Migration to v1.4.2

From v1.4.1 to v1.4.2.

Slims the LLM guidance and moves core-over-std to a Clippy lint:

Deletes the .llm/{general,performance,documentation}.md guidance files.
Inlines the performance reminders into src/AGENTS.md.
Runs rust-llm-tidy at the end of .llm/verify.{sh,ps1} when installed.
Adds the std_instead_of_core Clippy lint to the workspace.

1. Delete the guidance files

src/.llm/documentation.md
src/.llm/general.md
src/.llm/performance.md

2. Replace `src/AGENTS.md`

After changes, find and run `.llm/verify.{sh,ps1}` to test + lint.
Print all output.

Performance:

- Prefer borrows: `&str` / `&[T]` returns, `&'static str` constants,
  `Cow<'_, str>` for conditional ownership.
- `Box<str>` for immutable strings.
- Reuse buffers via `.clear()`.
- Const generics for compile-time branching such as
  `<const LINE_NUMBERS: bool>`.
- Prefer performance-oriented crates such as `parking_lot` and `memchr`.
- Keep dependency footprint minimal.

3. Add the tidy step to the verify scripts

In .llm/verify.sh, after the publish dry-run:

 echo "Publish dry-run..."
 run_cmd cargo publish --dry-run --allow-dirty --quiet --workspace
+
+echo "Tidy..."
+if command -v rust-llm-tidy >/dev/null 2>&1; then
+  run_cmd rust-llm-tidy
+else
+  echo "Skipping; rust-llm-tidy not installed. Install: cargo install rust-llm-tidy-cli"
+fi

 if [ "$EXIT_CODE" -eq 0 ]; then

In .llm/verify.ps1, after the publish dry-run:

     Write-Host "Publish dry-run..."
     Invoke-LoggedCommand "cargo" @("publish", "--dry-run", "--allow-dirty", "--quiet", "--workspace")
+
+    Write-Host "Tidy..."
+    if (Get-Command rust-llm-tidy -ErrorAction SilentlyContinue) {
+        Invoke-LoggedCommand "rust-llm-tidy" @()
+    } else {
+        Write-Host "Skipping; rust-llm-tidy not installed. Install: cargo install rust-llm-tidy-cli"
+    }
 } finally {

4. Add the Clippy lint

Root Cargo.toml:

 [workspace]
 resolver = "2"
 members = ["src/my-project"]
+
+# Inherited by members via `[lints] workspace = true`.
+[workspace.lints.clippy]
+# Prefer `core` over `std` where both work.
+std_instead_of_core = "warn"

Every member crate (src/my-project/Cargo.toml, src/cli/Cargo.toml if present):

 # categories = ["command-line-utilities"]
+
+[lints]
+workspace = true

Then fix any hits, for example the benchmark:

-use std::hint::black_box;
+use core::hint::black_box;

5. Update the template version marker

-reloaded-templates-rust:1.4.1
+reloaded-templates-rust:1.4.2