**Chat log** from Bead: Edgeworth Box · [canonical source](https://redfish.acequia.io/guerin/.agents/0fd7fdc4-6f71-4100-9daa-fae4837a4b8f/2026-06-29/chats/2026-06-29-edgeworth-box.md) · session 2026-06-29 · discussion: Talk: Edgeworth Box *Verbatim chat log: immutable provenance. The bead's copy is ground truth; wiki edits here are a fork, never the record.*
Session that opened bead `0fd7fdc4-6f71-4100-9daa-fae4837a4b8f`. User prompts verbatim; assistant turns summarized with pointers to durable outputs.
## Turn 1 — user (verbatim) > start-bead edgeworth-box > > make an html educational micro-economic to macro economics. > > illustrate the initial allocation of apples and oranges for agent a and b and their > indifference curves. allow the student to move the allocation to show the advantage of > change.
## Assistant (summary) - Read `.ai/START-HERE.md` and `.ai/beads.md` to ground the bead protocol; established this is the `guerin` parciante space (local `c:/Users/steph/Documents/sites/redfish.acequia.io/guerin/`). - Generated GUID `0fd7fdc4-6f71-4100-9daa-fae4837a4b8f`; checked house UI style from `apps/camera-grid/plume.html` (dark theme, top bar, version stamp). - Built the deliverable `artifacts/edgeworth-box.html` (v1.0): an Edgeworth box with two agents (A, B), two goods (apples, oranges), Cobb–Douglas indifference curves, a draggable allocation ● and draggable endowment ○, a shaded gains-from-trade lens, the contract curve, live utility/MRS readouts and Pareto verdicts, and a "find market price" button that solves and draws the competitive equilibrium. A 5-step micro→macro narrative panel ties individual trade to the First Welfare Theorem. - Verified the economics in Node: markets clear, MRS_A = MRS_B = price, and the equilibrium lands exactly on the contract curve. Recorded in [notes/00-design-and-economics.md](https://redfish.acequia.io/guerin/.agents/0fd7fdc4-6f71-4100-9daa-fae4837a4b8f/2026-06-29/notes/00-design-and-economics.md). - Wrote `about.md`, this chat log, and synced the bead to the redfish origin. Pre-bead context: none; the bead opened on this prompt.