After review, the seam was only synchronous-complete; the durable/celery-sx runners couldn't
plug in cleanly. Additive fixes (pipeline unchanged): (1) :status branch in run-binding — 'done'
dispatches effects, 'suspended' records the flow + :resume (a durable runner holds it; completion
re-enters as a new activity via pump), 'failed' records + :error for retry/dead-letter. (2) richer
runner env — :ctx (per-activity, via engine :ctx-of) + injected :effects (external-read interfaces,
e.g. a deterministic fetch_followers). (3) dedup by content :id — a cycle is caught by identity,
not just the depth guard. (4) behavior/pump — drain transport.deliver for inbound (peer activities
+ async runner completions), sharing one trace so dedup spans the batch.
behavior 9/9 (+ suspended/failed/dedup/env/pump); full host conformance 580/580.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
giles
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