Why: Q1 WP5 - platform's SQLite becomes an implementation of the
squad Store port so run state and orchestration state live in one
database, and platform's in-process execution goes through the
Executor port instead of bypassing it (X6).
Evidence: all five modules go vet clean and go test ok, including
engine-on-SQLite (state in DB, no run-level JSON files, second
engine recovers from the same DB), SQLiteStore round trip, and the
full squad compatibility net.
Impact: runState/hitlGate exported so the port is implementable;
Options.Store wires into engineDeps; leader persistence and
checkpoints route through the port; PrepareWorkspace no longer
writes run-level JSON (st.save owns it); platform RunInProcess
takes squad.Executor (callers updated); serve mounts the engine on
platform's RunStore - single orchestration.db for both.
Refs: Documents proposal 2026-10-07-agent-stack-n1q1i1-plans.md Q1 WP5
Why: Q1 WP4/WP6/WP7 - run persistence goes through a Store port
(FileStore carries the current layout), superstep boundaries write
tiered snapshots with a graph fingerprint for recovery continuity,
and the four hardcoded stop conditions move behind one Termination
registry with And/Or composition.
Evidence: go vet clean; full suite ok including new checkpoint,
continuity-rejection, termination-primitive, grant-cap and the
Q23-updated leader closeout tests; cmd module green with
SweepExpired wired into the sweeper loop.
Impact: runState saves via Store (FileStore unchanged by default);
advance writes sync/async/on_exit checkpoints and Resume rejects
graph-shape changes from the crash window; leader turn cap now
degrades through finalize instead of a bare failure (Q23); manual
repair grants are bounded (Q26); wakeup cap and step timeout read
from the same registry; the dead SweepExpired is now called (Q6).
Refs: Documents proposal 2026-10-07-agent-stack-n1q1i1-plans.md Q1 WP4/WP6/WP7
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