Learnt from: kjanat
Repo: kjanat/runner PR: 1
File: src/cmd/mod.rs:67-75
Timestamp: 2026-03-26T20:05:44.851Z
Learning: In Rust, `std::process::Command` does not provide getters for stdio configuration, so whether `Stdio::inherit()` (or other `Stdio::*` settings) was applied cannot be asserted via pure unit tests without spawning a process and inspecting OS-level fds. When reviewing Rust code, do not flag “missing unit test coverage” for stdio configuration on `std::process::Command` as a code issue—treat the explicit `Command::stdin/stdout/stderr` setter calls in the source as the meaningful guarantee.

Learnt from: kjanat
Repo: kjanat/runner PR: 4
File: src/tool/just.rs:132-133
Timestamp: 2026-04-21T15:16:40.277Z
Learning: In Rust, if a method like `ExtractedTask::name() -> &str` returns a borrowed `&str` tied to `&self`, then using `sort_unstable_by_key(|t| t.name())` should be avoided because `by_key` requires the key to not borrow from the element being sorted (it will fail to compile due to the key’s lifetime). Do not recommend `sort_unstable_by_key` as a simplification in this situation. If you need an allocation-free and idiomatic comparison, use `sort_unstable_by(|a, b| a.name().cmp(b.name()))` instead. Using `.to_owned()` inside `by_key` is an alternative but allocates a `String` per element.

Learnt from: kjanat
Repo: kjanat/runner PR: 5
File: src/lib.rs:222-223
Timestamp: 2026-05-04T23:28:17.947Z
Learning: When reviewing Rust `rustdoc` comments (`/// ...`), treat a trailing backslash (`\`) at the end of a comment line as valid CommonMark syntax for a hard line break (rendered as `<br>`). Do not flag such trailing backslashes as papercuts or recommend removing them unless there is clear evidence they are unintended (e.g., they are not in the `rustdoc` comment context or the surrounding formatting contradicts the intended CommonMark hard-break usage).

Learnt from: kjanat
Repo: kjanat/runner PR: 34
File: Cargo.toml:61-61
Timestamp: 2026-06-01T17:42:48.461Z
Learning: In this repo, do not flag `actions_rs::log::GroupGuard` or `actions_rs::log::group_guard` as missing/non-existent when they are referenced in Rust code, because the `actions-rs` crate (dependency `actions-rs = "0.1"` / published v0.1.x) exports `pub struct GroupGuard` and `pub fn group_guard` from `actions_rs::log` (and also exports `actions_rs::env::is_github_actions`). This avoids false positives from outdated/incorrect web search results. If the repo does not depend on `actions-rs = "0.1"` in `Cargo.toml`, then normal missing-import/item checks can apply.

Learnt from: kjanat
Repo: kjanat/runner PR: 45
File: src/lib.rs:659-661
Timestamp: 2026-06-11T18:52:28.233Z
Learning: In Rust, it’s acceptable to use `matches!(cli.command, Some(cli::Command::Doctor { .. }))` (or similar) when the scrutinee comes from a field accessed through a shared reference (e.g., `cli: &Cli`). If the match pattern uses `..` and binds zero fields (so only the enum discriminant is matched), Rust match ergonomics will avoid moving out of the referenced value. Reviewers should not flag such code as a compile-blocking move; confirm with `cargo check` rather than forcing changes like `.as_ref()` when compilation succeeds.

Learnt from: kjanat
Repo: kjanat/runner PR: 1
File: src/tool/go_task.rs:64-81
Timestamp: 2026-03-26T16:14:15.754Z
Learning: If code uses let-chains (e.g., `if let Some(x) = foo && ... && let Some(y) = bar`), ensure the crate’s `Cargo.toml` sets `package.edition = "2024"`. Rust 2021/earlier should not be used with let-chains; require 2024 specifically for compilation.

Learnt from: kjanat
Repo: kjanat/runner PR: 27
File: src/types.rs:584-585
Timestamp: 2026-05-15T01:31:48.037Z
Learning: In the `kjanat/runner` Rust codebase, remember that `just` treats its `justfile` name as officially case-insensitive and allows the hidden variant: `justfile`, `Justfile`, `JUSTFILE`, etc., and `.justfile`. `TaskSource::Justfile` detection should recognize these filename variants. Also note that `from_label` in `src/types.rs` is for parsing user-supplied qualifier prefixes (e.g. `justfile:build`), not for detecting the on-disk justfile. If you add/adjust qualifier label emission for `TaskSource::Justfile`, it’s not strictly required for backward compatibility because `TaskSource::label()` previously only emitted lowercase `"justfile"`, but adding additional casing/hidden variants as a defensive UX improvement is consistent with `just`’s official support.