Add AI-native game studio maturity scorecard (Issue #69)

[YvesAlbuquerque]

Linked Issue

Closes #69

Implementation Plan Followed

Used issue #69 body as the implementation plan: goal, product context, proposed file, scoring categories, acceptance criteria, and validation checklist.

Summary of Changes

• Added a dedicated qualitative maturity rubric at docs/product/ai-native-game-studio-maturity-scorecard.md.
• Kept the scorecard focused on inspectable evidence instead of rankings or market-leadership claims.
• Reinforced provider neutrality, engine neutrality, owner approval gates, validation honesty, and Loomlight/YJackCore separation.
• Addressed external review readability feedback in commit 37b9228.

Files / Systems Affected

• docs/product/ai-native-game-studio-maturity-scorecard.md

Validation Run

• rg -n "\\bbest\\b|\\bleading\\b|\\bfirst\\b|\\bguaranteed\\b|benchmark" C:/tmp/issue69-scorecard.md
• Manual comparison against README.md, AGENTS.md, docs/product/public-messaging.md, docs/product/repo-positioning.md, docs/product/maintenance-and-scope.md, .agents/docs/tool-compatibility.md, and .agents/docs/autonomy-modes.md
• Remote branch/contents verification via GitHub API after commit
• Review-thread verification via GitHub GraphQL: all three Gemini review threads are resolved/outdated after commit 37b9228

Validation Not Run (and Why)

• git diff --check on a clean issue branch checkout was not runnable because this environment has unrelated local changes and local git ref/worktree writes are restricted. Remote branch verification was used instead.
• No runtime/build/test execution: this change is docs-only and adds no engine/runtime code.

Manual Validation Still Required

• Human review for tone and public positioning.
• Human review of whether the scorecard should be linked from README.md or other navigation surfaces in a follow-up.

Risks / Limitations

• The rubric is qualitative and intentionally not externally benchmarked.
• The document can drift if the repo's workflow contracts or positioning change and the scorecard is not kept in sync.
• The PR branch is currently behind main; reviewer should confirm whether GitHub can merge cleanly or whether branch update is required outside the dirty local checkout.

Review Focus Areas

• Whether the rubric is concrete enough to audit other systems without repo-specific assumptions.
• Whether the non-claims language is strong enough to prevent overclaiming.
• Whether the category evidence and weak-signal guidance matches current repo positioning.

Automation-Author: Codex
Automation-Type: Implementation
Model-Family: OpenAI
Review-Required: Non-Codex or human reviewer

[Copilot]

Pull request overview

Adds a new, qualitative “AI-native game studio maturity” scorecard intended as a self-audit rubric (not a market benchmark) that can be applied to YJackGameStudio and other workflows using inspectable evidence.

Changes:

• Introduces a 0–3 scoring rubric with usage guidance and explicit non-claims to avoid overstatement.
• Defines 12 audit categories (roles, workflows, neutrality, governance, validation honesty, release discipline, etc.) with “evidence to inspect” and “weak signals”.
• Links each category to relevant YJackGameStudio authority docs and artifact paths to support verifiable scoring.

[gemini-code-assist]

Code Review

This pull request introduces the 'AI-Native Game Studio Maturity Scorecard' document, which serves as a qualitative self-audit tool for evaluating AI-native game studio workflows across twelve distinct categories. The review feedback focuses on minor grammatical and readability enhancements, including correcting a subject-verb agreement mismatch, improving sentence flow by adding a missing verb, and using quotation marks to clearly distinguish status phrases.

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