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[Feature Request] Native support for Custom / Client-Executed Tool Search with Prompt Caching and defer_loading awareness in tool selection middlewares
anthropic`langchain-anthropic` package issues & PRs`langchain-anthropic` package issues & PRsfeature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionalitylangchain`langchain` package issues & PRs`langchain` package issues & PRsopenai`langchain-openai` package issues & PRs`langchain-openai` package issues & PRsStatus: Open.#39908 In langchain-ai/langchain;core:
MarkdownListOutputParsersilently drops+bullet itemsbugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurecore`langchain-core` package issues & PRs`langchain-core` package issues & PRsStatus: Open.perplexity: Responses API path drops the cache token counts Perplexity reports, so
input_token_detailsis always emptybugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featureperplexity`langchain-perplexity` package issues & PRs`langchain-perplexity` package issues & PRsStatus: Open.#39897 In langchain-ai/langchain;perplexity:
_astreamemitssearch_context_sizeon every usage chunk, so merged chunks yield"lowlow"bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featureperplexity`langchain-perplexity` package issues & PRs`langchain-perplexity` package issues & PRsStatus: Open.#39896 In langchain-ai/langchain;anthropic: auto-append required 'advisor-tool-2026-03-01' beta header for advisor_20260301 tool
anthropic`langchain-anthropic` package issues & PRs`langchain-anthropic` package issues & PRsbugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featureStatus: Open.#39895 In langchain-ai/langchain;create_agent: heterogeneous middleware list collapses inferred state to AgentState, rejecting middleware with richer state schemas
bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurelangchain`langchain` package issues & PRs`langchain` package issues & PRsStatus: Open.#39882 In langchain-ai/langchain;feat(langchain): wrap GraphBubbleUp with agent context in middleware
feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionalitylangchain`langchain` package issues & PRs`langchain` package issues & PRsStatus: Open.#39877 In langchain-ai/langchain;Add a first-party Python DirectoryLoader with a per-extension loader map (JS parity)
feature requestRequest for an enhancement / additional functionalityRequest for an enhancement / additional functionalitylangchain`langchain` package issues & PRs`langchain` package issues & PRsStatus: Open.#39870 In langchain-ai/langchain;count_tokens_approximately counts every image as 85 tokens regardless of resolution
bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurecore`langchain-core` package issues & PRs`langchain-core` package issues & PRsStatus: Open.#39858 In langchain-ai/langchain;Raises: block on Runnable.__ror__ states a rationale that only holds for __or__
bugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurecore`langchain-core` package issues & PRs`langchain-core` package issues & PRsStatus: Open.#39856 In langchain-ai/langchain;PIIMiddleware
iptype does not detect IPv6 addressesbugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurelangchain`langchain` package issues & PRs`langchain` package issues & PRsStatus: Open.core:
DictPromptTemplate.aformatis never called — the async prompt path uses syncformatbugRelated to a bug, vulnerability, unexpected error with an existing featureRelated to a bug, vulnerability, unexpected error with an existing featurecore`langchain-core` package issues & PRs`langchain-core` package issues & PRsStatus: Open.#39835 In langchain-ai/langchain;