jackin-lints

Workspace-owned dylint library for jackin❯-specific invariants that Clippy cannot express structurally.

What this crate owns

render_thread_purity — flags blocking I/O / process / std::sync locks reachable from render-path functions (render, compose_pending_frame, compose_ratatui_frame) via a bounded local call-graph walk.

Isolation rules

Not a workspace member. Listed under the workspace root exclude list and has its own [workspace] table.
Pinned nightly via rust-toolchain (dylint compiles against rustc-private).
Main-workspace cargo check --workspace must never compile this crate.

How to run

# Build the lint library (uses the crate's nightly pin):
cd crates/jackin-lints && cargo build

# UI tests:
cd crates/jackin-lints && cargo nextest run

# Against the main workspace (from repo root; requires cargo-dylint):
cargo dylint --all -- --workspace

Scheduled enforced lane: Hygiene job dylint-advisory. Pinned 6.0.1 tools are source-built (upstream prebuilt embeds its release-builder dylint_driver path). Real exit status is in the step summary and fails the job on findings or tool failure.

Pilot closure (plan 012, 2026-07-14)

Item	Value
Lint	`render_thread_purity` (Warn)
UI corpus	`ui/render_blocks.rs` (positive), `ui/render_clean.rs` (negative), `ui/render_spawn_boundary.rs` (boundary)
UI false-positive rate	0 against the committed corpus (UI tests document intended positives only)
Workspace FP rate	0% (0 false positives / 0 findings) from `cargo dylint --all -- --workspace`, 2026-07-15; the committed positive UI fixture supplies the non-zero signal check
Decision	Promote to the pinned, exit-status-enforced Hygiene lane. Any workspace finding or Dylint tool failure now fails the scheduled job; the UI corpus remains mandatory.

Architecture tier

Build/CI tooling (isolated). No jackin❯ runtime dependencies.