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feat(invariants): require package-owned companions

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Tianyi Cui
2026-07-19 22:13:50 +08:00
parent 2c7822ddee
commit 433670a754
316 changed files with 5348 additions and 646 deletions
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docs/core-data-structures/session.md
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@@ -502,7 +502,7 @@ interface TurnEndReasonMap {
## The turn-enclosure invariant
Every session event lives **inside** a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, and an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn. This makes the turn the single durability/replay boundary: a backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The optional `dsh-session/invariant` companion enforces it in dev through `ctx.invariants` (a message event outside an open turn throws). See [the turn-enclosure invariant RFC](../rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md).
Every session event lives **inside** a turn (between a `turn/start` and its `turn/end`). The loop appends queued `user/message` events *after* `turn/start`, and an idle `agent.inject()` wraps its `context/message` in a one-shot `injection` turn. This makes the turn the single durability/replay boundary: a backend can treat anything after the last `turn/end` as an interrupted-crash tail without risking the loss of legitimately-recorded between-turn context. The `dsh-session/invariant` companion enforces it when selected through `ctx.invariants` (a message event outside an open turn throws). See [the turn-enclosure invariant RFC](../rfc/implemented/architecture/2026-06-15-turn-enclosure-invariant.md).
## Plugin-contributed log-only events