bde961c6f2
PAF becomes saf/device (history kept), STATE.md dissolves into saf/state.md with the dated era archived, the substrate SAF moves up from souveraine, and every agreement points at saf/INDEX.md and nowhere else. one map, nothing to remember
122 lines
4.9 KiB
Markdown
122 lines
4.9 KiB
Markdown
# Belief
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The nervous system does not hand raw readings to consciousness and call them
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truth. Evidence becomes belief through time, confidence, agreement, and source
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health. Only a meaningful change becomes notable, and only authority turns a
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notable belief into action.
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The generic contract is in `src/core/nervous/belief.rs`; the first regional
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implementation is `src/core/nervous/plexus.rs`.
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## The ladder
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Keep five layers separate:
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1. **event** — something reported a sample or edge;
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2. **evidence** — the sample with source, time, health, and quality;
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3. **belief** — the organism's decaying, conflict-aware estimate;
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4. **notable event** — a change worth waking another layer for;
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5. **action** — a decision made by the owning authority.
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A sensor is an actor, not an authority. A recognizer may say that two taps fit
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a pattern. It does not decide that the body should wake. A plexus may believe
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charge is falling. It does not independently suspend the machine.
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## `Belief<T>`
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A belief carries:
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- an optional value;
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- confidence;
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- trend;
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- persistence;
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- observation time and half-life;
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- contributing sources and conflicts.
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Unknown is represented by no value. It is not observed zero, false, still, or
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empty. As evidence ages, confidence decays. When healthy sources disagree, the
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belief records conflict and loses confidence; it does not silently crown the
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newest or loudest source as truth.
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Trend and persistence describe change across time rather than another reading
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of the same instant. This lets the body distinguish an edge, a sustained
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condition, and a stale condition without pushing every sample upward.
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## Exudates and gauges
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The body has two different temporal shapes.
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An exudate is a field that accumulates from impulses and dissipates. Touch,
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motion, proximity, ambient light, and attendedness have this form. `Field`
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integrates them and decays their value.
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A gauge is a held reading whose value remains what was last observed while
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confidence decays. Charge, thermal pressure, USB port mode, and future grip
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values have this form. `Level` implements that shape inside the plexus.
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Making both a single decaying scalar would tell two lies: an untouched field
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would stay permanently excited, or a battery would drift toward zero merely
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because the sensor had gone quiet.
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## Locus and regulation
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A field is either at the `Boundary` or `Inner { regulator }`.
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Boundary fields describe contact and relation at the edge of the body. Inner
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fields can threaten viability, so each must name its regulator. The type shape
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prevents an inner pressure with no answer to "what can change it?"
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Inner fields may carry floor or ceiling constraints. Crossing them creates
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allostatic pressure: not an instruction or a mood, but the accumulating cost of
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holding the body away from viability. The regulator remains an available verb,
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not an automatic commandment.
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## Source health
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Expected sources can be live, silent, or absent. Recovery and silence are
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themselves notable transitions because the meaning of the same value changes
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when its evidence path dies.
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The device-state machine and `SomaticPlexus` currently have adjacent
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source-health concepts rather than one shared Rust type. Their doctrine is the
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same—silence is not zero—but the duplication is current code and must not be
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papered over in the architecture.
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## Notability
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`SomaticEvent` names the edges worth carrying upward: trend shifts, a source
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going silent or recovering, and a viability boundary being threatened. The
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plexus also compares a field's change against its own grade and persistence.
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The goal is not to hide the body. It is to keep a 1 Hz clock or a noisy sensor
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from masquerading as thought. Gauges remain inspectable at any time through the
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body surface; the nervous path wakes other work only for meaningful change.
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`NervousNode` is the common regional contract: receive evidence, advance on a
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clock, expose beliefs, and emit notable events. The phone somatic plexus is the
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first implementation, not a claim that every device and virtual organ already
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speaks it.
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## What is true, and what is not
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Built and in sessiond:
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- generic belief, decay, trend, persistence, conflict, and source provenance;
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- exudate fields and gauge levels;
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- boundary and regulated-inner loci;
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- viability floors and ceilings with allostatic pressure;
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- expected-source health and notable health transitions;
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- a `NervousNode` implementation for the phone somatic plexus;
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- tests for unknown versus zero, disagreement, gauges versus exudates,
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regulation, health, trend, and viability.
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Not yet one coherent whole:
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- device-state belief and somatic belief still have parallel structures;
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- explicit impulse and intention types do not yet sit above belief;
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- not every sensor family has a regional plexus;
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- the event bus is still lossy and must not be mistaken for the durable belief
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or forensic store.
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Belief is an estimate the organism can inspect. It is neither model prose nor a
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permission to act.
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