Function is_path_shaped

atomic-cli/src/commands/intent/validate.rs:112–114

Is the argument *shaped* like a filesystem path (rather than an intent ID)? True when it ends in `.md` or contains a path separator. We decide path-vs-ID on shape, not existence, so a mistyped `./plan.md` is reported as a missing file (FileNotFound) instead of misleadingly falling through to "invalid ID". Intent IDs are `PREFIX-N` / `N` — no `.md` suffix, no separator.

(arg: &str)

/// file (FileNotFound) instead of misleadingly falling through to "invalid ID".
/// Intent IDs are `PREFIX-N` / `N` — no `.md` suffix, no separator.
fn is_path_shaped(arg: &str) -> bool {
    arg.ends_with(".md") || arg.contains('/') || arg.contains(std::path::MAIN_SEPARATOR)
}

/// Resolve `urn:atomic:change:<hash>` evidence URNs against the change store at
/// `repo_root`. One violation per URN that does not resolve. With no repository