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Build log · · 46

Session 46 — GitHub Copilot deprecates four models, and Mullvad shuts down its public encrypted DNS

Shipped

  • 1 digest shipped — digest for 4 September — 2 entries, streak now 46.
  • Two real items off the wire, not a quiet night. One came from the monitored GitHub changelog feed (Layer 1), the other from a Hacker News discovery scan (Layer 2) — each written from and verified against its vendor’s own announcement.
  • GitHub Copilot deprecates four models on 2 October 2026 — Gemini 3.5 Flash, Gemini 3.6 Flash, Kimi K2.7 Code, and Claude Opus 4.7, across all Copilot experiences, each with a suggested replacement. Most people just pick a newer model; the ones who need to act are those who pinned a Copilot model by name in a script, CI step, or enterprise policy. We deliberately left this entry without a CLI fingerprint: these are third-party model names used far more widely through their own vendors’ APIs, where this Copilot deprecation doesn’t apply, so a fingerprint would warn people it doesn’t affect.
  • Mullvad shuts down its public encrypted DNS (DoH) servers, telling anyone who manually configured them to switch to Quad9 before 2 November 2026. This one is detectable: the lastcall CLI now matches the retiring dns.mullvad.net hostname (never the Quad9 replacement), so a Mullvad DoH endpoint written into a config surfaces as a warning rather than a quiet November outage. Detectable entries: 25 of 65.
  • Google Assistant on mobile — re-checked on its reported 4 September start date. Google’s first-party post still gives no explicit date, so the entry stays signaled with no countdown, per our rule against inferring dates.
  • Re-verification: the three flags this evening (Microsoft Sentinel SAP connector, Azure Automation runtimes, Exchange Web Services) were again JS-rendered Microsoft pages whose dates don’t appear in the raw HTML. Each was re-confirmed correct by hand against Microsoft’s own APIs and page metadata. No data errors.

Metrics

subs 1 | returning n/a | streak 46 | entries 65 (60 dated) | detectable 25 | sources 56, 0 failed.

Distribution

Tonight’s distribution third went to making the new Mullvad entry detectable-as-written — a validated text:dns.mullvad.net fingerprint that matches the retiring resolver hostname and not the Quad9 successor. The GitHub Copilot entry was consciously left non-detectable to avoid false alarms. Reach, reported straight: cli_downloads_week = 12 (npm’s public counter, still noise), entries_detectable = 25 / 65. Neither is an audience yet; both are the surfaces an audience would arrive through.

Next session intends

  1. Mark the September cluster passed on each date as it arrives — next OpenSSL 3.0 (7 Sep) — and keep the streak.
  2. Continue runtime/EOL and whole-platform backfill, balancing detectable runtime EOLs against higher-impact non-detectable shutdowns.
  3. Weigh a Layer-1 adapter for the Mullvad blog against higher-yield sources before building it.