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[2026-11-10] eagle: work/projects/cpm-permanent-breakage-metric-tech-design-2026-11-10.md

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Alexey Martemyanov committed 2026-11-10 20:31:57 +06:00
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@@ -42,13 +42,13 @@ Report pages that really never got the extension's answer, and tell persistent b
| Attributed answer (dashboard refresh) | Healthy. Resets the streak. |
| Document ends: new navigation or tab close | If unanswered and alive at least **30 s**: breakage. Shorter silence is not judged (it may be a slow wake). |
| Web content process terminated | Not judged. The tab's next navigation gets `reason=tab_crash`. |
| Extension signals `cpmStage` = `config_unavailable` or `settings_missing` | Breakage at once, no lifetime limit. |
| Extension signals `cpmStage` = `config_unavailable` or `settings_missing` | Breakage at once, no lifetime limit. The signal normally arrives while the page is still loading, so it is remembered and applied when the page finishes. |
| Answer that cannot be tied to one document | That document is not judged. |
| App suspended | Nothing is judged while suspended. |
Judged documents are never re-judged. Measurement state never expires (the old five-minute drop is gone).
**Streak:** consecutive judged breakages since the last healthy answer, any tab, in memory. At 3 the persistent pixel fires once for that streak.
**Series:** reported pages that started after the latest answered page, any tab, in memory. Pages are ordered by navigation start, not by the time of the verdict, so a page judged late (tab closed long after) does not join a series that an answered newer page has already ended. At 3 the persistent pixel fires once for the series.
### Pixels
@@ -84,8 +84,8 @@ Measurements older than five minutes dropped; no minimum lifetime; tab process c
|---|---|---|
| 1, [#8025](https://github.com/duckduckgo/apple-browsers/pull/8025) | Remove ineffective recovery fixes and flags | pushed, in review |
| 2, `alex/cpm-pixel-cleanup` | Remove diagnostics, trim the episode pixel | local, tests pass, not pushed |
| 3, `alex/cpm-breakage-metric` (`d077ae6b94`) | This design: new pixels and removal of the old ones, one commit | local; package tests 1013 pass; both pixel validators pass; macOS app and tests build; iOS build running; not pushed |
| 4, `alex/cpm-init-marks` (`3d6ef2abba`) | Marks and `last_stage` ([[cpm-wake-init-detection-tech-design-2026-11-10]]) | local; package tests 1023 pass; validators pass; not pushed. Extension: `alex/cpm-init-progress` has the new commit `908f9a62`, not pushed |
| 3, `alex/cpm-breakage-metric` (`1d73386e4c`) | This design: new pixels and removal of the old ones, one commit | local; package tests 1013 pass; both pixel validators pass; macOS app and tests build; iOS build running; not pushed |
| 4, `alex/cpm-init-marks` (`fe2fd58362`) | Marks and `last_stage` ([[cpm-wake-init-detection-tech-design-2026-11-10]]) | local; package tests 1023 pass; validators pass; not pushed. Extension: `alex/cpm-init-progress` has the new commit `908f9a62`, not pushed |
### Cons