test: implement unit testing suite with pytest and add pre-push verification hook

.gitea/workflows/cicd.yml

@@ -103,9 +103,8 @@ jobs:
             
             # Check if Docker Image section already exists
             if [[ "$OLD_BODY" != *"## 🐳 Docker Image"* ]]; then
-              NEW_BODY="${OLD_BODY}\n\n## 🐳 Docker Image\n\`\`\`bash\ndocker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${TAG_NAME}\n\`\`\`"
+              jq -n --arg old "$OLD_BODY" --arg img "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${TAG_NAME}" \
-              
+                '{body: ($old + "\n\n## 🐳 Docker Image\n```bash\ndocker pull " + $img + "\n```")}' | \
-              jq -n --arg body "$NEW_BODY" '{body: $body}' | \
               curl -s -X PATCH \
                 -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                 -H "Content-Type: application/json" \

Dockerfile

@@ -27,8 +27,10 @@ RUN uv sync --frozen --no-dev
 # Make the executable available in the path
 ENV PATH="/app/.venv/bin:$PATH"
 
+# Default environment variables for the container
+ENV MCP_TRANSPORT=http
+ENV PORT=8000
+ENV HOST=0.0.0.0
+
 # Run the MCP server
-# By default, strava-mcp uses fastmcp.run() which exposes stdio.
-# If you want to run it as an SSE server, you might need to adjust the command.
-# For now, we just call the main entrypoint.
 ENTRYPOINT ["strava-mcp"]

README.md

@@ -10,10 +10,13 @@ Built with [FastMCP](https://github.com/jlowin/fastmcp) and the [MCP Python SDK]
 
 - 🛠️ **25+ MCP Tools** covering all major Strava API read endpoints (including athlete profile & stats)
 - 💬 **2 MCP Prompts** for structured AI-driven training analysis
-- 🔄 **Fully Automated OAuth** — authentication flow integrated directly as an MCP tool with auto-rotation
+- 🔄 **Automated OAuth** — authentication flow via a standalone setup script with auto-rotation
-- 🐳 **Docker-Ready** — highly optimized multi-stage Docker build utilizing `uv`
+- 🐳 **Multi-Arch Docker** — optimized builds for `linux/amd64` and `linux/arm64` powered by `uv`
+- 🏷️ **Dynamic Versioning** — versions are automatically derived from Git tags (powered by `hatch-vcs`)
+- 🤖 **Agent-First Design** — includes specific instructions for LLMs on handling European date formats (DD.MM.YYYY)
 - 🌐 **Streamable HTTP transport** for broad client compatibility (SSE)
 - 🔒 **Read-only** — no write operations, safe to use with AI agents
+- 📝 **Design Decisions** — documented architectural choices in `docs/DESIGN_DECISIONS.md`
 
 ---
 
@@ -24,10 +27,13 @@ Built with [FastMCP](https://github.com/jlowin/fastmcp) and the [MCP Python SDK]
   - [Docker (Recommended)](#docker-recommended)
   - [Local Python (uv)](#local-python-uv)
 - [Strava API Setup](#strava-api-setup)
-- [Connecting with MCP Inspector](#connecting-with-mcp-inspector)
+- [Connecting with MCP Clients](#connecting-with-mcp-clients)
 - [MCP Primitives](#mcp-primitives)
 - [Project Structure](#project-structure)
+- [Design Decisions](#design-decisions)
 - [CI/CD (Gitea Actions)](#cicd-gitea-actions)
+- [Development & Testing](#️-development--testing)
+  - [Git Hooks](#git-hooks)
 - [Known Strava API Limitations](#known-strava-api-limitations)
 - [Troubleshooting](#troubleshooting)
 
@@ -37,7 +43,7 @@ Built with [FastMCP](https://github.com/jlowin/fastmcp) and the [MCP Python SDK]
 
 - A [Strava account](https://www.strava.com) with API access
 - A [Strava API Application](https://www.strava.com/settings/api)
-- **Docker** (for containerized deployment) OR **Python 3.10+** & [uv](https://github.com/astral-sh/uv) (for local execution)
+- **Docker** (for containerized deployment) OR **Python 3.10+** & [uv](https://github.com/astral-sh/uv)
 
 ---
 
@@ -45,14 +51,14 @@ Built with [FastMCP](https://github.com/jlowin/fastmcp) and the [MCP Python SDK]
 
