Date: 2026-02-27 Source: design_docs/graphshell_docs/implementation_strategy/PLANNING_REGISTER.md Reason: Reduce active-register size and remove stale historical/reference payload from the canonical execution surface.

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The following content blocks were removed from the active PLANNING_REGISTER.md tail and archived by reference:

1. ## 4. Recommended Execution Sequence (2026-02-25 Refresh)
2. ## 5. Registry Plan Closure Backlog (Audited 2026-02-24, retained 2026-02-25)
3. ## Reference Payload (Preserved Numbering / Historical Layout)
4. Legacy duplicated tail sections:
   • ## 2. Backlog Ticket Stubs
   • ## 3. Implementation Guides
   • ## 4. Suggested Tracker Labels
   • ## 5. Import Notes

These blocks were explicitly marked as historical/reference or archive-index content and were superseded by active control-plane sections (§1A, §1C, §1D) in the same file.

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Use these sources for the archived payload details:

• design_docs/archive_docs/checkpoint_2026-02-25/2026-02-25_backlog_ticket_stubs.md
• design_docs/archive_docs/checkpoint_2026-02-25/2026-02-25_copilot_implementation_guides.md
• design_docs/archive_docs/checkpoint_2026-02-25/2026-02-25_planning_register_lane_sequence_receipt.md
• design_docs/archive_docs/checkpoint_2026-02-26/2026-02-26_planning_register_queue_execution_audit_receipt.md

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After this archive action, the active planning control-plane remains in:

• PLANNING_REGISTER.md sections §1A, §1B, §1C, and §1D
• 2026-02-27_roadmap_lane_19_readiness_plan.md for docs-only roadmap execution while #19 is blocked

This receipt is the preservation pointer for the removed historical tail.