Add PRESENTATION.md and update voices/todo notes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

PRESENTATION.md

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+# Presenting the Voice Assistant
+
+Notes on how to demonstrate this system effectively.
+
+---
+
+## Core insight
+
+The most compelling demo is an **unscripted real working session** — not a rehearsed script. The system's value is visible when it's actually being used to get things done. A scripted demo flattens the rough edges that make it feel real.
+
+The query journal (when implemented) will make it possible to replay or reconstruct a real session for a recorded demo.
+
+---
+
+## Most interesting things to show
+
+### Voice switching mid-session
+
+Switch between characters and have each one say something in character. The contrast between voices makes the capability concrete. The multi-voice demo scripts in `demos/` are a starting point but an improvised exchange lands better.
+
+### Doing actual work
+
+A real task — adding something to a list, asking a factual question, modifying a file — demonstrates the pipeline end to end. The fact that it works while doing something else (cooking, tidying) is part of the story.
+
+### The classifier working (and not working)
+
+Showing that short fragments don't trigger prematurely, and that send-words like "go" force dispatch, gives a sense of how the pipeline is designed. Showing a case where it misfires, and explaining why, is honest and interesting.
+
+### The "hands-free while doing something else" workflow
+
+If possible, demonstrate speaking while visibly occupied with something physical. This is the use case most people haven't thought about and it's immediately legible.
+
+### The planning capability
+
+This session itself is a good example: several hours of brainstorming, planning, and note-taking without touching a keyboard. The output (TODO.md, VOICES.md, CLEANUP-PLAN.md, WORKFLOWS.md, this file) is the artifact.
+
+---
+
+## What makes a good moment to record
+
+- Natural silence after a query where the system is clearly thinking, then responds
+- A voice switch that lands well and sounds good
+- A query that gets the classifier right — fragment doesn't dispatch, full sentence does
+- An unexpected result from a voice clone that prompts a reaction
+- A task that was actually useful, not just a demo task
+
+---
+
+## Things to prepare before a demo
+
+- Voice samples loaded and tested — all voices in `voices.yaml` checked for quality
+- TTS server running and warmed up (first response is slow)
+- At least one chime configured for acknowledgement
+- Silence timeout tuned so it doesn't misfire during normal speech pauses
+- A few interesting voice quotes ready to demonstrate character contrast
+
+---
+
+## Framing
+
+The system is not finished. That's fine to say. The interesting thing is that it's **useful now** in its current form, and the direction is clear. Showing the TODO and CLEANUP-PLAN alongside the working demo makes it credible — this is a real project, not a polished proof of concept that's going nowhere.