Codex Pro Max Slash Skills and Composer Menus

Highlights

• Adds global SQLite slash skills with a removable /plan-first system skill and a profile Skills manager.
• Lets the composer expand exact slash skills and browse / skill suggestions from the keyboard.
• Brings @ attachment mentions and slash suggestions onto the old compact full-width menu pattern with ArrowUp/ArrowDown, Enter, Tab, and Escape handling.
• Restores the popup fade-in motion timing used by the previous UI while keeping the current layout.
• Documents the new composer context flow and adds API plus slash insertion coverage.

Verification

• npm run build
• npm test
• git diff --check
• Browser smoke for /plan keyboard insertion and @image attachment suggestion insertion

Codex Pro Max SQL-Based Version

Release the SQL-backed Codex Pro Max Next system as the main project. The previous file-based implementation is preserved under old/. Includes setup.cmd, start.cmd, uninstall.cmd, backend session endpoints, SQLite persistence, rollout-based usage/thinking updates, and the migrated UI.