opencode.nvim required the OpenCode V1 CLI and its `--port` HTTP API,
which v2 removed, so the config pinned a separate V1 binary and carried
a binary split plus OPENCODE_DISABLE_AUTOUPDATE. Swap it for
carlos-algms/agentic.nvim, an ACP client that drives `opencode acp`
(v2) straight from PATH — no pinning, no second binary.
- provider defaults to opencode-acp
- new sessions start in the git worktree root (session_cwd)
- keep the <leader>a* layout, extended with session/provider/diagnostics
- drop the go/goo operators and <S-C-u>/<S-C-d> (no TUI/Vim-operator API)
- update README and lazy-lock accordingly
sam_oneal