fix: warn instead of failing on oversized compact results

crates/manifest/src/defaults.rs

@@ -88,7 +88,7 @@ pub const COMPACT_SUMMARY_TARGET_TOKENS: u64 = 2_000;
 /// See [`crate::CompactionConfig::summary_max_tokens`].
 pub const COMPACT_SUMMARY_MAX_TOKENS: u64 = 4_000;
 
-/// Dry-run cap for the compacted session's initial request context.
+/// Warning threshold for the assembled compacted history. Compaction continues.
 /// See [`crate::CompactionConfig::result_context_max_tokens`].
 pub const COMPACT_RESULT_CONTEXT_MAX_TOKENS: u64 = 60_000;
 

crates/manifest/src/lib.rs

@@ -965,7 +965,9 @@ pub struct CompactionConfig {
     )]
     pub auto_read_budget_tokens: u64,
 
-    /// Dry-run cap for the compacted session's initial request context.
+    /// Warning threshold for the assembled compacted history estimate, including
+    /// retained items and auto-read files. Exceeding it does not abort compaction;
+    /// request-time context safety checks still apply. `0` disables this warning.
     #[serde(default = "default_result_context_max_tokens")]
     pub result_context_max_tokens: u64,