Summarise documentation changes in Slack

from clickruntime import on_event, credentials, http, notify, verify, ai

def gh(method, path, **kw):
    resp = http.request(method, f"https://api.github.com{path}", headers={
        "Authorization": f"Bearer {credentials.connection('github', 'work')}", "Accept": "application/vnd.github+json"}, **kw)
    return resp.raise_for_status() or (resp.json() if resp.content else None)

DOCS = ("docs/", "help-center/")

@on_event
def handle(event):
    if not verify.github(event.body, event.header("X-Hub-Signature-256"), credentials.secret("GITHUB_WEBHOOK_SECRET")):
        return {"ignored": "bad signature"}
    push = event.json
    if push.get("ref") != "refs/heads/main":
        return {"ignored": "not main"}
    repo = push["repository"]["full_name"]
    cmp = gh("GET", f"/repos/{repo}/compare/{push['before']}...{push['after']}")
    files = [f for f in cmp["files"] if f["filename"].startswith(DOCS)]
    if not files:
        return {"ignored": "no docs changes"}
    diff = "\n".join(f"--- {f['filename']}\n{f.get('patch', '')}" for f in files)[:15000]
    summary = ai.generate(diff, system="Summarise these documentation changes for support and sales staff in 2-3 plain sentences.", max_output_tokens=200).text
    notify.slack(f"Docs updated in {repo} (<{push['compare']}|view changes>)\n{summary}", channel="#product")
    return {"files": len(files)}