feat: fix --breakdown broken flag

[IXackerr]

Summary

• The --breakdown flag was silently ignored in the multi-agent ("all") table — it only showed per-agent rows (Claude, Kilo, etc.) but never per-model cost/token breakdowns
• Per-model breakdowns now render under each agent row when --breakdown is passed: Date → All → - Claude → - opus-4-6 / - haiku-4-5
• Model breakdown data is included in --json output via modelBreakdowns on each row
• Codex adapter also gets per-model breakdowns from its CodexGroup.models map

Root cause

When the Rust CLI replaced the TypeScript implementation, AllRow was introduced without a model_breakdowns field. summary_rows() discarded UsageSummary.model_breakdowns during conversion, and print_table() never checked shared.breakdown.

Test plan

• ccusage --breakdown shows per-model rows with tokens and cost under each agent
• ccusage (no flag) output is unchanged
• ccusage --breakdown --json includes modelBreakdowns array per row
• All 177 existing tests pass (2 pre-existing platform-specific failures unrelated)

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Summary by cubic

Fixes the --breakdown flag in ccusage so per-model token and cost breakdowns appear under each agent and in the aggregated “all” row. Also includes these breakdowns in --json output and adds Codex per-model breakdowns.

• Bug Fixes
  • Added model_breakdowns to AllRow, aggregated across agents, sorted by cost, and rendered when --breakdown is set.
  • Included modelBreakdowns in --json output for each row.
  • Codex now reports per-model breakdowns from CodexGroup.models and uses calculate_codex_model_cost.
  • Output without the flag is unchanged.

^{Written for commit 0e5c4e7. Summary will update on new commits. Review in cubic}

Summary by CodeRabbit

• New Features
  • Usage reports now include per-model cost breakdowns.
  • JSON output now displays model breakdown information for each row.
  • Table display now renders model-level breakdown rows when breakdown mode is enabled.

[github-actions]

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[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4c81b19c-9928-4aa1-9d13-d748a6e582e5

📥 Commits

Reviewing files that changed from the base of the PR and between 8378395 and 0e5c4e7.

📒 Files selected for processing (2)

• rust/crates/ccusage/src/adapter/all.rs
• rust/crates/ccusage/src/adapter/codex.rs

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📝 Walkthrough

Walkthrough

This PR extends the usage-report data model to include per-model cost breakdowns. Codex row generation builds sorted ModelBreakdown entries per model; aggregation merges breakdowns across rows by model name; JSON and table output conditionally render the breakdowns when breakdown mode is enabled.

Changes

Per-Model Cost Breakdowns

Layer / File(s)	Summary
Data model extension for model breakdowns rust/crates/ccusage/src/adapter/all.rs (imports, struct, summary_rows)	AllRow struct gains a model_breakdowns field; imports are updated for ModelBreakdown types; summary_rows populates breakdowns from UsageSummary.
Codex breakdown generation and cost helper refactor rust/crates/ccusage/src/adapter/all.rs (codex_group_row), rust/crates/ccusage/src/adapter/codex.rs	codex_group_row constructs per-model breakdowns with non-cached input token computation and sorts by descending total cost; cost helper renamed to calculate_codex_model_cost, exposed as pub(crate), and integrated into group-cost mapping.
Aggregation of breakdowns across rows rust/crates/ccusage/src/adapter/all.rs (AllAccumulator, aggregate helper)	New aggregate_model_breakdowns helper merges ModelBreakdown entries by model name, summing token and cost fields; aggregated results are sorted and embedded into the "all" row.
Output rendering for model breakdowns rust/crates/ccusage/src/adapter/all.rs (row_json, print_table, push_model_breakdown_rows)	JSON output includes modelBreakdowns field; table rendering conditionally displays breakdown rows via new push_model_breakdown_rows helper when breakdown mode is enabled, supporting both agent and direct model breakdowns.
Test fixture updates for model breakdowns rust/crates/ccusage/src/adapter/all.rs (test literals), rust/crates/ccusage/src/adapter/codex.rs (test calls)	All test AllRow literals populated with model_breakdowns: Vec::new(); Codex cost helper test calls updated to use renamed calculate_codex_model_cost function.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• ryoppippi/ccusage#1067: New AllRow/modelBreakdowns generation directly depends on Codex "non-cached" inputTokens semantics introduced in that PR.
• ryoppippi/ccusage#1061: This PR's Codex cost helper rename and Speed::Fast pricing test updates overlap with that PR's Codex fast pricing behavior.
• ryoppippi/ccusage#1028: Both PRs modify adapter/all.rs; this PR's per-model aggregation feeds into the unified "all" row wired by that PR.

Suggested labels

enhancement

Suggested reviewers

• ryoppippi

Poem

🐰 A thousand models now find their place,
Breaking down costs with grace and space,
Aggregated, sorted, rendered clean—
Per-model clarity, no cache unseen!
The report now whispers what once was loud. ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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