 ### Docker (Recommended)
 
-The project includes a highly optimized, deterministic Dockerfile powered by `uv`.
+The project includes a multi-arch Docker build (amd64/arm64).
 
 ```bash
 # Clone the repository
 git clone https://git.hnrx.net/hnrx/strava-mcp-server.git
 cd strava-mcp-server
 
-# Build the image
+# Build the image locally
 docker build -t strava-mcp-server:latest .
 
 # Run the container (injecting your .env file)
@@ -61,24 +67,29 @@ docker run --rm -p 8000:8000 --env-file .env strava-mcp-server:latest
 
 ### Local Python (uv)
 
+We use `uv` for lightning-fast dependency management and task execution.
+
 ```bash
 git clone https://git.hnrx.net/hnrx/strava-mcp-server.git
 cd strava-mcp-server
 
-# Install dependencies and start the server
+# Start the MCP server
-uv run strava-mcp
+uv run server
+
+# Run the OAuth setup script
+uv run auth
 ```
 
 ### Run on the fly with `uvx` (No git clone required)
 
-You can run the server directly from the repository without cloning it manually by using `uvx`. `uv` will download it into a temporary isolated environment and execute it:
+You can run the server directly from the repository without cloning it manually by using `uvx`:
 
 ```bash
 # Set up your .env file in the current directory first!
-uvx --from git+https://git.hnrx.net/hnrx/strava-mcp-server.git strava-mcp
+uvx --from git+https://git.hnrx.net/hnrx/strava-mcp-server.git server
 ```
 
-*(If you are already inside the cloned directory, you can also just run `uvx --from . strava-mcp`)*
+*(If you are already inside the cloned directory, you can also just run `uvx --from . server`)*
 
 ---
 
@@ -105,27 +116,22 @@ STRAVA_CLIENT_SECRET=your_client_secret_here
 
 ### 3. Authenticate (The Magic Way ✨)
 
-You **do not** need to manually fiddle with OAuth tokens. The server includes an interactive MCP tool to handle authentication!
+The server is designed for zero-touch deployment. You can authorize it **after** it has started.
 
-1. Start the server (`docker run ...` or `uv run strava-mcp`).
+1. **Start the server** (it will log a warning that the refresh token is missing, but it will boot!).
-2. Connect to the server via an MCP Client (like Claude Desktop or MCP Inspector).
+2. **Run the Auth Script**:
-3. Call the `get_new_oauth_token` MCP tool.
+   - Run `uv run auth` in your terminal on your local machine.
-4. Your browser will open for you to authorize the app. The server will intercept the callback locally, generate your tokens, and automatically save the `STRAVA_REFRESH_TOKEN` to your `.env` file!
+3. Your browser will open. Log in and authorize.
-
+4. **Success:** The browser will show you the exact values for your `.env` (or Kubernetes Secret). The script will also automatically update your local `.env` file!
-> **Required OAuth Scopes:**
-> `activity:read_all,profile:read_all,read`
 
 ---
 
 ## Connecting with MCP Clients
 
-The server listens on **port 8000** by default and exposes an SSE endpoint:
+The server listens on **port 8000** and exposes an SSE endpoint: `http://localhost:8000/mcp`
-`http://localhost:8000/mcp`
 
 ### Claude Desktop
-
+Add to `claude_desktop_config.json`:
-Add to your `claude_desktop_config.json`:
-
 ```json
 {
   "mcpServers": {
@@ -137,112 +143,132 @@ Add to your `claude_desktop_config.json`:
 }
 ```
 
-### MCP Inspector
-
-1. Open [MCP Inspector](https://inspector.modelcontextprotocol.io/)
-2. Select transport: **Streamable HTTP**
-3. Enter URL: `http://localhost:8000/mcp`
-4. Click **Connect**
-
 ---
 
 ## MCP Primitives
 
 ### Tools
 
-#### 🔐 Authentication
+| Category | Tools |
-| Tool | Description |
+|----------|-------|
-|------|-------------|
+| 🏃 **Athlete** | `get_athlete_profile`, `get_athlete_stats`, `get_athlete_zones` |
-| `get_new_oauth_token` | Starts the interactive browser OAuth2 flow to generate and save your initial Refresh Token |
+| 🚴 **Activities** | `list_activities`, `get_activity_details`, `get_activity_laps`, `get_activity_zones`, `get_activity_streams` |
-
+| 🏘️ **Clubs** | `get_athlete_clubs`, `get_club_activities`, `get_club_members` |
-#### 🏃 Athlete
-| Tool | Description |
-|------|-------------|
-| `get_athlete_profile` | Full athlete profile: name, city, country, follower count, gear list |
-| `get_athlete_stats` | Training totals: all-time, year-to-date, and last 4 weeks for runs, rides, and swims |
-| `get_athlete_zones` | Heart rate and power zones |
-
-#### 🚴 Activities
-| Tool | Description |
-|------|-------------|
-| `list_activities` | Paginated activity list with optional time range filters |
-| `get_activity_details` | Full activity details incl. segment efforts |
