App Settings Tool

The app_settings MCP tool lets agents read and write an allowlisted set of RepoPrompt's global preferences — appearance, prompt packaging, preferred models and the Oracle roster, Context Builder's agent/model, preset visibility, Code Maps, file scanning, selected Agent Mode preferences, and notifications — without opening the Settings UI. Credentials and workspace-specific profiles are not exposed.

tip

Companion pages: Use this page for the MCP/JSON surface. The same arguments can be sent with rpce-cli after CLI installation. See Settings Reference for the in-app controls.

When to Use It

• Match the user's preferred appearance or prompt packaging before building a copy preset.
• Review mcp.show_model_presets when configuring Oracle discovery.
• Reset models.planning_model to null so RepoPrompt falls back to defaults.
• Temporarily disable Code Maps globally via code_maps.globally_disabled during large refactors.
• Inspect file-scanning and notification preferences without editing the raw settings document.

Operations

op	Selectors	Purpose
list	optional group	Browse the allowlist catalog. Each entry includes the current value and, for keys that have them, options_available: true.
get	exactly one of key, keys, group	Read one or more setting values. Selectors are mutually exclusive.
set	key and value	Update exactly one setting. keys and group are rejected on set.
options	key, optional agent, limit, detailed	List candidate values for keys that advertise options_available: true, including model and font-scale settings.

Parameters

Parameter	Type	Notes
op	list | get | set | options	Required.
group	string	ui, prompt_packaging, models, context_builder, mcp, code_maps, file_system, agent_mode, or notifications. Used by list and as a selector for get.
key	string	Fully-qualified key (e.g. ui.appearance_mode). Required for set; optional selector for get.
keys	array of string	Multi-key selector for get. Mutually exclusive with key and group.
value	boolean, number, string, string array, or null	Required on set. Match the catalog's declared type: the additional Oracle roster uses an array, while prompt_packaging.prompt_sections_order uses a string containing a JSON array.
agent	string	For options on model settings: filter candidates to a supported CLI backend, such as claudeCode or codexExec.
limit	integer	For options: maximum number of candidates returned (1–200, default 60).
detailed	boolean	For options: include descriptions and model metadata in each candidate.

Groups

The allowlist is organized into nine groups so an agent can browse narrowly before reaching for set. If you are not sure about the exact key, type, or allowed values, call list first; set validates strictly and rejects unknown or out-of-range values without partial application. The returned catalog is the authority for the running build, including any debug-only entries.

ui — Appearance and chrome

Key	Type	Details
ui.appearance_mode	string enum	System | Light | Dark. App appearance mode.
ui.show_tooltips	boolean	Whether RepoPrompt shows app tooltips.
ui.enable_keyboard_shortcuts	boolean	Global keyboard shortcuts. New/changed shortcuts may only take effect after reopening a window.
ui.font_scale	number	An app font-size preset value. Use list and options for accepted values; arbitrary sizes are rejected.

prompt_packaging — How prompts are assembled

Key	Type	Details
prompt_packaging.prompt_sections_order	string containing a JSON array	The wire value is a string, not a native JSON array. Its decoded array must contain each prompt section exactly once. Call {"op":"list","group":"prompt_packaging"} first and read allowed_items for the canonical section raw values before sending set.
prompt_packaging.duplicate_user_instructions_at_top	boolean	Whether user instructions are duplicated at the top of packaged prompts.
prompt_packaging.file_path_display_option	string enum	Full | Relative. How file paths are displayed in packaged context.
prompt_packaging.selected_files_sort_method	string enum	nameAscending | nameDescending | tokenAscending | tokenDescending.
prompt_packaging.include_datetime_in_user_instructions	boolean	Whether packaged user instructions include the current date/time.

Legacy editing preferences

The current allowlist has no editing group. Classic keys such as editing.file_edit_format, editing.allow_diff_models_to_rewrite, and editing.complex_edit_strategy should not be sent to this tool. Configure the relevant UI workflow instead; the current Oracle send contract offers chat, plan, and review modes.

models — Model selection and inference defaults

Key	Type	Details
models.preferred_compose_model — Built-in Chat Model	string | null	Preferred Built-in Chat model raw identifier, if set. Advertises options_available: true. Set null to clear.
models.planning_model — Oracle Model	string | null	Preferred Oracle model raw identifier, if set. Advertises options_available: true. Set null to clear.
models.additional_oracle_models	string array	Ordered additional Oracle model IDs, with at most four entries. The primary model is configured separately.
models.sync_chat_model_with_oracle — Sync Built-in Chat with Oracle	boolean	Whether the Built-in Chat model is kept in sync with the Oracle model.
models.temperature	number	Range 0.0–2.0. Only applied when models.temperature_enabled is true.
models.temperature_enabled	boolean	Whether the global temperature is sent with model requests.
models.custom_planning_prompt — Custom Oracle System Prompt	string	Custom system prompt used by the Oracle. Empty string restores the built-in default.

context_builder — Context Builder agent & model

Key	Type	Details
context_builder.agent	string enum	CLI agent used by Context Builder. Call list and read allowed_values for eligible backend IDs. Writes preserve the backend's remembered model when one exists, or use its default.
context_builder.model	string | null	Remembered model ID for the selected backend; null clears that slot. An unusable saved backend can read as null; inspect the agent catalog before setting a replacement. options normally scopes candidates to the current backend.

mcp — MCP preset visibility

Key	Type	Details
mcp.show_model_presets	boolean	Whether MCP model presets are exposed. Internal temporary suppression is separate and is not a durable allowlisted preference.

