Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="tests/dependency_failure_tree.bats" line_range="9-15" />
<code_context>
+    cd ./tests/dependency_failure_tree
+}
+
+@test "dependency_failure_tree: shows full 3-level chain on failure" {
+    run env NO_COLOR=1 lets deploy
+    assert_failure
+    assert_line --index 0 "  deploy"
+    assert_line --index 1 "    build"
+    assert_line --index 2 --partial "      lint"
+    assert_line --index 2 --partial "failed here"
+}
+
</code_context>
<issue_to_address>
**issue (testing):** These Bats assertions likely only inspect stdout, but the dependency tree is written to stderr

In `main.go` the tree is printed to stderr (`PrintDependencyTree(depErr, os.Stderr)`), but plain bats-core + bats-assert `run` puts stdout in `$output` and stderr in `$error`, and `assert_line` checks `$output` by default. Unless your helpers redirect stderr to stdout, these assertions won’t actually see the tree. You could instead assert on stderr (e.g. `assert_line --stderr ...` with bats-assert ≥ 2, or an equivalent helper), or redirect stderr in the test (e.g. `run env NO_COLOR=1 lets deploy 2>&1`) so the assertions target the correct stream.
</issue_to_address>

### Comment 2
<location path="tests/dependency_failure_tree.bats" line_range="18-22" />
<code_context>
+    assert_line --index 2 --partial "failed here"
+}
+
+@test "dependency_failure_tree: single node when no depends" {
+    run env NO_COLOR=1 lets lint
+    assert_failure
+    assert_line --index 0 --partial "  lint"
+    assert_line --index 0 --partial "failed here"
+}
+```
</code_context>
<issue_to_address>
**suggestion (testing):** No assertion that NO_COLOR actually suppresses ANSI color codes in the dependency tree output

The tests run with `NO_COLOR=1` but only check for text like `failed here`, so they wouldn’t fail if ANSI escapes were accidentally reintroduced. Add an assertion that the captured output does *not* contain `�[` (or a specific color code), e.g. via `refute_line --regex $'\x1b\['`, so the test explicitly verifies the tree is uncolored when `NO_COLOR` is set.

Suggested implementation:

```shell
@test "dependency_failure_tree: shows full 3-level chain on failure" {
    run env NO_COLOR=1 lets deploy
    assert_failure
    assert_line --index 0 "  deploy"
    assert_line --index 1 "    build"
    assert_line --index 2 --partial "      lint"
    assert_line --index 2 --partial "failed here"
    refute_output --regex $'\x1b\['
}

```

```shell
@test "dependency_failure_tree: single node when no depends" {
    run env NO_COLOR=1 lets lint
    assert_failure
    assert_line --index 0 --partial "  lint"
    assert_line --index 0 --partial "failed here"
    refute_output --regex $'\x1b\['
}

```
</issue_to_address>

### Comment 3
<location path="tests/dependency_failure_tree.bats" line_range="10-15" />
<code_context>
+}
+
+@test "dependency_failure_tree: shows full 3-level chain on failure" {
+    run env NO_COLOR=1 lets deploy
+    assert_failure
+    assert_line --index 0 "  deploy"
+    assert_line --index 1 "    build"
+    assert_line --index 2 --partial "      lint"
+    assert_line --index 2 --partial "failed here"
+}
+
</code_context>
<issue_to_address>
**suggestion (testing):** Consider asserting that the dependency tree appears before the error log line to match the documented behavior

The PR description says the tree should appear *above* the error line (e.g., `ERRO[...] failed to run command ...`), but this test only verifies the tree content, not its position relative to the error. To cover the UX requirement, consider asserting that the initial lines are the tree and that any `ERRO` (or command error) line comes after them.
</issue_to_address>