# Phase 121: BibTeX Contract - Context

**Gathered:** 2026-04-11
**Status:** Implemented and verified
**Mode:** First implementation phase for `v1.63`

<domain>
## Phase Boundary

Lock the bounded BibTeX import/export contract for backlog `999.26` through
failing helper, service, CLI, E2E, and documentation tests.

</domain>

<decisions>
## Implementation Decisions

### Locked decisions

- do not reopen citation traversal behavior that is already implemented
- keep BibTeX behavior in an extracted helper module, not in facade hotspots
- require one export path and one import path before `999.26` can close

</decisions>

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*Phase: 121-bibtex-contract*
*Context captured on 2026-04-11 after Phase 121 implementation and verification*
