Claude Code tightens agent controls as async delegation wobbles
Wednesday, September 2, 2026 · 10 min
Claude Code v2.1.257 adds Fable 5.1, containment-escape gating, and outside-folder read prompts, while Hermes Agent and Codex reports show orchestration and deploy credentials still failing in production workflows.
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Claude Code v2.1.257 adds Fable 5.1, containment-escape gating, and outside-folder read prompts, while Hermes Agent and Codex reports show orchestration and deploy credentials still failing in production workflows.
In this episode
- v2.1.257 — Anthropic
What's changed Added Claude Fable 5.1 ( claude-fable-5-1 ), now the default Fable model — 1M context, $10/$50 per Mtok with $0.25/Mtok cache reads Added "Time format" ( timeFormat ) and timeZone settings: 12-hour, 24-hour, 24-hour UTC, or a strftime pattern for the turn-end clock and transcript-view timestamps Added a Containment Escape rule to auto mode so cloud metadata-credential fetches,…
- async_delegation wake self-post: 600s client timeout + no per-session lock ⇒ duplicate concurrent turns, delayed and dropped results · Issue #100689 · NousResearch/hermes-agent · GitHub — GitHub
# async_delegation wake self-post: 600s client timeout + no per-session lock ⇒ duplicate concurrent turns, delayed and dropped results - State: open - Author: zbabiarz - Created: 2026-09-01T20:48:11Z - Updated: 2026-09-02T03:09:29Z - Repository: NousResearch/hermes-agent - Number: #100689 ## Labels - type/bug - comp/gateway - tool/delegate - P2 - sweeper:risk-session-state -…
- Subagents (Agent tool, custom types) die silently at startup: no transcript, no error, no log; parent never notified · Issue #91298 · anthropics/claude-code · GitHub — Anthropic
# Subagents (Agent tool, custom types) die silently at startup: no transcript, no error, no log; parent never notified - State: open - Author: cciordas - Created: 2026-09-01T19:18:18Z - Updated: 2026-09-01T19:19:36Z - Repository: anthropics/claude-code - Number: #91298 ## Labels - bug - has repro - platform:linux - area:agents --- ## Summary Subagents spawned via the Agent tool (custom…
- Sites source repository write credential is already expired when issued · Issue #42119 · openai/codex · GitHub — GitHub
# Sites source repository write credential is already expired when issued - State: open - Author: v19880112-lab - Created: 2026-09-01T19:14:14Z - Updated: 2026-09-01T19:14:54Z - Repository: openai/codex - Number: #42119 ## Labels - bug - auth - app --- ### What issue are you seeing? A Sites project cannot be published because create_source_repository_write_credential returns a source write…
- [BUG] Cowork: sessions-api/sessions-bridge emit zero log output — device bridge never initializes (Windows, 1.40609.0.0) · Issue #91252 · anthropics/claude-code · GitHub — Anthropic
# [BUG] Cowork: sessions-api/sessions-bridge emit zero log output — device bridge never initializes (Windows, 1.40609.0.0) - State: open - Author: jonathanlavignenrcan - Created: 2026-09-01T15:29:13Z - Updated: 2026-09-01T15:30:47Z - Repository: anthropics/claude-code - Number: #91252 ## Labels - bug - has repro - platform:windows - area:cowork --- ### Preflight Checklist - [x] I have…