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hemx/work/slices/SLICE-0006-lsp-completion-surface.md
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slhx agent df0fabd4fb docs(work): map testing and editor northstars
Add repo-local northstars and ready slices for testing strategy, LSP/editor completion, and hemplate highlighting boundaries.
2026-06-25 22:20:50 +02:00

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---
id: SLICE-0006
type: slice
status: ready
parent: NS-0002
title: Complete context-aware hemplate completions
refs:
- REQUIREMENTS.md
- docs/editor-support.md
- docs/hemplate-syntax.md
- hemx-lsp/src/main.rs
---
## Objective
Make completion useful for the real hemplate surface: directives, dynamic attributes, and `data-hemx-*` facts should complete in context without inventing syntax.
## Authority
`docs/hemplate-syntax.md` defines the public syntax; `docs/editor-support.md` and `REQUIREMENTS.md` `diagnostics/006` require completions to support that surface while remaining subordinate to build validation.
## Close when
- Completion items cover `h-if`, `h-for`, `h-key`, `h-match`, `h-case`, `{+ +}`, `{+= =+}`, `+attr`, and known `data-hemx-*` authoring facts.
- Tests prove context filters: directive completions in tag attributes, snippet/text completions in text positions, and no irrelevant completions inside quoted Rust expressions.
- Completion docs/details point to the existing syntax docs rather than new invented rules.
## Verification
- `cargo test -p hemx-lsp`
- Manual check if needed: request `textDocument/completion` against a fixture through the LSP test harness.
## Non-goals
- Do not add Rust type inference or project-wide symbol completion in this slice.
- Do not make completion acceptance a build authority.
## Evidence
`hemx-lsp/src/main.rs` already exposes `completionProvider` and `hemplate_completion_items` anchors.