Clarify Phase 5R reconciliation preservation rules

docs/HYPERTWIST_MODEL_A_MODEL_B_COORDINATOR_DOCTRINE_2026-05-14.md

@@ -153,6 +153,11 @@ For the current clean-room sequence:
   - bounded implementation one bound at a time
 - shared cross-lane reconciliation is an exception checkpoint, not the default
   immediate next step after every contribution pass
+- repo-local and shared reconciliation are additive, not reset-oriented
+- the coordinating instance must require those passes to account for all
+  qualifying prior clean notes and standing reconciled notes in scope
+- the coordinating instance must not allow earlier valid effort to disappear
+  silently; supersessions, exclusions, and deferrals must be explicit
 
 ## Closing rule
 

docs/HYPERTWIST_PHASE_5R_CLEAN_ROOM_PROMPT_AND_HANDOFF_PACKET_2026-05-14.md

@@ -41,6 +41,12 @@ That means the next work is:
 4. bounded clean implementation one repo and one bound at a time
 5. shared cross-lane reconciliation only when a repo-local consolidated note still flags real overlap
 
+Reconciliation rule:
+
+- repo-local and shared reconciliation are additive passes, not reset passes
+- they must account for all qualifying prior clean notes and any existing standing reconciled notes in scope
+- they must not silently omit earlier valid effort; any rejection, supersession, or deferral must be named with rationale
+
 It does not mean:
 
 - reopen broad `0R` evaluation
@@ -102,8 +108,8 @@ The active four-repo restrictive queue is:
 Recommended execution order remains:
 
 1. `cubing/alg.js`
-2. `cubing/twisty.js`
-3. `HactarCE/2x2x2x2-Scrambler`
+2. `HactarCE/2x2x2x2-Scrambler`
+3. `cubing/twisty.js`
 4. `kash/cubedesk`
 
 Reason:
@@ -166,6 +172,10 @@ Shared optional clean `Model B` cross-lane reconciliation:
 - starts directly from the shared `0500` prompt
 - reads only the affected repos' handoffs, standing reconciled notes, and
   staged clean notes
+- must account for all qualifying prior clean notes and standing reconciled
+  notes for the lanes in scope
+- must not silently drop earlier valid effort; any supersession or deferral
+  must be explicit
 
 Clean `Model B` bounded implementation:
 
@@ -173,8 +183,8 @@ Clean `Model B` bounded implementation:
 - one repo at a time
 - one bound at a time
 - no primer by default
-- consumes the standing cross-lane reconciled note plus the repo-specific
-  reconciled note
+- consumes the repo-specific reconciled note and, only if one was explicitly
+  created for that lane, the shared cross-lane reconciled note
 
 ## Primer rule
 
@@ -208,6 +218,9 @@ Shared cross-lane reconciliation is not the default next move.
 Use it only when the repo-local consolidated note still says a real owner-boundary
 or shared-contract overlap needs explicit coordination before implementation.
 
+That repo-local or shared reconciliation pass must account for all qualifying
+prior clean notes in scope and must not silently omit earlier valid effort.
+
 ## Repo-specific lanes and current boundaries
 
 ### `cubing/alg.js`