AIHub Expose String Selection

When you want the person on the other end of an AIHub workflow to pick from a fixed list instead of typing freeform, this is the node: AIHubExposeStringSelection. It's the dropdown of the otavanopisto ComfyUI-aihub-workflow-exposer pack, and the mental model is dead simple - you give it a newline-separated list of options, the client renders a dropdown, and the node outputs whichever string the user chose.

The part people miss is the two-list design, which is actually the feature that makes this node pleasant to use. You're not limited to one list.

The inputs that matter

• options - the actual values, one per line (default option1\noption2\noption3). These are what the node outputs. Keep them machine-friendly: ids, filenames, enum-ish values.
• options_label - the pretty versions the user sees, one per line. The source requires the count to match options. So you can show "Portrait 1024×1024" while the node outputs 1024,1024. This is the workflow you get for free in a client UI that otherwise has zero styling knobs.
• value - the currently selected option; must be present in the options list or the source raises ValueError ("The value given is not in the list of options"). That's a real failure mode when you copy-paste a workflow and the default got out of sync with a list you edited.
• id / label / tooltip / advanced / index - standard expose fields; id unique per workflow.

Output is a single STRING, and the author's README shows the natural next hop: pair it with the pack's conversion utils. A resolution selector (landscape / portrait) feeding AIHubUtilsStrToVector to get 1920,1080 or 1080,1920, or feeding AIHubUtilsStrToFloat for a numeric setting. Because the output is just a string, it also drops straight into any text input you've got.

Gotchas worth writing down

• Options are split on newlines and stripped, so blank lines are ignored - but a trailing blank line will still trip the "value not in list" check if it appears inside an option you typed. Keep the list clean.
• If you change options after a workflow ships, update value to match. That single mismatch is the most common way this node errors.
• No comma-separated shortcut: it's one option per line, always.

Install is the pack standard - no requirements, nothing to download:

cd ComfyUI/custom_nodes
git clone https://github.com/otavanopisto/ComfyUI-aihub-workflow-exposer

Restart ComfyUI. Honest framing: this node is genuinely the friendliest thing in the pack - it's the one place a non-technical user gets a real, safe, impossible-to-typo control. If you're building an AIHub workflow for an editor, string selections should be your default "let the user pick" control, not free text.