fix: scenario H fixture hunk pins the old lib/co-evolution.sh head #5

	# CI for the co-evolution toolkit (v1.3 Phase 2; closes audit F-4).
	#
	# The matrix is the cross-platform contract: ubuntu (GNU userland, bash 5),
	# macos (BSD userland, stock bash 3.2 — the canary for every GNU-ism), and
	# windows (Git Bash/MINGW, the project's original home). All suites are
	# hermetic: agent CLIs are PATH-stubbed, no network, no LLM spend.
	name: ci

	on:
	push:
	branches: [master]
	pull_request:

	jobs:
	test:
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]
	runs-on: ${{ matrix.os }}
	timeout-minutes: 45
	steps:
	- uses: actions/checkout@v4

	- name: Install mikefarah yq
	shell: bash
	run: \|
	set -euo pipefail
	mkdir -p "$HOME/.local/bin"
	case "$(uname -s)" in
	Linux) asset=yq_linux_amd64 ;;
	Darwin) asset=yq_darwin_arm64; [[ "$(uname -m)" == x86_64 ]] && asset=yq_darwin_amd64 ;;
	MINGW\|MSYS\|CYGWIN*) asset=yq_windows_amd64.exe ;;
	*) echo "unsupported runner OS"; exit 1 ;;
	esac
	dest="$HOME/.local/bin/yq"
	[[ "$asset" == *.exe ]] && dest="$HOME/.local/bin/yq.exe"
	curl -sSL -o "$dest" "https://github.com/mikefarah/yq/releases/latest/download/$asset"
	chmod +x "$dest"
	echo "$HOME/.local/bin" >> "$GITHUB_PATH"

	- name: Doctor (diagnostic only — agent CLIs are stubbed in tests)
	shell: bash
	run: bash scripts/doctor.sh \|\| true

	- name: Show environment
	shell: bash
	run: \|
	bash --version \| head -1
	uname -a
	yq --version
	jq --version

	- name: Run full test suite
	shell: bash
	run: bash tests/run-all.sh

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