v0.4.0

0.4.0 (2026-07-17)

⚠ BREAKING CHANGES

• bazel: drop Bazel 7 support

Features

• bazel: drop Bazel 7 support (845ff78)
• bes: add loopback build event service (03cc670)
• reducer: add extensible Starlark reducers (6879851)
• reducer: add extensible Starlark reducers (334e899)
• release: publish Windows binaries (a672534)

Bug Fixes

• ci: accept Starlark dependencies and publish docs (9d9c8b9)
• ci: isolate remote cache smoke test (70f2795)
• docs: repair wide landing layout (9d3f59c)
• docs: repair wide landing layout (0a6cc2e)
• reducer: preserve Go failure diagnostics (323c972)
• reducer: preserve Go failure diagnostics (f9fb822)
• reducer: preserve Python traceback diagnostics (1442817)
• reducer: preserve Python traceback diagnostics (f030f80)
• reducer: surface C++ root causes (b3cb7dd)
• reducer: surface C++ root causes (55e75a2)
• reducer: surface Java root causes (88a615d)
• reducer: surface Java root causes (e349286)
• reducer: surface protobuf diagnostics (aff28a0)
• reducer: surface protobuf diagnostics (c076157)
• reducer: surface Starlark root causes (ca14985)
• reducer: surface Starlark root causes (8e52df4)
• reducer: surface TypeScript and JavaScript diagnostics (109e183)
• reducer: surface TypeScript and JavaScript diagnostics (842c658)
• release: publish assets through REST API (639ccee)
• release: publish assets through REST API (8c3e3bc)
• release: upload assets to existing releases (4aa029b)
• release: upload assets to existing releases (6ac7357)
• runner: surface Rust test failure evidence (53533b0)
• runner: surface Rust test failure evidence (22fcbc2)

Performance Improvements

• runner: add opt-in POSIX BEP FIFO (a3661c7)
• runner: reduce BEP incrementally (3a846d2)
• runner: reduce BEP incrementally with opt-in POSIX FIFO (206a983)