Auto-Start and live listener lifecycle controls remain in the app UI. The Classic mcp.auto_start example is not part of the current registry.

code_maps — Global Code Maps toggle

Key	Type	Details
code_maps.globally_disabled	boolean	When true, Code Maps are globally disabled and the MCP get_code_structure tool is suppressed.
code_maps.non_git_enabled	boolean	Opt in to Code Maps in non-Git folders.

file_system — Workspace folder scanning

These preferences affect scanning. Local .repo_ignore file contents remain repository content, rather than a scalar application setting.

Key	Type	Details
file_system.respect_repo_ignore	boolean	Honor RepoPrompt-specific ignore rules.
file_system.respect_cursorignore	boolean	Honor .cursorignore rules.
file_system.global_ignore_defaults	string	Global ignore patterns separated by newlines; limited to 20,000 characters.
file_system.enable_hierarchical_ignores	boolean	Honor ignore files in nested directories.
file_system.skip_symlinks	boolean	Skip symbolic links; the inverse of the UI's Follow symbolic links option.
file_system.show_empty_folders	boolean	Include empty folders in workspace listings.

agent_mode — Selected global behavior

Key	Type	Details
agent_mode.show_built_in_workflow_cleanup_guidance	boolean	Include housekeeping guidance in built-in Agent Mode workflow templates. Custom templates and external workflow instructions are separate.
agent_mode.codex_goal_support_enabled	boolean	Enable Codex goal-support feature configuration.
agent_mode.codex_reasoning_summaries_enabled	boolean	Request Codex reasoning summaries in Agent Mode; separate from reasoning effort.
agent_mode.claude_usage_quota_enabled	boolean	Passive run rate-limit diagnostics; does not connect a Claude account or authorize account usage reads.
agent_mode.codex_usage_quota_enabled	boolean	Observe-only Codex quota display preference. Quota readings are not returned over MCP.
agent_mode.usage_limits_display_enabled	boolean	Display already-enabled usage sources; does not connect a source or change routing.
agent_mode.provider_conversation_cleanup_action	enum	Provider conversation cleanup preference. Discover accepted values from list.
agent_mode.subagent_default_wait_seconds	integer enum	Default otherwise-quiet sub-agent wait: 120, 300, 600, 1200, 1800, or 3600 seconds.

notifications — Notification preferences

The registry exposes notification descriptor keys as booleans. Call {"op":"list","group":"notifications"} for the exact names, descriptions, and values in your build, then use a returned key with set. These preferences control app notification behavior; macOS notification authorization is managed by the operating system. See Notifications settings.

Examples (MCP JSON)

Each example shows the arguments object passed to app_settings:

The prompt-section order is JSON encoded inside the string-valued value. This example uses the section names declared in the application source; compare them with the running catalog's allowed_items before changing the order:

{
  "op": "set",
  "key": "prompt_packaging.prompt_sections_order",
  "value": "[\"fileMap\",\"fileContents\",\"gitDiff\",\"metaPrompts\",\"userInstructions\"]"
}

// Browse the full catalog (values always included)
{ "op": "list" }

// Inspect one group
{ "op": "list", "group": "ui" }

// Batch read a few keys
{ "op": "get", "keys": ["ui.appearance_mode", "mcp.show_model_presets"] }

// Toggle a boolean
{ "op": "set", "key": "ui.show_tooltips", "value": false }

// Update an enum
{ "op": "set", "key": "ui.appearance_mode", "value": "Dark" }

// Clear an optional model (null is valid for nullable keys)
{ "op": "set", "key": "models.planning_model", "value": null }

// Change a numeric setting
{ "op": "set", "key": "models.temperature", "value": 1.25 }

// Switch the Context Builder agent (remembered model is preserved)
{ "op": "set", "key": "context_builder.agent", "value": "codexExec" }

// List candidate models for the current Context Builder backend
{ "op": "options", "key": "context_builder.model" }

// Narrow candidates to one CLI backend
{ "op": "options", "key": "models.planning_model", "agent": "codexExec", "limit": 25 }

Error Behavior

• Unknown keys: Rejected with a clear error. Call list (or list with a group) to discover the correct key.
• Wrong types: Booleans, numbers, strings, and null are each validated against the entry's declared type.
• Out-of-range values: Numeric ranges (e.g. models.temperature 0.0–2.0) and enum values are enforced.
• No partial application: Validation fails closed — if any check fails, nothing is written.
• One key per set: Passing keys or group on set is rejected.

Safety & Deliberately Excluded

This surface is intentionally narrow. The following are not reachable through app_settings and must be managed in the Settings UI:

• API credentials and raw provider secrets for any provider.
• MCP tool ACLs, auto-start lifecycle controls (mcp.auto_start), and agent permission documents.
• Workspace approvals and workspace-scoped chat/copy settings.
• Agent permission policies, human-only strict approval controls (specifically agent_mode.codex_hook_approval_strict_mode_enabled, which is classified in humanOnlySettingKeys and explicitly rejected over MCP), and workspace model override dictionaries. Selected durable global Agent Mode preferences are explicitly allowlisted above.
• Internal migration flags and settings absent from the catalog. Development builds can expose additional diagnostic entries; do not assume they exist in release builds.

If a preference is dangerous, secret, or workspace-specific, it is kept UI-only by design. Agents can still discover what is reachable with op=list.

See Also

• Setup Guide — install terminal access with rpce-cli.
• MCP Tools Reference — schemas for every MCP tool.
• Settings Reference — the in-app Settings UI equivalents.
• MCP Server Overview — IDE-for-agents framing and capability map.