Configuration files

Kimi Code CLI writes all long-term preferences — which model to use, which API key to fill in, how many steps an Agent can run per turn — into TOML (a plain-text configuration format with a clear structure) files. Change them once and they take effect on every startup. Agent and runtime settings live in config.toml; terminal-UI and client preferences (theme, editor, notifications, auto-update) live in a companion tui.toml.

Default location: ~/.kimi-code/config.toml, created automatically on first run.

Config file location

The CLI reads configuration from ~/.kimi-code/config.toml. To relocate the data directory, override it with the KIMI_CODE_HOME environment variable:

export KIMI_CODE_HOME=/path/to/kimi-home

The config file path then becomes $KIMI_CODE_HOME/config.toml. Regardless of where the directory lives, the file name is always config.toml.

TIP

TOML field names always use snake_case, for example default_model and max_context_size. If a key contains ., you must quote it — for example [models."gpt-4.1"] — otherwise TOML treats . as a nested table separator.

Complete example

The following example covers the most commonly used configuration fields. You can copy it and adjust as needed:

default_model = "kimi-code/kimi-for-coding"
default_thinking = true
default_permission_mode = "manual"
default_plan_mode = false
merge_all_available_skills = true
telemetry = true

[providers."managed:kimi-code"]
type = "kimi"
base_url = "https://api.kimi.com/coding/v1"
api_key = ""

[models."kimi-code/kimi-for-coding"]
provider = "managed:kimi-code"
model = "kimi-for-coding"
max_context_size = 262144

[thinking]
mode = "auto"

[loop_control]
max_retries_per_step = 3
reserved_context_size = 50000

[background]
max_running_tasks = 4
keep_alive_on_exit = false

[experimental]
goal_command = false
micro_compaction = false
background_ask = false

[[permission.rules]]
decision = "allow"
pattern = "Read"

[[permission.rules]]
decision = "deny"
pattern = "Bash(rm -rf*)"

[[hooks]]
event = "PreToolUse"
matcher = "Bash"
command = "node ~/.kimi-code/hooks/check-bash.mjs"
timeout = 5

Top-level fields

Fields in the config file fall into two categories: top-level scalars that directly control default behavior, and nested tables (providers, models, thinking, etc.) that each have their own structure, described individually in the sections below.

Field	Type	Default	Description
default_model	string	—	Default model alias; must be defined in models
default_thinking	boolean	false	Whether new sessions enable Thinking (deep reasoning) mode by default; can be toggled from the model menu inside a session. Even when set to true, [thinking].mode = "off" will still force Thinking off
default_permission_mode	string	manual	Default permission mode for new sessions; one of manual (prompt each time), auto (auto-approve read operations), or yolo (auto-approve everything)
default_plan_mode	boolean	false	Whether new sessions start in Plan mode (produce a plan before executing) by default
merge_all_available_skills	boolean	true	Whether to merge Agent Skills from all available directories
extra_skill_dirs	array<string>	—	Extra skill search directories, layered on top of the default directories
telemetry	boolean	true	Whether anonymous telemetry is enabled; disabled only when explicitly set to false
providers	table	{}	API provider table → providers
models	table	—	Model alias table → models
thinking	table	—	Default parameters for Thinking mode → thinking
loop_control	table	—	Agent loop control parameters → loop_control
background	table	—	Background task runtime parameters → background
experimental	table	—	Persistent experimental feature toggles → experimental
services	table	—	Built-in external service configuration → services
permission	table	—	Initial permission rules → permission
hooks	array<table>	—	Lifecycle hooks; see Hooks

The following sections cover each of the nested tables in turn: providers, models, thinking, loop_control, background, experimental, services, and permission.

providers

Each entry in the providers table defines an API provider, keyed by a unique name. The CLI reads credentials only from here — it does not fall back to shell environment variables automatically. Running export KIMI_API_KEY in the terminal does not give any provider its key; you must write it explicitly in the config file (see Config overrides).

