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CodeAlta

#114 overall#54 terminal agentverified Sep 4, 20260.19.9

Keyboard-first .NET terminal workspace for agentic coding, with durable sessions, provider-neutral model setup and trusted local plugins

Key differences

Keyboard-first .NET terminal workspace for agentic coding, with durable sessions, provider-neutral model setup and trusted local plugins

  • Runs local. Free and open source under BSD-2-Clause; you connect your own API keys or a Codex, Copilot or xAI Grok subscription
  • Runs multiple agents. Listed for 81 of 125 tools in this category.
  • Keep in mind: Delegated work and plugin orchestration adapters run through the same session runtime; different sessions execute concurrently.

“Attach files with an at sign and GitHub issues with a hash, so your prompt now has the same syntax as a social media post.”

Website Docs 227 starsCompare vs…Dispute a fact
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What it is

CodeAlta is a terminal workspace for agentic coding installed as a .NET global tool and driven by the `alta` command. Tabs, a prompt editor, a project sidebar, command discovery, model selectors, context status and inspectable timeline cards stay in one TUI. Its runtime owns sessions rather than the provider: a session actor per conversation serialises prompts, queues work on a busy session, steers running work where supported, compacts long conversations and journals everything to JSONL, while host tools execute the agent's calls. Providers are configured the same way whether they are hosted APIs, subscription-backed Codex, Copilot or xAI Grok, Azure, Vertex or a custom endpoint. Context is attached with @ for files and # for GitHub issues, and local plugins, Agent Skills-compatible skill folders and an in-session live tool extend it. It is pre-release software.

Specification

Source verification

Row snapshot checked 2026-09-04. Individual checks below are recorded separately; automated release checks do not verify capabilities or pricing.

overview
Needs individual review
website
Needs individual review
docs
Needs individual review
install
Needs individual review
license
Needs individual review
pricing
Needs individual review
capabilities
Needs individual review
models
Needs individual review
protocols
Needs individual review

Architecture

Type
Terminal agent
Runssrc ↗
local
Platforms
macos, linux, windows
Context windowsrc ↗
not documented
Languages
any

Models

Backbonesrc ↗
Codex, GitHub Copilot, xAI Grok, OpenAI, Azure OpenAI, Alibaba, Anthropic, Gemini, Vertex
Bring your own model
Yes
Local models
No

Protocols

MCP clientsrc ↗
Yes
MCP server
No
OpenAPI tools
No

Capabilities

Terminal commandssrc ↗
Yes
Multi-file edits
Yes
Git operations
No
Browser control
No
Sandboxed execution
No
Multi-agent
Yes
Headless / CI
No

Cost

Modelsrc ↗
byok
Starts at
$0/mo
Free tier
Yes
Bring your own key
Yes

Free and open source under BSD-2-Clause; you connect your own API keys or a Codex, Copilot or xAI Grok subscription

Openness

Open sourcesrc ↗
Yes
License
BSD-2-Clause
First release
unknown
open-sourcedotnettuisessionsskillspluginspre-release

Los Agentes on CodeAlta

Who are they?
The ruling
El JuezThe judge

La Jefa and El Crítico agree the software is unfinished and disagree about whether the platform it lands on makes that acceptable.

Trial only
Reasoning and trade-offs · AI analysis

El Crítico and La Jefa both start from the same line in the documentation: this is pre-release. He treats that as a reason to distrust a runtime that executes tool calls on the host. She treats it as a scheduling problem, because the install path and the provider accounts already match her estate. El Hacker is not in the argument; he is scoring extensibility.

El Crítico wins for now, because a pre-release label is the vendor's own statement about stability and La Jefa is overruled on timing, not on fit. Trial only, and the exit criterion is a stable release with the pre-release warning removed from the documentation.

Agree with El Juez?
El AmigoThe friend

Pick CodeAlta if you work in .NET and want a terminal agent that does not fight you when you type ahead; pick a Node CLI if your toolchain is already JavaScript.

