The release-harness merge taught --resume to keep multi-token slash commands together, but that also misclassified absolute session paths as slash commands. This follow-up keeps the latest-session shortcut for real slash commands while still treating absolute and relative filesystem paths as explicit resume targets, which restores the new integration test and the intended resume flow.
Constraint: --resume must accept both implicit latest-session shortcuts and absolute filesystem paths
Rejected: Require --resume latest for all slash-command-only invocations | breaks the new shortcut UX merged from 9103/9202
Confidence: high
Scope-risk: narrow
Directive: Distinguish slash commands with looks_like_slash_command_token before assuming a leading slash means latest-session shorthand
Tested: cargo build -p rusty-claude-cli; cargo test -p rusty-claude-cli
Not-tested: Non-UTF8 session path handling
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