v0.19.0 Release Notes

Released 2026-04-17

v0.18.3 -> v0.19.0

Summary

Introduces concurrent tool-call dispatch, an invoke_subagent in-process delegate, and a same-payload circuit breaker; switches search_web to the DuckDuckGo lite endpoint and hardens provider/fetch fallbacks across Codex, Google RSS, and Yahoo Finance.

翻譯

新增並發 tool-call 分派、in-process invoke_subagent 子 agent 與相同 payload 斷路器；search_web 切換至 DuckDuckGo lite endpoint，並強化 Codex、Google RSS、Yahoo Finance 的 provider 與抓取 fallback。

Changes

FEAT

• Add three-pass concurrent tool-call dispatcher with Concurrent registry flag, fan-out for fetch_page/invoke_subagent/calculate, and per-batch stub activation guard
• Add invoke_subagent in-process sub-agent with isolated temp sessions, model/system-prompt/exclude overrides, and mandatory self-exclusion to prevent recursion
• Add same-payload retry circuit breaker across provider and tool calls to abort identical repeats after MaxRetry
• Expose ToolArgs on tool-call events so UIs can render arguments before execution

翻譯

• 新增三段式並發 tool-call 分派器、registry Concurrent 旗標，fetch_page／invoke_subagent／calculate fan-out，並以 batch 內 stub activation 防止重複啟用
• 新增 in-process invoke_subagent 子 agent：獨立暫時 session、可覆寫 model／system prompt／排除工具，並強制排除自身避免無限巢狀
• 新增 provider 與 tool call 的相同 payload 重試斷路器，超過 MaxRetry 即中止
• 事件流暴露 ToolArgs，讓 UI 能在執行前顯示參數

REFACTOR

• Switch search_web from html.duckduckgo.com to lite.duckduckgo.com/lite/ with new anchor/snippet parsing and drop sub-day time ranges unsupported by DDG
• Extract Yahoo Finance fetch constants and simplify tool registration layout

翻譯

• search_web 由 html.duckduckgo.com 改用 lite.duckduckgo.com/lite/，改寫 anchor／snippet parser，移除 DDG 不支援的日內時間區間
• 抽出 Yahoo Finance 抓取常數並精簡 tool 註冊結構

UPDATE

• Add prompt_cache_key (sha256 of system instructions) to Codex Responses API body to route identical prefixes to the same cache shard
• Allow Codex in general routing; separate system instructions for Responses API and abort repeated validator retries
• Consolidate tool cache storage and harden fetch fallbacks, including isRedirected404 detection for soft 404 via err=404/403/410 query params
• Harden Google RSS parameter handling with a default time range
• Strengthen agent tier routing and memory-driven tool recovery

翻譯

• Codex Responses API body 加入 prompt_cache_key（system instructions sha256），相同前綴落到同一 cache shard
• 一般路由允許 Codex；Responses API 獨立系統 instructions，並中止重複的 validator 重試
• 統一 tool cache 儲存並強化 fetch fallback；新增 isRedirected404，透過 err=404/403/410 query param 偵測 soft 404
• 強化 Google RSS 參數處理並設定預設時間區間
• 強化 agent 分級路由與基於 error memory 的 tool 復原

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