[leehack]

Summary

• Example apps (chat_app, laya_tetris, laya_command_bar) now declare flutter: ^3.38.6; example/README.md and example/chat_app/README.md say 3.38.6. They depend on core llamadart (sdk: ^3.10.7), and 3.38.6 is the first Flutter with Dart 3.10.7.
• True floor of chat_app: 3.38.6. Its lock's dart: ">=3.11.0-0" comes from the Flutter SDK's own packages (flutter, flutter_test, integration_test declare ^3.11.0-0 in the SDK that generated the lock, 3.47.1), not from a hosted dependency: every hosted package in the lock declares at most ^3.10.x, and audioplayers/synchronized are pinned below the versions that need Flutter 3.44 / Dart 3.11. Locks are unchanged by prepare_workspace.

Refs #1837 #1845

Production-readiness scope

• User-facing scope: Example apps and their READMEs state the floor that actually resolves.
• Supported platforms/paths: Flutter examples; docs.
• Unsupported or intentionally unavailable paths: Flutter 3.38.0-3.38.5 already failed pub resolution (core needs Dart 3.10.7); now declared up front.
• Out of scope / follow-ups: None. CONTRIBUTING.md floor is in the sibling PR (it is high-risk-classified).

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. (N/A: tooling/docs only)
• Public API docs, README/website docs, examples, support matrices, and changelog entries are updated where relevant. (changelog N/A: not user-visible)
• Regression coverage covers the original issue plus key negative/version-skew paths where relevant.
• Public capability changes update the validation coverage registry. (N/A: no capability change)
• Security/privacy review completed: no secrets, tokens, signed URLs or secret-bearing paths added.
• Follow-up work is tracked in GitHub Issues, or marked "None" above.

PR type guidance

• Docs-only PR: no runtime behavior change; pubspec constraint raised to what already resolved. Validated with the markdown-selected root suites and prepare_workspace.dart (all example packages resolve).

Test Plan

• dart run tool/prepare_workspace.dart (no tracked lock changes)
• dart format --output=none --set-exit-if-changed .
• dart analyze
• Markdown-selected root suites (tool/ci/markdown_test_suites.txt)
• dart test -p chrome -- N/A: no code
• coverage-lib -- N/A: no lib/ change
• Other: example apps' own tests -- N/A: constraint-only change, CI example lanes run them

Matrix Evidence

Matrix row	Scope covered	Platform / model / backend	Result	Evidence / notes
static-format-analyze	format, analyze	macOS, Flutter 3.47.1	Pass	clean
markdown suites	docs wording tests	macOS VM	Pass	729 tests

Review Notes

• Independent review status: N/A for trivial constraint/docs change
• CI status / head SHA: pending / 46d7e228

High-risk regression review

• Classification: standard
• Implementation task: N/A
• Independent blocking QA task: N/A
• Exact head / current base: N/A
• Production-branch deletion, bypass, or miswire proof: N/A
• Affected-family real-model/artifact evidence: N/A
• Explicit unavailable-family or other N/A evidence: N/A
• Known PR-caused P1 regressions: 0
• Unresolved review threads: 0

[leehack]

Landed through the 0.19.2 batch integration PR #1870 (rebase merge, one commit per constituent; this PR's pinned head was audited/CI-gated there).

[github-actions]

Chat app preview removed for leehack/llamadart-chat-pr-1848.