plyngent

Single-user LLM chat and agent toolkit for the terminal.

Python 3.14+. OpenAI-compatible APIs (including DeepSeek OpenAI-compat), OpenAI Responses with optional hosted tools, SQLite session memory, workspace-scoped file/process/VCS tools, and a readline REPL with slash commands.

Requires Python 3.14+ on your PATH (or via uv / pipx).

Install

Quick try (uvx)

No permanent install — runs the published package in a temporary environment:

uvx plyngent --help
uvx plyngent chat

User tool install

Keep plyngent on your PATH as a managed tool:

# uv (recommended)
uv tool install plyngent
plyngent --help

# pipx
pipx install plyngent
plyngent --help

Upgrade later:

uv tool upgrade plyngent
# or: pipx upgrade plyngent

pip (venv or user)

python3.14 -m venv .venv
source .venv/bin/activate   # Windows: .venv\Scripts\activate
pip install -U pip
pip install plyngent
plyngent --help

Or user install (if you accept that layout):

pip install --user plyngent

From a git clone (development)

pdm install          # first time
pdm sync             # after pull
pdm run plyngent --help

Dev checks (same order as CI):

pdm run ruff check .
pdm run ruff format --check .   # or: pdm run ruff format .  to apply
pdm run basedpyright .
pdm run pytest

Commit gateway (prek): runs ruff check + format and basedpyright on git commit so format is not forgotten.

uv tool install prek    # once
prek install            # once per clone (installs .git/hooks/pre-commit)
prek run --all-files    # run all hooks on demand

Config: prek.toml. CI still runs the same checks in GitHub Actions.

Basic usage

# 1) Create / open config
plyngent config path
plyngent config edit    # needs $EDITOR

# Minimal provider (OpenAI platform — Responses API; preset defaults to openai):
# [providers.oai]
# access_key_or_token = "sk-..."
# # models default: gpt-5.4, gpt-5.4-mini, gpt-5.4-nano
# # provider_tools default: web_search  (use provider_tools = [] to disable)

# 2) Chat
plyngent chat
plyngent chat --provider oai --model gpt-5.4-mini
plyngent chat -p "Summarize this repo" --provider oai --model gpt-5.4-mini --no-stream

# 3) List providers from config
plyngent providers

In the REPL: type normally, use /help for slash commands, """ … """ for multiline, /markdown for Rich rendering, /quit to leave.

Configure

Default config path (platformdirs):

plyngent config path
plyngent config edit    # opens $EDITOR (e.g. codium --wait)

Copy the example and fill in a real token:

cp doc/plyngent.example.toml "$(plyngent config path)"
# then edit providers

Minimal shape:

[providers.local]
preset = "openai-compatible"
url = "https://api.openai.com/v1"
access_key_or_token = "sk-..."

[providers.local.models]
"gpt-4o-mini" = { text = true }

[agent]
system_prompt = "You are a careful coding assistant."
confirm_destructive = true
max_context_tokens = 200000

Supported provider presets today: openai (default if preset is omitted; default models gpt-5.4 / gpt-5.4-mini / gpt-5.4-nano when models is omitted), openai-compatible, deepseek (OpenAI convention; default models deepseek-v4-flash and deepseek-v4-pro if models is omitted). Anthropic presets are modeled in config but not wired in the runtime client yet.

If [database] is omitted (or SQLite url is empty/":memory:"), chat uses a durable file under the user data dir (e.g. ~/.local/share/plyngent/chat.db on Linux).

Chat

Interactive REPL

plyngent chat
plyngent chat --provider local --model gpt-4o-mini
plyngent chat --workspace /path/to/project --new
plyngent chat --session 3

Flag	Meaning
--provider / --model	Select from config (required when multiple and non-interactive)
--workspace	Tool root (default: cwd); sessions bind to this path
--new / --session ID	Fresh session vs resume by id
--tools / --no-tools	Default tools on
--max-rounds	Tool-loop rounds per turn (default 32)
--stream / --no-stream	Streaming deltas (default on)
--quiet	Less status on stderr
--yes	YOLO on: skip destructive-tool confirms for this process
--log-level	On the root CLI: DEBUG, INFO, WARNING, …

Sessions resume the most recently updated session for the current workspace unless you pass --new or --session. Each session remembers the last provider and model (restored on resume so you are not re-prompted).

