Seeing that arcade-ai==2.2.3 doesn't allow for core, serve, or tdk
versions 3.x.x and that it doesn't know about arcade-mcp-server or
arcade-mcp, I feel confident that we can get this past the release
candidate stage. The current state of our documentation
(docs.arcade.dev) still references the 'old way' of doing things, so we
can gradually introduce these new packages to users without the hassle
of specifying pre release flags when installing
### New packages:
arcade-mcp==1.0.0
arcade-mcp-server==1.0.0
### Breaking change with major bump:
arcade-core==3.0.0 from 2.4.0
arcade-serve==3.0.0 from 2.1.0
arcade-tdk==3.0.0 from 2.5.0
### Deprecated:
arcade-ai==2.2.3
TLDR;
The philosophy of CLI usage is "fire and forget" and "best effort". You
can opt out by setting `ARCADE_USAGE_TRACKING=0`.
We are capturing two events: `CLI execution succeeded` and `CLI
execution failed`. Reporting to PostHog is a short lived (maximum 10
seconds) subprocess that does not block the main CLI execution process.
`~/.arcade/usage.json` persists two values `anon_id` and
`linked_principal_id`. The logged in status of the CLI user determines
which ID is used. Upon `arcade login`, the `anon_id` is aliased with
`linked_principal_id`. Upon `arcade logout` the `linked_principal_id` is
removed and the `anon_id` is rotated.
## CLI Usage Tracking - How It Works
The usage tracking system implements an identity management and event
tracking pipeline. Here's how the pieces work together:
### **Identity State Management (`usage.json`)**
The system maintains a persistent identity file at
`~/.arcade/usage.json` with this structure:
```json
{
"anon_id": "uuid",
"linked_principal_id": "uuid" | null
}
```
**Key mechanics:**
- **`anon_id`**: Generated once on first CLI use and persists across
sessions. This UUID tracks all anonymous activity.
- **`linked_principal_id`**: Initially `null`. Once the user logs in and
we successfully alias their identity, this field stores their
`principal_id` to indicate this `anon_id` has been linked.
- **Atomic writes**: All updates use a temp file + atomic rename pattern
to prevent corruption from concurrent CLI processes
- **File locking**: Uses `fcntl` (Unix) to coordinate reads/writes
across multiple simultaneous CLI invocations
- **In-memory cache**: The `UsageIdentity` class caches the loaded data
to avoid repeated file I/O within a single CLI invocation
### **Identity Resolution Flow**
When tracking an event, the system determines the `distinct_id` (who to
attribute the event to) via this waterfall:
1. **Check `linked_principal_id`** in `usage.json`
- If present → use it (user was previously aliased)
- This is the fastest path and avoids API calls
2. **Fetch `principal_id` from Arcade Cloud API**
- Makes HTTP request to `/api/v1/auth/validate` with the user's API key
from `~/.arcade/credentials.yaml`
- If authenticated → returns `principal_id`
- Has 2s timeout for responsiveness
3. **Fall back to `anon_id`**
- If not authenticated or API call fails → use anonymous ID
- Marks event with `is_anon=True` flag
### **The Aliasing Lifecycle**
PostHog aliasing links anonymous activity to authenticated users. Here's
the state machine:
#### **Stage 1: Anonymous User**
```
usage.json: { "anon_id": "abc-123", "linked_principal_id": null }
All events → sent with distinct_id="abc-123" and is_anon=True
```
#### **Stage 2: Login Event**
1. User runs `arcade login`
2. Command completes successfully (auth token saved)
3. `CommandTracker` detects successful login
4. Fetches `principal_id` from API
5. Checks `should_alias()` → returns `True` because
`linked_principal_id` is `null`
6. **Calls `alias()` synchronously** (blocking):
```python
posthog.alias(previous_id="abc-123", distinct_id="zyx-321")
```
7. Updates `usage.json`:
```json
{ "anon_id": "abc-123", "linked_principal_id": "zyx-321" }
```
8. PostHog backend merges all events with `distinct_id="abc-123"` into
the user profile for `"zyx-321"`
#### **Stage 3: Authenticated User**
```
usage.json: { "anon_id": "abc-123", "linked_principal_id": "zyx-321" }
All events → sent with distinct_id="zyx-321" and is_anon=False
```
- Events are directly attributed to the authenticated user
- No more API calls needed (uses cached `linked_principal_id`)
#### **Stage 4: Logout Event**
1. User runs `arcade logout`
2. Logout event is sent with the authenticated `distinct_id`
3. `CommandTracker` detects successful logout
4. **Rotates identity** by calling `reset_to_anonymous()`:
```json
{ "anon_id": "xyz-789", "linked_principal_id": null }
```
5. New `anon_id` prevents cross-contamination if another user logs in
### **Critical Constraint: Alias Timing**
PostHog requires that `alias()` is called **BEFORE** any events are sent
with the new `distinct_id`. This is why:
- **`alias()` is synchronous (blocking)**: Guarantees it completes
before the login success event is sent
- **Subsequent events use `linked_principal_id`**: Once aliased, all
future events use the authenticated ID
- **Lazy aliasing**: If a user authenticates via another mechanism (not
through `arcade login`), the system detects this on the next command and
