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-0007-lsp-hover-surface.md

@@ -0,0 +1,39 @@
+---
+id: SLICE-0007
+type: slice
+status: ready
+parent: NS-0002
+title: Complete hover help for documented hemplate facts
+refs:
+  - REQUIREMENTS.md
+  - docs/editor-support.md
+  - docs/hemplate-syntax.md
+  - hemx-lsp/src/main.rs
+---
+
+## Objective
+
+Make hover explain the real `.heml` facts that contributors see in templates without turning hover into a tutorial or alternative spec.
+
+## Authority
+
+`docs/hemplate-syntax.md` defines the facts; `REQUIREMENTS.md` `diagnostics/007` and `diagnostics/008` constrain hover and editor behavior.
+
+## Close when
+
+- Hover covers escaped/trusted text, dynamic attributes, control-flow directives, generated targets, forms, handles, roots, and keyed slots.
+- Hover content is short and points back to the documented syntax authority.
+- Hover tests assert range-sensitive behavior and no hover for unrelated HTML text where normal editor tooling owns the answer.
+
+## Verification
+
+- `cargo test -p hemx-lsp`
+
+## Non-goals
+
+- Do not duplicate `docs/hemplate-syntax.md` wholesale in source strings.
+- Do not include provider-specific Markdown rendering assumptions.
+
+## Evidence
+
+`hemx-lsp/src/main.rs` already exposes `hoverProvider` and `hemplate_hover` anchors.