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prometeu-studio/discussion/workflow/plans/PLN-0086-rgba8888-final-integration-and-residue-removal.md

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id ticket title status created completed ref_decisions tags
PLN-0086 studio-packer-rgba8888-asset-pipeline RGBA8888 Final Integration and Residue Removal review 2026-05-23
DEC-0037
integration
validation
residue-removal
rgba8888

Objective

Run final integration checks and remove normal-path RGB565 residue after the spec, model, emission, projection, and test plans are implemented.

Background

DEC-0037 prohibits RGB565 compatibility mode, normal convertedRgb565 projection, magenta color-key behavior, reserved palette index 0, and partial alpha flattening. Final validation must prove that the repository implements those constraints coherently.

Scope

Included

  • Repository-wide residue audit.
  • Full relevant Gradle test execution.
  • Discussion workflow validation.
  • Final implementation notes for follow-up plan or lesson creation.

Excluded

  • New feature design.
  • Runtime repository changes.
  • Variable palette-count work in DSC-0005.
  • Manual regeneration of main and fragments.

Execution Steps

Step 1 - Run focused residue searches

What: Find stale RGB565 palette-contract residue.

How: Search production specs/code/tests/fixtures for: convertedRgb565, originalArgb8888, RGB565, rgb565, COLOR_KEY, magenta, 2048, indices 1..15, and partial-alpha flattening text. Classify each match as removed, historical discussion-only, or out-of-scope.

File(s):

  • docs/specs/packer/**
  • docs/specs/studio/**
  • prometeu-packer/**

Step 2 - Run packer tests

What: Execute the packer test suite.

How: Run the Gradle test task that covers prometeu-packer-v1 and related API modules.

File(s):

  • Gradle modules under prometeu-packer

Step 3 - Run broader build validation

What: Verify Studio build integration still compiles.

How: Run the repository's standard build or the narrowest existing Gradle task that compiles Studio plus packer consumers.

File(s):

  • Root Gradle project
  • prometeu-app
  • prometeu-packer

Step 4 - Validate discussion workflow

What: Ensure discussion artifacts remain consistent.

How: Run discussion validate after implementation and before any housekeeping.

File(s):

  • discussion/index.ndjson
  • discussion/workflow/**

Step 5 - Record remaining intentional residue

What: Document any allowed remaining RGB565 references.

How: If matches remain only in historical discussions, runtime references, or explicit future migration notes, list them in the implementation summary so housekeeping and lesson work can distinguish intentional context from missed normal-path behavior.

File(s):

  • Implementation summary or future lesson, after code work is complete.

Test Requirements

Unit Tests

  • Packer unit tests must pass.

Integration Tests

  • Packer workspace build/materialization tests must pass.
  • Studio compile/build validation must pass.

Manual Verification

  • Residue search results must contain no normal-path convertedRgb565, RGB565 glyph palette payload, magenta color-key, reserved index 0, or partial-alpha flattening behavior.

Acceptance Criteria

  • discussion validate passes.
  • Packer tests pass.
  • Studio/packer build validation passes.
  • Normal specs/code/tests/fixtures contain no stale RGB565 glyph-palette contract residue.
  • Remaining stale-looking matches, if any, are documented as historical or explicitly out of scope.
  • DSC-0005 remains untouched except by explicit future work.

Dependencies

  • Depends on PLN-0081 through PLN-0085.

Risks

  • A broad residue search may include historical discussions and cause false positives.
  • Generated project cache files may change during tests; those changes must be reviewed separately from source edits.