performs aliasing before sending that command's event
### **Event Capture Pipeline**
When `CommandTracker.track_command_execution()` is called:
1. **Resolve identity** → determines `distinct_id` and `is_anon` flag
2. **Build event properties**:
```python
{
"command_name": "toolkit.run",
"cli_version": "1.2.3",
"python_version": "3.11.0",
"os_type": "Darwin",
"os_release": "23.4.0",
"duration": 1250.42, # milliseconds
"error_message": "..." # if failed
}
```
3. **Call `UsageService.capture()`**:
- Serializes event data to JSON
- Spawns detached subprocess: `python -m arcade_cli.usage`
- Passes data via `ARCADE_USAGE_EVENT_DATA` env var
- **Returns immediately** (non-blocking)
4. **Detached subprocess (`__main__.py`)**:
- Runs independently, survives parent CLI exit
- Deserializes event data
- If `is_anon=True`, sets `$process_person_profile=False` (tells PostHog
not to create a full profile)
- Sends event to PostHog with 5s timeout
- Exits (hard exit after 10s max via timeout thread)
### **Concurrency Handling**
Multiple CLI processes can run simultaneously. The system handles this
via:
- **File locking** on `usage.json` (shared lock for reads, exclusive for
writes)
- **Atomic writes** via temp files ensure incomplete writes never
corrupt the file
- **Idempotent aliasing**: `should_alias()` prevents redundant alias
calls
### **Edge Cases Handled**
1. **Side-channel authentication**: User authenticates outside of
`arcade login` (e.g., manually editing credentials)
- Detected via "lazy aliasing" check on every command
- Performs alias if `linked_principal_id` doesn't match current
`principal_id`
2. **API failures during identity fetch**: Falls back to anonymous
tracking
- 2s timeout prevents hanging
- Silent failure doesn't disrupt CLI
3. **PostHog merge restrictions**: Can't alias returning users who
already have a profile
- System stores `linked_principal_id` to avoid retrying impossible
aliases
- New users (never logged in before) get full history stitched
4. **Multiple accounts on same machine**: Logout rotates `anon_id`
- User A's anonymous activity won't leak into User B's profile
### **Privacy & Performance**
- **Opt-out**: `ARCADE_USAGE_TRACKING=0` disables all tracking
- **Non-blocking**: Events never slow down CLI (detached subprocess)
- **Anonymous profiles**: `$process_person_profile=False` for `anon_id`
events minimizes data collection
- **Silent failures**: Network issues or PostHog errors never surface to
users
1. Updates docs to prefer `uv run server.py` instead of `arcade mcp` or
`python -m arcade_mcp_server`
2. Found a bug with running stdio servers while updating the docs, so i
snuck that in this PR
- Updates the `arcade docs` templates, dir/file paths, and URL paths to
reflect the new docs repo structure
- References "MCP Server" instead of "toolkit"
- Auto-detects when it's a Starter MCP server and adds the corresponding
warning in the main doc page
- Fixes a bug that generated the wrong file path to the Python & JS
examples when the package name had an underscore character)
- Introduces some minor improvements, such as pulling the MCP Server
description for `ToolInfo` from the package `pyproject.toml`, instead of
a standard description varying only the MCP Server name
---------
Co-authored-by: Eric Gustin <34000337+EricGustin@users.noreply.github.com>
# Release Candidate 2
## This PR:
- [x] No more confusing 307 redirect logs when using `/mcp` instead of
`/mcp/` (requested by @shubcodes)
- [x] Fix bug in `arcade configure` for Python < 3.12 (reported by
@evantahler
- [x] Fix bug where tools with unsatisfied secret requirements could
still be executed (reported by @evantahler, @shubcodes)
- [x] Auth providers can now be imported via `from
arcade_mcp_server.auth import Reddit` (requested by @shubcodes)
- [x] Add complete E2E oauth flow for tool calls with informational
errors about how to log into arcade and where to go to authorize
(requested by @evantahler, @shubcodes)
- [x] Add OAuth tool in `arcade new`'s generated server (requested by
@shubcodes)
- [x] Standardize on defaulting to running servers on port 8000
- [x] Improve credentials.yaml reading logic
- [x] CLI user friendliness (requested by @Spartee)
- [x] Remove `arcade serve` CLI command
- [x] Fix race condition in `arcade logout`
- [x] Update docs for desired developer onboarding flow
## Next PRs:
- Get `arcade deploy` working for MCP servers. (Command is hidden for
now)
- Rename all occurrences of `toolkit` to `server`/`tools` and rename all
occurrences of `worker` to `server`
Versions:
* arcade-mcp\==1.0.0rc1
* arcade-mcp-server\==1.0.0rc1
* arcade-core\==2.5.0rc1
* arcade-tdk\==2.6.0rc1
* arcade-serve\==2.2.0rc1
### Summary
Adds first-class MCP support across Arcade, introduces a new MCP server
and CLI, unifies the project under the arcade-mcp name, overhauls
templates/scaffolding, and improves developer tooling, secrets
management, and examples.
### Highlights
- **MCP Server & Core**
- New MCP server with stdio and HTTP/SSE transports, session management,
resumability, and lifecycle handling.
- FastAPI-like `MCPApp` for building servers with lazy init; integrated
worker+MCP HTTP app option.
