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feat: implement bounded LLM request recovery

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Tianyi Cui
2026-07-20 03:34:19 +08:00
parent 7cf966fc0e
commit 3b0b0cefeb
115 changed files with 3311 additions and 366 deletions
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10
docs/core-data-structures/session.md
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@@ -435,7 +435,7 @@ declare class Session {
- `context/message` → a user-role message at its chronological position. The default `envelope` is `context`, which wraps content as `<context source="…">…</context>`; `envelope: 'raw'` uses caller-owned framing verbatim. Optional JSON `meta` remains in the event log and is never rendered.
- `steering/message` → a user-role message wrapped in `<steering source="…">…</steering>` at its chronological position.
Everything else (`turn/*`, `step/*`) is structural and does not project into a message. Token usage is observed on `assistant/message.usage` (the step that produced it); an operational error's step number is on `turn/end.reason` for `kind: 'error'`. Because this unreleased format intentionally has no compatibility promise, seed/load validation rejects request headers without provider+model and assistant messages without provider/model provenance instead of guessing a route for historical data.
Everything else (`turn/*`, `step/*`, plugin-owned `llm/retry`) is structural and does not project into a message. Token usage is observed on `assistant/message.usage` (the step that produced it); an operational error's step number is on `turn/end.reason` for `kind: 'error'`, with normalized `LlmFailure` facts for a final model-request failure and message/code for other live errors. Because this unreleased format intentionally has no compatibility promise, seed/load validation rejects request headers without provider+model and assistant messages without provider/model provenance instead of guessing a route for historical data.
## Live-session fork API
@@ -479,9 +479,13 @@ interface TurnEndReasonMap {
* The turn failed: a step threw or the model reported a failure. `step` is the
* step number the failure occurred on (the operational error's location — the
* single durable record of an in-turn failure; live diagnostics also fire via
* `agent/error`). `code` is the error's code when one was attached.
* `agent/error`). Final model-request failures retain their normalized facts
* as one `failure`; other turn failures retain their live Error message/code.
*/
error: { kind: 'error'; step: number; message: string; code?: string }
error: { kind: 'error'; step: number } & (
| { failure: LlmFailure; message?: never; code?: never }
| { message: string; code?: string; failure?: never }
)
disposed: { kind: 'disposed' }
/** At least one step reached its output-token ceiling, even if a plugin continued the turn. */
'max-tokens': { kind: 'max-tokens' }