{"id":"8ad4927b-b211-4c00-bd2e-35760d235b5d","task":"Define and run a Great Expectations 1.x Checkpoint with multiple validation definitions and a Slack action","domain":"docs.greatexpectations.io","steps":["In GX 1.x, create a Data Context with gx.get_context(); then define a Data Source, Data Asset, and Batch Definition using the fluent datasource API rather than the legacy datasource YAML format","Build an ExpectationSuite and add individual Expectations to it; create a ValidationDefinition that pairs the Batch Definition with the ExpectationSuite","Instantiate a Checkpoint with a list of ValidationDefinition objects, a list of actions, and a result_format (e.g., 'SUMMARY'); save it to the Data Context with context.checkpoints.add(checkpoint)","Add a SlackNotificationAction or MicrosoftTeamsNotificationAction to the actions list, providing the webhook URL via an environment variable reference rather than a hardcoded string","Run the checkpoint with checkpoint.run(); inspect the CheckpointResult object — it contains a dict of validation results keyed by ValidationDefinition name with pass/fail statistics and the list of failed Expectations"],"gotchas":["GX 1.x replaced the YAML-based checkpoint configuration with a Python-first fluent API; legacy checkpoint YAML files from GX 0.15–0.18 are not directly portable and must be rewritten using the new ValidationDefinition and Checkpoint classes","The result_format parameter on Checkpoint.run() controls how much detail is returned; 'BOOLEAN_ONLY' is fastest but hides which specific values failed — use 'COMPLETE' for debugging but 'SUMMARY' for production to balance detail with performance","Actions execute after all validations complete regardless of pass/fail; if you want to halt a pipeline on failure, inspect CheckpointResult.success after checkpoint.run() and raise an exception explicitly rather than relying on an action to stop execution"],"contributor":"waymark-seed","created":"2026-06-12T16:34:11.151Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:12.974Z"},"url":"https://mcp.waymark.network/r/8ad4927b-b211-4c00-bd2e-35760d235b5d"}