- Middleware system (logging and error handling), robust exception
hierarchy, and Pydantic-based settings.
- Async-safe managers for tools, resources, and prompts backed by
registries and locks.
- Developer-facing, transport-agnostic runtime context interfaces (logs,
tools, prompts, resources, sampling, UI, notifications).
- Conversion from Arcade ToolDefinition to MCP tool schema; OpenAI JSON
tool schema converter.
- Parser supports `@app.tool`/`@app.tool(...)` decorators.
- **CLI**
- New `mcp` command to run MCP servers with stdio or HTTP/SSE.
- New `secret` command to set/list/unset tool secrets (supports .env
input, preserves original casing for lookups).
- `new` command refactored; option to create a full toolkit package with
scaffolding.
- `chat` command removed.
- `serve.py` imports updated to `arcade_serve.fastapi.telemetry`;
version retrieval now uses `arcade-mcp`.
- `show.py` refactor to use new local catalog utilities.
- `display_tool_details` improved: adds “Default” column and handles
nested properties.
- **Configuration & Discovery**
- New `configure.py` to set up Claude Desktop, Cursor, and VS Code to
connect to local or Arcade Cloud MCP servers.
- Discovery utilities to find/install toolkits, build `ToolCatalog`s,
analyze files for tools, load kits from directories (pyproject parsing),
and build minimal toolkits.
- Better handling of provider API key resolution and evaluation suite
loading.
- **Templates & Scaffolding**
- Reorganized template structure (minimal vs full); moved
`.pre-commit-config.yaml`, `.ruff.toml`, license, Makefile, README,
tests, and tools layout to correct paths.
- Minimal template adds `.env.example` for runtime secret injection.
- Template pyproject updated for MCP servers; includes sample server
with greeting and secret-reveal tools.
- Authorization flow in templates simplified.
- **Repo-wide Renaming & Examples**
- Migrates references from `arcade-ai` to `arcade-mcp` across READMEs,
scripts, and package metadata.
- Examples updated (LangChain/LangGraph/AI SDK/TypeScript) and package
name changed to `arcade-mcp-sdk`.
- **Evals & Core Utilities**
- Evals now use OpenAI tooling format (`OpenAIToolList`, `to_openai`);
`tool_eval` takes `provider_api_key`.
- Core utilities: fixed `does_function_return_value` by dedenting before
parse; version bump to `2.5.0rc1` and dependency cleanup.
- **Tooling & CI**
- `setup-uv-env` action splits toolkit vs contrib dependency
installation.
- Pre-commit: excludes `libs/arcade-mcp-server/mkdocs.yml` and
`libs/tests/` from YAML and Ruff hooks; Ruff per-file ignores (e.g.,
C901 in `libs/**/*.py`, TRY400 in server docs paths).
- Makefile updates for uv env setup, quality checks, tests, builds, and
new `shell` target.
- Added Makefile to MCP server library to streamline dev workflow.
- **Cleanup**
- Removed `claude.json` config.
- Simplified stdio entrypoint; removed unused imports (`arcade_gmail`,
`arcade_search`).
### Breaking Changes
- **CLI**: `chat` command removed; use `mcp`, `secret`, and updated
`new`.
- **Naming**: All users should update references from `arcade-ai` to
`arcade-mcp`.
- **Templates**: File paths moved; downstream scripts referencing old
template locations may need updates.
### Getting Started
- Run an MCP server:
- `arcade mcp --stdio --toolkits your_toolkit`
- `arcade mcp --http --toolkits your_toolkit`
- Manage secrets:
- `arcade secret set your_toolkit KEY=value`
- `arcade secret list your_toolkit`
- `arcade secret unset your_toolkit KEY`
- Configure clients:
- `arcade configure` to set up Claude Desktop, Cursor, and VS Code for
local/Arcade Cloud MCP.
---------
Co-authored-by: Sam Partee <sam@arcade-ai.com>
Co-authored-by: Shub <125150494+shubcodes@users.noreply.github.com>
# [PROD-215](https://app.clickup.com/t/9014390315/PROD-215) 🎫
Added:
- SlackErrorAdapter for tools using Slack oauth provider.
---------
Co-authored-by: Francisco Liberal <francisco@arcade.dev>
# Improvements to Arcade TDK Error Handling
I tried my very best to not make any breaking changes in this PR. So,
you will notice various "Deprecation" notices throughout.
### Instructions for PR reviewers
1. Pull down this PR's branch
2. Pull down the Engine's tool error handling PR's branch
3. Update your installed arcadepy to have the following:
- In `arcadepy/resources/tools/tools.py`, if you want to test out
including stacktraces, then you need to update `ToolsResource.execute`
to accept a `include_error_stacktrace` argument and also include the
"include_error_stacktrace" argument to the POST to the Engine inside of
the function's execute method's body.
- In `arcadepy/types/execute_tool_response.py` add the following enum
```py
class ErrorKind(str, Enum):
"""Error kind that is comprised of
- the who (toolkit, tool, upstream)
- the when (load time, definition parsing time, runtime)
- the what (bad_definition, bad_input, bad_output, retry,
context_required, fatal, etc.)"""