One-shot (scripts / CI)

plyngent chat -p "Summarize README.md" --provider local --model gpt-4o-mini --no-stream
echo "hello" | plyngent chat --provider local --model gpt-4o-mini

Exit codes (one-shot):

Code	Meaning
0	Success
1	Config / usage error
2	Cancelled
3	Turn failed (API / incomplete)

Input ergonomics

• Multiline: start a message with """, end a later line with """.
• /edit: compose a turn in $EDITOR (empty buffer cancels).
• Tab: completes slash commands and some arguments (provider, model, on/off, export, /help targets).

Slash commands

Type /help in the REPL for the live list. Common ones:

Command	Purpose
/status	Provider, session, context/usage estimates
/history [n|last]	Recent messages (default preview; last/1 = full + markdown)
/history --full	Full bodies for the selected window
/sessions	Sessions for this workspace
/new /resume /rename /delete	Session lifecycle (/delete confirms)
/export [md|json] [path]	Transcript from DB (no secrets)
/compact	Soft-compact + model summary into a new session
/stream /verbose /markdown /tools /rounds	Toggles and limits
/yolo [on|off|once]	Soft destructive confirms: sticky skip, off, or next turn only

| /retry | Re-run incomplete last user turn (after error/cancel) | | /provider /model | Switch without restarting | | /model --persist | Save current model id into plyngent.toml catalog | | /models | List config + remote GET /models (always re-fetches) | | /models --persist | Merge remote catalog into TOML for this provider | | /todos | Todo/task stack: list, push, pop, done, clear | | /config | Edit plyngent.toml in $EDITOR and reload | | /quit | Leave the REPL |

User messages are saved immediately. On API error or Ctrl+C, partial assistant/tool output is discarded but the user message stays so /retry works after resume. Interactive auto-retry uses 10s / 20s / 30s delays.

Workspace model

• Workspace = root for file/process/VCS tools (default cwd).
• Session = SQLite chat bound to a workspace path.
• Resuming a session from another directory prompts: keep session workspace, rebind to current, or abort.

Tools (when enabled)

Default registry: file ops (including tree with default noise-dir skips), run_command / PTY (POSIX openpty; Windows ConPTY via pywinpty), read-only VCS (git), human prompts (ask_user_line / ask_user_choice / ask_user_form), and todo stack tools (todo_list / todo_push / todo_pop / todo_update / todo_clear).

Safety defaults:

• Paths stay under the workspace; optional path_denylist substrings (tree also skips denylisted children by default).
• Command basename denylist (e.g. dangerous shells/utilities).
• Destructive tools (delete/move/overwrite) can require confirm (confirm_destructive; default deny in non-TTY). Override for the session with /yolo on|off|once or startup --yes (path/command denylists still apply).
• PTY sessions: caps, idle TTL, output budget; master FD is non-inheritable; sessions closed on chat exit. Prefer file tools over full-screen editors (vim/nano) for edits. read_pty sanitizes CSI/controls so tool results cannot reprogram the host TTY (no host terminal reset on exit). write_pty is literal text only; use write_pty_keys for \xHH, ctrl+x, key=esc|enter|….

Usage / context (CLI)

• Context size prefers API prompt_tokens from the last model call; otherwise a char-based estimate (~4 chars/token).
• Turn/session usage sum billed completion usage across tool rounds (history is re-sent each round).
• Soft compact can calibrate from reported prompt_tokens. See /status.

Other commands

plyngent providers          # list configured providers
plyngent config path|edit
plyngent --log-level INFO chat ...

Architecture (short)

See doc/architecture.md and CLAUDE.md for developers.

• lmproto/ — OpenAI-compatible (+ DeepSeek) msgspec models and async SSE clients
• agent/ — tool loop, streaming, usage, compact
• memory/ — async SQLAlchemy sessions/messages
• tools/ — workspace tools
• cli/ — Click entry + slash registry (awaitlet bridges sync Click to async work)
• Multi-tenant / web (router/, real web/) are not in scope for the single-user CLI (Phase H).

License

MIT