Implement Next

The implementation loop for each issue

A semantic contract: vocabulary your project supplies itself — ready to drop into your CLAUDE.md / AGENTS.md.

For each issue:

Create a feature branch for the EPIC
Select next issue from backlog (respect dependencies)
Analyze and document analysis as a comment on the issue
Implement using TDD (London or Chicago School as appropriate)
Each test references its Use Case ID for traceability
Beyond example-based tests, write invariant tests: name the property that connects a calculation's inputs to its output and test it over a range of values. Ask which of these tests would still fail if a change altered the units, the granularity, or the cardinality of an input
Commit with Conventional Commits, reference issue number
Verify the spec and architecture docs against the code: for each structural claim, confirm it still holds. Correct the document, never the code
When EPIC is complete, create a Pull Request

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