docs(provenance): clarify approved Classic reuse

AGENTS.md

@@ -44,10 +44,18 @@
 
 ## Licensing, performance, and validation
 
-- New Rust/WGSL/tests/docs/fixtures are MIT. Do not add GPL/AGPL or adapt legacy
-  renderer implementation. Historical reuse follows local `PROVENANCE.md` and
-  canonical `atrinik/atrinik/docs/PROVENANCE.md`, failing closed on incomplete
-  or mixed evidence.
+- New Rust/WGSL/tests/docs/fixtures are MIT. Do not link, bundle, or depend on
+  GPL/AGPL source as MIT. Historical Classic destination reuse follows the
+  [local provenance record](PROVENANCE.md) and
+  [canonical grant registry](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md).
+  At an exact source revision, prove every copyrightable portion is separable,
+  within a recorded grant's past-contribution scope, and original work solely
+  authored by its grantor. Present-day blame, majority authorship, a later
+  edit, or an agent-assisted commit cannot fill a coverage gap. Admitted
+  material may be inspected as implementation reference, copied, adapted,
+  ported, translated, and MIT-relicensed in this destination. Record the exact
+  source, destination, transformation, and registry revision; uncovered
+  material fails closed. The Classic repository remains GPL-distributed.
 - Authored inputs retain exact licenses. Fixture/package manifests record
   source, author, license, digest, transformation, and notice. Shaders are
   executable renderer code authored/reviewed/versioned here, never delivered
@@ -71,6 +79,6 @@
   adapter/backend/driver/limits for GPU evidence; never imply absent GPU
   coverage passed.
 - Wrapper replacement adapters are not available yet. Use repository
-  validation and released consumer contracts, not source copies or classic
-  fallbacks. Commits/PR titles use Conventional Commits; semantic-release owns
-  coherent releases/tags.
+  validation and released consumer contracts, not unaudited source copies or
+  Classic runtime fallbacks. Commits/PR titles use Conventional Commits;
+  semantic-release owns coherent releases/tags.

CONTRIBUTING.md

@@ -2,12 +2,25 @@
 
 Direct human-written code contributions are welcome. The project currently
 develops software primarily through Codex-driven agentic workflows, but changes
-written by people or agents follow the same accountable review, clean-room,
-provenance, licensing, testing, and repository-validation requirements.
+written by people or agents follow the same accountable review,
+evidence-gated provenance, licensing, testing, and repository-validation
+requirements.
 
 Work from an issue and preserve the dependency boundaries in `AGENTS.md` and
 `policy/architecture.json`. New code, shaders, tests, and assets are MIT.
-Do not consult or copy classic renderer implementation or visual assets.
+Independent implementation is the default where exact reuse is not proven.
+Exact historical Classic material may be inspected or reused only when the
+[local provenance record](PROVENANCE.md) and
+[canonical grant registry](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md)
+admit every copyrightable portion at an exact source revision. Complete
+rename-aware history must prove each portion is original past work solely
+authored by its grantor; present-day blame, majority authorship, later edits,
+and agent-assisted commits are insufficient. An admitted destination may copy,
+adapt, port, translate, and MIT-relicense that material, but must not depend on
+the GPL Classic source. The destination grant does not change the Classic
+repository's GPL distribution. Record the exact evidence and exclude every
+uncovered portion. Visual assets remain separately licensed authored inputs and
+require their own exact provenance.
 
 Before opening a pull request, run:
 

PROVENANCE.md

@@ -1,8 +1,28 @@
 # Provenance review
 
-This repository is clean-room MIT work. No classic Atrinik renderer, client,
-editor, media, or content source was consulted or reused. Consequently no
-historical Atrinik provenance grant is applied.
+The current repository foundation is independently authored MIT work. No
+Classic Atrinik renderer, client, editor, media, or content source was consulted
+or reused for this revision. Consequently no historical Atrinik provenance
+grant is applied to it.
+
+Independent implementation remains the default where exact reuse is not
+proven. Before Classic source is inspected as implementation reference or
+reused, the
+[canonical grant registry](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md)
+requires an exact source revision and a complete, non-shallow, rename-aware
+audit. Every copyrightable portion of the selected separable material must fall
+within a grant's recorded past-contribution scope and be original work solely
+authored by that grantor. Present-day blame, majority authorship, a later edit,
+or an agent-assisted commit cannot establish missing historical coverage; the
+audit must also exclude copied, generated, vendored, embedded third-party, and
+conflicting-licensed origins.
+
+Only admitted material may be copied, adapted, ported, translated, and
+MIT-relicensed in this destination. Record the exact source, destination,
+transformation, third-party review, grantor, and canonical registry revision.
+Every uncovered portion is excluded. The destination grant neither changes the
+Classic repository's GPL distribution nor authorizes using its GPL source as a
+renderer build/runtime dependency.
 
 The only adapted implementation technique is the SDL3 raw-window-handle bridge
 identified in `THIRD_PARTY_NOTICES.md`. Its exact source is the MIT-licensed

README.md

@@ -9,14 +9,22 @@ bridge, UI seam, conformance corpus, and `atrinik-render` proof CLI.
 ## Development model
 
 This renderer is part of Atrinik's agentic next-generation reimplementation and
-improvement of the human-developed Classic presentation. It is fresh
-MIT-licensed Rust/wgpu code—not a mechanical C translation or source port—and
-is developed primarily through Codex-driven workflows under maintainer
-direction, review, provenance controls, tests, and repository validation.
+improvement of the human-developed Classic presentation. The current foundation
+is independently implemented MIT-licensed Rust/wgpu code rather than a
+mechanical C translation or source port, and is developed primarily through
+Codex-driven workflows under maintainer direction, review, provenance controls,
+tests, and repository validation.
 “Agentic” describes the project's primary current software-development
 workflow; it does not mean that every line or commit is agent-written. Direct
 human-written code contributions are welcome under the same controls.
 
+Future exact historical reuse is evidence-gated by the
+[local provenance record](PROVENANCE.md) and
+[canonical grant registry](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md):
+admitted destination material may be consulted and MIT-relicensed, while every
+uncovered portion remains excluded and the Classic repository remains
+GPL-distributed.
+
 The source art and world imagery displayed by the renderer are human-authored
 external inputs, not part of the renderer's MIT-licensed code. Atrinik's pixel
 art, graphics, animations, maps, and visual design retain exact creator,