[brsbl]

Playgrounds gains concise launch copy, “Free plugin for bb”, and linked credit to Anatomy by Ryan (@wheresryan22). Privacy and bb 0.46 / SDK 0.6.37 requirements are included. The hero placeholder is removed; the clip comes in a later listing update.

Gated for Release’s October 28 batched QA. Do not merge. brsbl’s QA on this exact head is the approval; Release owns the merge.

Verification

Head: 63f671882f95164c1fc40ac89f30c1babceee6e1 · Reviewed base: 2ce00d2871b8932e85576d7f670b59d16be97ea6.

• Remote CI passed again, including Playgrounds and the complete install-ref inventory.
• Clip acceptance passed again on Linux and macOS.
• Full Slop Cop passed: security, architecture, code quality, performance, and the fresh isolated E2E. No P0–P2 findings.
• Fresh isolated E2E passed in Chrome for Testing 155.0.8059.39 at 1440×900, DPR 2; no browser exceptions or console errors.

The E2E installed and enabled the CI artifact into an empty task-local data directory. Real inputs produced $69/person and $276 total, persisted after reload, and remained independent from a saved library copy. HTML Next/Back worked. The quick Anatomy figure passed slider endpoints, zeroing, movement, agent setParams, and reload persistence. The rendered overview contains the linked Ryan credit and requirements, with no hero placeholder. Live frame sandbox, blocked connections, and no-referrer policy matched the privacy copy.

Fresh source QA captures

These are verification captures from this PR’s CI artifact, not replacement marketplace assets. The overview uses a local catalog rendering fixture containing the artifact’s exact overview text. Its visible source-ID warning is expected: the running artifact is installed from a local path, while the rendering fixture names the public Git source. The installed plugin was independently verified enabled and running.

State	Fresh capture
Overview with no hero placeholder
Quick Anatomy after agent control
Calculator after real input
HTML Next/Back

What brsbl should check on October 28

Review the plain sentence, free-plugin line, linked Ryan credit, privacy and requirements; confirm there is no placeholder. Move and zero the quick figure, then ask the agent to change it. Edit and reload the calculator, check saved-input independence, and try Next/Back in the guide.

Exact artifact and isolation evidence

• CI merge candidate: 668fac2bc4742a99db5bf9e6aebb055df236f36e, combining base 571213ce796f1af715961a7f0e92ab9e3d8a543a with the exact PR head above.
• Standalone CI install artifact: 50074e2bcd8f261d917edf3f98c2e3aa52a0d97c. Its overview equals the PR head byte-for-byte; its runtime includes the already merged base progress changes.
• bb source: 4363ba27d6f942d6b42ae61c8f85800e756b9085. Fresh data directory, separate ports, no production data copy or desktop app.
• Every QA CLI call explicitly selected the isolated server and verified its data directory before writes.
• Host-care job job_346c7e71a98e449f83e9d847a87caf49 owned the server, headless browser, and E2E. It completed with exit 0; its owned descendants were cleaned up.
• Preserved QA thread: thr_sf2igcnfeg; project: proj_bmq6tv25f8. Task-local evidence and data remain available to restore the exact preview for Release.
• The marketplace listing is now owned by Release’s batch worker. This is only Prepare Playgrounds launch overview and listing evidence #470’s source gate; no #623 gate is claimed.

BB-Thread-ID: thr_z9q43chekf

[brsbl]

Superseded by #527, which ships this change together with the other plugins in one release. This PR's exact head is merged into #527 unchanged. The branch is kept.