Always on, on a regulatory clock.
Held to a must-air window.
The Streamwake reliability loop applied to the four failure modes linear broadcast inherits — long-tail affiliate ingest loss, encoder melt on overnight shifts, linear ad insertion at frame boundaries, and cross-region manifest drift with DRM-token expiry mid-broadcast. Detected, classified, fixed, verified, and written up with a compliance-logging audit trail before the next must-air minute stacks.
Four failure modes
linear broadcast inherits.
The same always-on traffic that makes 24/7 linear the highest-margin video business also concentrates the failure modes on a single, expensive clock — the must-air floor. Four of them show up only at broadcast scale — and each one has a known playbook the Streamwake agent owns.
Detect. Classify. Fix. Verify. Report.
The same five-act loop the Streamwake reliability agent runs on every cohort, tuned for the four pain points above — and the always-on, regulation-bound traffic they all hit on a 24/7 linear channel.
Re-route the long-tail affiliate source when the warm peering edge drops before the must-air window opens, retune the overnight encoder switchover when the long-window weighted average undershoots the compliance floor, recover the frame-boundary seam when the cue-pass drops `splice_insert` against a black-frame seam, snapshot + reissue the regional manifest when EXT-X-MEDIA-SEQUENCE drifts on a single region, and write up the postmortem in Slack and Linear with a compliance-logging audit trail before the next black-air minute bills.
How the loop runs on your linear channel.
Each use case shows what the agent sees, how it ranks the hypotheses, what the fix branch looks like, how the recovery is verified, and where the write-up lands — followed by the postmortem that proves it ran in production on a 24/7 linear channel.
What the agent does on a long-tail affiliate feed when the warm POP affinity hides the ingest loss behind an unrelated cohort pin and the must-air clock is already running.
- DetectPer-channel ingest drop + POP affinity miss
The per-channel probe pattern joins affiliate-feed ingest QoE to POP affinity state and reads the long-tail ingest drop on the warm peering edge while the cohort on the warm POPs reports clean.
- Classifyaffiliate_ingest_longtail_drop at 89%
Top hypothesis: affiliate_ingest_longtail_drop; the license_server_cold_start and cdn_egress_budget lanes are ruled out from the per-channel probe result, and the POP affinity miss detaches cleanly.
- FixRe-route affiliate feed to warm POP + raise ingest TTL
Re-route the long-tail affiliate source to the warm peering edge, raise the ingest-cache TTL across the affected affiliate footprint, and pin license requests to the warm POP until the affinity heuristic confirms parity.
- VerifyMust-air lane holds above the compliance floor
A per-channel probe on the long-tail affiliate feed confirms the ingest latency has snapped back under 90 seconds and the must-air window on the affected channel is holding above the compliance floor.
- ReportPostmortem in Slack + Linear (compliance-logged)
Structured write-up with the per-channel ingest envelope, the POP affinity state, and the agentic-act split lands in the channel with the affected long-tail affiliate flagged and a compliance-log audit trail attached.
What the agent does on an 8-hour overnight linear lane when the long-window weighted average on the encoder pool undershoots the must-air compliance floor by morning.
- DetectLong-window encoder undershoot + must-air floor breach
The probe pattern joins QoE buffer events to encoder ladder state over the 8-hour overnight window and reads the long-window weighted average dropping below the must-air compliance floor on the encoder pool.
- Classifyencoder_abr_long_window_drift at 88%
Top hypothesis: encoder_abr_long_window_drift; the encoder_abr_switchover_overshoot and manifest_packager_segment_drift lanes are ruled out from the multi-window probe result.
- FixRetune overnight switchover + raise egress tolerance
Retune the encoder mid-window switchover against the long-window baseline, raise the egress-budget tolerance on the affected encoder pool, and pin the rendition profile to the recovery bucket for the overnight lane.
- VerifyLong-window weighted average snaps to must-air floor
A re-read of the affected long-window confirms the weighted average has snapped back above the must-air compliance floor; buffer-cliff frequency on the panel-set devices returns to baseline before the morning NOC opens.
