#Japan #AI Agents #Chiyoda #OrcaRouter #Claude Fable

FlashLabs Launches OrcaReplay Tool

On the launch day of Anthropic's latest AI model, Claude Fable 5.1, FlashLabs Inc., based in Chiyoda, Tokyo, announced a groundbreaking development. The company reported that the development team behind OrcaRouter, an AI inference gateway developed by the American research organization Continuum AI, successfully acquired and published the operational command instructions for the newly introduced AI agent. These instructions, which are crucial to understanding the model's behavior and decision-making process, were made available on GitHub on September 2, 2026 (Japan Time).

Overview of OrcaReplay

OrcaReplay operates as an AI agent execution record tool that captures the communication between the user and the AI model. Typically hidden from users, the operational rules, or system prompts, that guide the AI agent's behavior are now openly accessible. With OrcaReplay, anyone can verify the workings of the latest AI models and the intent behind their actions.

Key Highlights

1. Successful Command Capture: On the day Claude Fable 5.1 was publicly announced by Anthropic, the OrcaReplay tool captured the operational instructions in one command without the need for agent modifications or special configurations.
2. Automatic Anonymization: The captured commands are automatically anonymized to protect personal information before being shared on GitHub. Raw execution records, which could contain identifiable information, are not disclosed.
3. Open Source Code: The captured data and functionalities will be available as open-source under the Apache-2.0 license. Installation requires merely executing `npm i -g orcareplay` with Node.js version 20 or above.

Importance of Command Instructions

AI coding agents, including Claude Code and Codex CLI, consistently send operational instructions to the model with each user interaction. These instructions clarify the agent's role, ensuring security and functional capabilities. By providing transparency into these commands, developers can better understand, develop, and compare AI agents.

The Process Behind OrcaReplay

The OrcaRouter development team applied its recording capabilities to obtain operational instructions. By initiating a local proxy of OrcaReplay, they were able to capture the instructions sent to the model seamlessly. Here's a brief outline of the procedure:

• - Launch the local proxy for OrcaReplay.
• - Start the target AI agent and await initial communication containing the operational instructions.
• - Extract the instructions while replacing identifiable elements (like usernames and directory locations) with placeholders such as `{{USER}}` and `{{CWD}}`.
• - Save the anonymized instructions in designated collections for sharing.

Privacy considerations are paramount; if any identifiable information remains, the process is halted to prevent unauthorized disclosures. The raw execution data stays only within the user's environment and is not committed to public repositories.

Reactions from the Community

Shortly after the announcement of the operational instructions' availability via social media, the OrcaRouter official X account garnered over 230,000 views, igniting significant interest among developers worldwide. As of September 3, 2026, a total of 13 sets of commands—comprising four for Claude Code (including two formats for Fable 5.1), two for Codex CLI, and seven for OpenCode—have been made public.

Future Developments

As a version 0 tool, OrcaReplay is poised for continuous updates every time new AI models are announced, ensuring that the collection of commands remains relevant. Furthermore, the team is committed to enhancing the functionality of execution records in collaboration with the community while promoting productivity and transparency in AI agent development via OrcaRouter.

About OrcaRouter

OrcaRouter, an AI inference gateway exclusive to the Japanese market offered by FlashLabs, aggregates access to various AI models, including those from OpenAI, Anthropic, Google, and more, through a single gateway. As the landscape of AI models evolves, OrcaRouter ensures developers have the tools needed to leverage the latest advancements efficiently.

Company Background

FlashLabs Inc. is headquartered in Tokyo's Chiyoda district and is committed to developing AI applications for automating and optimizing business processes. Established in July 2023, the company aims to provide innovative solutions that empower users with accessible, cutting-edge AI capabilities.

For more information, visit FlashLabs.