docs: define work-native continuity authority

[PatrickSys]

Summary

• define D64 for work-native continuity authority and bounded auto-gate foundations
• make the framework repo keep .work runtime state local-only while preserving consumer repo policy flexibility
• remove previously tracked .work runtime artifacts from source control

Verification

• npm test
• node tests/gsdd.guards.test.cjs
• node tests/gsdd.next.test.cjs
• node bin/gsdd.mjs health
• node bin/gsdd.mjs next --json
• npm pack --dry-run --json
• git diff --cached --check

[gemini-code-assist]

Code Review

This pull request establishes .work as the canonical, local-only continuity surface for gsdd next by adding .work/ to the root .gitignore and removing all previously tracked .work files (including milestone plans, roadmaps, phase packets, and research notes) from the repository. Additionally, it documents this architectural decision under 'D64 - Work-Native Continuity Authority' in distilled/DESIGN.md and distilled/EVIDENCE-INDEX.md, clarifying that .work holds active runtime state and should remain untracked in the framework repo, while legacy .planning files remain readable. There are no review comments, so I have no additional feedback to provide.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.