Commit 50fa67d

**Status: Already works in web app.** Copy buttons exist on all text/code/bash parts. `-webkit-user-select: text` enables click-drag selection. This is primarily a TUI issue (terminal text selection). **No web app changes needed.**

**Status: Already exists.** The config supports:

- `instructions` field for additional instruction files

- `.opencode/agents/` folder for custom agent prompts

- Agent `prompt` field in config

**No changes needed — just needs documentation.**

**Status: Actionable.** Current defaults are all "ask" which is safe, but the issue wants:

- `external_directory: deny` by default (prevent file access outside project)

- Better logging of what tools are doing

**Implementable: change default permission for external_directory.**

**Status: Large feature.** Needs:

- New config schema for fallback chains

- Provider selection logic in session processor

- Retry with different model on failure

**Deferred — too large for this session.**