Field	Type	Required	Description
type	string	Yes	Provider type: kimi, anthropic, openai, openai_responses, google-genai, vertexai
api_key	string	No	API key, written in plain text in the config file
base_url	string	No	API base URL
oauth	table	No	OAuth credential reference (storage and key fields); injected automatically by the login flow — normally no need to write this by hand
env	table<string, string>	No	Fallback source for provider credentials; see below
custom_headers	table<string, string>	No	Custom HTTP headers attached to each request

env sub-table: You can write provider-conventional key names (such as KIMI_API_KEY) inside [providers.<name>.env] as a fallback source for api_key / base_url. This sub-table is read only from the config file and does not modify the shell environment:

[providers.kimi.env]
KIMI_API_KEY = "sk-xxx"
KIMI_BASE_URL = "https://api.moonshot.ai/v1"

Priority: api_key field > env sub-table key > if both are absent, startup fails with an error.

models

Each entry in the models table defines a model alias (the name used in default_model or the -m flag), keyed by a unique name.

Field	Type	Required	Description
provider	string	Yes	Name of the provider to use; must be defined in providers
model	string	Yes	Model identifier sent to the server when calling the API
max_context_size	integer	Yes	Maximum context length in tokens; must be at least 1
max_output_size	integer	No	Per-request output token cap (maps to max_tokens). Currently only the anthropic provider honors it; recognized Claude models are automatically clamped to the server-side maximum
capabilities	array<string>	No	Capability tags to add explicitly: thinking, image_in, video_in, audio_in, tool_use. Unioned with the capabilities auto-detected by the provider — entries can only be added, never removed
display_name	string	No	Name shown in the UI; falls back to model when unset
reasoning_key	string	No	openai provider only. Override the field name used for reasoning content when the gateway returns it under a non-standard name; by default reasoning_content, reasoning_details, and reasoning are auto-detected
adaptive_thinking	boolean	No	anthropic provider only. Force adaptive thinking on or off, overriding the version inference based on the model name. Omit to infer automatically (Claude ≥ 4.6 uses adaptive)

When an alias contains ., use a quoted key:

[models."gpt-4.1"]
provider = "openai"
model = "gpt-4.1"
max_context_size = 1047576

You can also switch models temporarily without touching the config file — by setting KIMI_MODEL_* environment variables, the CLI synthesizes a temporary provider in memory that does not persist after restart. See Define a model from environment variables.

thinking

thinking sets the global default behavior for Thinking mode. mode = "off" forces Thinking off even when the top-level default_thinking = true.

Field	Type	Default	Description
mode	string	—	Trigger policy: auto (decided by the model), on (always on), off (force off)
effort	string	high	Thinking effort level: low, medium, high, xhigh, max; the levels actually available depend on the provider

loop_control

loop_control governs the step count limit, per-step retry count, and the threshold that triggers automatic context compaction in the Agent execution loop.

Field	Type	Default	Description
max_steps_per_turn	integer	—	Maximum steps per turn; unset or 0 means unlimited
max_retries_per_step	integer	3	Maximum retries after a step failure
reserved_context_size	integer	—	Number of tokens reserved for model output; automatic compaction is triggered when the remaining context window falls below this value

background

background controls the concurrency behavior of background tasks (launched via the Bash tool or the Agent tool's run_in_background=true parameter).

Field	Type	Default	Description
max_running_tasks	integer	—	Maximum number of background tasks running concurrently
keep_alive_on_exit	boolean	true	Whether to keep still-running background tasks when the session closes. Set to false to request that all background tasks stop before the process exits

keep_alive_on_exit can be overridden by the KIMI_CODE_BACKGROUND_KEEP_ALIVE_ON_EXIT environment variable, which takes higher priority than config.toml.

experimental

experimental stores persistent opt-ins for features that are not public by default yet. You can edit this table directly or run /experiments in the TUI. The TUI panel stages changes locally until you confirm them, then writes config.toml and reloads the current session. Each TOML key is the experimental flag ID, for example goal_command.

