#Codebase metrics
On this page
Size by crateChurn hotspotsLargest filesInside manager.rsProvider knowledge outside the provider crateAPI surfaceActivitySources: git ls-files, git log (90-day window ending at the snapshot commit), crates/jam-store/src/migrations.
Snapshot: commit 59f67f5d0 from 2026-09-29. Line counts include blank lines and comments. "Test" means test files, test kits, fixtures, stories, and Rust #[cfg(test)] items inside source files. The generated apps/desktop/src/lib/bindings.ts and the lock files are excluded from both line counts and churn.
| Measure | Value |
|---|---|
| Rust lines, production / test | 300,858 / 276,482 |
| TypeScript and JavaScript lines, production / test | 131,887 / 248,316 |
| Source files counted | 1,719 |
| Non-merge commits in the 90-day window | 2,891 |
Control methods / daemon routes / Tauri commands |
255 / 253 / 250 |
| SQLite tables / migrations | 76 / 88 |
| Daemon event kinds | 59 |
#Size by crate
Production and test lines per crate or app. The desktop UI and jam-manager hold the most production code, followed by jam-host.
| Crate or app | Production | Test | Files | Commits touching it |
|---|---|---|---|---|
| desktop UI | 129,818 | 135,428 | 1128 | 7,296 |
| jam-manager | 95,767 | 124,798 | 76 | 2,415 |
| desktop E2E | 0 | 110,852 | 229 | 1,970 |
| jam-host | 59,656 | 50,277 | 65 | 1,283 |
| jam (bins) | 26,800 | 22,968 | 22 | 657 |
| jam-store | 23,079 | 15,149 | 15 | 559 |
| jam-desktop (Tauri) | 19,057 | 10,309 | 37 | 513 |
| jam-domain | 17,545 | 9,254 | 40 | 513 |
| jam-transport-band | 7,969 | 12,137 | 17 | 271 |
| jam-daemon | 4,505 | 6,598 | 4 | 276 |
| jam-setup | 5,460 | 4,706 | 7 | 114 |
| jam-analytics | 4,895 | 3,573 | 20 | 116 |
| jam-core | 4,455 | 3,660 | 12 | 81 |
| jam-client | 5,223 | 2,321 | 2 | 177 |
| jam-contract | 7,205 | 293 | 6 | 219 |
| jam-ipc | 3,056 | 1,176 | 6 | 131 |
| plugin: copilot-jam-extension | 2,069 | 2,036 | 2 | 100 |
| jam-wire | 2,925 | 648 | 1 | 149 |
| jam-usage | 1,629 | 1,943 | 3 | 16 |
| jam-auth | 2,026 | 1,313 | 1 | 20 |
| jam-analytics-local | 1,653 | 1,173 | 1 | 16 |
| jam-service | 1,649 | 873 | 2 | 30 |
| jam-transport | 2,002 | 407 | 4 | 64 |
| jam-managed-config | 1,230 | 620 | 1 | 9 |
| jam-discovery | 847 | 223 | 2 | 25 |
| jam-secure-store | 554 | 359 | 1 | 10 |
| jam-update | 503 | 364 | 4 | 12 |
| jam-test-support | 0 | 799 | 2 | 20 |
| jam-tls | 435 | 339 | 2 | 11 |
| jam-windows-ipc | 408 | 141 | 2 | 20 |
| jam-version | 120 | 24 | 2 | 4 |
| jam-macos-notifications | 117 | 22 | 2 | 7 |
| jam-awake-clock | 88 | 15 | 1 | 4 |
"Commits touching it" counts file changes, so one commit that edits three files in a crate counts three times.
#Churn hotspots
Files ranked by production lines multiplied by the number of commits that changed them in the window. A large file that changes often is where a refactor pays off first and where merge conflicts concentrate.
| File | Production lines | Commits | Size × churn |
|---|---|---|---|
crates/jam-manager/src/manager.rs |
51,465 | 663 | 34,121,295 |
bins/jam/src/main.rs |
17,013 | 296 | 5,035,848 |
crates/jam-host/src/codex/app_server.rs |
10,034 | 246 | 2,468,364 |
crates/jam-store/src/sqlite.rs |
13,130 | 154 | 2,022,020 |
crates/jam-contract/src/lib.rs |
6,054 | 188 | 1,138,152 |
apps/desktop/src/App.tsx |
5,116 | 212 | 1,084,592 |
apps/desktop/src/stores/daemon.ts |
7,555 | 134 | 1,012,370 |
crates/jam-host/src/sandbox.rs |
11,067 | 82 | 907,494 |
crates/jam-manager/src/worker.rs |
6,095 | 144 | 877,680 |
crates/jam-client/src/lib.rs |
4,901 | 173 | 847,873 |
apps/desktop/src-tauri/src/commands.rs |
5,244 | 140 | 734,160 |
apps/desktop/src/components/blocks/LocalAgentCreatePanel.tsx |
5,318 | 130 | 691,340 |
crates/jam-daemon/src/lib.rs |
4,505 | 138 | 621,690 |
crates/jam-host/src/copilot/sdk.rs |
4,818 | 111 | 534,798 |
crates/jam-store/src/file.rs |
6,191 | 81 | 501,471 |
crates/jam-domain/src/host_session.rs |
4,662 | 96 | 447,552 |
crates/jam-wire/src/lib.rs |
2,925 | 149 | 435,825 |
apps/desktop/src/components/blocks/types.ts |
2,276 | 155 | 352,780 |
crates/jam-host/src/claudecode/owned/runtime.rs |
4,172 | 83 | 346,276 |
