Fix async injection tool-result ordering
This commit is contained in:
Hypatia May
@@ -96,7 +96,7 @@ forever:
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The loop renders one prompt assembly per step. Plugins contribute ordered sections, tool schemas, and `{{name}}` variables; unknown or valueless references fail the turn instead of shipping a hole. `dsh-system-prompt` owns the harness identity and default deployment persona; an agent-scoped persona may shadow the default. The loop supplies `model` and `cwd`. See the [prompt-ownership RFC](rfc/implemented/architecture/2026-07-05-prompt-variables-and-tool-guidance-ownership.md).
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Post-tool context lands after all tool results so tool-call/result adjacency stays stable. Steering drains between steps; ordinary leftover steering after a turn is re-queued as input. A terminal `agent/turn-stop` is the explicit exception: it runs after ordinary continuation and steering folding, then remains authoritative through turn close and flush so steering from those later listeners is discarded rather than becoming another step or turn; ordinary queued prompts are preserved.
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Context that arrives while tool results are pending—including asynchronous `agent.inject()` notices and post-tool `additionalContext`—lands after the complete result batch so tool-call/result adjacency stays stable. Steering drains between steps; ordinary leftover steering after a turn is re-queued as input. A terminal `agent/turn-stop` is the explicit exception: it runs after ordinary continuation and steering folding, then remains authoritative through turn close and flush so steering from those later listeners is discarded rather than becoming another step or turn; ordinary queued prompts are preserved.
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### Failure Boundaries
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@@ -23,7 +23,7 @@ A fully configured agent and live session were published. Setup is composition-o
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:139`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:140`](../../packages/core/agent/src/types.ts)
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### `agent/disposed` — emit
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@@ -35,7 +35,7 @@ An agent left the registry; AgentLoop emits this after driver quiescence but bef
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:148`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:149`](../../packages/core/agent/src/types.ts)
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### `agent/error` — emit
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@@ -47,7 +47,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:283`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:284`](../../packages/core/agent/src/types.ts)
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### `agent/pre-step` — serial
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@@ -59,7 +59,7 @@ Awaited serial checkpoint for session-surface mutation after prompt assembly and
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Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:202`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:203`](../../packages/core/agent/src/types.ts)
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### `agent/prompt-submit` — waterfall
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@@ -71,7 +71,7 @@ Allow, rewrite, or block one drained prompt before it becomes a user message. Ca
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Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:212`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:213`](../../packages/core/agent/src/types.ts)
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### `agent/queued` — emit
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@@ -83,7 +83,7 @@ Detached, frozen content entered the agent's inbox. Source defaults have already
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Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:167`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:168`](../../packages/core/agent/src/types.ts)
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### `agent/request` — waterfall
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@@ -95,7 +95,7 @@ Replace the frozen call configuration. Model-visible content must use logged cha
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Types: [Agent](../core-data-structures/core.md) · [LlmCallConfig](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:224`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:225`](../../packages/core/agent/src/types.ts)
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### `agent/session-prefix` — waterfall
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@@ -107,7 +107,7 @@ Compose request-only messages placed before derived history. The frozen result i
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Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:239`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:240`](../../packages/core/agent/src/types.ts)
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### `agent/session-start` — emit
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@@ -119,7 +119,7 @@ The session lifecycle began, once before the first turn. Use `agent.inject()` to
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Types: [Agent](../core-data-structures/core.md) · [SessionStartSource](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:180`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:181`](../../packages/core/agent/src/types.ts)
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### `agent/status` — emit
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@@ -131,7 +131,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). `send()` does no
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:157`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:158`](../../packages/core/agent/src/types.ts)
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### `agent/step-result` — waterfall
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@@ -143,7 +143,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va
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Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:250`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:251`](../../packages/core/agent/src/types.ts)
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### `agent/turn-continuation` — waterfall
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@@ -155,7 +155,7 @@ Override whether the turn continues. The default continues after tool calls or s
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:260`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts)
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### `agent/turn-stop` — serial
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@@ -167,7 +167,7 @@ Monotonic terminal-stop checkpoint after continuation and steering are folded; a
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Types: [Agent](../core-data-structures/core.md)
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Source: [`packages/core/agent/src/types.ts:270`](../../packages/core/agent/src/types.ts)
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Source: [`packages/core/agent/src/types.ts:271`](../../packages/core/agent/src/types.ts)
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## `approval/*`
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@@ -7,19 +7,19 @@ This matrix shows which packages dispatch each harness-owned event and which pac
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| Event | Mode | Declared in | Dispatchers | Listeners |
