Task: Integrate default child-friendly replies installation

Identity

Integrate verified default-install source e70b6eab91b71c6149a96fa9cd5974d8706417ba into the primary MakeLore checkout on local main, and promote its accepted current-state facts.

User explicitly approved handing over D:\Datas\OthersProjects\makelore and merging the client source, preserving three existing untracked task records. Bundled release --force released completed owner 20260928-merge-teacher-cards-a09c07f3; bundled start --mode integration --adopt-existing and exact status verified this task, mode, main branch, primary path, recorded base, exclusive integration lock and adopted foreign states.
Project Context Loaded: entry, own/source records and current-state refreshed; reuse previously loaded memory index, positioning, decision, architecture, domain, success/evidence context and 135 peer scopes at unchanged efff238a base. Historical template sections remain unknown coordination state; old Marketplace scopes preserve the same contracts and no semantic conflict blocks this merge. Planning and Integration Gates passed before editing.
Preserve source records and all three foreign files read-only. No subagents. Default installation preserves existing signature trust, account isolation, explicit opt-out and separate project/Agent controls. Companion server task 20260928-default-child-replies-06693309 owns Release readiness repair.

Fast-forwarded local main from efff238a75c1eaba20dba8ae505f47dbea8ba131 to e70b6eab91b71c6149a96fa9cd5974d8706417ba without conflicts.
Session activation and Library refresh acquire/install the signed server child-friendly Skill by default; existing installed packages are reused, unavailable downloads retry later, and explicit removal/uninstall prevents automatic reinstallation. Queued account operations retain account isolation and honor removal during installation.
Promoted accepted source behavior and cross-repository rollout requirements to current-state. Source README already describes the product behavior. No architectural conflict or new product decision is introduced.

Source: 70 relevant unit tests passed; six default-install cases cover reuse, opt-out, unsigned deferral, failure retry, account switch and pending-install removal. Additional composition checks passed (partially overlapping coverage).
Standard typecheck, changed-file ESLint and Vite production build passed. Electron Installed-tab/default-plugin plus optional acquisition scenario passed; its Main API fixture validates display rather than a live production download.
Primary-checkout product/tests and imported source record match the tested source. Only integration-owned documentation is added, so no redundant test rerun is needed. Three adopted foreign records remain unchanged and uncommitted; task-aware drift check completes the documentation gate.

Ship the new client alongside Works Square startup-signing fix c9ff8a4f5b0be50858842d9627608987a8a883d0. The live descriptor was unsigned at diagnosis; no live production signing, push, packaging, deployment or installed desktop update occurred here.
Retain the source worktree pending explicit post-merge cleanup authorization; preserve its branch and commit.

Accepted: signed Marketplace default installation with persistent user opt-out, independent project/Agent controls and coordinated rollout. Recorded in current-state Integrated Through with source provenance; source task records remain read-only.