# Signal Geometry

Translate one idea into one precise spatial behavior, then render it as a sparse geometric system on clean matte paper. Generate the image by default when the required capabilities are available; otherwise return the compiled prompt and recipe.

## Visual identity

Build every image from these invariants:

- **One event:** express one relationship such as orbit, convergence, divergence, compression, deflection, propagation, oscillation, filtering, enclosure, or release.
- **Quiet field:** let the motif span the composition when useful while keeping actual mark density low. Aim for roughly 70%-95% quiet background and 2%-8% line, dot, hatch, or mesh coverage.
- **Equal polarity:** treat light and dark as equal modes. Use clean neutral off-white stock for light mode and charcoal-dyed stock for dark mode.
- **Material surface:** render a full-frame, flat, uncoated matte paper surface with fine irregular grain and faint fibers. Keep it visible at full size and quiet at thumbnail size. Present the paper without borders, mockup depth, edge shadows, stains, tears, or vintage distress.
- **Precision marks:** use hairlines, arcs, dots, nodes, particles, restrained hatching, grids, or wireframe meshes. Use a three-step contrast hierarchy: faint scaffold, readable structure, and very few bright anchors.
- **Restrained color:** stay grayscale by default. When color carries meaning, use one pin-sized coral, orange-red, or cobalt accent covering less than about 0.2% of the canvas.
- **Text gate:** include no text by default. When text is explicitly necessary, use only the user's exact wording as one short phrase or up to three micro-labels, with no more than six words total.
- **Editorial finish:** keep the rendering crisp, orthographic, calm, analytical, and slightly speculative. Let topology, rhythm, scale, and transformation create interest.

Use the reference set to anchor geometry, spacing, hierarchy, restraint, and matte material. Treat its light and dark examples as equal modes.

## Formats

- Use `16:9` for a default illustration.
- Use `4:5` for a poster request. Recompose vertically instead of cropping a landscape layout.
- Use approximately `2.2:1` only for an explicit ultrawide request.
- Honor exact dimensions supplied by the user.

When polarity is unspecified, choose the mode that gives the spatial event the clearest contrast and record the choice in the recipe.

## Grammar families

Choose one primary family. Add at most one subordinate mark language when the relationship needs it.

| Family | Best for | Primary marks |
| --- | --- | --- |
| Orbital field | cycles, gravity, recurrence, scale, mutual influence | circles, arcs, radial ticks, loops, spherical meshes |
| Flow transformation | emergence, routing, filtering, pressure, change | streamlines, particles, arrows, gates, obstacles |
| Signal strip | rhythm, cadence, phases, comparison, accumulation | waveforms, lanes, bars, repeated measures, faint grids |
| Topology map | relationships, context, systems, dependencies | nodes, edges, frames, sparse modules |
| Layered field | tension, thresholds, overlap, latent depth | ruled planes, hatching, contours, wireframe surfaces |

## Workflow

### 1. Lock the brief

Identify the concept, emotional temperature, output format, polarity, text policy, and execution mode. Infer only values the user left open, using the defaults above.

Set execution mode to `rendered` only when image generation and image inspection capabilities are both available. Use `prompt-only` when the user requests it or either capability is unavailable.

Completion criterion: all six values are explicit before composition begins, and any unavailable capability is recorded for delivery.

### 2. Distill the spatial proposition

Turn the concept into one transformation verb and one primary grammar family. Write one internal visual sentence that states what moves, changes, or relates to what. Prefer abstract relations over illustrated nouns.

Completion criterion: the image can be described in one sentence without listing unrelated objects or multiple events.

### 3. Lock quality anchors

Read [references/example-index.md](references/example-index.md) and select one or two matching entries. Inspect each linked image when image inspection is available; otherwise use the entry description as the quality anchor. For every selected anchor, record one anchor delta:

- three invariants to preserve;
- three axes to change across format, topology, composition, viewpoint, polarity, motion, scaffold, or accent.

Use the examples as quality anchors, not layouts. Do not pass sample filenames, provenance, or sample-specific content into the image prompt.

Completion criterion: every selected anchor has a three-invariant, three-axis anchor delta, and the planned composition satisfies each delta.

### 4. Declare the recipe

Choose exactly one value for each axis:

- format: `16:9`, `4:5`, `2.2:1`, or supplied dimensions;
- polarity: ligh

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