-| `get_activity_laps` | Lap splits |
-| `get_activity_zones` | Heart rate and power zones for a specific activity |
-| `get_activity_comments` | Comments on an activity |
-| `get_activity_kudoers` | Athletes who gave kudos |
-| `get_activity_streams` | Raw GPS/sensor data streams |
-
-*(Note: Additional tools exist for Clubs, Routes, Segments, Segment Efforts, and Gear. See MCP Inspector for full details.)*
-
-### Prompts
-
-Prompts pre-structure AI conversations with the right tool-calling instructions.
-
-- **`analyze_activity`**: Triggers a structured analysis of a specific activity including summary, performance metrics, and key takeaways.
-- **`training_summary`**: Generates a training load report for the last N weeks (volume, trends, recommendations).
 
 ---
 
-## Project Structure
+## Design Decisions
 
-```
+For a detailed list of architectural choices, unit standardizations, and LLM-specific optimizations, please refer to:
-strava-mcp-server/
+👉 **[docs/DESIGN_DECISIONS.md](docs/DESIGN_DECISIONS.md)**
-├── Dockerfile               # Multi-stage optimized uv build
-├── src/
-│   └── strava_mcp_server/   # Installable Python package
-│       ├── __init__.py
-│       ├── main.py          # Server entrypoint → strava-mcp
-│       ├── strava_client.py # Strava API client with auto token rotation
-│       └── tools/           # Modularized MCP tools directory
-│           ├── __init__.py  # Tool registry
-│           ├── activities.py
-│           ├── athlete.py
-│           ├── auth.py      # OAuth automation flow
-│           └── ...
-├── .gitea/
-│   └── workflows/           # Gitea Actions CI/CD Pipeline
-├── tests/
-├── pyproject.toml           
-└── .env                     
-```
 
 ---
 
 ## CI/CD (Gitea Actions)
 
-This repository includes a pre-configured Gitea Action (`.gitea/workflows/cicd.yml`) that automatically:
+Our pipeline (`.gitea/workflows/cicd.yml`) is fully automated:
-1. **Lints** the codebase using `ruff` on every push/PR.
+- **Linting:** Every push/PR is checked with `ruff`.
-2. **Builds & Pushes** the Docker container to the local Container Registry (`git.hnrx.net`) upon a successful merge to `main`.
+- **Multi-Arch Builds:** Builds `amd64` and `arm64` images simultaneously using QEMU and DinD.
-
+- **Smart Tagging:** 
----
+  - Pushes to `main` are tagged as `:latest`.
-
+  - Git Tags (e.g., `v1.2.0`) trigger a versioned build and **automatically update the Gitea Release description** with the correct `docker pull` command.
-## Known Strava API Limitations
-
-| Endpoint | Status | Reason |
-|----------|--------|--------|
-| `GET /segments/{id}/leaderboard` | `403 Forbidden` | Requires Strava API partnership |
-| `GET /segment_efforts/{id}` | `403 Forbidden` | Requires Strava API partnership |
-| `GET /athlete/zones` | `401 Unauthorized` | Requires `profile:read_all` OAuth scope |
-
-> **Workaround for segment efforts:** Use `get_activity_details` to access segment efforts embedded in activity data. The `segment_efforts[]` array contains effort IDs, times, heart rate, power, and PR/KOM ranks.
 
 ---
 
 ## Troubleshooting
 
 ### `[Errno 48] Address already in use`
-Port 8000 is occupied by a previous server process:
+`lsof -ti :8000 | xargs kill -9`
-```bash
-lsof -ti :8000 | xargs kill -9
-```
-
-### ModuleNotFoundError / iCloud Sync Issues (macOS)
-If you are developing locally on macOS and your `strava-mcp-server` directory is located inside `Documents/` or `Desktop/`, **iCloud Drive** will constantly sync and delete files inside your virtual environment (`.venv`), leading to missing packages. 
-**Solution:** Move the project out of iCloud or rename the folder to end in `.nosync` (e.g. `strava-mcp-server.nosync`).
 
 ### 401 Unauthorized
-Your refresh token has expired or been revoked. Simply run the `get_new_oauth_token` MCP tool again to re-authenticate!
+Your token expired. Run `uv run auth` to refresh.
+
+---
+
+## 🛠️ Development & Testing
+
+### 1. Local Testing with MCP Inspector
+
+The [MCP Inspector](https://github.com/modelcontextprotocol/inspector) is the best way to test the server without a full LLM client.
+
+**Option A: Test via STDIO (Fastest)**
+This runs the server directly in your terminal (perfect for local debugging):
+```bash
+npx @modelcontextprotocol/inspector uv run server
+```
+
+**Option B: Test via SSE (Remote/Docker)**
+If the server is already running (e.g., at `http://localhost:8000`):
+1. Open [https://inspector.modelcontextprotocol.io/](https://inspector.modelcontextprotocol.io/)
+2. Transport: **Streamable HTTP**
+3. URL: `http://localhost:8000/mcp`
+
