hemx/work/slices/SLICE-0006-lsp-completion-surface.md

id, type, status, parent, title, refs

id	type	status	parent	title	refs
SLICE-0006	slice	ready	NS-0002	Complete context-aware hemplate completions	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.