Add a clearly marked simulation of bounded vs unbounded exchange

[tobytkershaw]

Summary

Create a clearly marked website simulation that contrasts:

• an unbounded free-text agent-to-agent exchange
• a bounded AgentVault exchange

This should live on the marketing/documentation website, not in the live demo UI.

Why

We explored adding this comparison directly to the demo UI, but that risks undermining the demo's core value:

• the demo is strongest when it is a real run
• the centre panel should only show actual protocol execution
• any counterfactual baseline is inherently interpretive or simulated

The website is a better place to make this point, because it can be clearly framed as an illustrative simulation rather than a live product run.

Requirements

• must be explicitly labeled as a simulation / illustrative comparison
• must not be presented as a second live agent run
• should contrast:
  • what might leak in an unbounded exchange
  • what AgentVault reveals instead under a bounded contract
• should use scenario-authored examples, not uncontrolled generated transcripts
• should visually distinguish:
  • conversational / unbounded exchange
  • structured / receipt-backed bounded exchange

Suggested first scenarios

• salary negotiation
• co-founder mediation
• employment reference
• M&A compatibility

Non-goals

• changing the live demo UI
• introducing a second live agent loop
• pretending the unbounded side is an actual recorded run

Context

Related work and notes:

• agentvault#331 originally explored this in the demo UI
• the design note lives in av-codex/docs/architecture/demo-comparison-mode-notes.md

The current direction is to keep the live demo pure and move any illustrative comparison into the website instead.