Document new MCP tools in sx-tools page and CLAUDE.md

- Add Debugging & analysis section to tool catalogue (sx_trace, sx_deps,
  sx_build_manifest)
- Update harness entry to mention multi-file and setup support
- Update tool count from 35+ to 40+
- Add tool table to CLAUDE.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -102,7 +102,7 @@ Read the error carefully. Fragment errors give the parse failure in the new sour
 
 | Tool | Purpose |
 |------|---------|
-| `sx_harness_eval` | Evaluate SX in a sandboxed harness with mock IO. Returns result + IO trace. Params: `expr`, optional `mock` (SX dict of overrides), optional `file` (load definitions) |
+| `sx_harness_eval` | Evaluate SX in a sandboxed harness with mock IO. Returns result + IO trace. Params: `expr`, optional `mock`, `file`, `files` (array), `setup` (SX expr run before eval) |
 
 **Analysis:**
 
@@ -112,6 +112,14 @@ Read the error carefully. Fragment errors give the parse failure in the new sour
 | `sx_doc_gen` | Generate component docs from signatures across a directory |
 | `sx_playwright` | Run Playwright browser tests for the SX docs site |
 
+**Debugging & analysis:**
+
+| Tool | Purpose |
+|------|---------|
+| `sx_trace` | Step-through CEK evaluation showing symbol lookups, function calls, returns. Params: `expr`, optional `file`, `max_steps` |
+| `sx_deps` | Dependency analysis — shows all free symbols in a component and where they're defined. Params: `file`, optional `name`, `dir` |
+| `sx_build_manifest` | Show build contents: adapters, spec modules, primitives. Params: optional `target` ("js" or "ocaml") |
+
 ## Deployment
 
 - **Do NOT push** until explicitly told to. Pushes reload code to dev automatically.