chore: "no fail fast" test mode

.github/copilot-instructions.md

@@ -16,3 +16,4 @@ Read and follow the CONTRIBUTING.md file in this repository for all code style c
 - Minimize `unwrap()` in non-test code — use proper error handling
 - Install toolchain before running tests: `rustup toolchain install "$(< rust-toolchain)" && rustup component add --toolchain "$(< rust-toolchain)" rustfmt clippy`
 - Run `FMT=true LINT=true BUILD=true TEST=true DOC=true ./test.sh` to validate changes
+- Set `PDU_NO_FAIL_FAST=true` to run all checks instead of stopping at the first failure — this lets you see which checks pass and which fail

AGENTS.md

@@ -16,3 +16,4 @@ Read and follow the CONTRIBUTING.md file in this repository for all code style c
 - Minimize `unwrap()` in non-test code — use proper error handling
 - Install toolchain before running tests: `rustup toolchain install "$(< rust-toolchain)" && rustup component add --toolchain "$(< rust-toolchain)" rustfmt clippy`
 - Run `FMT=true LINT=true BUILD=true TEST=true DOC=true ./test.sh` to validate changes
+- Set `PDU_NO_FAIL_FAST=true` to run all checks instead of stopping at the first failure — this lets you see which checks pass and which fail

CLAUDE.md

@@ -16,4 +16,5 @@ Read and follow the CONTRIBUTING.md file in this repository for all code style c
 - Minimize `unwrap()` in non-test code — use proper error handling
 - Install toolchain before running tests: `rustup toolchain install "$(< rust-toolchain)" && rustup component add --toolchain "$(< rust-toolchain)" rustfmt clippy`
 - Run `FMT=true LINT=true BUILD=true TEST=true DOC=true ./test.sh` to validate changes
+- Set `PDU_NO_FAIL_FAST=true` to run all checks instead of stopping at the first failure — this lets you see which checks pass and which fail
 - `gh` (GitHub CLI) is not installed — do not attempt to use it

template/ai-instructions/shared.md

@@ -16,3 +16,4 @@ Read and follow the CONTRIBUTING.md file in this repository for all code style c
 - Minimize `unwrap()` in non-test code — use proper error handling
 - Install toolchain before running tests: `rustup toolchain install "$(< rust-toolchain)" && rustup component add --toolchain "$(< rust-toolchain)" rustfmt clippy`
 - Run `FMT=true LINT=true BUILD=true TEST=true DOC=true ./test.sh` to validate changes
+- Set `PDU_NO_FAIL_FAST=true` to run all checks instead of stopping at the first failure — this lets you see which checks pass and which fail

test.sh

@@ -1,6 +1,21 @@
 #! /bin/bash
 set -o errexit -o pipefail -o nounset
 
+# Validate PDU_NO_FAIL_FAST
+no_fail_fast="${PDU_NO_FAIL_FAST:-false}"
+case "$no_fail_fast" in
+true | false) ;;
+*)
+  echo "error: Invalid value for PDU_NO_FAIL_FAST: $no_fail_fast (expected 'true' or 'false')" >&2
+  exit 1
+  ;;
+esac
+
+# A temporary file is used instead of a variable because run_if and unit are
+# subshells, so variable assignments inside them don't propagate to the parent.
+failure_dir=$(mktemp -d)
+failure_marker="$failure_dir/failed"
+
 run() (
   echo >&2
   echo "exec> $*" >&2
@@ -16,7 +31,16 @@ run_if() (
   condition="$1"
   shift
   case "$condition" in
-  true) run "$@" ;;
+  true)
+    if [[ $no_fail_fast == 'true' ]]; then
+      run "$@" || {
+        echo "error: Command $* failed with exit code $?" >&2
+        touch "$failure_marker"
+      }
+    else
+      run "$@"
+    fi
+    ;;
   false) skip "$@" ;;
   *)
     echo "error: Invalid condition: $condition" >&2
@@ -39,3 +63,11 @@ unit --all-features "$@"
 unit --features cli "$@"
 unit --features cli-completions "$@"
 unit --features ai-instructions "$@"
+
+if [[ -f "$failure_marker" ]]; then
+  rm -rf "$failure_dir"
+  echo >&2
+  echo 'error: Some checks have failed. Review the output above for details.' >&2
+  exit 1
+fi
+rm -rf "$failure_dir"