[leehack]

Summary

• The image-generation guide's module placement section said Vulkan had not been measured. It now says placement was measured with SD-Turbo on one Linux x64 Vulkan Tesla T4, which matches the 0.17.0 release notes and the support matrix (#1551). Two-GPU hosts and the larger models remain unmeasured. This follows up the #1585 audit (P3).

Production-readiness scope

• User-facing scope: docs wording only.
• Supported platforms/paths: docs only.
• Unsupported or intentionally unavailable paths: N/A, wording only.
• Out of scope / follow-ups: None. The frozen version-0.17.0 snapshot keeps the old line; that is versioned docs, which stay as published.

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, docs only.)
• Public API docs, README/website docs, examples, support matrices, and changelog entries are updated where relevant. (No changelog entry, docs wording only.)
• Regression coverage covers the original issue plus key negative/version-skew paths where relevant. (N/A, docs only.)
• Public capability changes update the validation coverage registry with a pack or a reasoned, issue-linked exemption; inventory checks pass (or N/A with scope). (N/A, no capability change.)
• Security/privacy review completed: no secrets, bearer tokens, signed URLs, or raw secret-bearing paths leak through logs, cache keys, metadata, errors, or snapshots.
• Follow-up work that is useful but not required for this PR is tracked in GitHub Issues, or explicitly marked "None" above.

PR type guidance

• Docs-only PR: no runtime behavior changes. CI's docs build checks links.

Test Plan

• dart run tool/prepare_workspace.dart: N/A, docs only.
• dart format --output=none --set-exit-if-changed .: N/A, Markdown only.
• dart analyze: N/A, docs only.
• dart test -p vm -j 1 --exclude-tags local-only: N/A, docs only.
• dart test -p chrome --exclude-tags local-only: N/A, docs only.
• Other targeted/local-only validation: CI docs build.

Matrix Evidence

Matrix row	Scope covered	Platform / model / backend	Result	Evidence / notes
N/A	docs wording	N/A	N/A	Matches the evidence that the #1585 audit cited (#1551, Tesla T4 run).

Review Notes

• Independent review status: N/A, trivial docs-only change.
• CI status / head SHA: pending.

High-risk regression review

• Classification: standard
• Implementation task: N/A
• Independent blocking QA task: N/A
• Exact head / current base: N/A

[github-actions]

Chat app preview removed for leehack/llamadart-chat-pr-1586.