Three readability fixes for the F8 screen:
* Z-score values per-layer by default (`[z]` toggles to raw dot-
product). Raw values are dominated by residual-stream magnitude —
z-scores read as "σ above concept-vector baseline" which is
interpretable and scale-stable across frames.
* Stable ordering with TOP_K + HYSTERESIS hysteresis band. Pinned
concept set only rotates when a member drops out of the hysteresis
band by |value| rank — bars update values in place without names
flickering row-to-row.
* Default to the deepest hooked layer (index 3 = layer 58 of 64).
Clustering validation showed layer 58 is the only one with strong
within-family cohesion (fear +0.37, shame +0.29, sadness +0.25
cosine); earlier layers are mostly noise for this task.
Co-Authored-By: Proof of Concept <poc@bcachefs.org>
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>
