Accountability — three disciplines as one system
How sprint contracts, postmortems, and pre-flight gates compound — and where each catches the others’ failures.
Three disciplines, one system
Most teams that adopt sprint contracts, postmortems, and gates implement them in isolation. Each discipline does some good work on its own. None of them catch the failure modes of the others.
The compounding only starts when they integrate: contracts produce gates, postmortems strengthen contracts, gates carry context from postmortems back to runtime. Each layer covers what the others miss. The system stops being three separate practices and starts being one accountability loop.
The integration is mostly mechanical. A contract criterion ships as a gate; a postmortem action item ships as a gate or contract criterion; a gate that fires links back to the incident or contract that produced it. None of this requires new tools — it requires that every artifact in one layer has a corresponding artifact in the others.
How the three disciplines catch each other
The compounding works because each discipline catches what the other two can’t. Read this table closely — it’s the entire integration in one view.
| Discipline | Catches | Misses (caught by next discipline) |
|---|---|---|
| Sprint contracts | Scope drift, missing acceptance criteria, ambiguous “done” | Failure modes not enumerated in the template — caught by postmortems |
| Postmortems | Structural causes of failures, gaps in contract templates | Action items that don’t ship — caught by gates / mechanical layer |
| Pre-flight gates | Missing checks at runtime, bypassed disciplines | Gate criteria that aren’t in the contract — caught by next contract’s template review |
The cycle closes. Gates catch what postmortems missed; postmortems strengthen contracts; contracts produce gates. Without all three, one of the three failure modes leaks through.
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Accountability — contracts + postmortems + gates as one system
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