Regenerate hex_vet seed workflow (oliver-kriska/claude-elixir-phoenix)

The Regenerate hex_vet seed workflow from oliver-kriska/claude-elixir-phoenix, explained and optimized by Latchkey.

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Source: oliver-kriska/claude-elixir-phoenix.github/workflows/seed-regen.ymlLicense MITView source

What it does

This is the Regenerate hex_vet seed workflow from the oliver-kriska/claude-elixir-phoenix repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: Regenerate hex_vet seed

# Monthly regeneration of priv/hex_vet_seed.exs for /phx:deps-vet --seed.
# Queries hex.pm for top-100 packages, runs Phase 1 audit rules against
# each, and opens a PR with the updated seed. Human-reviewed before
# merge - never auto-merged.

on:
  schedule:
    # 1st of month at 09:00 UTC
    - cron: '0 9 1 * *'
  workflow_dispatch:

jobs:
  regenerate:
    name: Regenerate seed ledger
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Setup Erlang/Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: '27.x'
          elixir-version: '1.18.x'

      - name: Setup Python (for diff_findings.py + seed-regen helper)
        uses: actions/setup-python@v6
        with:
          python-version: '3.12'

      - name: Fetch top-100 package list from hex.pm
        id: fetch
        run: |
          curl -fsSL 'https://hex.pm/api/packages?sort=downloads&page=1' \
            | jq -r '.[] | "\(.name) \(.latest_stable_version)"' \
            > /tmp/top-100.txt
          head -n 100 /tmp/top-100.txt > /tmp/top-100-cut.txt
          wc -l /tmp/top-100-cut.txt

      - name: Run deps-audit rules per package (sequential)
        run: |
          # Pseudocode - actual loop runs each package through the same
          # rules-impl.md run_all_rules pipeline, aggregating to JSON.
          # Output: /tmp/seed-audits.jsonl, one per cleanly-passing package.
          echo "TODO: invoke phx:deps-audit per package, emit clean rows as audit entries"

      - name: Compose new hex_vet_seed.exs
        run: |
          python3 plugins/elixir-phoenix/skills/deps-vet/scripts/compose_seed.py \
            /tmp/seed-audits.jsonl \
            > plugins/elixir-phoenix/skills/deps-vet/priv/hex_vet_seed.exs

      - name: Format
        run: mix format plugins/elixir-phoenix/skills/deps-vet/priv/hex_vet_seed.exs

      - name: Open PR
        uses: peter-evans/create-pull-request@v8
        with:
          commit-message: 'chore(seed): monthly hex_vet_seed regeneration'
          title: 'Monthly hex_vet seed regeneration'
          body: |
            Auto-generated PR updating the `/phx:deps-vet --seed` ledger
            from this month's top-100 hex.pm package list.

            **Review checklist:**
            - [ ] No previously-vetted packages got removed unexpectedly
            - [ ] No new package shows BLOCK findings before vetting
            - [ ] `generated_at` matches today's date
            - [ ] Stale-warning (90d) won't trigger immediately on import
          branch: chore/hex-vet-seed-regen
          labels: |
            seed-regen
            security
            auto-pr

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: Regenerate hex_vet seed
 
# Monthly regeneration of priv/hex_vet_seed.exs for /phx:deps-vet --seed.
# Queries hex.pm for top-100 packages, runs Phase 1 audit rules against
# each, and opens a PR with the updated seed. Human-reviewed before
# merge - never auto-merged.
 
on:
  schedule:
    # 1st of month at 09:00 UTC
    - cron: '0 9 1 * *'
  workflow_dispatch:
 
jobs:
  regenerate:
    timeout-minutes: 30
    name: Regenerate seed ledger
    runs-on: latchkey-small
    permissions:
      contents: write
      pull-requests: write
 
    steps:
      - name: Checkout
        uses: actions/checkout@v6
 
      - name: Setup Erlang/Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: '27.x'
          elixir-version: '1.18.x'
 
      - name: Setup Python (for diff_findings.py + seed-regen helper)
        uses: actions/setup-python@v6
        with:
          cache: 'pip'
          python-version: '3.12'
 
      - name: Fetch top-100 package list from hex.pm
        id: fetch
        run: |
          curl -fsSL 'https://hex.pm/api/packages?sort=downloads&page=1' \
            | jq -r '.[] | "\(.name) \(.latest_stable_version)"' \
            > /tmp/top-100.txt
          head -n 100 /tmp/top-100.txt > /tmp/top-100-cut.txt
          wc -l /tmp/top-100-cut.txt
 
      - name: Run deps-audit rules per package (sequential)
        run: |
          # Pseudocode - actual loop runs each package through the same
          # rules-impl.md run_all_rules pipeline, aggregating to JSON.
          # Output: /tmp/seed-audits.jsonl, one per cleanly-passing package.
          echo "TODO: invoke phx:deps-audit per package, emit clean rows as audit entries"
 
      - name: Compose new hex_vet_seed.exs
        run: |
          python3 plugins/elixir-phoenix/skills/deps-vet/scripts/compose_seed.py \
            /tmp/seed-audits.jsonl \
            > plugins/elixir-phoenix/skills/deps-vet/priv/hex_vet_seed.exs
 
      - name: Format
        run: mix format plugins/elixir-phoenix/skills/deps-vet/priv/hex_vet_seed.exs
 
      - name: Open PR
        uses: peter-evans/create-pull-request@v8
        with:
          commit-message: 'chore(seed): monthly hex_vet_seed regeneration'
          title: 'Monthly hex_vet seed regeneration'
          body: |
            Auto-generated PR updating the `/phx:deps-vet --seed` ledger
            from this month's top-100 hex.pm package list.
 
            **Review checklist:**
            - [ ] No previously-vetted packages got removed unexpectedly
            - [ ] No new package shows BLOCK findings before vetting
            - [ ] `generated_at` matches today's date
            - [ ] Stale-warning (90d) won't trigger immediately on import
          branch: chore/hex-vet-seed-regen
          labels: |
            seed-regen
            security
            auto-pr

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cache dependency installs on the setup step so they are served from cache.
Add a job timeout so a hung step cannot burn hours of runner time.

2 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

Network fetches

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout actions/setup-python peter-evans/create-pull-request