[Finesssee]

Summary

Ports upstream CodexBar steipete#3209 (Cowork audit transcripts in Claude cost history) to Windows. Upstream steipete#4598, its 0.79 follow-up steipete#4667, and steipete#4617 are reviewed and not ported: they change a persisted Claude cost cache that Windows does not have.

• Cowork audit files are cost inputs. Claude Desktop cost discovery admits local-agent-mode-sessions/**/audit.jsonl regular files, beside the Desktop project stores. Symbolic links are never followed. Live-session discovery output is unchanged.
• Windows Desktop folders. Discovery searches %APPDATA%\Claude and each Microsoft Store (MSIX) package store, reusing the existing msix_store_dirs helper from the browser module.
• Default history only. Desktop roots are added only when CLAUDE_CONFIG_DIR is unset or blank and no token account is mapped. This mirrors upstream costProjectsRoots.
• Parser unchanged. Cowork rows go through the existing CLI transcript parser. A response present in both a CLI transcript and a Cowork audit is counted once. result rows, which hold session totals, are never counted.
• Bounded discovery. A cost discovery pass stops at 16,384 directory entries or 5 seconds. It has its own budget, so it cannot starve live session listing. A stopped walk adds one read failure to the Claude root, so the cost estimate stays unavailable instead of showing a partial total.
• File roots. A .jsonl root is read directly. Any other file root counts as unreadable.
• docs/PROVIDERS.md gains a Claude local cost history section.

Windows differences and not ported

• Claude cost cache scales with transcript *file count*: a 51k-file ~/.claude/projects gives a ~650 MB floor, ~1.2 GB bursts every 15–20 min, and daily disk-write reports (0.74–0.76) steipete/CodexBar#4598 / perf(claude): lower peak memory during incremental cache refreshes steipete/CodexBar#4667 (incremental shard persistence and memory): not ported. Windows has no persisted Claude cost cache. cost_scanner.rs documents that Claude has no persisted cost-report cache on Windows, and token_activity.rs keeps results only in an in-memory timed memo. Adding one would be new cache infrastructure, not a port, so no cache version or atomic cache write was added.
• fix(claude): fail cost scans when source roots are unreadable steipete/CodexBar#4617 (keep the last valid cache on unreadable roots): not ported for the same reason. There is no cache to keep. The read-failure path already keeps coverage unavailable when a root cannot be read.
• Vertex cost history: Windows has a Vertex provider and excludes Vertex rows from Anthropic pricing. It has no separate Vertex cost-history cache, so there is nothing to port.
• Pi and OMP roots, claude-swap homes, and account mapping: unchanged.

Commands run

• cargo fmt --all -- --check: clean
• cargo clippy --manifest-path rust/Cargo.toml --all-targets -- -D warnings: clean
• cargo clippy --manifest-path apps/desktop-tauri/src-tauri/Cargo.toml --all-targets -- -D warnings: clean
• cargo test --manifest-path rust/Cargo.toml: 5093 passed, 0 failed, 2 ignored
• Focused: cost_scanner:: 243 passed; agent_sessions:: 64 passed; claude_cowork 1 passed (child-process fixtures, default and CLAUDE_CONFIG_DIR cases)
• cargo test --manifest-path apps/desktop-tauri/src-tauri/Cargo.toml: 755 passed, 0 failed

Test coverage for the change:

• claude_cowork: Cowork dedupe against CLI transcripts, result rows ignored, chart and daily totals match the summary, a mapped token account excludes Cowork, and a set CLAUDE_CONFIG_DIR excludes Cowork.
• agent_sessions::tests: cost discovery admits audit files, live discovery stays project-only, and an expired clock or an exhausted entry cap reports incomplete.
• cost_scanner::claude_roots: merging Desktop roots de-duplicates by resolved path, an incomplete walk is a read failure, and only an unset or blank config dir takes Desktop roots.

No UI proof: no frontend file changed, and the change is backend-only. Discovery of real Desktop folders was not exercised on a machine with a live Cowork install; the tests use temp directories through injected application-data roots.

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📥 Commits

Reviewing files that changed from the base of the PR and between e26e4d9 and 1a57f27.

📒 Files selected for processing: 11

• docs/PROVIDERS.md
• rust/src/agent_sessions.rs
• rust/src/agent_sessions/claude_desktop.rs
• rust/src/agent_sessions/pi_family/roots.rs
• rust/src/agent_sessions/tests.rs
• rust/src/browser/claude_desktop.rs
• rust/src/browser/mod.rs
• rust/src/cost_scanner.rs
• rust/src/cost_scanner/claude_roots.rs
• rust/src/cost_scanner/tests.rs
• rust/src/cost_scanner/tests/claude_cowork.rs

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