crates/jam-host/src/acp.rs |
4,534 | 61 | 276,574 |
#Largest files
| File | Lines | Production | Test |
|---|---|---|---|
crates/jam-manager/tests/lifecycle.rs |
68,008 | 0 | 68,008 |
crates/jam-manager/src/manager.rs |
58,146 | 51,465 | 6,681 |
bins/jam/src/main.rs |
27,944 | 17,013 | 10,931 |
apps/desktop/e2e/real-agents/specs/first-real-case.spec.ts |
26,320 | 0 | 26,320 |
crates/jam-host/src/codex/app_server.rs |
23,046 | 10,034 | 13,012 |
crates/jam-store/src/sqlite.rs |
19,786 | 13,130 | 6,656 |
crates/jam-host/src/sandbox.rs |
16,536 | 11,067 | 5,469 |
crates/jam-manager/src/worker.rs |
10,610 | 6,095 | 4,515 |
crates/jam-host/src/acp.rs |
9,863 | 4,534 | 5,329 |
crates/jam-host/src/copilot/sdk.rs |
9,325 | 4,818 | 4,507 |
apps/desktop/src/stores/daemon.test.ts |
8,555 | 0 | 8,555 |
crates/jam-host/src/claudecode/owned/runtime.rs |
8,375 | 4,172 | 4,203 |
crates/jam-domain/src/host_session.rs |
8,331 | 4,662 | 3,669 |
crates/jam-store/src/file.rs |
7,634 | 6,191 | 1,443 |
apps/desktop/src/stores/daemon.ts |
7,555 | 7,555 | 0 |
#Inside manager.rs
crates/jam-manager/src/manager.rs holds 51,465 production lines in one file. The regions below come from its impl blocks and // ── Title ── section comments, in file order. "Functions" counts methods declared at the top indentation of each region.
| Region | Starts at line | Production lines | Functions |
|---|---|---|---|
| Module header, types, and helpers | 1 | 2,655 | 31 |
| impl Manager, lines 3376–9380 | 3376 | 6,005 | 199 |
| OAuth token refresh + auth_required state | 9381 | 3,566 | 69 |
| impl Manager, lines 13481–26269 | 13481 | 12,789 | 162 |
| Peer add-availability | 26270 | 865 | 31 |
| Human/room reads | 27135 | 8,050 | 128 |
| Room organization | 35185 | 27 | 2 |
| Kickoff | 35212 | 724 | 6 |
| Room plan | 35936 | 569 | 17 |
| Room artifacts | 36505 | 2,239 | 54 |
| Chat proxies | 38744 | 175 | 7 |
| Lifecycle system messages | 38919 | 172 | 6 |
| Archive | 39091 | 1,842 | 24 |
| Layer-1 authoritative lane Task verbs | 40933 | 1,065 | 24 |
| LAN discovery | 41998 | 527 | 17 |
| Layer 2 | 42525 | 207 | 11 |
| impl Manager, lines 43243–45157 | 43243 | 1,840 | 22 |
| impl Control for Manager (trait adapter) | 45158 | 7,601 | 261 |
| CLI token pairing | 56676 | 547 | 2 |
#Provider knowledge outside the provider crate
Production references to HostTransport:: variants in files outside crates/jam-host. Extension seams explains what these references do.
| File | References |
|---|---|
crates/jam-manager/src/manager.rs |
95 |
crates/jam-domain/src/host_session.rs |
38 |
crates/jam-store/src/sqlite.rs |
21 |
bins/jam/src/main.rs |
10 |
crates/jam-manager/src/analytics.rs |
9 |
crates/jam-manager/src/runtime_host.rs |
8 |
crates/jam-domain/src/agent_event.rs |
3 |
apps/desktop/src-tauri/src/commands.rs |
1 |
bins/jam/src/agent_management.rs |
1 |
crates/jam-manager/src/managed_sandbox_kit.rs |
1 |
crates/jam-manager/src/worker.rs |
1 |
Provider name literals ("codex", "claudecode", "claude", "copilot", "opencode", "cursor") in production code outside crates/jam-host:
| File | Literals |
|---|---|
bins/jam/src/main.rs |
20 |
crates/jam-manager/src/manager.rs |
20 |
crates/jam-domain/src/host_session.rs |
16 |
apps/desktop/src-tauri/src/integration_setup.rs |
12 |
crates/jam-setup/src/claude.rs |
9 |
crates/jam-setup/src/coding_agents.rs |
8 |
bins/jam/src/jamd.rs |
7 |
crates/jam-usage/src/lib.rs |
7 |
bins/jam/src/mcp/install.rs |
6 |
crates/jam-store/src/file.rs |
6 |
bins/jam/src/agent_management.rs |
5 |
crates/jam-store/src/sqlite.rs |
5 |
crates/jam-analytics/src/contract.rs |
4 |
crates/jam-domain/src/workitem.rs |
4 |
apps/desktop/src-tauri/src/commands.rs |
3 |
#API surface
Control methods per trait section, split by which client calls them. "Neither" means the scan found no desktop command and no CLI call; such a method may still have another caller, such as a hook, or be unused.
#Activity
Non-merge commits per week across the repository's history, with the running total.
Schema migrations by the month they landed on main, with the running total. Each migration is one step in the MIGRATIONS array of crates/jam-store/src/sqlite.rs.