Field	Type	Default	Description
goal_command	boolean	false	Enable /goal and goal-management tools
micro_compaction	boolean	false	Trim older large tool results from context while preserving recent conversation
background_ask	boolean	false	Allow AskUserQuestion to start a background question task when the Agent can continue working

Environment variables take priority over this table. KIMI_CODE_EXPERIMENTAL_<NAME> overrides one feature, and KIMI_CODE_EXPERIMENTAL_FLAG=1 enables all experimental features for that process — see the full list in Environment variables → Runtime switches. When a feature is controlled by the environment, /experiments shows it as locked.

services

services configures two built-in services: web search (moonshot_search) and web fetch (moonshot_fetch). Only these two fixed keys are recognized; other keys are ignored. Both entries share the same fields:

Field	Type	Required	Description
base_url	string	No	Service API URL
api_key	string	No	API key
oauth	table	No	OAuth credential reference, same structure as providers.*.oauth
custom_headers	table<string, string>	No	Custom HTTP headers attached to each request

[services.moonshot_search]
base_url = "https://api.moonshot.cn/v1/search"
api_key = "sk-xxx"

[services.moonshot_fetch]
base_url = "https://api.moonshot.cn/v1/fetch"
api_key = "sk-xxx"

permission

permission sets permission rules that are automatically loaded when a session starts, controlling whether the Agent needs user confirmation before calling a tool. Rules are written as a [[permission.rules]] array of tables, matched in order — the first matching rule takes effect.

Field	Type	Required	Description
decision	string	Yes	Action on match: allow (permit immediately), deny (reject immediately), ask (prompt each time)
scope	string	No	Rule scope: turn-override, session-runtime, project, user; defaults to user
pattern	string	Yes	Match pattern in the form ToolName or ToolName(arg-pattern), e.g. Read or Bash(rm -rf*)
reason	string	No	Rule description for debugging and auditing

Built-in tool names are listed in Built-in tools; MCP tools and custom tools can only be matched by tool name — argument patterns are not supported for them.

[[permission.rules]]
decision = "allow"
pattern = "Read"

[[permission.rules]]
decision = "allow"
pattern = "Grep"

[[permission.rules]]
decision = "deny"
pattern = "Bash(rm -rf*)"

[[permission.rules]]
decision = "ask"
pattern = "Bash"

TIP

MCP server declarations are configured in ~/.kimi-code/mcp.json or the project-local .kimi-code/mcp.json, not in config.toml. The interactive configuration entry point is /mcp-config; see Model Context Protocol.

tui.toml

Alongside config.toml, the CLI keeps terminal-UI and client preferences in a companion tui.toml in the same directory (~/.kimi-code/tui.toml, or $KIMI_CODE_HOME/tui.toml when overridden). It is created with defaults on first run, and the interactive commands /config, /theme, and /editor write to it for you — so you rarely need to edit it by hand. If the file is malformed, the CLI falls back to defaults and shows a notice instead of failing to start.

Field	Type	Default	Description
theme	string	auto	Color theme: auto (follow the terminal), dark, or light
[editor].command	string	""	External editor command for composing long input; empty falls back to $VISUAL / $EDITOR
[notifications].enabled	boolean	true	Whether desktop notifications are sent
[notifications].notification_condition	string	unfocused	When to notify: unfocused (only when the terminal is not focused) or always
[upgrade].auto_install	boolean	true	Whether new versions are installed automatically

# ~/.kimi-code/tui.toml
theme = "auto" # "auto" | "dark" | "light"

[editor]
command = "" # empty uses $VISUAL / $EDITOR

[notifications]
enabled = true
notification_condition = "unfocused" # "unfocused" | "always"

[upgrade]
auto_install = true

Changes apply on the next start, or immediately with /reload-tui (which reloads only tui.toml); /reload reloads both config.toml and tui.toml.

Next steps

• Providers and models — connection examples for each provider type (Kimi, Claude, OpenAI, Gemini)
• Config overrides — priority rules for CLI options, config file, and environment variables
• Environment variables — complete list of runtime variables like KIMI_CODE_HOME