feat: production-ready CLI — config fallback, async MCP, TUI fixes, o… #374

	# Purpose: spec-ci workflow — delegates `sin spec check --all` to the n8n CI VM.
	# Docs: docs/SPEC-LAYER.md §"CI gate"
	# n8n-delegated per mandate M1 (see AGENTS.md §M1).
	name: spec-ci

	on:
	pull_request:
	push:
	branches: [main]

	concurrency:
	group: spec-ci-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	delegate:
	name: Delegate spec check to n8n
	runs-on: ubuntu-latest
	timeout-minutes: 2
	steps:
	- name: Check n8n webhook secret
	env:
	N8N_CI_WEBHOOK_URL: ${{ secrets.N8N_CI_WEBHOOK_URL }}
	run: \|
	if [[ -z "$N8N_CI_WEBHOOK_URL" ]]; then
	echo "::error::N8N_CI_WEBHOOK_URL secret is not configured"
	exit 1
	fi
	- name: Checkout
	uses: actions/checkout@v7
	- name: Set up Go
	uses: actions/setup-go@v6
	with:
	go-version: '1.26'
	- name: Lightweight pre-check
	run: \|
	go vet ./cmd/sin-code/...
	- name: Trigger n8n webhook
	env:
	N8N_CI_WEBHOOK_URL: ${{ secrets.N8N_CI_WEBHOOK_URL }}
	run: \|
	curl -fsS -X POST \
	-H "Content-Type: application/json" \
	-d '{"event":"spec-ci","ref":"${{ github.ref }}","sha":"${{ github.sha }}"}' \
	"$N8N_CI_WEBHOOK_URL"

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