This adds a prompt-mode permission flow for the Rust CLI, surfaces permission policy details in the REPL, and improves tool output rendering with concise human-readable summaries before the raw JSON payload.
The goal is to make tool execution feel safer and more legible without changing the underlying runtime loop or adding a heavyweight UI layer.
Constraint: Keep the permission UX terminal-native and incremental
Constraint: Preserve existing allow and read-only behavior while adding prompt mode
Rejected: Build a full-screen interactive approval UI now | unnecessary complexity for this parity slice
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep raw tool JSON available even when adding richer summaries so debugging fidelity remains intact
Tested: cargo fmt; cargo clippy --all-targets --all-features -- -D warnings; cargo test -q
Not-tested: Manual prompt-mode approvals against live API-driven tool calls
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