Penguin CLI

The penguin CLI manages model credentials, default models and per-agent vault secrets. Its primary job is model configuration: penguin config model add registers a model and penguin config model list shows the models currently available. Configuration goes through the CLI only — never read or hand-edit the underlying hidden files.

Before you start

If the user's message only invokes this skill (e.g. "use penguin-cli skill") without a concrete request, ask the user what they want to configure. Do not run any command until the goal is clear.

Models

Add or update a model (upsert by the (provider, model_id) pair; re-run with more options to amend an entry):

bash
penguin config model add --provider <group> --model-id <upstream_id> [--api-key <key>] [--base-url <url>] \
  [--client-type <type>] [--context-window <n>] [--max-tokens <n>] [--vision | --no-vision] \
  [--price-cache-read <n>] [--price-cache-write <n>] [--price-output <n>] \
  [--project-id <id>] [--root <dir>] [--set-default]

• A model is identified by the (provider, model_id) pair, so --provider and --model-id are both required — the group is never inferred from the model id, because gateways resell vendor models under their upstream ids and a wrong guess would send the key to another vendor's endpoint. --model-id takes the provider's upstream model id (what the API expects) and is persisted as the entry's request id, so it reaches the API unchanged; --provider names the group (deepseek, openai, anthropic, google, openrouter, siliconflow, … — custom for any other endpoint).
• For any OpenAI chat-completion compatible endpoint use --client-type openai --base-url <endpoint>; omit --client-type to auto-route by model id.
• Prices are USD per million tokens (cache read / cache write / output).
• --vision / --no-vision mark whether the model accepts images; omitting both keeps the current value (default is vision-capable).
• --max-tokens <n> pins a per-model output cap (positive integer), overriding the Agent's model.max_tokens; omit to inherit. Lower it for small-context models — the per-Agent default (32000) cannot fit into e.g. a 32k context window together with any prompt.
• All penguin config model ... and penguin config vault ... commands accept --root <dir> to target another data root (default PENGUIN_HOME, then ~/.penguin/data). Two configuration targets — treat the difference as a hard rule:
• Penguin's own model (self-configuration: the model Penguin itself runs on): the default root without --root is correct.
• An AI app you are building: --root must point at the app's own data directory inside the project (e.g. --root ./penguin_data, the same path the app gives createAgent({ root })) unless the user explicitly chose another location — never write an app's models or keys into the global ~/.penguin/data, which belongs to the person running Penguin, not to the app.
• While developing an app, review regularly: penguin config model list --root <app root> should show the app's entries, and the global list (no --root) should stay clean.

Other model commands:

bash
penguin config model default --model-id <upstream_id> --provider <group> [--root <dir>]   # set the project default model
penguin config model vision --model-id <upstream_id> --provider <group> [--root <dir>]    # set the project vision model (reads images for text-only sessions)
penguin config model list [--root <dir>]                      # list models; api_key is shown masked

Vault (per-agent secrets)

The vault holds an agent's environment-variable secrets (third-party API keys etc.); values are injected into that agent's shell subprocesses:

bash
penguin config vault set --key <NAME> --value <value> [--project-id <id>] [--agent-id <id>] [--root <dir>]
penguin config vault list [--project-id <id>] [--agent-id <id>] [--root <dir>]      # values are shown masked
penguin config vault remove --key <NAME> [--project-id <id>] [--agent-id <id>] [--root <dir>]

• --project-id defaults to default_project, --agent-id to default_agent.
• Key names follow shell variable rules (letter or underscore first, then letters, digits and underscores); values are limited to 8192 characters.

Language

bash
penguin config lang <en|zh>   # persist the CLI language via PENGUIN_LANG in your shell rc

Running agents

penguin run -m "<task>" [--provider <group> --model-id <id>] [--agent-id <id>] [--workspace <path>] [--approve <mode>] runs one task; penguin chat [--resume [session_id]] starts or resumes an interactive chat with the same options. The model reference stays a pair here too: pass --provider and --model-id together, or neither to run on the project's default model — one without the other is rejected.

Storage

Paths use <app_data_dir>, the App Data Dir value from your Environment section.

• <app_data_dir>/.project_config.toml — the project's single hidden config file: model list, settings and per-model credentials (api_key etc. inlined in each model entry). Configuration is CLI-only — never read, print or hand-edit this file.
• <app_data_dir>/agents/<agent_id>/agent_state/.vault.toml — that agent's vault entries, hidden file; same rule, manage it with penguin config vault.