schema

DE//AGENT currently lists 6 resources under schema: 2 tutorials, 1 skill, 1 hook. Everything below is derived from the live registry — counts, capabilities, verification state and security posture come from the curated records, never from marketing copy.

Also present: 1 agent, 1 reference.

Documented learning objectives across these resources:

• Apply backward/forward compatibility rules to a diff — via Schema Change Contract Review
• Detect a breaking change hidden behind a "safe" rename — via Schema Change Contract Review
• Write a deprecation plan with dates — via Schema Change Contract Review
• Name Avro's four moving parts — schema declaration, evolution rules, encoding, container format — via Avro and schema evolution for event payloads
• Explain why schema evolution rules belong to the schema registry — via Avro and schema evolution for event payloads
• Place Avro against Parquet and Arrow in the format family — via Avro and schema evolution for event payloads
• Classify each schema change as compatible, risky, or breaking — via Review a schema change against its contract
• Resolve the consumer impact set from lineage — via Review a schema change against its contract

1 more objectives live on the individual resource pages.

These resources map to stages: Foundations (2), Data Quality (4). Follow the four-phase roadmap to place this topic inside a progression instead of learning it in isolation.

Every entry, its shape and its trust state — sorted by the registry's composite score. This table is the honest version of a marketing comparison: no sponsored placements, no unverifiable claims.

How scores are computed: source quality score.

Highest composite score first:

1. Schema Change Contract Review score 40.5 — intermediate
2. Avro and schema evolution for event payloads score 34.15 — intermediate
3. Review a schema change against its contract score 34.15 — intermediate

Scores rank provenance, completeness and trust — read how verification works before adopting anything.

Security-flagged entries: Schema Change Contract Review (1 flag), Schema Reviewer (1 flag), Schema Change Check (2 flags). Flags mean the record declares capabilities like credential use or write access — read the security posture on each page before connecting.

• Schema Change Contract Review — Diffs an old and new schema, classifies the change (compatible / risky / breaking) against consumers, and produces the migration and comms plan. details
• Avro and schema evolution for event payloads — Event payloads change while consumers keep running. Avro's answer is a schema declared next to the data, evolution rules carried by the schema registry, and a container format used… details
• Review a schema change against its contract — Run the Schema Reviewer's four-step pass over a producer's schema diff — classify each field change, resolve consumers from lineage, emit a dated migration plan — and use the schem… details
• Schema Reviewer — Classify schema changes and prevent breaking changes from shipping. details

Real install commands from the registry — read the source before running any of them:

npx de-agent-platform add schema-change-contract-review

Schema Change Contract Review — review first

Adjacent topics: contracts (4 shared), tutorial (2 shared), migration (2 shared).

Study path: the roadmap places this topic in a progression · the scoring model explains the numbers · the trust rule catalog shows every security check these entries passed through.