The fundamentals import has been dead since 2026-07-25, alerting
SecForbiddenError on form.20260725.idx with "set a real sec_user_agent
contact email". The User-Agent was never the problem.
www.sec.gov/Archives is served from an S3 bucket with no ListBucket
grant, so a MISSING key cannot answer 404 — it returns 403 with S3's
AccessDenied XML. SEC publishes a daily index for business days only, so
2026-07-25 (a Saturday) is simply absent. _get mapped every 403 to the
fatal SecForbiddenError, which made daily_index's `except
SecNotFoundError` unreachable for the exact case it was written for:
the first weekend an incremental walk crossed killed the run, and
last_processed never advanced past Friday.
Latent until activation, not a change at SEC: with no promoted run the
importer takes the backfill path and makes zero daily_index calls, so
the walk was first exercised by the first incremental run.
Verified live 2026-07-30: Sat/Sun 403 with AccessDenied XML while Fri
(51 rows) and Mon (26 rows) return 200 on the same UA; a genuine
rejection is instead the WAF's text/html "Undeclared Automated Tool"
page, served even for files that exist. So the downgrade to "missing" is
gated on all three: the /Archives/ prefix, an XML content type, and
S3's own error code. Every other 403 still alerts and stops.
Missing weekday indexes now log at WARNING — if a rejection page were
ever misread as absent, the importer must not advance past real filings
quietly.
No state to reset: _last_processed_index_date reads promoted runs only,
so the next run walks 2026-07-25..29, skipping the weekend.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
dennisthiessenandClaude Opus 5
5b4fdab85c