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issue #44：Pi 像 opencode 一样开放，skill:// 能直接用，已验证可手动使用， 希望原生支持。上游 obra/superpowers 在 v6.0.0 已用扩展模型原生集成 Pi， 本提交把同样的集成方式落到本 fork。 Pi 走扩展模型，通过 package.json 的 pi 字段声明，直接指向仓库现有 skills/，不复制 skill、无运行时依赖。扩展内容中立——读取 fork 现有的 中文 using-superpowers/SKILL.md 自动注入，故扩展代码逐字节照搬上游。 - .pi/extensions/superpowers.ts：注册 resources_discover / session_start / session_compact / agent_end / context 生命周期钩子，在会话注入 using-superpowers bootstrap + Pi 工具映射（带去重标记、插在 compaction summary 之后） - package.json：加 pi.skills=["./skills"] + pi.extensions + pi-package keyword；.pi/extensions/ 加入 files（npm 发布需含扩展） - skills/using-superpowers/references/pi-tools.md：Pi 工具映射参考 - docs/README.pi.md：中文安装/原理/工具映射/验证指南；README.md 工具列表加链接 - tests/pi/：上游扩展行为测试（适配 fork：name=superpowers-zh）+ 运行包装 验证：bash tests/pi/run-tests.sh 6/6 通过 exit 0（校验 pi 包配置、生命周期 钩子无 pre-compaction 注入、resources_discover 贡献 skills 目录、session_start 注入 You-have-superpowers + Pi-tool-mapping、pi-tools 参考存在）；package.json 合法；scripts/audit.sh 静态 0 FAIL；README→docs/README.pi.md 链接可解析。 注：扩展是 TS（仅 import type，运行时无类型依赖），Node 22.6–23.5 需 --experimental-strip-types（run-tests.sh 已带），23.6+ 默认支持。 Pi 内实际 skill 触发需在 Pi 内验证（与本 fork 其它 harness 同样限制）。
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Pi Tool Mapping
Skills speak in actions ("dispatch a subagent", "create a todo", "read a file"). On Pi these resolve to the tools below.
| Action skills request | Pi equivalent |
|---|---|
| Invoke a skill | Pi native skills: load the relevant SKILL.md with read, or let the human use /skill:name |
| Read a file | read |
| Create a file | write |
| Edit a file | edit |
| Run a shell command | bash |
| Search file contents | grep when active; otherwise bash with rg/grep |
| Find files by name | find or bash with shell globs |
| List files and subdirectories | ls when active; otherwise bash with ls |
Dispatch a subagent (Subagent (general-purpose): template) |
Use an installed subagent tool such as subagent from pi-subagents if available |
| Task tracking ("create a todo", "mark complete") | Use an installed todo/task tool if available, otherwise track tasks in the plan or TODO.md |
Skills
Pi discovers skills from configured skill directories and installed Pi packages. A Superpowers Pi package should expose skills/ through its pi.skills manifest entry. Pi does not expose Claude Code's Skill tool, but the agent should still follow the Superpowers rule: when a skill applies, load and follow it before responding.
Subagents
Pi core does not ship a standard subagent tool. The pi-subagents package is a strong optional companion and provides a subagent tool with single-agent, chain, parallel, async, forked-context, and resume/status workflows. If no subagent tool is available, do not fabricate Task calls; execute sequentially in the current session or explain that the optional subagent capability is not installed.
Task lists
Pi core does not ship a standard task-list tool. If a todo/task extension is installed, use its documented tool. Otherwise use Superpowers plan files, checklists in Markdown, or a repo-local TODO.md for task tracking. Older Superpowers docs may refer to TodoWrite; treat that as the task-tracking action above.