chore(claude): add claude code support for maintainers

.claude/.gitignore

@@ -0,0 +1,3 @@
+CLAUDE.local.md
+settings.local.json
+worktrees/

.claude/CLAUDE.md

@@ -0,0 +1,100 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Slack Bolt for Python -- a framework for building Slack apps. Built on top of `slack_sdk>=3.38.0,<4`. Supports both sync (`App`) and async (`AsyncApp`) patterns, with adapters for Flask, FastAPI, Django, AWS Lambda, and many other frameworks.
+
+## Environment Setup
+
+A virtual environment (`.venv`) should be activated before running any commands. If tools like `black`, `flake8`, or `pytest` are not found, ask the user to activate the venv.
+
+## Common Commands
+
+### Testing
+
+Always use the project scripts instead of calling `pytest` directly:
+```bash
+# Run all tests (installs deps, formats, lints, tests, typechecks)
+./scripts/install_all_and_run_tests.sh
+
+# Run a single test file
+./scripts/run_tests.sh tests/scenario_tests/test_app.py
+
+# Run a single test function
+./scripts/run_tests.sh tests/scenario_tests/test_app.py::TestApp::test_name
+```
+
+### Formatting, Linting, Type Checking
+```bash
+# Format (black, line-length=125)
+./scripts/format.sh --no-install
+
+# Lint (flake8, line-length=125, ignores: F841,F821,W503,E402)
+./scripts/lint.sh --no-install
+
+# Type check (mypy)
+./scripts/run_mypy.sh --no-install
+```
+
+### First-Time Setup
+```bash
+pip install -U -e .
+pip install -U -r requirements/testing.txt
+pip install -U -r requirements/adapter.txt
+pip install -U -r requirements/adapter_testing.txt
+pip install -U -r requirements/tools.txt
+```
+
+## Architecture
+
+### Request Processing Pipeline
+
+Incoming requests flow through a middleware chain before reaching listeners:
+
+1. **SSL Check** -> **Request Verification** (signature) -> **URL Verification** -> **Authorization** (token injection) -> **Ignoring Self Events** -> Custom middleware
+2. **Listener Matching** -- `ListenerMatcher` implementations check if a listener should handle the request
+3. **Listener Execution** -- listener-specific middleware runs, then `ack()` is called, then the handler executes
+
+For FaaS environments (`process_before_response=True`), long-running handlers execute as "lazy listeners" in a thread pool after the ack response is returned.
+
+### Core Abstractions
+
+- **`App` / `AsyncApp`** (`slack_bolt/app/`) -- Central class. Registers listeners via decorators (`@app.event()`, `@app.action()`, `@app.command()`, `@app.message()`, `@app.view()`, `@app.shortcut()`, `@app.options()`, `@app.function()`). Dispatches incoming requests through middleware to matching listeners.
+- **`Middleware`** (`slack_bolt/middleware/`) -- Abstract base with `process(req, resp, next)`. Built-in: authorization, request verification, SSL check, URL verification, assistant, self-event ignoring.
+- **`Listener`** (`slack_bolt/listener/`) -- Has matchers, middleware, and an ack/handler function. `CustomListener` is the main implementation.
+- **`ListenerMatcher`** (`slack_bolt/listener_matcher/`) -- Determines if a listener handles a given request. Built-in matchers for events, actions, commands, messages (regex), shortcuts, views, options.
+- **`BoltContext`** (`slack_bolt/context/`) -- Dict-like object passed to listeners with `client`, `say()`, `ack()`, `respond()`, `complete()`, `fail()`, plus event metadata (`user_id`, `channel_id`, `team_id`).
+- **`BoltRequest` / `BoltResponse`** (`slack_bolt/request/`, `slack_bolt/response/`) -- Request/response wrappers. Request has `mode` of "http" or "socket_mode".
+
+### Kwargs Injection
+
+Listeners receive arguments by parameter name. The framework inspects function signatures and injects matching args: `body`, `event`, `action`, `command`, `payload`, `context`, `client`, `ack`, `say`, `respond`, `logger`, `complete`, `fail`, `agent`, etc. Defined in `slack_bolt/kwargs_injection/args.py`.
+
+### Adapter System
+
+Each adapter in `slack_bolt/adapter/` converts between a web framework's request/response types and `BoltRequest`/`BoltResponse`. Adapters exist for: Flask, FastAPI, Django, Starlette, Sanic, Bottle, Tornado, CherryPy, Falcon, Pyramid, AWS Lambda, Google Cloud Functions, Socket Mode, WSGI, ASGI, and more.
+
+### Async Support
+
+`AsyncApp` mirrors `App` with async middleware, listeners, and context utilities. Located in `slack_bolt/app/async_app.py`. Requires `aiohttp`. All async variants live alongside their sync counterparts (e.g., `async_middleware.py` next to `middleware.py`).
+
+### AI Agents & Assistants
+
+`BoltAgent` (`slack_bolt/agent/`) provides `chat_stream()`, `set_status()`, and `set_suggested_prompts()` for AI-powered agents. `Assistant` middleware (`slack_bolt/middleware/assistant/`) handles assistant thread events.
+
+## Test Organization
+
+- `tests/scenario_tests/` -- Integration-style tests with realistic Slack payloads
+- `tests/slack_bolt/` -- Unit tests mirroring the source structure
+- `tests/adapter_tests/` and `tests/adapter_tests_async/` -- Framework adapter tests
+- `tests/mock_web_api_server/` -- Mock Slack API server used by tests
+- Async test variants use `_async` suffix directories
+
+## Code Style
+
+- **Black** formatter, 125 char line length
+- **Flake8** linter, 125 char line length
+- **MyPy** with `force_union_syntax=true` and `warn_unused_ignores=true` (use `X | Y` union syntax, not `Union[X, Y]`)
+- pytest with `asyncio_mode = "auto"`

.claude/settings.json

@@ -0,0 +1,31 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(./scripts/build_pypi_package.sh:*)",
+      "Bash(./scripts/format.sh:*)",
+      "Bash(./scripts/install_all_and_run_tests.sh:*)",
+      "Bash(./scripts/lint.sh:*)",
+      "Bash(./scripts/run_mypy.sh:*)",
+      "Bash(./scripts/run_tests.sh:*)",
+      "Bash(gh issue view:*)",
+      "Bash(gh label list:*)",
+      "Bash(gh pr checks:*)",
+      "Bash(gh pr diff:*)",
+      "Bash(gh pr list:*)",
+      "Bash(gh pr status:*)",
+      "Bash(gh pr update-branch:*)",
+      "Bash(gh pr view:*)",
+      "Bash(gh search code:*)",
+      "Bash(git diff:*)",
+      "Bash(git grep:*)",
+      "Bash(git log:*)",
+      "Bash(git show:*)",
+      "Bash(git status:*)",
+      "Bash(grep:*)",
+      "Bash(ls:*)",
+      "Bash(tree:*)",
+      "WebFetch(domain:github.com)",
+      "WebFetch(domain:docs.slack.dev)"
+    ]
+  }
+}

.gitignore

@@ -17,9 +17,6 @@ venv/
 .venv*
 .env/
 
-# claude
-.claude/*.local.json
-
 # codecov / coverage
 .coverage
 cov_*