Fixes #183.

Problems

Three bugs in the React TUI slash-command flow, all reported in the same issue.

1. Trailing space on Tab-completion

App.tsx completed /exit to /exit (note the space), so hitting Enter right after Tab would submit /exit<space> with an empty arg instead of running /exit directly.

2. Cursor stuck after programmatic setInput

MultilineTextInput kept its cursorOffset across value prop changes and only clamped the cursor down via Math.min(prev, value.length). After Tab-completion (which grows the value), the cursor stayed at the old offset instead of moving to the end of the completed text. Subsequent keystrokes landed in the middle — e.g. typing X after Tab-completing /exit produced /eXxit. Same class of bug for history recall (↑), which also changes value externally.

3. /quit not registered

/quit is the other obvious word for "exit" and users were surprised when it didn't work.

Fixes

frontend/terminal/src/App.tsx

Drop the trailing space from the completion path. Users who want to pass an argument can type the space themselves.

frontend/terminal/src/components/PromptInput.tsx

Track the last internally-authored value via lastInternalValueRef. On each useEffect([value]), if the incoming value matches the ref, the change came from our own onChange and the cursor was already positioned correctly by the handler — do nothing. Otherwise the change is external (tab completion, history recall, esc-clear) and we snap the cursor to the end. Wrapped all internal onChange(nextValue) calls in a commitValue helper that updates the ref before delegating.

src/openharness/commands/registry.py

Added aliases: tuple[str, ...] = () to SlashCommand. CommandRegistry.register now installs each alias under its own key pointing at the same command object. help_text / list_commands dedupe via a separate _canonical_names list so aliases resolve via lookup without cluttering the listing.

Then: SlashCommand(\"exit\", ..., aliases=(\"quit\",)).

Testing

New Python unit tests in tests/test_commands/test_registry.py:

• test_quit_is_alias_for_exit — `/exit` and `/quit` resolve to the same SlashCommand object.
• test_help_and_list_do_not_duplicate_aliases — list_commands() has exactly one exit entry; `/quit` does not appear in `help_text()` output.

Both pass locally (python3.12 -m pytest tests/test_commands/test_registry.py::test_quit_is_alias_for_exit tests/test_commands/test_registry.py::test_help_and_list_do_not_duplicate_aliases). Rest of test_registry.py is unaffected by this change (one pre-existing failure in test_auth_feedback_and_project_context_commands was already failing on main because the test reads a real API key from the host environment; unrelated to this PR).

I don't have a node toolchain on this machine so I couldn't run the ink-based PromptInput.test.tsx harness, but the cursor fix is local to one component and the change is straightforward.

Before / After

Before:

• Type /, picker opens, Tab → /exit (with space), Enter → runs /exit with empty arg
• Type /, Tab → cursor stays at offset 1, typing X produces /Xxit (or similar garbled output)
• Type /quit, Enter → Unknown command: quit

After:

• Tab completes to /exit, Enter runs it cleanly
• Tab moves cursor to end, subsequent typing appends normally
• /quit resolves to the same handler as /exit