[Lean Squad] feat(fv): Task 6 — Lean–C# correspondence review for primary targets

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Amaury Levé (Evangelink)]

Document how each Lean 4 model maps to the C# source for the three primary FV targets:

• ArgumentArity: structure mapping, Int approximation, Int32.MaxValue sentinel, DecidableEq, excluded GetHashCode/object.Equals, theorem correspondence table
• CommandLineParser.TryUnescape: signature simplification (IEnvironment→newLine, option dropped, out params→Except), sequential Replace order, bug edge cases treated as unreachable in spec
• TreeNodeFilter.MatchFilterPattern: FilterExpression hierarchy → inductive type, Regex abstracted to String→Bool, PropertyBag abstracted, Boolean-algebra theorems

Also document general C#→Lean conventions for the project.

🔬 Lean Squad — automated FV correspondence review.

Fixes#7851

[Copilot]

Pull request overview

Adds detailed Lean 4 ↔ C# correspondence documentation for the three primary formal-verification targets (ArgumentArity, CommandLineParser.TryUnescape, TreeNodeFilter.MatchFilterPattern), plus a set of general modelling conventions to standardize future specs.

Changes:

• Documented C#→Lean construct mappings, deliberate approximations, exclusions, and open questions for ArgumentArity.
• Documented a simplified Lean-facing spec signature and behavioural notes for CommandLineParser.TryUnescape, including the sequential escape replacement model.
• Outlined a planned inductive Lean model for TreeNodeFilter.MatchFilterPattern and enumerated intended Boolean-algebra theorems.

Show a summary per file

File	Description
formal-verification/CORRESPONDENCE.md	Adds correspondence mappings and modelling conventions for the three primary FV targets.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2