添加 Memory Gateway Agent skill及其 CLI 实现，支持用户资源管理和记忆操作

docs/superpowers/plans/2026-06-12-memory-gateway-agent-skill.md

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+# Memory Gateway Agent Skill Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Create a reusable AI-agent skill that safely operates the Memory Gateway API through a deterministic Python CLI.
+
+**Architecture:** Keep procedural guidance in `SKILL.md`, detailed endpoint schemas in `references/api.md`, and all HTTP/multipart behavior in one standard-library CLI. Read credentials from environment variables or explicit flags and never persist secrets in the skill.
+
+**Tech Stack:** Agent Skills format, Python 3 standard library, pytest, Memory Gateway HTTP API.
+
+---
+
+### Task 1: Scaffold the skill
+
+**Files:**
+- Create: `skill/memory-gateway-agent/SKILL.md`
+- Create: `skill/memory-gateway-agent/agents/openai.yaml`
+- Create: `skill/memory-gateway-agent/scripts/memory_gateway.py`
+- Create: `skill/memory-gateway-agent/references/api.md`
+
+- [x] Initialize the standard skill structure with `init_skill.py`.
+- [x] Remove generated placeholders and keep only required resources.
+
+### Task 2: Implement and test the CLI
+
+**Files:**
+- Create: `tests/test_memory_gateway_skill.py`
+- Modify: `skill/memory-gateway-agent/scripts/memory_gateway.py`
+
+- [x] Write failing tests for environment credentials, JSON requests, multipart uploads, and HTTP errors.
+- [x] Run the focused tests and confirm they fail for missing implementation.
+- [x] Implement the standard-library CLI with commands for health, users, resources, search, add/flush, override, and delete.
+- [x] Run the focused tests and confirm they pass.
+
+### Task 3: Author and validate the skill
+
+**Files:**
+- Modify: `skill/memory-gateway-agent/SKILL.md`
+- Modify: `skill/memory-gateway-agent/references/api.md`
+- Modify: `skill/memory-gateway-agent/agents/openai.yaml`
+
+- [x] Document the agent workflow, authentication rules, ownership checks, and safe handling of secrets.
+- [x] Document endpoint parameters and CLI examples in the API reference.
+- [x] Generate UI metadata with the official skill-creator script.
+- [x] Run `quick_validate.py`, CLI `--help`, focused tests, and the full project test suite.