fix(core): retry on failed as well as timeout; only auth stops the run (#104)

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/core/src/interfaces.ts

@@ -147,13 +147,16 @@ export interface GenerativeModelParameters {
  *   - `malformed`: AgentHub response failed JSON parsing, needs reconnect — also retried by
  *     `context_engine`;
  *   - `aborted`: user-initiated interruption — stop and hand back to the user;
- *   - `failed`: other non-retryable errors (params, etc.) — stop and hand back to the user
- *     (`message` provides the display text);
- *   - `auth`: the provider rejected the credentials (see `isAuthenticationError`) — behaves
- *     like `failed` in the engine (direct stop, never retried), but hosts key on the status
- *     to disable input until the model's API key is updated (only the model reference is
- *     fixed at Session creation; credentials come from the current Project config, so a key
- *     update lets the Session continue).
+ *   - `failed`: an error the retry classifier did not judge transient (params, etc.) — still
+ *     retried by `context_engine` within the same run (`message` provides the display text).
+ *     The classification stays honest — this is reported as `failed`, not relabelled a
+ *     timeout — while the *policy* retries it, because that classifier is an allowlist and a
+ *     gateway phrasing a transient fault its own way lands here;
+ *   - `auth`: the provider rejected the credentials (see `isAuthenticationError`) — the one
+ *     status that stops the run outright, since no retry can turn a rejected credential into
+ *     a working one; hosts also key on it to disable input until the model's API key is
+ *     updated (only the model reference is fixed at Session creation; credentials come from
+ *     the current Project config, so a key update lets the Session continue).
  * Docs: /docs/interfaces § "LLMOutcome semantics".
  */
 export interface LLMOutcome {