- Add scripts/codegen/java.ts - Java code generator from session-events and api schemas
- Add scripts/codegen/package.json with @github/copilot dependency
- Add scripts/codegen/package-lock.json
- Generate src/generated/java/com/github/copilot/sdk/generated/ - 76 session event files
- Generate src/generated/java/com/github/copilot/sdk/generated/rpc/ - 111 RPC type files
- Update pom.xml: add build-helper-maven-plugin, exclude generated from Spotless
- Update config/checkstyle/checkstyle.xml: exclude generated packages
- Update .gitattributes: mark src/generated/java/** as generated
- Add .github/workflows/codegen-check.yml - CI check workflow
- Add .github/workflows/update-copilot-dependency.yml - update workflow
- Update docs/WORKFLOWS.md with new workflow documentation
- Update .gitignore to exclude scripts/codegen/node_modules/"

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Co-authored-by: edburns <75821+edburns@users.noreply.github.com>

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…ger, @JsonCreator

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Co-authored-by: edburns <75821+edburns@users.noreply.github.com>

… Object fallbacks

The code generator (scripts/codegen/java.ts) had two gaps identified
during report-card grading against the Epic #69 rubric:

1. Silent Object fallbacks: When schemaTypeToJava() fell back to
   List<Object> (untyped array) or Map<String, Object> (untyped object
   without properties or additionalProperties), it did so silently.
   Added console.warn() at both sites so type erasure is visible during
   generation, matching the existing warnings for anyOf and unrecognized
   schema patterns.

2. Missing @JsonInclude(NON_NULL) on outer event classes: The annotation
   was present on inner data records and RPC records but missing from
   the SessionEvent sealed base class and all outer event variant
   classes (e.g., AssistantMessageEvent, ToolExecutionStartEvent). Added
   the import and annotation to generateSessionEventBaseClass() and
   generateEventVariantClass().

After regenerating, all 75 session event files and 111 RPC type files
were updated. mvn verify passes with 556 tests, 0 failures, 0 errors.

Replace hand-written com.github.copilot.sdk.events package with
auto-generated com.github.copilot.sdk.generated types.

- Replace AbstractSessionEvent with SessionEvent from generated package
- Replace SessionEventParser with Jackson native polymorphic deserialization
- Update all main source and test files to use generated types
- Adapt ForwardCompatibilityTest to remove getOriginalType() tests
- Update type assertions for renamed data records (FooData -> FooEventData)
- Fix enum type comparisons in tests (elicitation mode, shutdown type, etc.)
- Update site documentation to reference generated package
- Delete old events package

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: edburns <75821+edburns@users.noreply.github.com>

The migration commit (da9ec9c) replaced com.github.copilot.sdk.events
with com.github.copilot.sdk.generated across all src/ files but missed
four non-source files that still referenced the old package:

1. jbang-example.java — updated imports from events.AssistantMessageEvent
   and events.SessionUsageInfoEvent to generated equivalents.

2. README.md — updated Quick Start imports to use generated package.

3. .github/copilot-instructions.md — updated Package Structure section
   to describe com.github.copilot.sdk.generated instead of the deleted
   com.github.copilot.sdk.events package.

4. config/spotbugs/spotbugs-exclude.xml — changed SpotBugs exclusion
   from com.github.copilot.sdk.events to com.github.copilot.sdk.generated,
   and updated the comment to match.

Also renamed SessionEventParserTest.java to SessionEventDeserializationTest.java
(class name updated to match) since the test no longer exercises the deleted
SessionEventParser class — it tests Jackson-native deserialization via
ObjectMapper.readValue(json, SessionEvent.class).

Build verified: 553 tests, 0 failures, BUILD SUCCESS.
were updated. mvn verify passes with 556 tests, 0 failures, 0 errors.

…chema.json

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…see session.idle

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