Check Script Class Contracts

Audit all Python scripts in scripts/*.py and validate that script class overrides and UI-to-execution parameter contracts are correct.

When To Use

• New or changed files were added under scripts/*.py
• A script crashes when selected or executed from UI
• A script UI was changed and runtime args no longer match
• You want a pre-PR quality gate for script API compatibility

Guidance

• Consult .github/instructions/core.instructions.md for relevant core runtime guidance before proceeding.

Scope

Primary audit scope:

• scripts/*.py

Contract references:

• modules/scripts_manager.py (Script base class contracts for title, show, ui, run, process)
• modules/scripts_postprocessing.py (ScriptPostprocessing contracts for ui and process)

Required Checks

A. Standard Overrides: __init__, title, show

For each class in scripts/*.py that subclasses scripts.Script or scripts_manager.Script:

1. title:

• method exists
• callable signature is valid
• returns non-empty string value

2. show:

• method exists
• signature is compatible with script runner usage (show(is_img2img) or permissive *args/**kwargs)
• return behavior is compatible (bool or scripts.AlwaysVisible / equivalent)

3. __init__ (if overridden):

• does not require mandatory constructor args that would break loader instantiation
• avoids side effects that require runtime-only globals at import time
• leaves class in a usable state before ui()/run()/process() are called

Notes:

• __init__ is optional; do not fail scripts that rely on inherited constructor.
• For dynamic patterns, flag as warning with rationale instead of hard fail.

B. ui() Output vs run()/process() Parameters

For each script class:

1. Determine execution target:

• Prefer run() if present for generation scripts
• Use process() if present and run() is absent or script is postprocessing-oriented

2. Compare ui() output shape to target method parameter expectations:

• ui() list/tuple output count should match target positional argument capacity after the first processing arg (p or pp), unless target uses *args
• if target is strict positional (no *args/**kwargs), detect missing/extra UI values
• if target uses keyword-driven processing, ensure UI dict keys map to accepted params or **kwargs

3. Validate ordering assumptions:

• UI control order should align with positional parameter order when positional binding is used
• detect obvious drift when new UI control was added but method signature was not updated

4. Validate optionality/defaults:

• required target parameters should be satisfiable by UI outputs
• defaulted target params are acceptable even if UI omits them

C. Runner Compatibility

Confirm script methods align with runner expectations in modules/scripts_manager.py:

• ui() return type is compatible with runner collection (list/tuple or recognized mapping pattern where used)
• run()/process() receive args in expected form from runner slices
• no obvious mismatch between args_from/args_to assumptions and script method arity

For postprocessing-style scripts in scripts/*.py:

• verify compatibility with modules/scripts_postprocessing.py conventions (ui() list/dict, process(pp, *args, **kwargs))

Procedure

1. Enumerate all classes in scripts/*.py and classify by base class type.
2. For each generation script class, validate title, show, optional __init__, and ui -> run/process contracts.
3. For each postprocessing script class under scripts/*.py, validate ui -> process mapping semantics.
4. Cross-check ambiguous cases against script runner behavior from modules/scripts_manager.py and modules/scripts_postprocessing.py.
5. Report concrete mismatches with minimal fixes.

Reporting Format

Return findings by severity:

1. Blocking script contract failures
2. Runtime- likely arg/arity mismatches
3. Signature/type compatibility warnings
4. Style/consistency improvements

For each finding include:

• script file
• class name
• failing contract area (init, title, show, ui->run, ui->process)
• mismatch summary
• minimal fix

Also include summary counts:

• total scripts/*.py files checked
• total script classes checked
• classes with run contract checked
• classes with process contract checked
• override issues found (init/title/show)

Pass Criteria

A full pass requires all of the following across audited scripts/*.py classes:

• title and show overrides are valid and runner-compatible for generation scripts
• overridden __init__ methods are safely instantiable
• ui() output contracts are compatible with run() or process() args
• no blocking arity/signature mismatch remains

If a class uses runtime-determined argument mapping or dynamic method dispatch that cannot be proven statically, mark as conditional pass with explicit runtime validation recommendation.