+### 2. Manual SSE Health Check
+You can verify if the server is responding to SSE requests using `curl`:
+```bash
+curl -v -X POST http://localhost:8000/mcp
+```
+*(It should return an SSE stream starting with `event: endpoint`)*
+
+### 3. Linting & Formatting
+We use `ruff` for code quality:
+```bash
+# Run the check
+uv run ruff check src
+
+# Run the formatter
+uv run ruff format src
+```
+
+### 4. Build Multi-Arch Images
+To test if the multi-arch Docker build works locally (requires Docker Buildx):
+```bash
+docker buildx build --platform linux/amd64,linux/arm64 -t strava-mcp-server:test .
+```
+
+---
+
+### 5. Git Hooks
+
+Two hooks are provided in `scripts/hooks/` — install them both after cloning:
+
+```bash
+cp scripts/hooks/pre-commit .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit
+cp scripts/hooks/pre-push   .git/hooks/pre-push   && chmod +x .git/hooks/pre-push
+```
+
+#### `pre-commit` — Lint & Format check
+Runs on staged `.py` files before every commit.
+- 🔍 `ruff check` — linting
+- 🎨 `ruff format --check` — formatting
+- 🔧 Fix: `uv run ruff check --fix` + `uv run ruff format`
+- ⚡ Bypass: `git commit --no-verify`
+
+#### `pre-push` — Unit tests
+Runs the full unit test suite before every push.
+- 🧪 `pytest tests/unit/ -q`
+- ⚡ Bypass: `git push --no-verify`
+
+### 6. Unit Tests
+
+Fast, offline unit tests for pure functions and MCP helpers (no Strava API required).
+
+```bash
+# Run all unit tests
+uv run pytest tests/unit/ -v
+
+# Run with coverage (if pytest-cov is installed)
+uv run pytest tests/unit/ --cov=strava_mcp_server
+```
+
+**Test coverage:**
+| Module | Tests |
+|--------|-------|
+| `utils.py` — `parse_iso_to_unix` | `None`, empty, invalid, UTC, offset, date-only |
+| `utils.py` — `format_date_iso` | Normalization, `None`, datetime object, invalid |
+| `utils.py` — `format_date_human` | German format, `None`, datetime object, regex pattern |
+| `tools/*` — `_resource()` | Type, mimeType, URI, JSON validity, audience |
+| `tools/*` — `_user_text()` | Type, text value, audience |
 
 ---
 

docs/DESIGN_DECISIONS.md

@@ -0,0 +1,35 @@
+# Design Decisions - Strava MCP Server
+
+This document records key architectural and design decisions made during the development of the Strava MCP Server. It serves as a guide for AI agents and developers to maintain consistency.
+
+## 1. Date and Time Handling
+**Decision**: Standardize on ISO 8601 (UTC) for all internal data exchange, tool inputs, and tool outputs.
+**Date**: 2026-05-12
+**Context**: LLMs often struggle with ambiguous date formats (e.g., DD.MM.YYYY vs. MM/DD/YYYY). International users require a unified format.
+**Implementation**:
+- All tools accept ISO 8601 strings (`YYYY-MM-DDTHH:MM:SSZ`) for date parameters.
+- Tool outputs include a `_date` or similar field with the raw ISO 8601 string.
+- A shared utility `src/strava_mcp_server/utils.py` handles parsing and formatting.
+- **Human Readability**: While raw data is ISO 8601, markdown summaries presented to the user should use `DD.MM.YYYY HH:MM` for comfort, but the raw data for agent analysis must be standardized.
+
+## 2. Authentication & Token Management
+**Decision**: Automate token rotation and prioritize environment-based configuration.
+**Context**: Strava tokens expire every 6 hours. Manual refresh is tedious for automated use.
+**Implementation**:
+- The server checks token expiration before every request.
+- Tokens are automatically refreshed and updated in the environment/memory.
+- Initial authentication is handled via a separate `auth` script or integrated OAuth flow.
+
+## 3. Data Representation & MCP Annotations
+**Decision**: Use dual-content outputs with audience-specific annotations and native MIME typing.
+**Context**: To provide a clean user experience while giving the LLM detailed data, we split tool results into two parts and use protocol-level typing.
+**Implementation**:
+- **User Facing**: Markdown summaries annotated with `audience=["user"]` using `TextContent`.
+- **Assistant Facing**: Raw JSON data provided as an `EmbeddedResource` with `mimeType="application/json"` and annotated with `audience=["assistant"]`.
+- This ensures the LLM explicitly knows the data format while allowing clients to optimize the user-facing UI.
+
+## 4. Internationalization
+**Decision**: Use metric units (meters, km, m/s) internally and provide clear conversion instructions to the LLM.
+**Implementation**:
+- Strava API returns metric units. 
+- The LLM is instructed in `main.py` to convert these to human-friendly formats (km, km/h) based on user preference.

pyproject.toml

