[leehack]

Summary

• Compatibility PR: widen genkit_llamadart to llamadart: ^0.19.0, qualified against published core 0.19.0 (version stays 3.7.0; changelog under Unreleased) (#1813, same flow as #1747).
• Update the lower-bound pin ([email protected]) in CI and the Genkit publisher, the CI selection test, package README/CONTRIBUTING/migration/tool-schema docs, the package changelog, a "planned, not published yet" note in integrations/genkit.md, and maintainers/genkit-package.md.

Production-readiness scope

• User-facing scope: Genkit users can adopt core 0.19.0; no plugin API change.
• Supported platforms/paths: Existing adapter paths against published core 0.19.0; Flutter iOS/macOS use matching 0.19.x companions.
• Unsupported or intentionally unavailable paths: Unchanged; core's typed LlamaUnsupportedException paths pass through.
• Out of scope / follow-ups: None. Core and Apple companion versions untouched. Next steps, as 3.7 (#1780 → #1799 → #1803): two-file 3.8.0 release-prep PR with maintainer approval (publishes), then the website docs pairing after publication. This PR does not publish.

Completeness checklist

• Declared scope is fully implemented, or explicitly reduced above.
• Unsupported platform/option combinations fail loudly with actionable diagnostics or are clearly documented as unavailable. (unchanged)
• Public API docs, README/website docs, examples, support matrices, and changelog entries are updated where relevant.
• Regression coverage covers the original issue plus key negative/version-skew paths where relevant. (existing adapter suite and CI lower-bound leg)
• Validation coverage registry: N/A, no capability change.
• Security/privacy review completed: no secrets or paths touched.
• Follow-up work: None.

PR type guidance

• Feature PR: N/A, dependency/compatibility bump.

Test Plan

• dart run tool/prepare_workspace.dart
• dart format --output=none --set-exit-if-changed .
• dart analyze N/A for root (no root Dart change); package: dart analyze --fatal-infos clean
• dart test -p vm -j 1 --exclude-tags local-only N/A, no core change; ran test/unit/tooling/ci_workflow_selection_test.dart and package_skills_test.dart (pass)
• dart test -p chrome --exclude-tags local-only N/A, no core change
• coverage-lib N/A, no lib/ change
• Package lanes in packages/genkit_llamadart (Flutter 3.47.1, hosted llamadart 0.19.0): dart pub get, format, dart analyze --fatal-infos, python3 .github/check_docs.py, dart test -x real-model (471 passed), staged dart pub publish --dry-run (0 warnings); verify_release_docs_versions.dart passes

Matrix Evidence

Matrix row	Scope covered	Platform / model / backend	Result	Evidence / notes
genkit package lanes	analyze, docs, unit, publish dry-run	macOS, Dart 3.12+, hosted core 0.19.0	Pass	above
lower-bound, local-core, real-model, browser	CI adapter job legs	CI	See CI	real-model/model-backed checks run only in CI leg

Review Notes

• Independent review status: PASS. Fresh agent session (independent-audit-session-1816, not the author) audited exact head 1903ae9: zero blocking findings, zero PR-caused P1. Merging publishes nothing: release_genkit_on_prep_merge.yml needs a release/genkit_llamadart-v... head or the release-prep:genkit_llamadart label, and release_on_prep_merge.yml needs release-prep plus a root pubspec change.
• Audit commands: package lanes (format, dart analyze --fatal-infos, check_docs.py, 7 Python tests, 471 unit tests, lower-bound in-place analyze + 471 tests, staged publish dry-run with 0 warnings); root prepare/format/analyze, tooling suite (only 6 environmental pwsh-missing windows_registry failures), verify_release_docs_versions; merged-tree (head + e8201c800) markdown suites, ci_workflow_selection_test and genkit_llamadart_floor_pin_test (773 pass).
• Mutations killed: ci.yml pin to 0.18.0 fails ci_workflow_selection_test ("Genkit lower bounds pin...") and genkit_llamadart_floor_pin_test; publish_genkit_pubdev.yml pin to 0.18.0 and package floor ^0.18.0 fail genkit_llamadart_floor_pin_test.
• Readiness evidence (high_risk_readiness.dart, schema v2): unverifiedPrerequisites, exit 2 (internally consistent; external prerequisites are unconfigured by design).
• CI status / head SHA: 1903ae9, CI run 42519498390 green, including Genkit (lower bounds and published) and Genkit (local core: 471 unit, 10/32 real-model, 122 browser).
• Base: evidence is bound to merge base 60821c1. main has since moved to e8201c8 (#1817); it shares no files with this PR, mergeStateStatus is CLEAN, and the merged-tree check above passed.

High-risk regression review

• Classification: high-risk (artifactConsumer, regressionPolicy, releaseAutomation)
• Implementation task: this PR
• Independent blocking QA task: independent-audit-session-1816, PASS at exact head
• Exact head / current base: 1903ae9 / merge base 60821c1 (origin/main now e8201c8, no shared files)
• Production-branch deletion, bypass, or miswire proof: N/A, version pins only; pin mutations killed by the tests above
• Affected-family real-model/artifact evidence: CI run 42519498390, Genkit local core real-model leg 10/32 (pinned fixture subset), green
• Explicit unavailable-family or other N/A evidence: N/A
• Known PR-caused P1 regressions: 0
• Unresolved review threads: 0

[github-actions]

Chat app preview removed for leehack/llamadart-chat-pr-1816.