Harden M8 preflight foundation

CLAUDE.md

@@ -77,6 +77,12 @@ Tools are YAML configs with:
 - `arguments`: Custom flags with defaults (e.g., `--max` → `{max}`)
 - `steps`: Ordered list of `prompt`, `code`, or `tool` steps
 - `output`: Template for final output (e.g., `"{response}"`)
+- `input_schema`, `output_schema`: Optional tool-level JSON Schema contracts;
+  schemas are validated when tools are loaded or created
+
+Run `cmdforge inspect <tool> [--registry]` for the shared local preflight
+report. `cmdforge registry publish <path> --dry-run` runs local checks first
+and, when authenticated, the registry's publish-time checks without publishing.
 
 ### Step Types