This adds a dedicated session inspect command to the Rust CLI so users can inspect a saved session's path, timestamps, size, token totals, preview text, and latest user/assistant context without opening the underlying file by hand.
It builds directly on the new session list/resume flows and keeps the UX lightweight and script-friendly.
Constraint: Keep session inspection CLI-native and read-only
Constraint: Reuse the existing saved-session format instead of introducing a secondary index format
Rejected: Add an interactive session browser now | more overhead than needed for this inspect slice
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep session inspection output stable and grep-friendly so it remains useful in scripts
Tested: cargo fmt; cargo clippy --all-targets --all-features -- -D warnings; cargo test -q
Not-tested: Manual inspection against a large corpus of real saved sessions
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