feat: deepen shell command projection seam (#3445)

* feat: deepen shell command projection seam

* chore: add changeset for shell projection seam

* feat: centralize local and portable hook path projection

* docs: avoid prompt-scan false positive in installer migrations

* docs(adr): fix path-style token punctuation

docs/adr/0009-shell-command-projection-module.md

@@ -16,7 +16,7 @@ We propose introducing a Shell Command Projection Module that owns projection fr
   - generated shim / wrapper script text written to disk
 - Keep internal subprocess execution (`spawnSync`, `execFileSync`, SDK query dispatch) outside this seam. The module does **not** become a generic command runner.
 - Make runtime-specific wrappers explicit policy at the seam (for example, emit PowerShell call-operator prefixes only for shells/runtimes that require them).
-- Make path-style projection explicit policy at the seam (`native Windows`, `POSIX slash`, `$HOME`-relative`, project-dir-relative`, etc.).
+- Make path-style projection explicit policy at the seam (`native Windows`, `POSIX slash`, `$HOME`-relative, `project-dir-relative`, etc.).
 - Prefer typed IR outputs that tests can assert against directly, then render text at the final Adapter.
 
 ## Initial Scope

docs/adr/README.md

@@ -25,3 +25,6 @@ ADR 0005 is the top-level SDK seam index. It references per-seam ADRs and states
 ADR 0006 documents how SDK query handlers project planning paths (`cwd → effectiveRoot → .planning/<project>/...`). Cross-reference with the Planning Workspace Module (ADR 0004) for workstream pointer policy.
 
 ADR 0008 documents the Installer Migration Module for safe install-time moves, removals, config rewrites, and user-data preservation.
+
+ADR 0009 documents the Shell Command Projection Module seam for runtime-aware
+projection of installer-owned command text and projection IR.