Owen Lin 820f85cf59 Truncate oversized MCP results in paginated thread history (#50458) ...

## Why

Paginated thread history can persist large MCP results in completed tool-call items. Bound these stored results to avoid retaining multi-megabyte payloads.

## What changed

Apply a 64 KiB preview budget when persisting oversized MCP results in paginated history. Replace the result with a truncated text preview of its serialized JSON, preserving `is_error` and clearing `structuredContent` and `_meta`. Leave small results unchanged.

Share the truncation helper with the existing MCP tool-call event path.

## Testing

Add helper tests for unchanged small results and oversized results with structured content and metadata. Add a thread-history test verifying that persisted MCP results contain a bounded preview with the beginning, end, and truncation marker while preserving tool arguments.

GitOrigin-RevId: 09dce73c70bfd357c9b9630f456e9e5c1d8492cf

2026-10-02 23:15:02 +00:00

..

rollout_migration

Cap persisted command output in paginated history at 64 KiB (#50427)

2026-10-02 21:00:06 +00:00

tests

Add coordinated shutdown for local agent trees (#49814)

2026-10-01 01:57:56 +00:00

thread_history

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

archive_thread.rs

Coordinate rollout compression with active thread writers (#44138)

2026-09-09 12:30:07 +00:00

compression_writer_tests.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

create_thread.rs

Persist thread creator identity in rollouts and SQLite (#47113)

2026-09-21 21:22:01 +00:00

daybreak_metadata_tests.rs

Persist Daybreak preferences in thread metadata (#42854)

2026-09-04 21:17:25 +00:00

delete_thread.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

helpers.rs

Batch metadata reads when resolving thread names (#49305)

2026-09-29 16:36:07 +00:00

history_revision.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

list_threads.rs

Add experimental app-server project APIs (#38940)

2026-08-17 04:01:37 +00:00

live_writer.rs

Cap persisted command output in paginated history at 64 KiB (#50427)

2026-10-02 21:00:06 +00:00

mod.rs

Add attachment owner lookup to the app-server (#50094)

2026-10-01 20:47:05 +00:00

model_context_tests.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

model_context.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

move_thread_to_section.rs

Add persisted manual ordering for thread sections (#36007)

2026-07-29 18:37:22 +00:00

paginated_fork.rs

Resolve paginated thread history by rollout ID (#38244)

2026-08-12 20:31:52 +00:00

pending_thread_metadata_tests.rs

Persist empty paginated threads when naming them (#49785)

2026-10-01 00:57:29 +00:00

pending_thread_metadata.rs

Support metadata staging for reserved thread IDs (#38819)

2026-08-16 00:57:28 +00:00

projects.rs

Add recency sorting to project/list (#41223)

2026-08-27 23:43:46 +00:00

read_thread_tests.rs

Keep archived threads with empty previews visible in listings (#48199)

2026-09-25 20:11:47 +00:00

read_thread.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

revert_thread_tests.rs

Persist thread creator identity in rollouts and SQLite (#47113)

2026-09-21 21:22:01 +00:00

revert_thread.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

rollout_lineage_tests.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

rollout_lineage.rs

Reuse unchanged history snapshots when resuming threads (#49600)

2026-09-30 11:59:13 +00:00

rollout_migration_tests.rs

Cap persisted command output in paginated history at 64 KiB (#50427)

2026-10-02 21:00:06 +00:00

rollout_migration.rs

Resume model context from the latest compaction boundary (#47365)

2026-09-22 21:17:08 +00:00

search_threads_tests.rs

Preserve runtime workspace roots across thread resume (#43848)

2026-09-08 16:24:38 +00:00

search_threads.rs

Preserve runtime workspace roots across thread resume (#43848)

2026-09-08 16:24:38 +00:00

test_support.rs

Centralize SQLite connection configuration (#34808)

2026-07-22 18:45:47 +00:00

thread_attachments_tests.rs

Add thread attachment operations with coordinated deletion (#44350)

2026-09-10 00:30:27 +00:00

thread_attachments.rs

Add attachment owner lookup to the app-server (#50094)

2026-10-01 20:47:05 +00:00

thread_history_materialization_tests.rs

Truncate oversized MCP results in paginated thread history (#50458)

2026-10-02 23:15:02 +00:00

thread_history_materialization.rs

Move thread history projection into one blocking task (#49693)

2026-09-30 18:03:22 +00:00

thread_history.rs

Preserve and expose thread item lifecycle timestamps (#47114)

2026-09-21 22:23:26 +00:00

thread_rollout_resolver.rs

Resolve paginated thread history by rollout ID (#38244)

2026-08-12 20:31:52 +00:00

thread_sections_tests.rs

Add appearance metadata to thread sections (#37898)

2026-08-10 23:32:42 +00:00

thread_sections.rs

Add appearance metadata to thread sections (#37898)

2026-08-10 23:32:42 +00:00

timestamp_metadata_tests.rs

Avoid full metadata rewrites for thread timestamp updates (#48983)

2026-09-28 13:43:55 +00:00

unarchive_thread.rs

Coordinate rollout compression with active thread writers (#44138)

2026-09-09 12:30:07 +00:00

update_thread_metadata.rs

Persist empty paginated threads when naming them (#49785)

2026-10-01 00:57:29 +00:00