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epicR 1.0.0

Major changes

• Modularized C++ engine into separate compilation units (model_input.cpp, model_output.cpp, model_events.cpp).
• Replaced hardcoded input values with JSON-based configuration files (inst/config/config_canada.json, inst/config/config_us.json).
• Added multi-jurisdiction support (Canada and US).
• Added simulate() function that manages sessions automatically, replacing manual init_session() / run() / terminate_session() workflow.
• Removed MI, stroke, and heart failure modules from the model.

New features

• simulate() gains n_agents parameter for setting population size.
• simulate() gains return_events option for returning individual-level event data.
• Real-time progress bar during simulation runs.
• User-level configuration management with get_user_config(), set_user_config(), and reset_user_configs().
• Validation functions now support jurisdiction-specific comparisons.
• New validate_exacerbation() function consolidates exacerbation validation by sex.
• Added exacerbation counts by calendar time and sex to extended outputs.
• Added cost tracking outputs (cumul_cost_gold_ctime, cumul_qaly_gold_ctime) to extended results.

Bug fixes

• Fixed out-of-bounds array access in n_exac_by_medication_class (array sized [3] but exac_status can be 1–4).
• Fixed event code inconsistencies and exacerbation counts per GOLD stage.
• Fixed crash when using simulate() with return_events = TRUE.
• Fixed auto-termination logic to prevent premature session cleanup.

Other improvements

• Reduced installed package size (compiled shared library reduced from ~6.5 MB to ~0.4 MB).
• Improved memory management in the C++ engine.
• Internal functions (init_session(), run(), terminate_session()) are no longer exported.
• Improved documentation and vignettes.
• Added comprehensive test suite.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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