 <name>/SKILL.md,不读 .gitignore、不收根目录的散 .md、不跟随符号链接。
 
 /** 仓库内的 Skill 目录;deno compile 用 --include 嵌入(apps/server/deno.json 的 compile 任务) */
 export const SKILLS_DIR = fileURLToPath(new URL("../../skills", import.meta.url));
 
 const DEFAULT_SESSIONS: SessionKind[] = ["chat", "patrol", "investigate", "child"];
 const SESSION_KINDS = new Set<SessionKind>(["chat", "patrol", "investigate", "child", "vision"]);
+const MAX_NAME_LENGTH = 64;
+const MAX_DESCRIPTION_LENGTH = 1024;
 
 export interface SkillLoadResult {
   skills: SkillDoc[];
-  /** 格式问题(Pi 的诊断 + 扩展字段校验);测试要求为空 */
+  /** 格式问题(Pi 同款校验 + 扩展字段校验);测试要求为空 */
   diagnostics: string[];
 }
 
-function frontmatter(raw: string): Record<string, unknown> {
+/** frontmatter + 正文(与 Pi 的 parseFrontmatter 一致:没有 frontmatter 时整篇是正文) */
+function parseSkillFile(raw: string): { frontmatter: Record<string, unknown>; body: string } {
   const text = raw.replace(/\r\n?/g, "\n");
-  if (!text.startsWith("---")) return {};
+  if (!text.startsWith("---")) return { frontmatter: {}, body: text };
   const end = text.indexOf("\n---", 3);
-  if (end < 0) return {};
-  return (parseYaml(text.slice(4, end)) ?? {}) as Record<string, unknown>;
+  if (end < 0) return { frontmatter: {}, body: text };
+  return {
+    frontmatter: (parseYaml(text.slice(4, end)) ?? {}) as Record<string, unknown>,
+    body: text.slice(end + 4).trim(),
+  };
+}
+
+/** Pi 的 name 规则:等于目录名、≤64、只含小写字母数字与连字符、不以连字符开头结尾、不连续 */
+function validateName(name: string, dirName: string): string[] {
+  const errors: string[] = [];
+  if (name !== dirName) errors.push(`name "${name}" 与目录名 "${dirName}" 不一致`);
+  if (name.length > MAX_NAME_LENGTH) errors.push(`name 超过 ${MAX_NAME_LENGTH} 个字符`);
+  if (!/^[a-z0-9-]+$/.test(name)) errors.push("name 只能用小写字母、数字和连字符");
+  if (name.startsWith("-") || name.endsWith("-")) errors.push("name 不能以连字符开头或结尾");
+  if (name.includes("--")) errors.push("name 不能有连续连字符");
+  return errors;
 }
 
 const strings = (v: unknown): string[] =>
@@ -38,25 +59,46 @@ const strings = (v: unknown): string[] =>
 
