refac: Refactor piecewise API to a stateless construction layer + tangent_lines utility#638

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feat/piecewise-api-refactor

Commits on Apr 1, 2026

refac: replace piecewise descriptor pattern with stateless construction layer

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refac: use keyword-only args for 2-variable piecewise API

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docs: use breakpoints() in CHP example and add plot

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fix: broadcast N-variable breakpoints over expression dims

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docs: generalize plot_pwl_results for N-variable case

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docs: rewrite piecewise documentation for new API

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refac: extract piecewise_envelope, remove sign from piecewise API

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rename piecewise_envelope to piecewise_tangents

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rename to tangent_lines — not piecewise, just linear expressions

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refac: move tangent_lines into piecewise.py, remove linearization.py

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docs: clarify equality vs inequality — when to use what

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refac: tuple-based API for add_piecewise_constraints

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feat: use variable names as link dimension coordinates

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fix: remove piecewise.piecewise from api.rst, fix xr.concat compat in notebook

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fix: add coords='minimal' to xr.concat calls for forward compat

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feat: add per-entity breakpoints example, fix scalar coord handling

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docs: use fuel as x-axis in CHP plot for physical clarity

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docs: fix per-entity plot to use fuel on x-axis with correct data

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docs: update release notes for piecewise API refactor

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docs: frame piecewise as new feature in release notes, not refactor

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fix: resolve mypy type error in incremental bp0_term assignment

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docs: restructure piecewise documentation for readability

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fix: add type: ignore comments to resolve mypy errors

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refac: remove dead code
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refac: inline _add_dpwl_sos2_core into _add_disjunctive, remove dead code

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refac: clean up piecewise module (#641)

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feat: generalize disjunctive formulation to N variables

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refac: Refactor piecewise API to a stateless construction layer + tangent_lines utility#638

refac: Refactor piecewise API to a stateless construction layer + tangent_lines utility#638
FBumann wants to merge 30 commits intomasterfrom
feat/piecewise-api-refactor

Commits on Apr 1, 2026

refac: replace piecewise descriptor pattern with stateless construction layer

refac: use keyword-only args for 2-variable piecewise API

docs: use breakpoints() in CHP example and add plot

fix: broadcast N-variable breakpoints over expression dims

docs: generalize plot_pwl_results for N-variable case

docs: rewrite piecewise documentation for new API

refac: extract piecewise_envelope, remove sign from piecewise API

rename piecewise_envelope to piecewise_tangents

rename to tangent_lines — not piecewise, just linear expressions

refac: move tangent_lines into piecewise.py, remove linearization.py

docs: clarify equality vs inequality — when to use what

refac: tuple-based API for add_piecewise_constraints

feat: use variable names as link dimension coordinates

fix: remove piecewise.piecewise from api.rst, fix xr.concat compat in notebook

fix: add coords='minimal' to xr.concat calls for forward compat

feat: add per-entity breakpoints example, fix scalar coord handling

docs: use fuel as x-axis in CHP plot for physical clarity

docs: fix per-entity plot to use fuel on x-axis with correct data

[pre-commit.ci] auto fixes from pre-commit.com hooks

docs: update release notes for piecewise API refactor

docs: frame piecewise as new feature in release notes, not refactor

fix: resolve mypy type error in incremental bp0_term assignment

docs: restructure piecewise documentation for readability

fix: add type: ignore comments to resolve mypy errors

[pre-commit.ci] auto fixes from pre-commit.com hooks

refac: remove dead code

refac: inline _add_dpwl_sos2_core into _add_disjunctive, remove dead code

refac: clean up piecewise module (#641)

feat: generalize disjunctive formulation to N variables

[pre-commit.ci] auto fixes from pre-commit.com hooks