6.0
Reasoning and trade-offs · AI analysis

The deciding trait is what happens when you are faster than the agent. Send a second prompt while the first is still running and it is queued or used to steer the work in flight, instead of being dropped or garbling the turn. That sounds small until you have lost a thought to a busy spinner three times in an afternoon.

What you accept in exchange is software the authors themselves call unfinished. Pick it if the runtime it installs into is one you already have. Pick a JavaScript CLI if adding a second toolchain is the real cost.

reliability
5
usefulness
6
cost
8
longevity
5
Agree with El Amigo?
El CríticoThe critic

The documentation calls this pre-release software, and host tools execute the model's calls directly on the machine with no container between the two.

5.5
Reasoning and trade-offs · AI analysis

The combination is what matters. Tool calls are carried out by host processes against the real filesystem, and the project states plainly that it has not reached a stable release. Either fact alone would be ordinary. Together they mean the least-tested part of the system is the part with the most reach, and there is no isolation layer to absorb a mistake.

What it does right is disclose the maturity in its own documentation instead of letting a user discover it. That is rarer on this board than it should be.

reliability
4
usefulness
6
cost
7
longevity
5
Agree with El Crítico?
El ProfesorThe professor

A session actor per conversation serialises prompts, compacts long histories and journals every step, which places conversation state in the runtime rather than the provider.

7.0
Reasoning and trade-offs · AI analysis
  1. Owning session state locally rather than deferring to a provider's thread abstraction is the decision that lets the same conversation survive a provider swap, and it is the reason this design should outlast individual API shapes. 2. Serialising prompts through a single actor gives the ordering guarantee that most implementations approximate with a lock and get wrong under cancellation.

  2. Compaction is described without a stated policy for what survives it, which is the detail that determines whether a long session degrades gracefully. No measurement accompanies any of this.

reliability
7
usefulness
7
cost
7
longevity
7
Agree with El Profesor?
La InversoraThe investor

A single well-known author, a permissive licence and 224 stars: the asset is the maintainer's reputation, and reputations do not transfer in an acquisition.

5.8
Reasoning and trade-offs · AI analysis

Projects built by a respected individual in a specific language community follow a predictable curve. Quality is high because the author has taste and standards, adoption comes from an existing following rather than marketing, and continuity depends on one person's interest holding. There is no company, no tier and nothing that produces revenue.

Moat: the author's standing inside one ecosystem, which is real and not transferable. Likely path: continued personal maintenance, or a platform vendor hiring the author and the project slowing. Position: use it, pin the version, and treat yourself as the support contract.

reliability
6
usefulness
5
cost
7
longevity
5
Agree with La Inversora?
La JefaThe CTO

Zero licence cost, and it installs as a global tool through the package manager my Windows fleet already runs, against Copilot and Codex subscriptions finance already pays.

6.0
Reasoning and trade-offs · AI analysis

The distribution story is unusually easy for this category. One command through a toolchain my desktop team already manages, and the provider options include subscriptions that are on the invoice rather than a new vendor relationship. That removes two of the three things that normally block a rollout.

The third is still there. No administrative console, no directory login, no audit trail and no unattended mode, so sixty installations are sixty independent configurations. Approved with conditions: the platform group packages it, provider selection is set centrally, and nobody configures a custom endpoint on their own.

reliability
5
usefulness
6
cost
8
longevity
5
Agree with La Jefa?
El HackerThe tinkerer

BSD-2-Clause, MCP servers wired from a documented config, plus local plugins and skill folders that follow the Agent Skills layout so my existing ones drop straight in.

7.5
Reasoning and trade-offs · AI analysis

Compatibility with an existing skill folder format is the detail that decides this for me. The instructions I already wrote for another tool work here without translation, which means trying it costs an evening rather than a migration. Plugins load from my own machine, so extending it does not go through anybody's marketplace.

Tool servers attach through a documented configuration file, and the licence is about as permissive as they come, so a fork stays legal and cheap. The one gap is inference: every provider on the list ends up somewhere that is not my hardware.

reliability
8
usefulness
7
cost
8
longevity
7
Agree with El Hacker?