@@ -40,11 +40,20 @@ Repository = "https://git.hnrx.net/hnrx/strava-mcp-server"
 [project.scripts]
 strava-mcp = "strava_mcp_server.main:main"
 strava-mcp-get-token = "strava_mcp_server.get_token:main"
+server = "strava_mcp_server.main:main"
+auth = "strava_mcp_server.get_token:main"
 
 [dependency-groups]
 dev = [
     "ruff>=0.15.12",
+    "pytest>=8.0",
+    "pytest-asyncio>=0.24",
+    "pytest-sugar>=1.1.1",
 ]
 
 [tool.hatch.version]
 source = "vcs"
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]

scripts/hooks/pre-commit

@@ -0,0 +1,35 @@
+#!/bin/sh
+# pre-commit hook: runs ruff check (lint) and ruff format --check on staged Python files
+# To bypass: git commit --no-verify
+
+STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep '\.py$')
+
+if [ -z "$STAGED_FILES" ]; then
+    exit 0
+fi
+
+FAILED=0
+
+echo "🔍 Running ruff check (lint)..."
+uv run ruff check $STAGED_FILES
+if [ $? -ne 0 ]; then
+    echo "   ↳ Fix with: uv run ruff check --fix"
+    FAILED=1
+fi
+
+echo "🎨 Running ruff format --check..."
+uv run ruff format --check $STAGED_FILES
+if [ $? -ne 0 ]; then
+    echo "   ↳ Fix with: uv run ruff format"
+    FAILED=1
+fi
+
+if [ $FAILED -ne 0 ]; then
+    echo ""
+    echo "❌ Pre-commit checks failed. Commit aborted."
+    echo "   To bypass: git commit --no-verify"
+    exit 1
+fi
+
+echo "✅ All checks passed."
+exit 0

scripts/hooks/pre-push

@@ -0,0 +1,18 @@
+#!/bin/sh
+# pre-push hook: runs unit tests before every git push
+# To bypass: git push --no-verify
+
+echo "🧪 Running unit tests..."
+
+uv run pytest tests/unit/ -q
+exit_code=$?
+
+if [ $exit_code -ne 0 ]; then
+    echo ""
+    echo "❌ Unit tests failed. Push aborted."
+    echo "   To bypass: git push --no-verify"
+    exit 1
+fi
+
+echo "✅ All unit tests passed."
+exit 0

src/strava_mcp_server/__init__.py

@@ -1,2 +1,3 @@
 """Strava MCP Server"""
+
 __version__ = "0.1.0"

src/strava_mcp_server/get_token.py

@@ -11,6 +11,7 @@ Required scopes:
 
 Usage: uv run get_token.py
 """
+
 import os
 import webbrowser
 import httpx
@@ -25,33 +26,98 @@ CLIENT_SECRET = os.getenv("STRAVA_CLIENT_SECRET")
 REDIRECT_URI = "http://localhost:8765/callback"
 SCOPES = "profile:read_all,activity:read_all,activity:read,profile:write"
 
-# Global to capture the auth code from the callback
-auth_code: str | None = None
-
 
 class CallbackHandler(BaseHTTPRequestHandler):
+    client_id: str = ""
+    client_secret: str = ""
+    tokens: dict = {}
+    error: str | None = None
+
     def do_GET(self):
-        global auth_code
         parsed = urlparse(self.path)
         params = parse_qs(parsed.query)
 
         if "code" in params:
-            auth_code = params["code"][0]
+            code = params["code"][0]
+            try:
+                # Exchange code for token synchronously
+                response = httpx.post(
+                    "https://www.strava.com/oauth/token",
+                    data={
+                        "client_id": self.client_id,
+                        "client_secret": self.client_secret,
+                        "code": code,
+                        "grant_type": "authorization_code",
+                    },
+                )
+                response.raise_for_status()
+                self.tokens = response.json()
+
                 self.send_response(200)
-            self.send_header("Content-Type", "text/html")
+                self.send_header("Content-Type", "text/html; charset=utf-8")
                 self.end_headers()
-            self.wfile.write(b"""
+
-                <html><body style="font-family:sans-serif;text-align:center;padding:40px">
+                refresh_token = self.tokens.get("refresh_token")
-                <h2>&#x2705; Authorization successful!</h2>
+
-                <p>You can close this window and return to your terminal.</p>
+                self.wfile.write(
-                </body></html>
+                    f"""
-            """)
+                    <html>
+                    <head>
+                        <style>
+                            body {{ font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.6; color: #333; max-width: 800px; margin: 40px auto; padding: 20px; text-align: left; }}
+                            .card {{ background: #f4f7f6; border-radius: 8px; padding: 20px; border-left: 5px solid #fc4c02; margin-top: 20px; }}
+                            pre {{ background: #222; color: #fff; padding: 15px; border-radius: 5px; overflow-x: auto; font-family: "SF Mono", Monaco, Consolas, monospace; font-size: 13px; }}
+                            .success-header {{ text-align: center; margin-bottom: 40px; }}
