DESIGN: LLM builder assistant (Phase 3)

[pechhe]

Parent

PRD #45 — Chassis Actions (Phase 3)

Type

HITL — design pass required before this is agent-ready. Not labelled ready-for-agent.

What this is

The LLM builder assistant: the user describes a button (or, later, a layout) in plain language and their own configured model generates the Chassis Action / Composer Layout config, which is validated and previewed before saving. Lets users build tools without learning the schema.

Open design questions (resolve via a grill before implementation)

• Where it lives: inside the Settings → Actions form, or the Phase 3 layout surface.
• Which model it uses: the user's configured Desktop App model; how the request is issued.
• The flow: describe → model emits config JSON → validate against the schema → preview → save (or reject).
• Safety: how to guarantee a bad/hostile generation cannot brick the composer (ties into validate-on-load + drop-bad-entry from Chassis Actions: one-shot submit action end-to-end #46).
• Scope of generation: single action only, or whole layouts (depends on the grid design).

Definition of done for THIS issue

• A design pass (grill-with-docs) is run; decisions captured in CONTEXT.md + an ADR if warranted.
• A builder-assistant PRD is published with its own test seams.
• Implementation slices are filed and labelled ready-for-agent.

Blocked by

Schema must be stable (#46). Best sequenced after the grid design if layout generation is in scope.