matrix-bot.yml

name: Matrix Bot (#446 live matrix)
# Phase C lane L-C6 of gHashTag/trios#536. Hourly cron that reads
# ssot.bpb_samples on the Phase C SSOT (Railway phd-postgres-ssot per
# trios-railway#62 workaround), groups by (format, algo) with MIN(bpb), and
# regenerates the live-matrix section of gHashTag/trios#446.
#
# The bot is idempotent: it only PATCHes the issue when the rendered body
# changes, so silent hours are truly silent.
#
# Anchor: phi^2 + phi^-2 = 3.

on:
  schedule:
    - cron: "7 * * * *"  # every hour at :07
  workflow_dispatch:
    inputs:
      dry_run:
        description: "Dry run (print body to stdout, skip PATCH)"
        required: false
        default: "false"
      formats:
        description: "Optional comma-separated format axis override"
        required: false
        default: ""
      algos:
        description: "Optional comma-separated algo axis override"
        required: false
        default: ""

permissions:
  issues: write
  contents: read

concurrency:
  group: matrix-bot
  cancel-in-progress: false

jobs:
  regen:
    name: Regenerate #446 body
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - name: Install psycopg2
        run: pip install --quiet psycopg2-binary

      - name: Run matrix_bot
        env:
          MATRIX_DATABASE_URL: ${{ secrets.MATRIX_DATABASE_URL }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          MATRIX_DRY_RUN: ${{ github.event.inputs.dry_run == 'true' && '1' || '' }}
          MATRIX_FORMATS: ${{ github.event.inputs.formats }}
          MATRIX_ALGOS: ${{ github.event.inputs.algos }}
        run: python3 .github/scripts/matrix_bot.py