[KaiEureka]

Resolve nineteen reproducible defects found in the OpenCollab runtime audit. The repairs cover shared workflow budgets, session snapshots, authored child workflows, message persistence and conversion, context summarization, Git checkout handling, CLI interruption and Weave verification and continuation.

Parent workflows account for candidate sessions while they are running. Snapshots retain hard and soft allowances, budget decisions, Scout submission settings, workspace bindings and workflow-tool ownership. Effective submission reserves survive a later soft-budget decrease and subsequent direct or policy-driven expansion. Fresh configuration validation remains in place. Closing a source or branch ends its own authored work, and copied environment callbacks use the current environment and role.

Native workflow snapshots copy mutable configuration independently and start fresh observation state, leaving source tracing, subscriptions and autosave with their owner. Factory-owned model transports remain open until the last owning session or snapshot closes. Failed snapshot construction acquires no ownership reference, and externally supplied models retain caller-owned cleanup.

Authored workflows forward binary stdin in worktree isolation and settle startup failures through the existing cleanup path. Large internal results and session artifacts use checked artifact transfer. Developer messages survive autosave, journals, exports and subsequent turns, including native Anthropic continuation and Responses-to-Anthropic restoration. Their conversion preserves the established system projection, chronological compaction records and content validation. Truncated model summaries use the existing recovery behavior while retaining history and avoiding the summary cache.

Git accepts explicitly disabled sparse-checkout settings. Interrupted CLI turns decline subsequent interactive questions without consuming fresh input. Weave executes supported echo-prefixed checks, obtains per-target pytest evidence for ordinary quiet invocations and accepts the original run identity for continuation. Existing verification rules and resource cleanup behavior remain covered by regression tests.

Workflow collections preserve exception objects returned as per-item diagnostic data, allowing successful sibling work and final summaries to complete. Actual thrown errors are recorded separately by input position. Budget errors retain priority, and other terminal errors retain input order. Ordinary raised business errors, queue admission and cancellation cleanup keep their existing behavior.

Validation uses native OpenAI Chat, Responses and Anthropic SDK transports with local HTTP substitutes, real files and Git worktrees, child processes, terminal interaction and installed-package checks. Independent snapshot and provider review passed 219 snapshot tests and 132 provider tests on each of Python 3.12 and 3.14. Separate behavior probes cover soft-budget changes, exhausted and unbounded allowances, independent branch settings, developer save/load, provider transfer, actual file tools and message chronology. All probe-owned models, clients and environments closed.

The latest aggregate commit is 3a0b4ff9. The 996-case regression set passed against the same runtime and test files as this head. Cleanup lifecycle tests now synchronize session entry before cancellation, retaining actual quiescence, late-write and tracer-order assertions across variable startup times. The lifecycle suite passed 139 cases on Python 3.12, 3.13 and 3.14, and independent delayed-start and negative controls verified the assertions. Whole-repository Ruff, import constraints, dependency checks, translation synchronization, whitespace checks and the existing proposed-history scan pass. Complete CI verification passed on this head. Python 3.10 passed 10,407 tests with 76 skips. Python 3.11, 3.12, 3.13 and 3.14 each passed 10,408 tests with 75 skips. Distribution artifacts, macOS platform integrity and browser fixtures also passed.

The focused repair commits retain human authorship through merge commits. This PR supersedes #256, #258, #259, #260, #261 and #262.