 /** 读目录下全部 Skill;失败的项进 diagnostics,不抛错(运行时缺 Skill 只少一层提示,不影响会话) */
 export async function loadSkillDocs(dir: string = SKILLS_DIR): Promise<SkillLoadResult> {
-  const env = new NodeExecutionEnv({ cwd: dir });
   const diagnostics: string[] = [];
-  let skills: Skill[] = [];
+  let entries: { name: string; isDirectory(): boolean }[];
   try {
-    const r = await loadSkills(env, dir, BACKGROUND_CONTEXT);
-    skills = r.skills;
-    for (const d of r.diagnostics) diagnostics.push(`${d.path}: ${d.message}`);
+    entries = await readdir(dir, { withFileTypes: true });
   } catch (err) {
     return { skills: [], diagnostics: [`${dir}: ${(err as Error).message}`] };
   }
   const out: SkillDoc[] = [];
-  for (const s of skills) {
-    const raw = await env.readTextFile(s.filePath, BACKGROUND_CONTEXT);
-    const fm = raw.ok ? frontmatter(raw.value) : {};
+  for (const entry of entries) {
+    if (!entry.isDirectory() || entry.name.startsWith(".") || entry.name === "node_modules") continue;
+    const filePath = join(dir, entry.name, "SKILL.md");
+    const where = `${entry.name}/SKILL.md`;
+    let raw: string;
+    try {
+      raw = await readFile(filePath, "utf8");
+    } catch (err) {
+      if ((err as NodeJS.ErrnoException).code !== "ENOENT") diagnostics.push(`${where}: ${(err as Error).message}`);
+      continue;
+    }
+    let fm: Record<string, unknown>;
+    let body: string;
+    try {
+      ({ frontmatter: fm, body } = parseSkillFile(raw));
+    } catch (err) {
+      diagnostics.push(`${where}: frontmatter 解析失败：${(err as Error).message}`);
+      continue;
+    }
+    const description = typeof fm.description === "string" ? fm.description : "";
+    if (!description.trim()) {
+      diagnostics.push(`${where}: 缺少 description`);
+      continue;
+    }
+    if (description.length > MAX_DESCRIPTION_LENGTH)
+      diagnostics.push(`${where}: description 超过 ${MAX_DESCRIPTION_LENGTH} 个字符`);
+    const name = typeof fm.name === "string" && fm.name ? fm.name : entry.name;
+    for (const e of validateName(name, entry.name)) diagnostics.push(`${where}: ${e}`);
     const triggers = strings(fm.triggers);
     const capabilities = strings(fm.capabilities);
     const sessions = strings(fm.sessions) as SessionKind[];
-    const title = typeof fm.title === "string" ? fm.title : s.name;
-    const where = `${s.name}/SKILL.md`;
+    const title = typeof fm.title === "string" ? fm.title : name;
     if (triggers.length === 0) diagnostics.push(`${where}: 缺少 triggers`);
     for (const t of triggers) {
       try {
@@ -68,14 +110,14 @@ export async function loadSkillDocs(dir: string = SKILLS_DIR): Promise<SkillLoad
     for (const c of capabilities) if (!(c in CAPABILITY_CATALOG)) diagnostics.push(`${where}: 未知能力 ${c}`);
     for (const k of sessions) if (!SESSION_KINDS.has(k)) diagnostics.push(`${where}: 未知会话类型 ${k}`);
     out.push({
-      name: s.name,
+      name,
       title,
-      description: s.description,
+      description,
       triggers,
       capabilities,
       sessions: sessions.length ? sessions : DEFAULT_SESSIONS,
-      content: s.content,
-      filePath: s.filePath,
+      content: body,
+      filePath,
     });
   }
   out.sort((a, b) => a.name.localeCompare(b.name));
@@ -153,16 +195,17 @@ export function skillsLayer(loaded: readonly SkillDoc[], available: readonly Ski
   return { layer: "skills", title: "Skill", lines };
 }
 
+/** Pi 的 skill 调用块格式(pi-agent-core 0.99.2 formatSkillInvocation) */
+function formatSkillInvocation(skill: { name: string; filePath: string; content: string }): string {
+  const dir = skill.filePath.replace(/[\\/]+$/, "").replace(/[\\/][^\\/]*$/, "") || "/";
+  return `<skill name="${skill.name}" location="${skill.filePath}">\nReferences are relative to ${dir}.\n\n${skill.content}\n</skill>`;
+}
+
 /** 追加消息命中新 Skill 时,用 Pi 的格式把 Skill 附在消息前(模型当作本条消息的做事说明) */
 export function withSkillInvocation(skills: readonly SkillDoc[], text: string): string {
   if (skills.length === 0) return text;
   const blocks = skills.map((s) =>
-    formatSkillInvocation({
-      name: s.name,
-      description: s.description,
-      content: s.content,
-      filePath: `skills/${s.name}/SKILL.md`,
-    }),
+    formatSkillInvocation({ name: s.name, content: s.content, filePath: `skills/${s.name}/SKILL.md` }),
   );
   return `${blocks.join("\n\n")}\n\n${text}`;
 }

packages/agent/src/prompt/types.ts

@@ -92,7 +92,7 @@ export interface LayeredPromptInput {
   constraints?: readonly string[];
 }
 
-/** 一个 Skill(Pi harness Skill + 本项目的 frontmatter 扩展) */
+/** 一个 Skill(Pi 的 agentskills.io 格式 + 本项目的 frontmatter 扩展) */
 export interface SkillDoc {
   /** 目录名,小写字母 / 数字 / 连字符 */
   name: string;