FrontierAgent is an open-source agent runtime and terminal-based TUI designed for long-horizon research and file-based tasks.
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It features two native workflow modes—ReAct for sequential agent work and Agent Team for parallel, coordinator-led investigations—within a task-scoped, fail-closed sandbox.
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Native TUI with ReAct and Agent Team workflow modes
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Task-scoped filesystem sandbox with read-only inputs and persistent outputs
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Live TUI task board with activity tracking
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Asynchronous human intervention and steering during agent runs
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Local session checkpointing, diff previews, and full execution tracing
Open Source
FrontierAgent is free and open-source under the Apache-2.0 license. Users are responsible for the costs of model tokens consumed via their own OpenAI-compatible API endpoint.
Best for
Developers and researchers performing multi-step research, file-heavy analysis, or those wanting to evaluate Apodex models in a local environment.
Not ideal for
Teams requiring stable tagged releases, deep LSP support, git-aware code editing, or environments that demand hardened security boundaries rather than file-level sandboxing.
FrontierAgent is a transparent and highly capable research-oriented agent harness, but because it is a very young project with no formal releases, it is currently better suited for local experimentation than for critical production workflows.
Recent repository activity includes fixes for shell descendant reaping, improved handling of quoted response filenames, and adjustments to how Agent Team gates track command approvals.
As of
Is FrontierAgent free?+
Yes - FrontierAgent is Open Source. FrontierAgent is free and open-source under the Apache-2.0 license. Users are responsible for the costs of model tokens consumed via their own OpenAI-compatible API endpoint.
Is FrontierAgent open source?+
Yes - FrontierAgent is open source. FrontierAgent is free and open-source under the Apache-2.0 license. Users are responsible for the costs of model tokens consumed via their own OpenAI-compatible API endpoint.
Who is FrontierAgent best for?+
Developers and researchers performing multi-step research, file-heavy analysis, or those wanting to evaluate Apodex models in a local environment.
Who is FrontierAgent not ideal for?+
Teams requiring stable tagged releases, deep LSP support, git-aware code editing, or environments that demand hardened security boundaries rather than file-level sandboxing.
What are the best FrontierAgent alternatives?+
The closest FrontierAgent alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes FrontierAgent?+
FrontierAgent is developed by Apodex AI. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
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