+                            .success-icon {{ color: #2ecc71; font-size: 48px; display: block; margin-bottom: 10px; }}
+                            h2, h3 {{ color: #fc4c02; }}
+                            .env-label {{ font-weight: bold; color: #666; font-size: 12px; text-transform: uppercase; margin-bottom: 5px; display: block; }}
+                            .copy-hint {{ font-size: 12px; color: #666; font-style: italic; }}
+                            code {{ background: #eee; padding: 2px 4px; border-radius: 4px; }}
+                        </style>
+                    </head>
+                    <body>
+                        <div class="success-header">
+                            <span class="success-icon">&#x2705;</span>
+                            <h2>Authorization successful!</h2>
+                            <p>You have successfully authenticated with Strava. You can now close this window.</p>
+                        </div>
+                        
+                        <h3>1. Local Setup (.env)</h3>
+                        <p>Copy the following block into your <code>.env</code> file in the project root:</p>
+                        <div class="card">
+                            <span class="env-label">Your .env content:</span>
+                            <pre>STRAVA_CLIENT_ID={self.client_id}
+STRAVA_CLIENT_SECRET={self.client_secret}
+STRAVA_REFRESH_TOKEN={refresh_token}</pre>
+                        </div>
+
+                        <h3>2. Kubernetes Setup (Secret)</h3>
+                        <p>If you are deploying this server to Kubernetes, run the following command to create the required Secret:</p>
+                        <div class="card">
+                            <span class="env-label">Kubectl Command:</span>
+                            <pre>kubectl create secret generic strava-mcp-server-secret \\
+  --from-literal=STRAVA_CLIENT_ID={self.client_id} \\
+  --from-literal=STRAVA_CLIENT_SECRET={self.client_secret} \\
+  --from-literal=STRAVA_REFRESH_TOKEN={refresh_token}</pre>
+                        </div>
+
+                        <p style="margin-top: 40px; font-size: 14px; color: #666; text-align: center;">
+                            &mdash; Strava MCP Server Authorization Helper &mdash;
+                        </p>
+                    </body>
+                    </html>
+                """.encode("utf-8")
+                )
+            except Exception as e:
+                self.error = str(e)
+                self.send_response(500)
+                self.end_headers()
+                self.wfile.write(f"Error exchanging token: {e}".encode())
         else:
-            error = params.get("error", ["unknown"])[0]
+            error_msg = params.get("error", ["unknown"])[0]
             self.send_response(400)
-            self.send_header("Content-Type", "text/html")
             self.end_headers()
-            self.wfile.write(f"<html><body><h2>&#x274C; Error: {error}</h2></body></html>".encode())
+            self.wfile.write(f"Error: {error_msg}".encode())
 
     def log_message(self, format, *args):
         pass  # Suppress server logs
@@ -71,6 +137,12 @@ def main():
         f"&scope={SCOPES}"
     )
 
+    # Configure handler
+    CallbackHandler.client_id = CLIENT_ID
+    CallbackHandler.client_secret = CLIENT_SECRET
+    CallbackHandler.tokens = {}
+    CallbackHandler.error = None
+
     print("=" * 60)
     print("  Strava OAuth2 Authorization")
     print("=" * 60)
@@ -85,26 +157,15 @@ def main():
     server = HTTPServer(("localhost", 8765), CallbackHandler)
     server.handle_request()  # Handle exactly one request (the callback)
 
-    if not auth_code:
+    if CallbackHandler.error:
-        print("❌ No authorization code received.")
+        print(f"❌ Token exchange failed: {CallbackHandler.error}")
         return
 
-    print("\nExchanging authorization code for tokens...")
+    if not CallbackHandler.tokens:
-    response = httpx.post(
+        print("❌ No tokens received.")
-        "https://www.strava.com/oauth/token",
-        data={
-            "client_id": CLIENT_ID,
-            "client_secret": CLIENT_SECRET,
-            "code": auth_code,
-            "grant_type": "authorization_code",
-        },
-    )
-
-    if response.status_code != 200:
-        print(f"❌ Token exchange failed: {response.status_code} {response.text}")
         return
 
-    data = response.json()
+    data = CallbackHandler.tokens
     refresh_token = data["refresh_token"]
     athlete = data.get("athlete", {})
 
@@ -120,6 +181,26 @@ def main():
