Specifies thresholds, routing, dashboards, diagnostic steps, escalation, remediation, and review for postmortems. This reference fixes the adoption boundary, failure behavior, and observable evidence while leaving environment-specific limits configurable.
Package status: reference context ready for human review. The contract and test scenarios are complete, but no claim is made that an adopting implementation has passed them.
Decision
For Postmortems, adopt a versioned telemetry contract tied to service objectives and runbooks. Operate the capability with named signals, bounded capacity, owned alerts, a diagnostic runbook, and tested recovery evidence. This operations block focuses specifically on alert and response procedure. This package is a reference contract: the adopting team must choose numeric limits, providers, jurisdictions, and operational owners from evidence in its own environment.
Scope
- The Postmortems actors, inputs, outputs, states, policy or schema versions, and externally visible outcomes required for the alert and response procedure focus of this operations block.
- Primary and alternate interfaces, background work, caches, integrations, support paths, and evidence that can exercise the same boundary.
- Adoption-specific configuration, rollout, recovery, and verification responsibilities needed to apply the reference safely.
Outside this block
- Choosing a universal vendor, framework, jurisdiction, numeric threshold, retention period, or service-level objective for every adopter.
- Claiming that packaged scenarios have run against a downstream implementation or that this reference grants legal, security, or accessibility certification.
Contract
- Define each signal, unit, aggregation, attributes, owner, expected cardinality, retention, and decision it supports.
- Propagate correlation across request, queue, job, and dependency boundaries without placing secrets or unrestricted personal data in attributes.
- Alert on user-impacting symptoms or exhausted safety margins, with a diagnostic path and a named response owner.
- Treat sampled traces and client reports as evidence; do not let unauthenticated telemetry authorize production mutation or rollback by itself.
- Define normal, degraded, exhausted, and unavailable states with decision metrics and explicit operator actions.
- Preserve accepted-work identity during failover, replay, rollback, and repair so recovery cannot duplicate or silently lose effects.
- Build a factual timeline from alerts, deploys, traces, logs, decisions, customer impact, mitigations, recovery, and uncertainty without assigning blame as a substitute for causal analysis.
- Separate trigger, contributing conditions, detection and response gaps, and systemic causes and track each corrective action with owner, priority, due date, verification, and effectiveness review.
- Define trigger thresholds, evaluation windows, deduplication, severity, routing, acknowledgement, diagnostic entry points, escalation, mitigation authority, and recovery criteria.
- Keep the response procedure executable under dependency loss, stale dashboards, missing owners, duplicate alerts, and shift handoff and record every material operator decision.
- For the alert and response procedure variant, enforce this declared boundary: specifies thresholds, routing, dashboards, diagnostic steps, escalation, remediation, and review for postmortems.
Implementation guidance
- Practice the runbook in a representative environment and record recovery time, data loss boundary, and unresolved assumptions.
- Model Postmortems inputs, outputs, actors, states, invariants, side effects, and evidence before selecting framework or vendor details.
- Store the applicable Postmortems contract or policy version with material state so migrations, replay, and support decisions remain attributable.
- Introduce the path behind controlled rollout, compare expected and observed outcomes, and keep a tested recovery route until adoption evidence is complete.
Failure handling and safeguards
- Missing telemetry is itself detectable, while the monitored service remains bounded and does not depend on observability export success.
- Invalid or contradictory Postmortems state is rejected or quarantined; the implementation never guesses a value that broadens authority or duplicates an effect.
- Retries are bounded and use durable identity; after exhaustion, work reaches an inspectable terminal state with an accountable owner.
- A missing, delayed, or noisy alert enters an owned detection-gap path; responders do not declare recovery until the user-facing condition and its leading signals are stable.
Verification and operations
- Inject saturation, dependency outage, stale configuration, and telemetry loss and confirm the declared degraded behavior.
- Monitor Postmortems success, denial, validation failure, dependency failure, retry exhaustion, and recovery by contract version without sensitive payload dimensions.
- Re-run paired positive and negative fixtures after policy, schema, dependency, migration, or boundary changes and preserve the resulting evidence.
- Run a timed response drill from trigger through acknowledgement, diagnosis, mitigation, escalation, recovery, and review and retain timestamps and decision evidence.
Adoption assumptions
- Names and values in the example are a concrete fixture, not universal defaults; adopters replace them through documented evidence and ownership.
- The adopting system can provide authenticated identity, durable operation or record versions, bounded telemetry, and a controlled path for change.
The executable-looking examples in this package are fixtures and acceptance contracts. Run the collection validator to check structure and metadata, then translate and execute the scenarios in the target repository before recording implementation evidence.