docs: adopt the contextual, streaming Mind architecture

docs/BEARING.md

@@ -7,6 +7,7 @@ timeline
     Phase 1 : Capture Core : macOS Surface : UPSTREAM Backup
     Phase 2 : Reflect Mode : Browse TUI : MCP Service
     Phase 3 : Perf Profiling : SSJD Realization : Multi-Mind Maturation
+    Phase 4 : Contextual Streaming Mind : One Thought One Atom : Witnessed Authority
 ```
 
 ## Active Gravity
@@ -17,7 +18,17 @@ timeline
 - Making the git-warp v17 checkpoint repair path repeatable for local minds.
 - Keeping version-specific repair logic outside normal capture and read flows.
 
-### 1. Think-on-Echo Runtime Proof
+### 1. Contextual Streaming Mind
+
+- Beginning P0 constitutional work for accepted `ADR-THINK-001`.
+- Making one immutable ThoughtCapture occurrence one addressable node atom
+  while keeping physical publication bounded by AdmissionWindows.
+- Making footprint exactness, streaming, process count, authority, projection
+  sufficiency, and erasure executable gates rather than ambient claims.
+- Keeping legacy production storage authoritative through P4 rehearsal and all
+  P5–P8 acceptance work, until the one verified P8 production cutover.
+
+### 2. Think-on-Echo Runtime Proof
 
 - Proving raw capture plus exact inspect as a Think-owned application contract
   hosted by Echo.
@@ -26,18 +37,18 @@ timeline
 - Using the proof to shape the next store boundary refactor without switching
   production capture prematurely.
 
-### 2. Performance Hardening
+### 3. Performance Hardening
 
 - Profiling CLI capture to identify Node startup and WARP graph bottlenecks.
 - Benchmark harness maturation for warm-path regression detection.
 - Sub-second capture latency as a non-negotiable target.
 
-### 3. Domain Integrity (SSJD)
+### 4. Domain Integrity (SSJD)
 
 - Refactoring the MCP service layer to move from "shape soup" to runtime-backed domain types.
 - Standardizing function signatures and boundary validation across the store and CLI layers.
 
-### 4. Orientation & Re-entry
+### 5. Orientation & Re-entry
 
 - Learning where the browse and remember surfaces fail through re-entry friction tracking.
 - Tuning hotkey ergonomics and macOS URL scheme reliability.
@@ -48,10 +59,16 @@ timeline
 - **Service Layer Debt**: The MCP layer lacks explicit domain model enforcement (plain objects only).
 - **Multiple Minds UX**: Mind-switching in the TUI is powerful but needs smoother orchestration for agents.
 - **Upstream Friction**: Provisioning a day-one backup remote remains too manual.
+- **Optic Exactness**: Streaming bounded resident state does not yet prove that
+  every production optic reads only its complete causal support slice.
+- **Cutover Discipline**: The replacement architecture is accepted, but all
+  five gates, the complete AC1–AC35 proof, and a witnessed P8 switch stand
+  between design and authority.
 
 ## Next Target
 
-The immediate architecture focus is **Think-on-Echo contract proof**: prove raw
-capture plus exact inspect through Echo before any default production store
-switch. Local Mind Repairability remains the data-rescue lane for existing
-`git-warp` minds.
+The immediate architecture focus is **ADR-THINK-001 P0 constitutional
+foundation**: freeze and execute the bulk-admission, two-level observation,
+fixture-capability, authority-policy, and erasure-storage gates. Think-on-Echo
+continues as an independent runtime proof, and Local Mind Repairability remains
+the data-rescue lane. Neither authorizes a default production store switch.