5 OneChat is one AI agent in a single chat that never ends. A daemon owns
6 the agent and its files, and a terminal client talks to it. It is in
7 early development. Linux is supported.
13 OneChat keeps its data and its token file in one directory. It uses the
16 #. ``ONECHAT_DIR``, when it is set.
17 #. ``$XDG_DATA_HOME/onechat``, when ``XDG_DATA_HOME`` is an absolute
18 path. A relative value is ignored.
19 #. ``~/.local/share/onechat``. With no home directory, OneChat exits
22 OneChat creates the directory with mode 0700.
28 ``config.json`` in the data directory holds the settings. OneChat does
29 not create it. A missing file or field takes the default, and an unknown
35 "endpoint": "chatgpt",
36 "compactor": {"model": "gpt-6.1-sol", "effort": "high"}
40 ``chatgpt`` (the default) sends model calls to the ChatGPT backend
41 with the subscription login. ``api`` sends them to the OpenAI API
42 with the key in ``OPENAI_API_KEY``, which must then be set. With
43 ``chatgpt``, OneChat ignores ``OPENAI_API_KEY``.
46 The model and the reasoning effort of the summaries. The defaults are
47 ``gpt-6.1-sol`` and ``high``.
53 The ``chatgpt`` endpoint needs a login with a ChatGPT account:
59 The command shows a link and a code. Open the link on any device, enter
60 the code, and approve the login. Device code login must be allowed in
61 the ChatGPT security settings. OneChat writes the tokens to
62 ``auth.json`` in the data directory, with mode 0600, and refreshes them
63 before they expire. The file belongs to OneChat only. Do not share it
64 with the Codex CLI, because each program rotates the refresh token and
71 Start the daemon, and then the client in another terminal:
78 The daemon owns the root agent in ``agent/`` in the data directory and
79 listens on the Unix socket ``onechat.sock`` there. In the client, each
80 line is a message to the agent, the line ``/stop`` interrupts the
81 running turn, and Ctrl-D ends the client. The client shows the replies,
82 the tool calls, and the first lines of each tool result as they happen.
83 The daemon is the only process that uses the token file while it runs,
84 so ``onechat login`` and ``onechat probe`` refuse to start until it
87 The agent runs commands with bash as the user in its working directory,
88 with no sandbox. It has the rights of the user, also on the token file.
90 ``agent/config.json`` holds the settings of the agent. The first start
91 writes it with the defaults and a random ID. Do not change the ID: the
92 prompt cache key comes from it.
98 "id": "0123456789abcdef0123456789abcdef",
99 "model": "gpt-6.1-sol",
101 "workdir": "/home/user"
104 ``workdir`` is an absolute path, and its default is the home directory.
105 ``agent/instructions.md`` holds the user's instructions: who they are,
106 how their files are organized, and how they want work done. The prompt
107 ends with them, and a change applies at the next call.
113 ``onechat probe LOG COUNT [BUILDS]`` measures the compactor on a log. It
114 appends the first COUNT messages of LOG, one JSON object ``{"kind",
115 "text"}`` on each line, to a new chat in ``probe/`` in the data
116 directory, and builds its tree with real model calls. The calls use the
117 quota of the account. The run stops at the first failed call, after 660
118 calls, or when the used percent of a quota window grows by more than 15
119 points. At the end it reports the calls per message, the cached share of
120 the input tokens, the retries, the line sizes, and the quota at the
121 first and the last call. BUILDS, from 1 to 8, limits the model calls at
124 A test writes a generated log of readable made-up messages:
128 ONECHAT_PROBE_LOG=probe.jsonl go test -run TestProbeLogHasTheSyntheticMix
134 Nix supplies the Go toolchain and all tools. Enter the development shell
141 Or enter it directly:
147 The shell sets ``ONECHAT_DIR`` to ``.devenv/onechat`` in the checkout,
148 unless it is already set. Development data goes there, and Git ignores
158 Format and check all files: