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← Product & App ArchitectCONTENT HISTORY

Update to Product & App Architect

Snapshot Nov 3, 2026 · 00:12 UTC · version 0.2.0

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Package file

Before

Sep 30, 2026 · 23:18 UTC

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After

Nov 3, 2026 · 00:12 UTC

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Package file

Before

Sep 30, 2026 · 23:18 UTC

2403

After

Nov 3, 2026 · 00:12 UTC

3462

Package file

Before

Sep 30, 2026 · 23:18 UTC

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After

Nov 3, 2026 · 00:12 UTC

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Package file

Before

Sep 30, 2026 · 23:18 UTC

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After

Nov 3, 2026 · 00:12 UTC

Not present

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Changed files

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.codex-plugin/plugin.json →

CHANGELOG.md →

PLUGIN_CREATOR_PROMPT.md →

README.md →

SUBMISSION.md →

UPGRADE_AUDIT.md →

assets/composer-icon.svg →

assets/icon.svg →

benchmarks/cases.json →

benchmarks/reviewer-cases.md →

docs/RESEARCH_NOTES.md →

examples/sample-spec.json →

plugin.json →

references/architecture-decisions.md →

references/build-handoff.md →

references/data-api-contracts.md →

references/feature-specs.md →

references/multi-agent-orchestration.md →

references/nonfunctional-quality.md →

references/official-sources.md →

references/original/app_architecture_patterns.md →

references/original/official_source_registry.md →

references/original/original-skill-v0.1.md →

references/original/prd_and_feature_spec_templates.md →

references/original/product_discovery_framework.md →

references/original/product_readiness_and_handoff.md →

references/original/ux_flow_and_state_patterns.md →

references/platform-product-patterns.md →

references/product-audit.md →

references/product-discovery.md →

references/product-metrics.md →

references/research-and-evidence.md →

references/rollout-and-governance.md →

references/spec-writing.md →

references/ux-and-accessibility.md →

scripts/__pycache__/spec_check.cpython-313.pyc →

scripts/spec_check.py →

scripts/validate_package.py →

skills/architect-application/SKILL.md →

skills/audit-existing-product/SKILL.md →

skills/compare-solutions/SKILL.md →

skills/define-metrics/SKILL.md →

skills/design-data-apis/SKILL.md →

skills/design-user-journey/SKILL.md →

skills/frame-opportunity/SKILL.md →

skills/get-started/SKILL.md →

skills/orchestrate-specialists/SKILL.md →

skills/plan-ai-feature/SKILL.md →

skills/plan-delivery/SKILL.md →

skills/prioritize-roadmap/SKILL.md →

skills/product-app-architect/SKILL.md →

skills/product-app-architect/agents/openai.yaml →

skills/product-app-architect/assets/icon.svg →

skills/product-app-architect/references/app_architecture_patterns.md →

skills/product-app-architect/references/official_source_registry.md →

skills/product-app-architect/references/prd_and_feature_spec_templates.md →

skills/product-app-architect/references/product_discovery_framework.md →

skills/product-app-architect/references/product_readiness_and_handoff.md →

skills/product-app-architect/references/ux_flow_and_state_patterns.md →

skills/review-launch-readiness/SKILL.md →

skills/review-security-quality/SKILL.md →

skills/specify-feature/SKILL.md →

skills/validate-idea/SKILL.md →

skills/write-product-spec/SKILL.md →

submission/listing-and-prompts.md →

submission/public-submission-checklist.md →

submission/release-notes.md →

submission/test-cases.md →

templates/agent-handoff.md →

templates/architecture-decision.md →

templates/data-api-contract.md →

templates/engineering-handoff.md →

templates/feature-delta.md →

templates/measurement-plan.md →

templates/prd.md →

templates/product-brief.md →

templates/release-check.md →

templates/ux-flow.md →

tests/__pycache__/test_spec_check.cpython-313.pyc →

tests/test_spec_check.py →

references/data-api-contracts.md

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+# Data, API and Integration Contracts
+
+Start from user actions and business invariants, not just database tables. Identify entities, ownership, identifiers, cardinalities, lifecycle, retention/deletion, audit events and tenant boundaries.
+
+API contracts specify purpose, auth scopes, input/output schemas, errors, pagination, rate limits, idempotency, retry semantics and versioning. Define conflicting writes and incomplete states. A destructive flow must include preview/confirmation when appropriate.
+
+Schema changes require migrations, backward compatibility checks, rollbacks and backfills appropriate to risk. External services need authentication, quotas, failure behavior, customer-data boundaries and compliance checks.
+
+Never pretend that an endpoint or schema exists without reading its implementation or authoritative specification.
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