A plugin owning a standalone open/close bracket cannot tell a dead marker from a live one: an unmatched `compact/start` reads identically whether the previous writer died mid-compaction or a compaction is running now. `Session.firstLiveSeq` already holds that answer exactly, but only in memory. Append the log-only `session/inherited` event at that seq from the seeded constructor — the single waist all six seeded-start paths pass through (resume, configured startup on a persisted id, `sessions.fork()`, a subagent fork child, `adopt()`'s live prefix, and a bare seeded `create`). Read it through the new `isInheritedSeq(events, seq)`. The constructor placement means persistence needs no changes: the marker is already in `events` when a backend captures the creation seed, so it rides the ordinary seed path with no load-time write. It also covers fork, where the inherited bracket's owner may still be running — the case a persistence-layer boundary could not reach. Activity ordering excludes the boundary through `lastActivityTime()`, since lazy resume makes browsing a pickup and the three call sites would otherwise float every opened session to the top of a picker or list.
llm/ — LLM capability family
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The LLM seam and its provider adapters. The interface package (llm) owns the abstract service, the content-block vocabulary, and the stream-chunk assembler; the adapters are concrete implementations that register on ctx.llm. All product packages.
| Package | Role | ctx key |
|---|---|---|
llm/ |
Abstract LLM service + content-block vocabulary + chunk assembler | ctx.llm |
token-meter/ |
Replay-aware request and surface token measurement | ctx.tokenMeter |
llm-retry/ |
Exact-provider normal or unbounded request retry policy | (listens to agent/request-error) |
llm-deepseek/ |
DeepSeek API adapter (direct fetch + eventsource-parser SSE) | (registers on ctx.llm) |
llm-pi-ai/ |
Multi-provider adapter via @earendil-works/pi-ai |
(registers on ctx.llm) |
The interface lives at llm/llm/; adapters, retry policy, and the reusable token meter are flat siblings under the group. Requests route by provider, while model is passed through to the selected adapter. The route-owning adapter supplies retry policy and resolves available exact-model identity, context capacity, and reasoning metadata; the retry executor and token meter remain provider-agnostic. A new provider adapter registers one or more provider routes on ctx.llm without touching the consumers. See twin LLM adapters for the two shipping implementations, the replay token meter Agent Note for measurement ownership, and the routed model context Agent Note for capacity and compaction-policy ownership.