Preserve the V3 system-prompt projection while adopting master’s per-agent frozen-message provenance and frontend performance gates. Keep benchmark workload admission and diagnostics fixes intact, and retain both migration and first-open/reopen lifecycle guarantees.
Generated V0 logs put user surfaces before the first step and cannot migrate to a protected V3 system head without changing chronology. Author native current headers, open the first step before the empty system head and user, keep title sequence references aligned, and supply embedded assistant streams.
Give the preset child a current identified user message. Preserve all paging, geometry, preset assertions and committed historical fixtures. Validated both generators red/green through the source seed reader, one full build, all preset/stats/trajectory browser tests (11), and scoped type-aware lint.
The long-chat builder emitted current V3 with user/message before system/message, so seed restoration rejected its protected head before browser assertions ran. Open the first step and append the system head before the user surface; keep Session-assigned title and tool-result references.
Add an independent seed-reader regression for current version, protected head order, title/tool references and closed turns. Observed protected-head failure before the fix; focused regression and full configured type-aware lint pass. Existing browser scroll assertions are unchanged; full built owner runs follow.
Adopt master’s explicit personaPrefix/personaSuffix configuration in the in-history test harness. The assembly override and all admission assertions remain unchanged; this fixes the typed build integration rather than weakening the tests.
Keep prepared-route in-history append, clear-all, and normalization semantics while adopting named persona prefix/suffix and late environment facts from master. Resolve documentation against the derived system-message history and retain the existing strict migration behavior.
Preserve system/message persistence while adopting named persona prefix/suffix and environment facts after reusable instructions. Resolve the Web assertion against the logged system message, not retired header.system. Keep the existing protected V3 integration PR as the root publication path; no rules are bypassed.
Preserve valid native V3 system heads in resumed fixture seeds and inherit the scanner coverage repair. Regenerate only upper-layer owner-local expected output through the actual loop so fallback title follows header/context. All five affected expected cases pass refresh; no historical Session generation or assertion is weakened.
Tianyi Cui