This replaces the single default pricing assumption with a small model-aware pricing table for Sonnet, Opus, and Haiku so CLI usage output better matches the selected model. Unknown models still fall back cleanly with explicit labeling.
The change keeps pricing lightweight and local while improving the usefulness of usage/cost reporting for resumed sessions and live turns.
Constraint: Keep pricing local and dependency-free
Constraint: Preserve graceful fallback behavior for unknown model IDs
Rejected: Add a remote pricing source now | unnecessary coupling and risk for this slice
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: If pricing tables expand later, prefer explicit model-family matching and keep fallback labeling visible
Tested: cargo fmt; cargo clippy --all-targets --all-features -- -D warnings; cargo test -q
Not-tested: Validation against live provider billing exports
This adds token and estimated cost reporting to runtime usage tracking and surfaces it in the CLI status and turn output. It also upgrades compaction summaries so users see a clearer resumable summary and token savings after /compact.
The verification path required cleaning existing workspace clippy and test friction in adjacent crates so cargo fmt, cargo clippy -D warnings, and cargo test succeed from the Rust workspace root in this repo state.
Constraint: Keep the change incremental and user-visible without a large CLI rewrite
Constraint: Verification must pass with cargo fmt, cargo clippy --all-targets --all-features -- -D warnings, and cargo test
Rejected: Implement a full model-pricing table now | would add more surface area than needed for this first UX slice
Confidence: high
Scope-risk: moderate
Reversibility: clean
Directive: If pricing becomes model-specific later, keep the current estimate labeling explicit rather than implying exact billing
Tested: cargo fmt; cargo clippy --all-targets --all-features -- -D warnings; cargo test -q
Not-tested: Live Anthropic API interaction and real streaming terminal sessions
