Move the AST-based ReadOnlyHint scan introduced in #2486 out of
pkg/github's test file and into a new exported package, pkg/toolvalidation,
so downstream consumers (notably github/github-mcp-server-remote, which
uses this repo as a library) can apply the same guardrail to their own
tool registrations with a one-line test:
violations, err := toolvalidation.ScanReadOnlyHint(pkgDir)
Changes:
- New pkg/toolvalidation/readonlyhint.go with ScanReadOnlyHint,
FormatReadOnlyHintViolations, and the ReadOnlyHintViolation type.
- Dedicated unit tests for the scanner using in-memory fixtures
(compliant, missing-hint, missing-annotations, non-literal,
aliased import, positional fields, file without mcp import).
- pkg/github/tools_static_validation_test.go shrunk to a thin wrapper
that calls ScanReadOnlyHint against its own package directory; the
existing behavior for pkg/github is preserved.
No production-code, schema, or toolsnap changes.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Sam Morrow