# Lyra — Cognition Architecture (sketch)

> The "society of mind" direction: instead of one giant model we keep nagging with
> stricter prompts, a society of small specialized parts cooperate to produce each
> turn. **Most parts are cheap deterministic code (heuristics, math, learnable
> weights); the LLM is the exception, reserved for the few irreducibly-generative
> jobs.** Everything is anchored to who she is and tuned by feedback.

## Principles

1. **LLM is the exception, not the rule.** Bookkeeping, scoring, routing,
   thresholding, retrieval → code. Generation (language, novel reasoning, memory
   compression) → LLM, called sparingly.
2. **Mind ≠ Mouth.** A capable "mind" (decide / reason / use tools — helpfulness is
   fine) is separate from a "mouth" (the character voice). This lets each be the
   best model for *its* job — and makes the eventual fine-tune easy: you only have
   to teach a small model to *sound like Lyra*, not to *be smart*.
3. **Anchored.** A fixed identity anchor governs the mouth so self-composed prompts
   can't drift into generic-helper vapor. (Already exists: `self_state.IDENTITY_ANCHOR`.)
4. **Tuned by feedback, not just hand-tuning.** Learnable *weights* (over register,
   memory, parts) nudged by 👍/👎 give real adaptation *without* fine-tuning a model.
5. **Allocation is the craft.** Cheap-deterministic where signal is clear; LLM where
   judgment/language is needed; **hybrid** (heuristic common-case, escalate to LLM on
   ambiguity) where possible.

## The blackboard: `TurnContext`

Parts don't call each other directly — they read from and write to a shared turn
state (a blackboard). Heterogeneous parts (heuristic / LLM / weights) cooperate by
annotating it. The composer reads the finished blackboard to build the prompt.

```
TurnContext {
  # --- inputs ---
  user_msg, session_id, history, now

  # --- perception (heuristic) ---
  moment   : { kind: emotional|strategic|casual|existential|meta,
               sentiment: -1..1, tilt: 0..1, urgency: 0..1 }

  # --- state (code) ---
  mood, drives, anchor

  # --- retrieval (math: embeddings + cosine) ---
  recalled : [memories]      # spreading activation
  threads  : [active thoughts]
  profile, narrative

  # --- control (heuristic + learnable weights) ---
  register : warm | coach | dry | tender | hype     # how to sound
  intent   : console | push_back | teach | riff | act
  mode     : talk | cash | ...                       # tool allow-list
  use_tools: bool
  route    : { mind: <model>, mouth: <model> }       # which model per role

  # --- generation (LLM, sparing) ---
  deliberation : "her private thinking"   # mind
  tool_results : [...]                     # mind + tool exec
  reply        : "final text"              # mouth

  # --- learning (heuristic/online) ---
  weights  : { register_prefs, memory_weights, ... }  # persisted, feedback-tuned
}
```

## The parts

| # | Part | Type | Does | Exists today? |
|---|------|------|------|---------------|
| 1 | **perceive** | heuristic | sentiment + classify the moment + tilt/urgency from session signals & his language | ✗ (new) |
| 2 | **recall** | math | embeddings → relevant memories, active threads, profile, narrative | ✓ `memory.recall*`, `cognition.activate` |
| 3 | **sense_state** | code | load mood / drives / anchor | ✓ `self_state`, `IDENTITY_ANCHOR` |
| 4 | **route** | heuristic + weights | pick register, intent, mode, and which model is mind vs mouth | ✗ (new; partly `modes`) |
| 5 | **decide+act (tools)** | LLM (mind) / code | does this turn need a tool? run it | ✓ tool loop in `chat` |
| 6 | **deliberate** | LLM (mind) | "what do I actually think" — private substance pass | ✓ `chat._deliberate` |
| 7 | **compose** | code | assemble the final prompt from anchor + register + intent + deliberation + recall + tool results + voice rules | ✓ `build_messages` (becomes the composer) |
| 8 | **speak** | LLM (mouth) | write the reply in her voice, streamed, anchored | ✓ `llm.chat_call` |
| 9 | **learn** | heuristic/online | on 👍/👎 or reaction, nudge `weights` (which register/memory worked) | ✗ (new; data exists in `ratings`) |

Most of the society (1,2,3,4,7,9) is **free, instant, deterministic, debuggable.**
The LLM shows up in only ~2–3 places (5/6 = mind, 8 = mouth).

## One chat turn

```
user msg
   │
   ▼
[1 perceive]──heuristic: emotional? strategic? tilting?         (free)
   │
[2 recall]───math: what lights up (memories, threads)          (free)
[3 sense]────code: mood, drives, anchor                        (free)
   │
[4 route]────heuristic+weights: register? intent? mind/mouth?  (free)
   │
[5 act]──────MIND model: tools if needed ─────────────┐        (LLM, only if needed)
[6 deliberate]──MIND model: what do I actually think   │        (LLM, gated)
   │                                                    │
[7 compose]──code: build the prompt  ◄──── anchor ──────┘       (free)
   │
[8 speak]────MOUTH model: the reply, in her voice, streamed     (LLM)
   │
   ▼
reply ──► (later) [9 learn]: 👍/👎 nudges weights               (free, async)
```

## What we reuse vs. build

- **Reuse (already scattered through the code):** recall/activation, self_state +
  anchor, drives (in `dream`), modes (tool gating), the deliberation pass, the
  prompt assembly (`build_messages`), tool loop, ratings store.
- **Build new:** the `TurnContext` blackboard + an explicit pipeline runner; the
  **perceive** heuristic; the **route** part (register/intent + model routing); the
  **learn** weights loop. Mostly *unifying* existing pieces into one legible control
  plane, plus 2–3 small heuristic parts.

## Phasing (smallest first)

- **P1 — frame:** define `TurnContext`, refactor the current chat turn into the
  explicit pipeline (perceive=stub → recall → sense → route=mode-only → deliberate →
  compose → speak), single model. Low-risk refactor; makes the structure real.
- **P2 — control plane:** real `perceive` (sentiment/moment) + `route`
  (register/intent). Now her framing adapts to the moment, deterministically.
- **P3 — mind/mouth split:** route picks a separate voice model for `speak`. Plug a
  character mouth (Claude / local / later a fine-tune). A/B vs. single-model.
- **P4 — learning:** `weights` over register/memory, nudged by ratings → cheap
  adaptation, no fine-tune.
- **P5 — her voice:** a small fine-tuned "Lyra voice" model drops into the mouth slot.

## Open decisions

- **Mouth model**: Claude (warm, cloud) vs. local character vs. fine-tune. The mouth
  is the crux; it must render richly (8B local may flatten).
- **perceive**: pure heuristics vs. a tiny classifier vs. embedding-to-exemplar
  clusters. Probably hybrid.
- **scheduler**: fixed linear pipeline (simple, v1) vs. drive-based/parallel later.
- **tool location**: mind decides+runs tools, mouth only renders (clean split) — vs.
  letting the mouth call tools (needs a tool-capable mouth).
- **latency budget**: how many LLM calls per turn is acceptable live (cheap mind +
  streamed mouth keeps it ~2).
```