/preview

name: preview
description: "The user is about to commit to one of several directions they cannot judge from descriptions: they can then say what each means for their purpose, on what ground, and which one they take."

Proplasma Protocol

Expose direction unknowns through divergent-discard instantiation before commitment. Type: `(DirectionUnrecognizable, Hybrid, PREVIEW, DirectionProspect) → DirectionalContrast`.

Definition

**Proplasma** (πρόπλασμα): the preliminary clay model a sculptor shapes before committing to marble. A dialogical act for the moment right before a direction commitment when the candidate directions cannot be recognized from their descriptions: the AI relays what it is about to build — its reading of the purpose, the axes the purpose turns on, the placeholder policy, which candidates get probes, and the tier — each with its basis, builds cheap placeholder probes that commit different values on those axes, and shows the probes and a map of the directions: per axis, what each direction's future looks like and what that rests on — a probe the person saw, a description alone, their own account, or evidence. The person's words are laid beside what was shown, and the person settles a direction; they can stop at any time, and the run stays as it stood. Probes are discard-committed instruments — evidence for no claim, never promoted.

/-!
How to read this block. It is core Lean 4 and elaborates as written, and you are the model it is
written for: you read it, and by inference over the context you settle each element it leaves
open. Every `axiom` is one of those judgments — a black box to the contract, yours to make from
the material in front of you; its doc comment says what you judge there, and nothing in this
block decides it for you. Every `def`, `inductive`, and `structure` is fixed by the contract.
-/

/-! ── FLOW ──
Proplasma(X) → start(c) → preview(c, utterances), where c is the fused session context:
  start: what bears on the decision is gathered; then your reading, on it, that this is not this
    protocol's case (`notActivated`), in plain words with its basis → not activated; otherwise
    → fan → carry → round
  fan(c): the spec relayed whole — your reading of the purpose, marked as yours unless they said
    it; the axes the purpose turns on; the placeholder policy; which candidates get probes and why
    any waits; the tier — each with its basis, and on every later fan what changed since the last;
    it yields no turn → the probes, each entering c as written, then what they make worth gathering
  carry(c): the fans you carry on your own judgment, one after another, each where `FanCarried`
    reads one on the context the previous one left, as far as `reach` reads — each relayed, then
    built as a fan is, then what it makes worth gathering
  round: after the turn's fans, where any ran, each new probe from its realization, and the
    map — whole on the first round, what changed on a later one, whole when asked: per
    axis, what each direction's future looks like there and what that rests on; the premises every
    probe shares; the open unknowns with what would settle each; your readings and contrary
    grounds, each with what it bears on and rests on → one opening, or a contradiction's working
    with nothing after it
  next utterance u, read on fuse(c, u):
    [does not bear on this run]   the session answers it; that answer stays in c; no round of
                                  this run
    [the person constitutes d]    harvest → cleanup → DirectionalContrast
    [otherwise]                   what is gathered now enters c, anything they asked to see
                                  observed for real among it; a fan where they ask for one; then
                                  the fans you carry, as `FanCarried` and `reach` read → round
  no utterance: nothing is constituted, generated, gathered, or discarded; the run holds
-/

/-! ── MORPHISM ──
DirectionProspect
  → gather          -- what bears on the decision, read or run now — what they asked to see observed included (focus)
  → relay_spec      -- the spec whole with its basis, BEFORE any generation; on a later fan, with what changed
  → instantiate     -- placeholder probes over the candidates the relay named for probes,
                    -- temp-isolated, each realization registered
  → gather          -- what the probes make worth gathering, read or run now
  → carry           -- the fans you carry on your own judgment (`FanCarried`, `reach`), each relayed before it builds, then gathered
  → present         -- the probes and the map: per axis what each future shows and what it rests on (focus)
  → fuse(u)         -- the person's turn joins the context whole
  → constitute      -- the person's closing over the map (`ClosingSupported`)
  → harvest         -- direction + deciding cells + open unknowns, read BEFORE discard
  → cleanup         -- per-probe discard, each disposition observed → the discard trace
  → assemble        -- the record, built from the harvest and the completed discard trace
  → DirectionalContrast
requires: pre_commit(direction) ∧ |direction_candidates(X)| ≥ 2   -- read before activation (`notActivated`)
deficit:  DirectionUnrecognizable                                  -- activation precondition (Layer 1/2)
preserves: commit_target_identity(X)   -- the pending commitment is unchanged; probes and gathering change no existing state; the context only grows
invariant: Contrast over Simulation    -- direction judgment rests on recognized materialized futures, not mental simulation
invariant: Grounded, not asserted      -- every cell says what it rests on; a probe is evidence for no claim
invariant: after activation only the person closes; your readings settle no closing
The steps between gather and constitute are how you work toward recognizable futures; the
contract fixes the deficit and its resolution, the coordinates only the person fills — the clos