TOOLKIT_LOAD_FAILED = "TOOLKIT_LOAD_FAILED"
TOOL_DEFINITION_BAD_DEFINITION = "TOOL_DEFINITION_BAD_DEFINITION"
TOOL_DEFINITION_BAD_INPUT_SCHEMA = "TOOL_DEFINITION_BAD_INPUT_SCHEMA"
TOOL_DEFINITION_BAD_OUTPUT_SCHEMA = "TOOL_DEFINITION_BAD_OUTPUT_SCHEMA"
TOOL_RUNTIME_BAD_INPUT_VALUE = "TOOL_RUNTIME_BAD_INPUT_VALUE"
TOOL_RUNTIME_BAD_OUTPUT_VALUE = "TOOL_RUNTIME_BAD_OUTPUT_VALUE"
TOOL_RUNTIME_RETRY = "TOOL_RUNTIME_RETRY"
TOOL_RUNTIME_CONTEXT_REQUIRED = "TOOL_RUNTIME_CONTEXT_REQUIRED"
TOOL_RUNTIME_FATAL = "TOOL_RUNTIME_FATAL"
UPSTREAM_RUNTIME_BAD_REQUEST = "UPSTREAM_RUNTIME_BAD_REQUEST"
UPSTREAM_RUNTIME_AUTH_ERROR = "UPSTREAM_RUNTIME_AUTH_ERROR"
UPSTREAM_RUNTIME_NOT_FOUND = "UPSTREAM_RUNTIME_NOT_FOUND"
UPSTREAM_RUNTIME_VALIDATION_ERROR = "UPSTREAM_RUNTIME_VALIDATION_ERROR"
UPSTREAM_RUNTIME_RATE_LIMIT = "UPSTREAM_RUNTIME_RATE_LIMIT"
UPSTREAM_RUNTIME_SERVER_ERROR = "UPSTREAM_RUNTIME_SERVER_ERROR"
UPSTREAM_RUNTIME_UNMAPPED = "UPSTREAM_RUNTIME_UNMAPPED"
UNKNOWN = "UNKNOWN"
```
- In `arcadepy/types/execute_tool_response.py` add the following fields
to OutputError:
```py
kind: ErrorKind
status_code: Optional[int] = None
stacktrace: Optional[str] = None
extra: Optional[dict[str, Any]] = None
```
### Example Client Usage
```py
# Example of handling an upstream rate limit
error = response.output.error
if error and error.kind == ErrorKind.UPSTREAM_RUNTIME_RATE_LIMIT:
sleep_time = error.retry_after_ms / 1000
time.sleep(sleep_time)
# and then execute again
```
```py
# Examples of determining what type of runtime error it is
error = response.output.error
if error:
is_retryable_error = error.kind == ErrorKind.TOOL_RUNTIME_RETRY
is_a_bug_in_the_tool = error.kind == ErrorKind.TOOL_RUNTIME_FATAL
is_additional_context_required = error.kind == ErrorKind.TOOL_RUNTIME_CONTEXT_REQUIRED
```
### Example Tool Usage
```py
# EXAMPLE 1 letting Arcade handle upstream error handling for you
reddit_client.post(params) # Arcade's httpx adapter will handle error handling for you!
# ------------------------------------
# EXAMPLE 2 handling upstream bad request yourself, but letting Arcade handle the rest
try:
reddit_client.post(params)
except httpx.HTTPStatusError as e:
if e.status_code == 400:
raise UpstreamError("My extra custom message) from e
raise
```
```py
# EXAMPLE 1 letting Arcade handle it for you
risky_element = my_risky_list[42] # Arcade will raise a FatalToolError for you
# ------------------------------------
# EXAMPLE 2 handling it yourself for extra flexibility
try:
risky_element = my_risky_list[42]
except IndexError as e:
raise FatalToolError("My extra custom message") from e
```
### Non-runtime Error Message Examples
Example ToolkitLoadError Messages:
```
- [TOOLKIT_LOAD_FAILED] ToolkitLoadError when loading toolkit 'sample_tool': Could not import module mock_module. Reason: Mock import error
- [TOOLKIT_LOAD_FAILED] ToolkitLoadError when loading toolkit 'test_toolkit': Tool 'ValidTool' in toolkit 'test_toolkit' already exists in the catalog.
```
Example ToolDefinitionError Messages
```
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_missing_description': Tool 'tool_missing_description' is missing a description
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_invalid_secret_type': Secret keys must be strings (error in tool ToolWithInvalidSecretType).
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_empty_secret': Secrets must have a non-empty key (error in tool ToolWithEmptySecret).
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_invalid_metadata_type': Metadata must be strings (error in tool ToolWithInvalidMetadataType).
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_metadata_requiring_auth_without_auth': Tool ToolWithMetadataRequiringAuthWithoutAuth declares metadata key 'client_id', which requires that the tool has an auth requirement, but no auth requirement was provided. Please specify an auth requirement.
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_empty_metadata': Metadata must have a non-empty key (error in tool ToolWithEmptyMetadata).
- [TOOL_DEFINITION_BAD_DEFINITION] ToolDefinitionError in definition of tool 'tool_with_unsupported_param_type': Unsupported parameter type: <class 'test_catalog.MyFancyTestClass'>
```
Example ToolInputSchemaError Messages
```
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_missing_input_parameter_annotation': Parameter 'input_text' is missing a description
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_no_type_annotation': Parameter param has no type annotation.
