Convert language-server positions using a declared encoding
Emoji before an error shifts the underline. Add position conversion matching the negotiated encoding.
- Focused work estimate
- 2h 15m + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Unicode · Source positions
Estimated field mix
- Compiler and language tooling100%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional config editor Hazel speaks a bounded subset of the Language Server Protocol through a local transport adapter. Use a tiny declared configuration grammar and synthetic documents.
Setup prerequisites
- Define the supported protocol subset and configuration grammar.
- Create synthetic open/change/close messages and workspace fixtures.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- ASCII positions map correctly
- Supplementary characters map correctly
- Out-of-range positions are rejected
Implementation constraints
- Do not assume byte offsets equal editor positions.
Verification to include
- Edit after emoji
- Request position beyond line end
Deliverables
- Position codec and Unicode cases
Rollout and recovery
Advertise only the verified encoding until others are implemented.
Value of the work
For the engineer: Practice protocol ordering and document-safe editing.
For the team: Inspect whether editor assistance preserves current user text and file boundaries.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.