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pi-durable has no telemetry hooks, so `piDurableIntegration` wraps the `models` and `registry` passed to `Harness.open()`. Each run becomes its own `invoke_agent` trace with `chat` and `execute_tool` children, and a subagent run nests under the tool call that started it. Messages are mapped to the gen_ai conventions, and the system prompt and tools are read from pi-durable's positional system messages. Tool spans record the result the model receives. Failures pi-durable only reports, and faults of any task, are captured. Failures of the built-in coding tools are not, because they report expected results to the model. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Adds
piDurableIntegrationfor@earendil-works/pi-durable, Earendil's new durable agent harness. It is on by default in Node. Each run becomes its owninvoke_agenttrace withchatandexecute_toolchildren, and a subagent run nests under the tool call that started it.pi-durable has no telemetry hooks (
pi-telemetryexists, but no pi package emits spans through it yet), so the integration hooksHarness.open()and wraps themodelsandregistryit receives.Decisions worth a look:
pi.generationtask after every tool round, so no single task spans a run. The run span ends when the commit that removespi.live.rungoes through.gen_ai.conversation.idis<harness id>:<conversation id>. pi-durable numbers conversations per storage from 1, so the bare id would merge every root conversation into one. The cost is a new id after a restart, until pi-durable has a stable storage id.api.output()(all ofbash) and results anafterToolhook redacted.onReport(throwing hooks or sections) and faults of any task are captured. Throws from the built-incoding-toolsextension are not, becausebashthrows for every non-zero exit, a normal result for a coding agent. The span keeps its error status.Messages go through the pi-ai mapper from the Flue fix, and the system prompt and tools are replayed from pi-durable's positional system messages.
Not covered yet: deferred model responses, spans for tool calls pi-durable answers without running
execute(), runs interrupted byharness.close(), spans for custom tasks, agent names, and Cloudflare Durable Objects.🤖 Generated with Claude Code