docs: add skill manager documentation

docs/CURSOR.md

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+# Cursor Manual Install
+
+## Skill Roots
+
+Cursor supports repo-local and global skills:
+
+```bash
+.cursor/skills/<skill-name>/
+~/.cursor/skills/<skill-name>/
+```
+
+Manual repo-local install example:
+
+```bash
+mkdir -p .cursor/skills/create-plan
+cp -R skills/create-plan/cursor/* .cursor/skills/create-plan/
+```
+
+Global install example:
+
+```bash
+mkdir -p ~/.cursor/skills/create-plan
+cp -R skills/create-plan/cursor/* ~/.cursor/skills/create-plan/
+```
+
+Cursor variants exist for `atlassian`, `create-plan`, `do-task`, and `implement-plan`. `web-automation` currently has no Cursor variant.
+
+## Reviewer Runtime
+
+Repo-local:
+
+```bash
+mkdir -p .cursor/skills/reviewer-runtime
+cp skills/reviewer-runtime/run-review.sh .cursor/skills/reviewer-runtime/
+cp skills/reviewer-runtime/notify-telegram.sh .cursor/skills/reviewer-runtime/
+chmod +x .cursor/skills/reviewer-runtime/*.sh
+```
+
+Global uses `~/.cursor/skills/reviewer-runtime/` instead.
+
+## Superpowers
+
+Cursor variants expect the nested Superpowers layout:
+
+```bash
+.cursor/skills/superpowers/skills/<superpower>/SKILL.md
+~/.cursor/skills/superpowers/skills/<superpower>/SKILL.md
+```
+
+Recommended symlink:
+
+```bash
+mkdir -p .cursor/skills/superpowers
+ln -s /absolute/path/to/obra/superpowers/skills .cursor/skills/superpowers/skills
+```
+
+## Cursor Reviewer Notes
+
+Cursor reviewer calls use JSON output and require `jq` where the skill variant parses reviewer responses:
+
+```bash
+cursor-agent --version
+jq --version
+```
+
+Reviewer calls must use `--mode=ask --trust --output-format json`, never write-capable modes.
+
+## Verify
+
+Repo-local scope:
+
+```bash
+cursor-agent --version
+test -f .cursor/skills/create-plan/SKILL.md
+test -f .cursor/skills/superpowers/skills/brainstorming/SKILL.md
+```
+
+Global scope:
+
+```bash
+cursor-agent --version
+test -f ~/.cursor/skills/create-plan/SKILL.md
+test -f ~/.cursor/skills/superpowers/skills/brainstorming/SKILL.md
+```