====== 20.9 Developer Handbook Does Not Replace the Implementation Profile ======

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[[fxdemo:04-part:20-phase-0-implementation-rules-and-constraints:start | Return to Phase 0 Implementation Rules and Constraints ]]

The Phase 0 Developer Handbook defines practical development rules for contributors. It does not replace the Phase 0 Implementation Profile / PSM.

The handbook defines file-header rules, generated-file markings, coding style, naming conventions, logging conventions, [[dido:99_annexes:annex-b-terms-and-definitions:e:exception_handling|Exception Handling]] patterns, Repository Workflow, script usage, and review checklists. These rules help contributors apply Part 4 consistently.

Part 4 defines the implementation profile, implementation mappings, implementation artefact categories, governance model, [[dido:99_annexes:annex-b-terms-and-definitions:t:traceability|Traceability]] model, rules, constraints, and requirements. The handbook remains subordinate to Part 4.

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

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