- ReportPostmortem in Slack + Linear (compliance-logged)
Structured write-up with the long-window drift chart, the egress-budget tolerance, the must-air floor breach envelope, and the agentic-act split lands in the channel with the affected linear lane flagged.
What the agent does at the mid-roll ad break on a weekday linear lane when the cue-pass drift sends `splice_insert` against a black-frame boundary and the ad-server SLA misses.
- DetectCue-pass drift + black-frame boundary duration spike
The probe pattern reads stitcher cue coverage at the mid-roll window and sees `splice_insert` land on the black-frame boundary; the slate / black-frame duration on the affected channel spikes past the cue budget.
- Classifystitcher_cue_filter_overshoot at 90%
Top hypothesis: stitcher_cue_filter_overshoot; the cdn-A lane and vod_manifest_missing_cue lane are ruled out from the parallel probe result.
- FixSplit cue-pass policy + recover frame-boundary seam
Split the stitcher cue-pass policy live vs VOD, route the live cue pass to the splice-clean edge, and raise the vod.cue_point_coverage probe threshold so the next frame-boundary seam recovers before the cue budget is exhausted.
- VerifyMid-roll lands on the program-return anchor
The cohort-aligned cue-coverage recovery check confirms the frame-boundary seam fix landed; the next `splice_insert` lands on the program-return anchor instead of black-frame and the ad-server SLA holds.
- ReportPostmortem in Slack + Linear (compliance-logged)
Structured write-up with the cue-pass split, the slate / black-frame envelope, and the agentic-act split lands in the channel with the affected linear lane and mid-roll ad break flagged and a compliance-log audit trail attached.
What the agent does when a regional manifest drifts on one region and a DRM token expiry hits mid-broadcast on a viewer cohort pinned to that same region.
- DetectRegional manifest drift + license-fetch stall on the same region
The probe pattern reads EXT-X-MEDIA-SEQUENCE drift and parse-stalls on a single regional manifest while other regions stay clean; Widevine / FairPlay / PlayReady handshake latencies spike on the same viewer cohort pinned to that region.
- Classifymanifest_packager_segment_drift_regional + drm_token_expiry_mid_broadcast at 87% / 85%
Top hypotheses: a dual-rank on regional manifest drift and mid-broadcast DRM-token expiry; the discontinuity_injection_stitcher and per_title_packaging_regression lanes are ruled out from the regional probe result.
- FixSnapshot + reissue regional manifest + force-refresh entitlement tokens
Snapshot the clean source window for the affected region, reissue the manifest from the snapshot, force-refresh the expired entitlement tokens on the affected viewer cohort, and tighten the regional anchor guardrail.
- VerifyRegional parse-stall clears + license-fetch returns inside 90 s
A regional probe confirms the parse-stall rate has dropped back under 0.5% and the median license-fetch latency has snapped back under 90 seconds; the cohort on the other regions remains unaffected.
- ReportPostmortem in Slack + Linear (compliance-logged)
Structured write-up with the regional manifest drift envelope, the entitlement-token refresh window, and the agentic-act split lands in the channel with the affected region flagged and a compliance-log audit trail attached.
Medians across the current Streamwake cohort, refreshed on the quarterly streaming-reliability benchmark — the relationship to fix-branch selection holds at 24/7 linear scale, with the largest effects seen in identifying the affected channel before the mid-window ABR undershoot crosses the must-air compliance floor, and every write-up includes a compliance-logging audit trail by default.
Fewer 3 a.m. NOC pages.
Smaller black-air bills.
Streamwake is in early access for linear broadcast running 24/7 — must-air obligations, compliance logging on every incident, and the affiliate ingest failure modes no longer on the on-call rotation. Run the Free Stream Check on any production linear channel, or pull up the ROI calculator to model your black-air minutes and must-air floor recovery curve — or bring Streamwake's field engineering team in for hands-on support with the must-air lanes no playbook has indexed yet.