fix: honor lightContext in spawned subagents (#62264) (thanks @theSamPadilla)

* Add lightContext support for spawned subagents

* Clarify and guard lightContext usage in sessions_spawn

* test: guard sessions_spawn lightContext acp misuse

* fix: honor lightContext in spawned subagents (#62264) (thanks @theSamPadilla)

---------

Co-authored-by: Jaz <jaz@bycrux.com>
Co-authored-by: Ayaan Zaidi <hi@obviy.us>

src/agents/command/attempt-execution.ts

@@ -473,6 +473,8 @@ export function runAgentAttempt(params: {
     lane: params.opts.lane,
     abortSignal: params.opts.abortSignal,
     extraSystemPrompt: params.opts.extraSystemPrompt,
+    bootstrapContextMode: params.opts.bootstrapContextMode,
+    bootstrapContextRunKind: params.opts.bootstrapContextRunKind,
     internalEvents: params.opts.internalEvents,
     inputProvenance: params.opts.inputProvenance,
     streamParams: params.opts.streamParams,

src/agents/command/types.ts

@@ -85,6 +85,10 @@ export type AgentCommandOpts = {
   lane?: string;
   runId?: string;
   extraSystemPrompt?: string;
+  /** Bootstrap workspace context injection mode for this run. */
+  bootstrapContextMode?: "full" | "lightweight";
+  /** Run kind hint for bootstrap context behavior. */
+  bootstrapContextRunKind?: "default" | "heartbeat" | "cron";
   internalEvents?: AgentInternalEvent[];
   inputProvenance?: InputProvenance;
   /** Per-call stream param overrides (best-effort). */