Phase 2/3 of the std::fs lint initiative (Phase 1 refactors landed in
commit 9d1c0d98c).
clippy.toml additions (appended to disallowed-methods):
std::fs::read, read_to_string, write, read_dir, copy, canonicalize
std::fs::File::open, File::create, File::create_new
std::fs::OpenOptions::open
File::options was deliberately excluded — it returns an OpenOptions
builder with no syscall. OpenOptions::open is where the block happens.
Non-blocking std::fs items (metadata, exists, create_dir_all, remove_*,
rename, and all std::fs types) remain legal.
Annotation policy (per updated plan):
- Mixed async/sync production source: function- or statement-scoped
#[expect(...)] so future accidental Tokio-path regressions in the
same file still fire.
- Fully-sync production source, test modules, integration tests,
build.rs: file-level #![expect(...)].
- Every #[expect] has a specific reason identifying the sync context.
Annotations added in ~90 files across the workspace. Notable narrow
placements: fabro-server server.rs current_server_target,
build_disk_usage_response, create_test_app_state_with_session_key;
fabro-server install.rs read_to_string rollback snapshot;
fabro-sandbox local.rs list_recursive; fabro-agent cli.rs FOLLOW-UP on
the JSON-stdout writer; fabro-llm providers/common.rs FOLLOW-UP for
load_file_as_base64 (7 translator call sites; revisit if file:// URL
usage grows).
build.rs blanket allows: fabro-api/build.rs, fabro-util/build.rs.
Pre-existing unrelated nightly-clippy warnings fixed under scope:
fabro-sandbox sandbox_spec.rs (unused_imports, unused_async),
reconnect.rs (unused_variables, unused_async).
Verified: cargo +nightly-2026-04-14 clippy --workspace --all-targets
-- -D warnings passes; fmt clean; 4129/4131 tests pass (two known
flakes under parallel nextest load, both pass individually and are
unrelated to this change).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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