====== P4-REQ-21-11-013 ======

[[dido:99_annexes:annex-d-requirements:part-04:start| Return to Requirements]]

===== Statement =====

The Developer Handbook SHALL remain subordinate to the Phase 0 Implementation Profile / PSM.

===== Source =====

Part 4, Section 21.11: Developer Handbook Requirements.

===== Rationale =====

The Developer Handbook translates Part 4 implementation requirements into practical contributor rules. It is not an independent architectural or implementation-profile authority.

Keeping the handbook subordinate to the Phase 0 Implementation Profile / PSM ensures that handbook rules remain aligned with Part 4 and cannot override implementation mappings or requirements.

===== Applies To =====

This requirement applies to:

  * the Phase 0 Developer Handbook;
  * handbook rules and conventions;
  * handbook change control; and
  * implementation review.

===== Verification =====

Verification SHALL confirm that the Developer Handbook remains subordinate to the Phase 0 Implementation Profile / PSM.

Verification activities should include review checks confirming that:

  * handbook rules implement or support Part 4 requirements;
  * handbook rules do not override Part 4;
  * conflicts are resolved in favor of the approved implementation profile; and
  * handbook changes are reviewed against applicable Part 4 requirements.

===== Traceability =====

This requirement establishes the authority relationship between the Phase 0 Implementation Profile / PSM and the Developer Handbook.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-11-001]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-11-012]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-11-014]]

Related source section:

  * [[fxdemo:04-part:21-phase-0-implementation-requirements:21-11-developer-handbook-requirements:start]]

===== Status =====

Draft

----

<WRAP centeralign>

© 2026 Dido Solutions, Inc. and Jackrabbit Consulting, Inc.

</WRAP>