Changelog

A daily, impact-weighted digest of the open-source repositories you care about.

Each day a GitHub Action clones every watched repo, reads the previous day's commits, and uses an LLM to write a short summary per repo — high-impact changes get individual write-ups, everything trivial is bundled under "Other misc changes." A cheap triage model first picks the high-impact commits whose real diffs are then fed to the write model, so the summaries are grounded in the actual code change. The summaries are published as a Lume site in an Edition-style reading layout.

See digest/SPEC.md for the full digest-script spec.

How it works

repos.yml ──▶ digest/main.ts ──▶ src/posts/<date>_<owner>-<repo>.md ──▶ Lume site ──▶ GitHub Pages
              (git clone + git log + 2-pass LLM)

Configure which repos to watch

Edit repos.yml:

repos:
  - denoland/deno
  - repo: lumeland/lume
    branch: main # optional, defaults to the default branch

Run the digest locally

export OPENAI_API_KEY=sk-...
export GH_TOKEN=$(gh auth token)  # or GITHUB_TOKEN; needed to resolve authors
deno task digest                  # yesterday (UTC)
deno task digest --date 2026-05-20
deno task digest --repo denoland/deno
deno task digest --period weekly  # weekly/monthly rollup of existing dailies
deno task digest --dry-run        # print the LLM prompt, no API call (no token needed)
deno task digest --triage-model gpt-5.4-nano --write-model gpt-5.4-mini

GH_TOKEN (or GITHUB_TOKEN) is required for real runs — it resolves commit authors to GitHub logins for avatars, and the run errors early if neither is set. Only --dry-run skips this.

Models are configurable via OPENAI_TRIAGE_MODEL (default gpt-5.4-nano) and OPENAI_WRITE_MODEL (default gpt-5.4-mini), the CLI flags above, and the API endpoint via OPENAI_BASE_URL.

Preview the site

deno task serve   # http://localhost:3000
deno task build   # outputs to _site/

Deploy (GitHub Pages)

The Digest workflow (.github/workflows/digest.yml) runs at 00:10 UTC: it generates the daily digest (plus a weekly rollup on Mondays and a monthly one on the 1st) and commits any new posts. It then calls the separate Deploy workflow (.github/workflows/deploy.yml), which builds the Lume site and publishes it to Pages. To enable it:

1. Repo Settings → Pages → Source: GitHub Actions.
2. Add an OPENAI_API_KEY repository secret. (The workflow already passes the built-in GITHUB_TOKEN for author resolution — no extra setup needed.)
3. (Optional) set OPENAI_TRIAGE_MODEL / OPENAI_WRITE_MODEL repository variables.

Trigger a manual run from the Actions tab (workflow_dispatch) to test.