     print(f"STRAVA_REFRESH_TOKEN={refresh_token}")
     print("-" * 40)
 
+    # Optional: Automatically update .env if it exists
+    try:
+        env_path = ".env"
+        if os.path.exists(env_path):
+            with open(env_path, "r") as f:
+                lines = f.readlines()
+            with open(env_path, "w") as f:
+                found = False
+                for line in lines:
+                    if line.startswith("STRAVA_REFRESH_TOKEN="):
+                        f.write(f"STRAVA_REFRESH_TOKEN={refresh_token}\n")
+                        found = True
+                    else:
+                        f.write(line)
+                if not found:
+                    f.write(f"\nSTRAVA_REFRESH_TOKEN={refresh_token}\n")
+            print("Successfully updated your .env file!")
+    except Exception as e:
+        print(f"Could not automatically update .env: {e}")
+
 
 if __name__ == "__main__":
     main()

src/strava_mcp_server/main.py

@@ -26,8 +26,10 @@ def validate_credentials() -> None:
         sys.exit(1)
 
     if not os.getenv("STRAVA_REFRESH_TOKEN"):
-        print("ℹ️ No STRAVA_REFRESH_TOKEN found. Server starting in unauthenticated mode.")
+        print(
-        print("   Use the 'get_new_oauth_token' tool via MCP to authenticate.")
+            "ℹ️ No STRAVA_REFRESH_TOKEN found. Server starting in unauthenticated mode."
+        )
+        print("   Run 'uv run auth' on your local machine to authenticate.")
 
 
 def main() -> None:
@@ -42,7 +44,13 @@ def main() -> None:
 
     mcp = FastMCP(
         "Strava MCP Server",
-        instructions="Dates returned by this server are generally in ISO-8601 (UTC) or formatted as DD.MM.YYYY HH:MM. Always present dates, times, and durations to the user in a natural, human-readable format appropriate for their language.",
+        instructions="""
+        IMPORTANT ON DATE/TIME: 
+        - Always use ISO 8601 (UTC) for date/time inputs (YYYY-MM-DDTHH:MM:SSZ).
+        - This server returns dates in ISO 8601 (UTC).
+        - When presenting to the user, you may format dates naturally in their local language, but use the raw ISO data for all internal logic and tool calls.
+        - Distance is in meters (convert to km for users), elevation in meters, and speed in m/s (convert to km/h or pace).
+        """.strip(),
         host=host,
         port=port,
         streamable_http_path="/mcp",
@@ -56,12 +64,20 @@ def main() -> None:
 
     register_tools(mcp, strava)
 
+    # Check transport mode from environment (Default to stdio for local dev)
+    transport = os.getenv("MCP_TRANSPORT", "stdio")
+
+    if transport == "http":
+        # Run in Streamable HTTP mode (standard for Docker, K8s and OpenWebUI)
         print(f"🚀 Starting Strava MCP Server on http://{host}:{port}")
         print(f"   MCP endpoint: http://{host}:{port}/mcp  (Streamable HTTP)")
         try:
             mcp.run(transport="streamable-http")
         except KeyboardInterrupt:
             pass
+    else:
+        # Run in STDIO mode (default for local testing and Claude Desktop)
+        mcp.run(transport="stdio")
 
 
 if __name__ == "__main__":

src/strava_mcp_server/strava_client.py

@@ -37,7 +37,9 @@ class StravaClient:
     async def get_valid_token(self) -> str:
         """Returns a valid access token, refreshing it if necessary."""
         if not self.refresh_token:
-            raise ValueError("No Strava refresh token found. Please run the 'get_new_oauth_token' MCP tool to authenticate first.")
+            raise ValueError(
+                "No Strava refresh token found. Please run 'uv run auth' on your local machine to authenticate first."
+            )
 
         if not self.access_token or time.time() > self.expires_at - 60:
             await self._refresh_access_token()
@@ -99,15 +101,27 @@ class StravaClient:
         """Gets the heart rate and power zones for a specific activity."""
         return await self._get(f"activities/{activity_id}/zones")
 
-    async def get_activity_comments(self, activity_id: int, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_activity_comments(
+        self, activity_id: int, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets comments on a specific activity."""
-        return await self._get(f"activities/{activity_id}/comments", params={"page": page, "per_page": per_page})
+        return await self._get(
+            f"activities/{activity_id}/comments",
+            params={"page": page, "per_page": per_page},
+        )
 
-    async def get_activity_kudoers(self, activity_id: int, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_activity_kudoers(