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_invalid_param_name': Invalid parameter name: '123invalid' is not a valid identifier. Identifiers must start with a letter or underscore, and can only contain letters, digits, or underscores.
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_too_many_annotations': Parameter param: Annotated[str, 'name', 'desc', 'extra'] has too many string annotations. Expected 0, 1, or 2, got 3.
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_required_union_param': Parameter param is a union type. Only optional types are supported.
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_non_callable_default_factory': Default factory for parameter param: Annotated[str, 'Parameter'] = FieldInfo(annotation=NoneType, required=False, default_factory=str) is not callable.
- [TOOL_DEFINITION_BAD_INPUT_SCHEMA] ToolInputSchemaError in definition of tool 'tool_with_multiple_tool_contexts': Only one ToolContext parameter is supported, but tool tool_with_multiple_tool_contexts has multiple.
```
Example ToolOutputSchemaError Messages
```
- [TOOL_DEFINITION_BAD_OUTPUT_SCHEMA] ToolOutputSchemaError in definition of tool 'tool_missing_return_type_hint': Tool 'ToolMissingReturnTypeHint' must have a return type
- [TOOL_DEFINITION_BAD_OUTPUT_SCHEMA] ToolOutputSchemaError in definition of tool 'tool_with_unsupported_output_type': Unsupported output type '<class 'test_catalog.MyFancyTestClass'>'. Only built-in Python types, TypedDicts, Pydantic models, and standard collections are supported as tool output types.
```
### Runtime Error Message Examples
Example Tool Runtime Error Messages
```
- [TOOL_RUNTIME_FATAL] FatalToolError during execution of tool 'get_posts_in_subreddit': list index out of range
- [TOOL_RUNTIME_CONTEXT_REQUIRED] ContextRequiredToolError during execution of tool 'get_posts_in_subreddit': Ambiguous username. Please provide a more specific username
- [TOOL_RUNTIME_RETRY] RetryableToolError during execution of tool 'get_posts_in_subreddit': Retry with subreddit=learnpython or subreddit=learnprogramming
```
Example Upstream Runtime Error Messages
```
- [UPSTREAM_RUNTIME_RATE_LIMIT] UpstreamRateLimitError during execution of tool 'get_posts_in_subreddit': 429 Client Error: Too Many Requests
- [UPSTREAM_RUNTIME_BAD_REQUEST] UpstreamError during execution of tool 'get_posts_in_subreddit': 400 Client Error: Bad request. Missing 'id' parameter.
- [UPSTREAM_RUNTIME_BAD_REQUEST] UpstreamError during execution of tool 'search_files': Upstream Google API error: Invalid value '-23'. Values must be within the range: [value: 1\n, value: 1000\n]
```
Improve Pydantic and Typedict support and add a bunch of tets.
1. Fixed the test failure where TypeDict was being serialized as a list
of tuples instead of a dict by:
- Adding proper handling for BaseModel instances in the output.py file
- Converting BaseModel results (from TypeDict conversion) to dicts using
model_dump()
- Handling lists containing BaseModel objects
2. Fixed None handling to ensure None results are converted to empty
strings as expected
3. Updated the schema.py to allow dict and list types in
ToolCallOutput.value
4. new tests
- TypeDict output execution tests
- Output factory tests
- Executor tests with TypeDict support
- Schema validation tests
The key changes were:
- In ``arcade_core/output.py``: Added BaseModel conversion logic in the
success method
- In ``arcade_core/schema.py``: Changed ToolCallOutput.value type from
list[str] to list to support complex types
TODO
- [ ] Confirm engine compatibility without changes made to engine
---------
Co-authored-by: Eric Gustin <eric@arcade.dev>
Adds support for GPT-5 series of models in `arcade docs`.
Improves error handling when the LLM does not generate a valid JSON for
a given tool sample inputs. Instead of raising an exception, the CLI
uses an empty input, moves on to the next tool, and prints a warning
message asking the user the fill in the input sample manually in
Javascript and Python files.
This PR also moves the Enumerations from a separate `reference.mdx` file
to the main toolkit file, as requested by @EricGustin to simplify the
docs structure.
Display "This tool does not take any parameters." when the tool
interface has no arguments other than context.
Prevent the same Enum from being referenced multiple times in the
reference.mdx file.
This PR updates the `arcade new` CLI command.
* adds support for official arcade tools.
* removes local libs sources for toolkits that are not a community or
official
* Stopped creating README for community toolkits
Renames the `arcade generate-toolkit-docs` command to `arcade docs`. The
`arcade generate-toolkit-docs` command is preserved for backwards
compatibility, but it's now hidden.
Also some minor improvements to CLI help strings and better error
handling. Better error description when the toolkit is not installed
locally (also now mentioning this requirement in the command help).