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| --- | --- | --- | --- | --- |
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| `agent/created` | `emit` | [`packages/core/agent/src/types.ts:139`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`jsonrpc`](../packages/ui/jsonrpc), [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/disposed` | `emit` | [`packages/core/agent/src/types.ts:148`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:283`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
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| `agent/pre-step` | `serial` | [`packages/core/agent/src/types.ts:202`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`compact-basic`](../packages/compact/compact-basic), [`user-approval`](../packages/ui/user-approval) |
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| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:212`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`acp`](../packages/ui/acp), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
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| `agent/queued` | `emit` | [`packages/core/agent/src/types.ts:167`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
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| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:224`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
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| `agent/session-prefix` | `waterfall` | [`packages/core/agent/src/types.ts:239`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`tool-skill`](../packages/skill/tool-skill) |
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| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:180`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
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| `agent/status` | `emit` | [`packages/core/agent/src/types.ts:157`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`invariants`](../packages/support/invariants), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard), [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/step-result` | `waterfall` | [`packages/core/agent/src/types.ts:250`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
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| `agent/turn-continuation` | `waterfall` | [`packages/core/agent/src/types.ts:260`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
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| `agent/turn-stop` | `serial` | [`packages/core/agent/src/types.ts:270`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
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| `agent/created` | `emit` | [`packages/core/agent/src/types.ts:140`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`jsonrpc`](../packages/ui/jsonrpc), [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/disposed` | `emit` | [`packages/core/agent/src/types.ts:149`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:284`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
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| `agent/pre-step` | `serial` | [`packages/core/agent/src/types.ts:203`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`compact-basic`](../packages/compact/compact-basic), [`user-approval`](../packages/ui/user-approval) |
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| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:213`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`acp`](../packages/ui/acp), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
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| `agent/queued` | `emit` | [`packages/core/agent/src/types.ts:168`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
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| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:225`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
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| `agent/session-prefix` | `waterfall` | [`packages/core/agent/src/types.ts:240`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`tool-skill`](../packages/skill/tool-skill) |
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| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:181`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
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| `agent/status` | `emit` | [`packages/core/agent/src/types.ts:158`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`invariants`](../packages/support/invariants), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard), [`stdio-agent`](../packages/ui/stdio-agent) |
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| `agent/step-result` | `waterfall` | [`packages/core/agent/src/types.ts:251`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
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| `agent/turn-continuation` | `waterfall` | [`packages/core/agent/src/types.ts:261`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
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| `agent/turn-stop` | `serial` | [`packages/core/agent/src/types.ts:271`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
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| `approval/request` | `waterfall` | [`packages/ui/user-approval/src/index.ts:31`](../packages/ui/user-approval/src/index.ts) | [`user-approval`](../packages/ui/user-approval) (`waterfall`) | [`acp`](../packages/ui/acp) |
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| `fs/edit-intent` | `waterfall` | [`packages/fs/fs/src/index.ts:59`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`waterfall`) | [`fs-policy`](../packages/fs/fs-policy) |
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| `fs/observed` | `emit` | [`packages/fs/fs/src/index.ts:68`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`emit`) | [`fs-policy`](../packages/fs/fs-policy) |
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@@ -18,7 +18,7 @@ In case 2, if the injected `context/message` is the last event before a flush/di
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**Every session event lives inside a turn** — between a `turn/start` and its matching `turn/end`. Concretely:
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- The loop appends queued `user/message` events **after** `turn/start` (inside the turn), not before it. `turn/end` is therefore owed the moment those messages are recorded, and the existing finalizer guarantees it.
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- An `agent.inject()` made while the agent is **running** appends its `context/message` into the already-open turn (unchanged).
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- An `agent.inject()` made while the agent is **running** joins the already-open turn. If assistant tool calls are awaiting results, the accepted context waits in arrival order and appends after the complete result batch so its user-role message cannot split provider tool pairing.
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- An `agent.inject()` made while **idle** wraps its `context/message` in a one-shot turn: `turn/start{trigger:{kind:'injection'}}` → `context/message` → `turn/end{completed}`. A new `injection` variant joins the merge-extensible `TurnTriggerMap`.
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- The loop derives the next turn number from the log each iteration (`lastTurnNumber(session) + 1`) instead of keeping a private counter, so an idle injection's one-shot turn cannot collide with the next real turn's number.
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- The `dsh-invariants` plugin **enforces** the invariant in dev: a `user/message` / `context/message` / `steering/message` appended while no turn is open throws an `InvariantError`.
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