Context Ontology Accelerator — The AI Toolchain

Context Ontology Accelerator v0.2.2

Thu, 27 Aug 2026 21:26:15 GMT

Adds an iterative NL→SQL agent, FK-aware ontology graph traversal, and `@pk`/@fk(...) constraint tags for Athena connectors. • Adds `explore_graph` as an opt-in Tier-2 agent tool in `OntologyGraphTool` for foreign-key-aware join discovery, walking the ontology graph up to `k` hops from a seed table to surface related tables that vector search alone would miss. • Adds `OntologyGraphTool.expand_from` as a non-agent entry point to the same FK graph walk, enabling flat NL→SQL pipelines (which have no agent loop) to benefit from the same join-discovery traversal. • Adds a self-correcting NL→SQL agent (`sql_agent.py`) that iteratively calls `search_tables`, `get_table_schema`, `generate_sql`, and `execute_sql` — SQL execution is gated on an opaque handle returned by `generate_sql`, preventing arbitrary SQL from running. • Adds `@pk` and @fk(...) constraint tags parseable inside Athena column comments, enabling primary- and foreign-key metadata to travel through the Athena federation protocol (which has no native key-constraint field) and produce the same `PrimaryKey`/`ForeignKey` records as the JDBC path.

Context Ontology Accelerator v0.2.1

Thu, 20 Aug 2026 19:11:33 GMT

v0.2.1 adds a CloudWatch dashboard for the scan/enrichment pipeline and pagination support to the `list_metrics` MCP tool. • Adds `nextToken` pagination parameter to the `list_metrics` MCP tool, alongside renamed parameters `namespaceId` and `maxResults` (max 1000). • Adds a CloudWatch dashboard for the structured scan and enrichment pipeline, sourcing custom metrics from sources Lambdas via EMF-stdout. Breaking changes: • The `list_metrics` MCP tool parameters `namespace_id` and `max_results` are renamed to `namespaceId` and `maxResults`; any caller passing these by keyword name will break.

Context Ontology Accelerator v0.2.0

Thu, 13 Aug 2026 16:42:10 GMT

v0.2.0 adds Redshift Serverless as an alternative query engine and new CloudWatch guardrail observability metrics. • Adds `executionEngine=REDSHIFT` + `redshiftWorkgroup` onboarding parameters to route Glue-backed sources through Amazon Redshift Serverless via the `redshift-data` API instead of Athena, with automatic Trino→Redshift SQL transpilation and `awsdatacatalog."".""` reference rewriting. • Adds guardrail observability under the `COA/Guardrails` CloudWatch namespace, emitting `GuardrailInvocations` (Count), `GuardrailBlocked` (Count), and `GuardrailLatency` (Milliseconds) metrics with support for both `transport="put"` (PutMetricData, used by ECS Fargate kg-build/enrichment/ontology tasks) and Embedded Metric Format via CloudWatch Logs. • Adds `SQLFirewall.validate` enforcement and dialect-aware LIMIT injection to the Redshift execution path, restricting queries to SELECT-only and preventing large scans from fully materializing. • Introduces `CatalogConstraint` and `parse_referred_column` imports alongside deterministic IRI minting via `table_identity` and `_name_discriminator` (SHA-256-derived 8-char suffix) for stable cross-run ontology graph generation.