chore(agent): trim hydration budget comments

Generated-By: PostHog Code
Task-Id: c6065620-5694-4478-a20a-fec4ccde8f1a

Author: tatoalo

packages/agent/src/adapters/claude/session/jsonl-hydration.ts

@@ -241,16 +241,10 @@ export function rebuildConversation(
   return turns;
 }
 
-// JSON-heavy tool payloads tokenize at ~2.5-3 chars/token, so estimate low:
-// overestimating a turn's cost just drops more history, underestimating
-// overfills the context window.
+// JSON-heavy tool payloads tokenize at ~2.5-3 chars/token, so estimate low.
 const CHARS_PER_TOKEN = 3;
-// Budgets must leave the window room for the system prompt, tools, skills,
-// and the resumed run's own work. The rebuilt transcript carries zero usage
-// metadata, so the SDK can't see the real context size and auto-compact
-// before the first API call — if the hydrated history overfills the window,
-// every request (including compaction itself) fails with "prompt is too
-// long" and the run dies. Target roughly half the window in real tokens.
+// Target ~half the context window: hydrated transcripts carry no usage
+// metadata, so the SDK can't auto-compact before the first API call.
 const DEFAULT_MAX_TOKENS = 80_000;
 const LARGE_CONTEXT_MAX_TOKENS = 400_000;