## Before
### Tool: ``GoogleNews.SearchNewsStories``
```python
@tool(requires_secrets=["SERP_API_KEY"])
async def search_news_stories(
context: ToolContext,
keywords: Annotated[
str,
"Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
],
country_code: Annotated[
CountryCode | None,
"2-character country code to search for news articles. "
"E.g. 'us' (United States). "
f"Defaults to '{DEFAULT_GOOGLE_NEWS_COUNTRY}'.",
] = None,
language_code: Annotated[
LanguageCode,
"2-character language code to search for news articles. E.g. 'en' (English). "
f"Defaults to '{DEFAULT_GOOGLE_NEWS_LANGUAGE}'.",
] = DEFAULT_GOOGLE_NEWS_LANGUAGE,
limit: Annotated[
int | None,
"Maximum number of news articles to return. Defaults to None "
"(returns all results found by the API).",
] = None,
) -> Annotated[dict[str, Any]]:
"""Search for news articles related to a given query."""
...
```
### Tool Definition: ``GoogleNews.SearchNewsStories``
```
{
"name": "SearchNewsStories",
"fully_qualified_name": "GoogleNews.SearchNewsStories",
"description": "Search for news articles related to a given query.",
"toolkit": {
"name": "GoogleNews",
"description": "Arcade.dev LLM tools for getting new via Google News",
"version": "2.0.0"
},
"input": {
"parameters": [
{
"name": "keywords",
"required": true,
"description": "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
},
"inferrable": true
},
{
"name": "country_code",
"required": false,
"description": "2-character country code to search for news articles. E.g. 'us' (United States). Defaults to 'None'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
},
"inferrable": true
},
{
"name": "language_code",
"required": false,
"description": "2-character language code to search for news articles. E.g. 'en' (English). Defaults to 'en'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
},
"inferrable": true
},
{
"name": "limit",
"required": false,
"description": "Maximum number of news articles to return. Defaults to None (returns all results found by the API).",
"value_schema": {
"val_type": "integer",
"inner_val_type": null,
"enum": null,
},
"inferrable": true
}
]
},
"output": {
"description": "News search results with article details.",
"available_modes": [
"value",
"error"
],
"value_schema": {
"val_type": "json"
}
},
"requirements": {
"authorization": null,
"secrets": [
{
"key": "serp_api_key"
}
],
"metadata": null
},
"deprecation_message": null
},
```
## After
### Enhanced Tool: ``GoogleNews.SearchNewsStories``
```python
"""Type definitions for Google News API responses and parameters."""
from typing_extensions import TypedDict
CountryCode = str
LanguageCode = str
class SearchNewsParams(TypedDict):
"""Input parameters for searching news articles."""
keywords: str
"""Search query terms to find relevant news articles \
(e.g., 'Apple launches new iPhone')."""
country_code: CountryCode | None
"""Optional 2-letter country code to filter news by region \
(e.g., 'us' for United States, 'uk' for United Kingdom)."""
language_code: LanguageCode | None
"""Optional 2-letter language code to filter news by language \
(e.g., 'en' for English, 'es' for Spanish)."""
limit: int | None
"""Optional maximum number of news articles to return. \
If not specified, returns all results from the API."""
class SourceInfo(TypedDict, total=False):
"""Information about the news source/publication."""
name: str
"""Name of the publication (e.g., 'CNN', 'BBC News', 'The New York Times')."""
icon: str
"""URL to the source's favicon or logo image."""
authors: list[str]
"""List of author names for the article, if available."""
class NewsResult(TypedDict, total=False):
"""Individual news article from the Google News API response."""
position: int
"""Ranking position of this result in the search results."""
title: str
"""Headline or title of the news article."""
link: str
"""Full URL to the original news article."""
source: SourceInfo
"""Information about the publication source."""
date: str
"""Publication date and time (e.g., '2 hours ago', 'Dec 15, 2023')."""
snippet: str
"""Brief excerpt or summary from the article content."""
thumbnail: str
"""URL to a high-resolution thumbnail image for the article."""
thumbnail_small: str
"""URL to a low-resolution thumbnail image for the article."""
story_token: str
"""Token for accessing full coverage of this news story across multiple sources."""
stories: list["NewsResult"]
"""Related news stories from other sources covering the same topic."""
highlight: dict
"""Additional highlighted information about the story."""
class SearchMetadata(TypedDict, total=False):
"""Metadata about the search request and processing."""
id: str
"""Unique identifier for this search request within SerpApi."""
status: str
"""Current processing status ('Processing', 'Success', or 'Error')."""
json_endpoint: str
"""URL to retrieve the JSON results for this search."""
created_at: str
"""Timestamp when the search request was created."""
processed_at: str
"""Timestamp when the search request was processed."""
google_news_url: str
"""Original Google News URL that would return these results."""
total_time_taken: float
"""Total time in seconds taken to process this search."""
class SearchParameters(TypedDict, total=False):
"""Parameters used for the search request."""
engine: str
"""Search engine used (always 'google_news' for this API)."""
q: str
"""Search query string."""
gl: str
"""Country code used for geographic filtering."""
hl: str
"""Language code used for language filtering."""
topic_token: str
"""Token for accessing specific news topics (e.g., 'World', 'Business', 'Technology')."""
publication_token: str
"""Token for accessing news from specific publishers."""
class MenuLink(TypedDict):
"""Navigation link for news categories or topics."""
title: str
"""Display text for the menu item (e.g., 'Technology', 'Sports', 'Business')."""
topic_token: str
"""Token to access this specific topic or category."""
serpapi_link: str
"""SerpApi URL to search within this topic."""
class TopStoriesLink(TypedDict):
"""Link to top stories section."""
topic_token: str
"""Token to access top stories."""
