Changelog

Version: 4.7.01302
  Bugfixes:
    - Preserve unambiguous native science sources and their unlock gates when acyclic transitive factory dependencies are unknown.
    - Keep strict diagnostics, missing-source rejection and cyclic-reference rejection; never remove selected cryogenic science to suppress startup errors.
  Info:
    - Target package from source 4.7.2.
    - Retain the published 4.7.1 changelog and earlier history.
    - Require Factorio 0.13.20 or newer in this target line.

Version: 4.7.01301
  Bugfixes:
    - Match foreign infinite technology effects before qualifying their science; retain qualification of matching owners.
    - Bind independently seeded replacement recipes for declared named science sources when the named recipe is absent.
    - Distinguish missing science unlocks from rejected unlock candidates and retain their rejection reasons.
  Info:
    - Target package from source 4.7.1.
    - Retain the published 4.7.0 changelog and earlier history.
    - Require Factorio 0.13.20 or newer in this target line.

Version: 4.7.01300
  Info:
    - Target package from source 4.7.0.
    - Retain the exact published 4.6 entry and earlier history for this target.
    - Require Factorio 0.13.20 or newer in this target line, matching declared package metadata.

Version: 4.6.01300
  Info:
    - Target package from source 4.6.0.
    - Restore the published 4.3, 4.4 and 4.5 changelog entries alongside the retained earlier history.
    - Retain the research, settings, cap and save-continuity repairs included in source 4.5.2.
    - Require Factorio 0.13.20 or newer in this target line, matching the accepted exact-engine tests.

Version: 4.5.01302
  Info:
    - Target package from source 4.5.2.
  Bugfixes:
    - Accept independently validated alternative science unlocks, including moved Promethium and electromagnetic unlocks.
    - Keep circular or unavailable owners from replacing the valid science source or removing required packs.
    - Preserve numeric research costs consistently through planning and design validation on Factorio 0.13 and 0.14.
  Performance:
    - Reuse final journal and public-artifact representation preparation without changing generated research.
    - Bind each prepared design once after effect sanitation.
    - Use the common qualifier while retaining target-specific science diagnostics.

Version: 4.5.01301
  Info:
    - Target package from source 4.5.1.
  Bugfixes:
    - Preserve native Promethium science binding and validated direct science alternatives.

Version: 4.5.01300
  Info:
    - Target package from source 4.5.0.
  Bugfixes:
    - Repair the reported modules prerequisite on disabled Angel silver research without ignoring other prerequisites.
  Performance:
    - Avoid preparing unused provider diagnostics and copying detailed publication evidence during normal startup.
    - Reuse prepared graph nodes and avoid an unnecessary ordinary-table sort.

Version: 4.4.01302
  Info:
    - Target package from source 4.4.2.
  Performance:
    - Reuse lab acceptance data and approved bindings within each compilation.
    - Avoid copying the public compiler snapshot solely to measure its serialized size.
  Changes:
    - Remove the obsolete Classic notice module and its inactive lifecycle hooks.

Version: 4.4.01301
  Info:
    - Target package from source 4.4.1.
  Fixes:
    - Prevent multiplayer join failures caused by a load-only on_tick event registration.

Version: 4.4.01300
  Info:
    - Target package from source 4.4.0.

Version: 4.3.01300
  Info:
    - Target package from source 4.3.0.

Version: 4.2.01302

  Changes:

    - Update the Factorio 0.13 distribution identity and package guidance for source 4.2.2.
    - Preserve the reduced target research and settings surface.
    - Continue eligible base research after a finite numeric upstream level range from its
      actual terminal technology, preserving the finite chain and true-infinite ownership checks.
    - Research Library host adapters remain disabled on this target; this package does not enable a backport.

  Info:

    - Use 4.2.01302 for source 4.2.2. The final 02 identifies the source patch, not a packaging retry.
    - Preserve original saves before upgrading from the published 4.2.1 package for the same Factorio target.

Version: 4.2.01301

  Changes:

    - Update the Factorio 0.13 distribution identity and package guidance for source 4.2.1.
    - Preserve the reduced target research and settings surface; modern-only features remain excluded.
    - Research Library backports are not included in this package.
    - Recognize the historical player prototype when checking handcraftable laboratory and science acquisition routes.
    - Select the native historical science-pack names for default research and official science progression.
    - Emit the singular technology icon field required by this engine, preserving the selected base artwork.
    - Withhold robot-battery research because this engine does not support its native modifier.

  Info:

    - Use 4.2.01301 for source 4.2.1. The final 01 identifies the source patch, not a packaging retry.
    - Preserve original saves before upgrading from the published 4.2.0 package for the same Factorio target.

Version: 4.2.01300

  Playtest:

    - Materialized a Factorio 0.13 private historical adapter from current MIR 4.2 source.
    - Applied the target-native old-science and unsupported-effect dispositions discovered by exact-engine loading.
    - Kept Factorio-2-only research-cost support output out of this historical target.

  Status:

    - Private historical playtest package. It is not a public compatibility claim or release asset.