[jacksteamdev]

Summary

Preserve three dated research investigations in one archive, with an index identifying their original commits and historical status.

docs/research/
├── README.md                         # dates, provenance, and interpretation
├── ordinary-chart-initialization.md  # calculation and host adapter contract
├── timezone-city-mapping.md          # mapping evidence and unresolved policies
└── lahiri-integration.md             # engine prerequisite investigation

Evidence

• Before: three research documents existed only on separate branches, absent from origin/main.
  After: all three are present; comparison against their original Git blobs confirms unchanged content apart from Markdown whitespace/table formatting.
• oxfmt --check docs/research and git diff --cached --check pass. Documentation only; no runtime tests run. Historical external claims were not revalidated.

Merge Danger

Door: two-way

Documentation can be reverted without changing runtime behavior.

Blast Radius: documentation

The index explicitly marks historical findings; engine and product acceptance still require current verification.

[claude]

Docs-only change (four research notes). One minor finding inline; nothing affecting runtime behavior.

[github-actions]

Review complete. Run log

Scope: incremental since 77cf7a011bb8e0c69280341cfdb61df66b6fdba3; commit: bb07c90a4a66e517ac187ceb1329b3e2dfd10dee.

[claude]

Incremental review of 77cf7a0..bb07c90: docs-only change that removes a machine-specific path from the research notes and updates the README note. No correctness or security issues found.