serpapi_link: str
"""SerpApi URL to retrieve top stories."""
class GoogleNewsResponse(TypedDict, total=False):
"""Complete response from the Google News API."""
search_metadata: SearchMetadata
"""Metadata about the search request and processing."""
search_parameters: SearchParameters
"""Parameters that were used for this search."""
news_results: list[NewsResult]
"""List of news articles matching the search criteria."""
menu_links: list[MenuLink]
"""Navigation links to different news categories and topics."""
top_stories_link: TopStoriesLink
"""Link to access top stories."""
title: str
"""Title of the page or topic being displayed."""
class SimplifiedNewsResult(TypedDict):
"""Simplified news article format for tool output."""
title: str
"""Headline of the news article."""
link: str
"""URL to the full article."""
source: str | None
"""Name of the publication source."""
date: str | None
"""When the article was published."""
snippet: str | None
"""Brief excerpt from the article."""
class SearchNewsOutput(TypedDict):
"""Output format for the search_news_stories tool."""
news_results: list[SimplifiedNewsResult]
"""List of news articles in simplified format."""
@tool(requires_secrets=["SERP_API_KEY"])
async def search_news_stories(
context: ToolContext,
keywords: Annotated[
str,
"Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
],
country_code: Annotated[
CountryCode | None,
"2-character country code to search for news articles. "
"E.g. 'us' (United States). "
f"Defaults to '{DEFAULT_GOOGLE_NEWS_COUNTRY}'.",
] = None,
language_code: Annotated[
LanguageCode,
"2-character language code to search for news articles. E.g. 'en' (English). "
f"Defaults to '{DEFAULT_GOOGLE_NEWS_LANGUAGE}'.",
] = DEFAULT_GOOGLE_NEWS_LANGUAGE,
limit: Annotated[
int | None,
"Maximum number of news articles to return. Defaults to None "
"(returns all results found by the API).",
] = None,
) -> Annotated[SearchNewsOutput, "News search results with article details."]:
"""Search for news articles related to a given query."""
...
```
### Enhanced Tool Definition: ``GoogleNews.SearchNewsStories``
```json
{
"name": "SearchNewsStories",
"fully_qualified_name": "GoogleNews.SearchNewsStories",
"description": "Search for news articles related to a given query.",
"toolkit": {
"name": "GoogleNews",
"description": "Arcade.dev LLM tools for getting new via Google News",
"version": "2.0.0"
},
"input": {
"parameters": [
{
"name": "keywords",
"required": true,
"description": "Keywords to search for news articles. E.g. 'Apple launches new iPhone'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": null
},
"inferrable": true
},
{
"name": "country_code",
"required": false,
"description": "2-character country code to search for news articles. E.g. 'us' (United States). Defaults to 'None'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": null
},
"inferrable": true
},
{
"name": "language_code",
"required": false,
"description": "2-character language code to search for news articles. E.g. 'en' (English). Defaults to 'en'.",
"value_schema": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": null
},
"inferrable": true
},
{
"name": "limit",
"required": false,
"description": "Maximum number of news articles to return. Defaults to None (returns all results found by the API).",
"value_schema": {
"val_type": "integer",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": null
},
"inferrable": true
}
]
},
"output": {
"description": "News search results with article details.",
"available_modes": [
"value",
"error"
],
"value_schema": {
"val_type": "json",
"inner_val_type": null,
"enum": null,
"properties": {
"news_results": {
"val_type": "array",
"inner_val_type": "json",
"enum": null,
"properties": null,
"inner_properties": {
"title": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": "Headline of the news article."
},
"link": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": "URL to the full article."
},
"source": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": "Name of the publication source."
},
"date": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": "When the article was published."
},
"snippet": {
"val_type": "string",
"inner_val_type": null,
"enum": null,
"properties": null,
"inner_properties": null,
"description": "Brief excerpt from the article."
}
},
"description": "List of news articles in simplified format."
}
},
"inner_properties": null,
"description": null
}
},
"requirements": {
"authorization": null,
"secrets": [
{
"key": "serp_api_key"
}
],
"metadata": null
},
"deprecation_message": null
},
```
---------
Co-authored-by: Eric Gustin <eric@arcade.dev>
## Summary
This PR removes the requirement that all toolkits must have the arcade_
prefix and introduces a more flexible toolkit discovery system using
Python entry points.
### 🏷️ Flexible Toolkit Naming
* Community toolkits: Only add arcade_ prefix when the user is in
arcade-ai/toolkits/ directory and explicitly chooses to create a
community contribution.
* External toolkits: No prefix requirement - developers can name their
toolkits however they want
* Toolkit names are now determined by user choice rather than enforced
automatically
### 🔍 Entry Point Discovery
* Added find_arcade_toolkits_from_entrypoints() method to discover
toolkits via entry points
* Entry point group: arcade_toolkits with name: toolkit_name
* Updated pyproject.toml template to include entry point configuration
* Entry point discovery takes precedence over prefix-based discovery for
deduplication
### 📦 Backward Compatibility
* Existing arcade_* prefixed toolkits continue to work via
find_arcade_toolkits_from_prefix()
find_all_arcade_toolkits() now combines both discovery methods
* Deduplication logic prefers entry point toolkits over prefix-based
ones when package names match
### 🛠️ `arcade new` Template Updates
* pyproject.toml template for `arcade new` now includes entry point
configuration: [project.entry-points.arcade_toolkits]
### 🔧 Minor Improvements
* Refactored _strip_arcade_prefix() into a separate method for
reusability
* Updated variable naming for clarity (community_toolkit →
is_community_toolkit)
### Benefits
* Developer Freedom: Toolkit developers are no longer forced to use the
arcade_ prefix. They are also no longer forced to use the package name
as the toolkit name.
