docs(work): map testing and editor northstars

Add repo-local northstars and ready slices for testing strategy, LSP/editor completion, and hemplate highlighting boundaries.

work/slices/SLICE-0011-highlight-fixtures.md

@@ -0,0 +1,39 @@
+---
+id: SLICE-0011
+type: slice
+status: ready
+parent: NS-0003
+title: Add hemplate highlighting fixtures and query tests
+refs:
+  - docs/hemplate-syntax.md
+  - docs/editor-support.md
+  - REQUIREMENTS.md
+---
+
+## Objective
+
+Create repo-owned highlighting fixtures that prove documented hemplate syntax receives stable captures while ordinary HTML remains handled by existing HTML tooling.
+
+## Authority
+
+`docs/hemplate-syntax.md` is the syntax authority; `docs/editor-support.md` says highlighting is HTML first with hemx overlays.
+
+## Close when
+
+- Fixtures cover text insertion, trusted HTML insertion, dynamic attributes, `h-if`, `h-for`, `h-key`, `h-match`, `h-case`, `data-hemx-root`, `data-hemx-slot`, `data-hemx-form`, and `data-hemx-handle`.
+- Tests or golden outputs verify capture names for those tokens.
+- The test path is repo-owned and does not require publishing a VS Code/Cursor/Neovim package.
+
+## Verification
+
+- Preferred future command: a repo-owned tree-sitter/query fixture test, once the crate/tool location is chosen.
+- Until then, manual proof must name the exact editor/query runner and fixture.
+
+## Non-goals
+
+- Do not parse Rust expressions inside `{+ +}` beyond highlighting delimiters/expression region.
+- Do not make highlights responsible for diagnostics or completion.
+
+## Evidence
+
+The fixture list maps directly to the documented syntax surface.