# Regression guard for issue #2578.
#
# Bug: The ADR-104 witness fix marker was the literal string
#   `agentic-flow/transport/loader`, and plugin-agent-federation's
#   `src/transport/midstream-aware-loader.ts` performed a static
#   `import type { … } from 'agentic-flow/transport/loader'`. Upstream
#   `agentic-flow` does not expose that subpath in its `exports` map —
#   any external verifier that literally resolves the specifier fails
#   with `ERR_MODULE_NOT_FOUND`, and strict `moduleResolution: bundler`
#   builds break too.
#
# Rules enforced (regression trip-wires):
#   1. No file under v3/@claude-flow/plugin-agent-federation/src/ may
#      static-import `agentic-flow/transport/loader`. Dynamic
#      `import('agentic-flow/transport/loader')` guarded by try/catch
#      remains allowed (that is the intentional optional-path).
#   2. verification/witness-fixes.json's `ADR-104-transport` entry must
#      NOT declare `agentic-flow/transport/loader` as its `marker`.
#   3. ADR-104's supported smoke import target is the federation plugin
#      loader, and that loader owns a WebSocket fallback for current
#      agentic-flow releases that do not export `./transport/loader`.
name: no-phantom-agentic-flow-subpath

on:
  push:
    branches: [main]
    paths:
      - 'v3/@claude-flow/plugin-agent-federation/src/**'
      - 'v3/@claude-flow/plugin-agent-federation/dist/**'
      - 'v3/docs/adr/ADR-104-federation-wire-transport.md'
      - 'scripts/smoke-adr104-transport.mjs'
      - 'verification/witness-fixes.json'
      - '.github/workflows/no-phantom-agentic-flow-subpath.yml'
  pull_request:
    paths:
      - 'v3/@claude-flow/plugin-agent-federation/src/**'
      - 'v3/@claude-flow/plugin-agent-federation/dist/**'
      - 'v3/docs/adr/ADR-104-federation-wire-transport.md'
      - 'scripts/smoke-adr104-transport.mjs'
      - 'verification/witness-fixes.json'
      - '.github/workflows/no-phantom-agentic-flow-subpath.yml'
  workflow_dispatch:

jobs:
  guard:
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4

      - name: Rule 1 — midstream-aware-loader must not static-import agentic-flow/transport/loader
        # Scoped to the file the #2578 fix touched. midstream-aware-loader.ts
        # is what plugin.ts uses at runtime (via loadFederationTransport), so a
        # regression here breaks the runtime path and the external Check 8
        # verifier. A dynamic `import('agentic-flow/transport/loader')` guarded
        # by try/catch is the intentional optional path and stays allowed.
        run: |
          node -e "
            const { readFileSync } = require('fs');
            const target = 'v3/@claude-flow/plugin-agent-federation/src/transport/midstream-aware-loader.ts';
            const src = readFileSync(target, 'utf-8');
            const re = /^\s*(?:import|export)(?:\s+type)?\s+[^;]*?from\s+['\"]agentic-flow\/transport\/loader['\"]/m;
            if (re.test(src)) {
              console.error('#2578 regression: ' + target + ' static-imports agentic-flow/transport/loader.');
              console.error('That subpath is not in agentic-flow\\'s published exports map — external Check 8 verifiers ERR_MODULE_NOT_FOUND.');
              console.error('Use the locally-declared type surface + dynamic import guarded by try/catch instead.');
              process.exit(1);
            }
            console.log('OK — ' + target + ' does not static-import the phantom subpath.');
          "

      - name: Rule 2 — ADR-104 witness marker must not be the phantom subpath
        run: |
          node -e "
            const { readFileSync } = require('fs');
            const witness = JSON.parse(readFileSync('verification/witness-fixes.json', 'utf-8'));
            const fixes = witness.fixes || witness || [];
            const entries = Array.isArray(fixes) ? fixes : Object.values(fixes);
            const adr104 = entries.find(f => f && f.id === 'ADR-104-transport');
            if (!adr104) {
              console.error('#2578 regression guard: ADR-104-transport entry missing from verification/witness-fixes.json');
              process.exit(1);
            }
            if (adr104.marker === 'agentic-flow/transport/loader') {
              console.error('#2578 regression: ADR-104-transport marker reverted to the phantom subpath.');
              console.error('agentic-flow does not export ./transport/loader — external Check 8 verifiers will ERR_MODULE_NOT_FOUND.');
              console.error('Use a marker that appears in the plugin\\'s own dist (e.g. loadFederationTransport).');
              process.exit(1);
            }
            console.log('OK — ADR-104-transport marker is \"' + adr104.marker + '\" (not the phantom subpath).');
          "

      - name: Rule 3 — ADR-104 smoke import target must be plugin loader
        run: node scripts/smoke-adr104-transport.mjs