* Cleaner Naming: External toolkits can use more natural names (e.g.,
my_company_toolkit instead of arcade_my_company_toolkit)
* Better Discovery: Entry points provide a more standard Python
mechanism for plugin discovery
* Flexible Distribution: Toolkits can be distributed with any package
name while still being discoverable
### Testing
* Added comprehensive tests for the new entry point functionality
* Tests cover edge cases like deduplication, error handling, and
backward compatibility
### Version Bumps
arcade-core: 2.0.0 → 2.1.0
arcade-ai: 2.0.5 → 2.1.0
This change makes the Arcade toolkit ecosystem more flexible and
developer-friendly while maintaining full backward compatibility with
existing toolkits.
---------
Co-authored-by: Mateo Torres <mateo@arcade.dev>
Say you are @shubcodes and running arcade on replit or vs codespaces.
Today, `arcade login` assumes that the browser you've opened for the
auth flow's "localhost" is the same that is running the `arcade login`
command. If you are running on one of these remote code execution
environments, that won't be true.
Usage:
```
arcade login --callback-host "https://replit.com:9999/path/to/my/codespace"
```
This reintroduces a question into `arcade new`, which adds the ruff and
pre-commit files into new toolkits that are aimed to be contributed back
to Arcade AI.
I use it in the toolkit building tutorial
---------
Co-authored-by: Evan Tahler <evantahler@gmail.com>
`arcade deploy` is failing for local packages that have large unneeded
files such as `uv.lock`. It is failing because it is taking too long for
the CLI to compress and PUT to the cloud.
The current `arcade new` command fails to `make install` and `make
check` if it's not manually patched with pre-commit files. It also fails
due to local dependencies if it's not run inside `arcade-ai/toolkits`
This PR patches the toolkit template to only include the local
dependencies if it detects is `arcade new` being run inside
`arcade-ai/toolkits`, it also makes pre-commit commands optional.
This is the first of a few PRs. Deploy to staging will fail until we
have `arcade-core`, `arcade-serve`, and `arcade-ai` released to PyPI.
This PR will release `arcade-core` to PyPI.
### PR Description
* Adds workflow that checks for changes in any pyproject.toml, and if
its version has changed, then tests, builds wheel, then publishes to
PyPI
* Updates the Dockerfile for our new structure
* Updates porter yamls
* Updates `make full-dist`
* Removes a couple unused workflows
Check out https://github.com/ArcadeAI/arcade-ai/actions/runs/15622059209
to see how the new workflow works (note that it failed publishing to
PyPI on purpose)
### Overview
Major restructuring from monolithic `arcade-ai` package to modular
library architecture with standardized uv-based dependency management.
### New Package Structure
- **`arcade-tdk`** - Lightweight toolkit development kit (core
decorators, auth)
- **`arcade-core`** - Core execution engine and catalog functionality
- **`arcade-serve`** - FastAPI/MCP server components
- **`arcade-ai`** - Meta package that includes CLI functionality.
Optionally include evals via the `evals` extra. Optionally include all
packages via the `all` extra.
### Key Benefits
- **Lighter Dependencies**: Toolkits now depend only on `arcade-tdk` (~2
deps) vs full `arcade-ai` (~30+ deps)
- **Faster Builds**: uv provides 10-100x faster dependency resolution
and installation
- **Better Modularity**: Clear separation of concerns, consumers import
only what they need
- **Standard Tooling**: Eliminates custom poetry scripts, uses standard
Python packaging
### Migration Impact
- All 20 toolkits converted from poetry → uv with `arcade-tdk`
dependencies plus `arcade-ai[evals]` and `arcade-serve` dev
dependencies. When developing locally, devs should install toolkits via
`make install-local`.
- Modern Python 3.10+ type hints throughout
- Standardized build system with hatchling backend
- Enhanced Makefile with robust toolkit management commands
- Removed `arcade dev` CLI command
- Reduce the number of files created by `arcade new` and add an option
to not generate a tests and evals folder.
This foundation enables faster development cycles and cleaner dependency
chains for the growing toolkit ecosystem.
### Todo After this PR is merged
- [ ] Post-merge workflow(s) (release & publish containers, etc)
- [ ] Release order plan. @EricGustin suggests releasing in the
following order:
1. `arcade-core` version 0.1.0
2. `arcade-serve` version 0.1.0 and `arcade-tdk` version 0.1.0
3. `arcade-ai` version 2.0.0
4. Patch release for all toolkits (all changes in toolkits are internal
refactors)
- [ ] [Update docs](https://github.com/ArcadeAI/docs/pull/318)
---------
Co-authored-by: Eric Gustin <eric@arcade.dev>
Co-authored-by: Eric Gustin <34000337+EricGustin@users.noreply.github.com>
