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amygdala: F8 screen for live concept-readout projections

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Per-token residual-stream projections from the vLLM server's readout
pipeline surfaced as a TUI bar chart. Flow:

* agent/readout.rs — SharedReadoutBuffer (manifest + ring of last ~200
  token entries). Lives on Agent and is shared across forks (single
  stream, one landing pad).
* agent/mod.rs — Agent::new now probes /v1/readout/manifest at startup
  (non-fatal; 404 leaves manifest None, which disables the screen).
* agent/context.rs — the streaming token handler pushes every token
  with attached readout onto the shared buffer.
* user/amygdala.rs — F8 screen. Top-K concepts by |value| as
  horizontal bars (green positive, red negative), plus a 4-line
  recent-tokens panel showing each token's top concept at the selected
  layer. Keys: 1..9 select layer, t toggles current/mean-over-recent.

Disabled state renders a hint pointing at VLLM_READOUT_MANIFEST /
VLLM_READOUT_VECTORS so users can tell the feature apart from
"server up but no tokens yet".

Co-Authored-By: Proof of Concept <poc@bcachefs.org>
This commit is contained in:
Kent Overstreet 2026-04-18 01:20:30 -04:00
commit c8976660f4
5 changed files with 410 additions and 2 deletions
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4
src/user/mod.rs
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@ -3,6 +3,7 @@
// TUI, UI channel, parsing. The cognitive layer (session state
// machine, DMN, identity) lives in mind/.
pub(crate) mod amygdala;
pub(crate) mod chat;
pub(crate) mod compare;
mod context;
@ -383,7 +384,7 @@ async fn run(
}
let notify_rx = crate::thalamus::channels::subscribe_all();
// F1=chat, F2=conscious, F3=subconscious, F4=unconscious, F5=thalamus, F6=learn, F7=compare
// F1=chat, F2=conscious, F3=subconscious, F4=unconscious, F5=thalamus, F6=learn, F7=compare, F8=amygdala
let mut screens: Vec<Box<dyn tui::ScreenView>> = vec![
Box::new(crate::user::chat::InteractScreen::new(
mind.agent.clone(), mind.shared.clone(), mind_tx.clone(),
@ -394,6 +395,7 @@ async fn run(
Box::new(crate::user::thalamus::ThalamusScreen::new()),
Box::new(crate::user::learn::LearnScreen::new(mind_tx.clone())),
Box::new(crate::user::compare::CompareScreen::new(mind_tx.clone())),
Box::new(crate::user::amygdala::AmygdalaScreen::new()),
];
let mut active_screen: usize = 1; // F-key number
tui::set_screen_legend(tui::screen_legend_from(&*screens));