Add ai-code-project-template repo files.

.claude/commands/prime.md

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+## Usage
+
+`/prime <ADDITIONAL_GUIDANCE>`
+
+## Process
+
+Perform all actions below.
+
+Instructions assume you are in the repo root directory, change there if needed before running.
+
+RUN:
+make install
+source .venv/bin/activate
+make check
+make test
+
+READ:
+ai_context/IMPLEMENTATION_PHILOSOPHY.md
+ai_context/MODULAR_DESIGN_PHILOSOPHY.md
+
+## Additional Guidance
+
+$ARGUMENTS