+        self, activity_id: int, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets athletes who kudoed a specific activity."""
-        return await self._get(f"activities/{activity_id}/kudos", params={"page": page, "per_page": per_page})
+        return await self._get(
+            f"activities/{activity_id}/kudos",
+            params={"page": page, "per_page": per_page},
+        )
 
-    async def get_activity_streams(self, activity_id: int, keys: List[str]) -> Dict[str, Any]:
+    async def get_activity_streams(
+        self, activity_id: int, keys: List[str]
+    ) -> Dict[str, Any]:
         """Gets data streams for a specific activity."""
         return await self._get(
             f"activities/{activity_id}/streams",
@@ -116,28 +130,45 @@ class StravaClient:
 
     # ── Clubs ─────────────────────────────────────────────────────────────────
 
-    async def get_athlete_clubs(self, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_athlete_clubs(
+        self, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets clubs the current athlete belongs to."""
-        return await self._get("athlete/clubs", params={"page": page, "per_page": per_page})
+        return await self._get(
+            "athlete/clubs", params={"page": page, "per_page": per_page}
+        )
 
     async def get_club(self, club_id: int) -> Dict[str, Any]:
         """Gets a specific club by ID."""
         return await self._get(f"clubs/{club_id}")
 
-    async def get_club_activities(self, club_id: int, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_club_activities(
+        self, club_id: int, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets recent activities from a club."""
-        return await self._get(f"clubs/{club_id}/activities", params={"page": page, "per_page": per_page})
+        return await self._get(
+            f"clubs/{club_id}/activities", params={"page": page, "per_page": per_page}
+        )
 
-    async def get_club_members(self, club_id: int, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_club_members(
+        self, club_id: int, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets members of a club."""
-        return await self._get(f"clubs/{club_id}/members", params={"page": page, "per_page": per_page})
+        return await self._get(
+            f"clubs/{club_id}/members", params={"page": page, "per_page": per_page}
+        )
 
     # ── Routes ────────────────────────────────────────────────────────────────
 
-    async def get_routes_by_athlete(self, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_routes_by_athlete(
+        self, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets routes created by the current athlete."""
         athlete = await self.get_athlete()
-        return await self._get(f"athletes/{athlete['id']}/routes", params={"page": page, "per_page": per_page})
+        return await self._get(
+            f"athletes/{athlete['id']}/routes",
+            params={"page": page, "per_page": per_page},
+        )
 
     async def get_route_by_id(self, route_id: str) -> Dict[str, Any]:
         """Gets a specific route by its ID."""
@@ -153,19 +184,26 @@ class StravaClient:
         """Gets a specific segment by ID."""
         return await self._get(f"segments/{segment_id}")
 
-    async def get_starred_segments(self, page: int = 1, per_page: int = 30) -> List[Dict[str, Any]]:
+    async def get_starred_segments(
+        self, page: int = 1, per_page: int = 30
+    ) -> List[Dict[str, Any]]:
         """Gets segments starred by the current athlete."""
-        return await self._get("segments/starred", params={"page": page, "per_page": per_page})
+        return await self._get(
+            "segments/starred", params={"page": page, "per_page": per_page}
+        )
 
-    async def explore_segments(self, bounds: str, activity_type: str = "riding") -> Dict[str, Any]:
+    async def explore_segments(
+        self, bounds: str, activity_type: str = "riding"
+    ) -> Dict[str, Any]:
         """Explores segments within a given bounding box."""
         return await self._get(
             "segments/explore",
             params={"bounds": bounds, "activity_type": activity_type},
         )
 
-
+    async def get_segment_streams(
-    async def get_segment_streams(self, segment_id: int, keys: List[str]) -> Dict[str, Any]:
+        self, segment_id: int, keys: List[str]
+    ) -> Dict[str, Any]:
         """Gets data streams for a specific segment."""
         return await self._get(
             f"segments/{segment_id}/streams",
@@ -193,7 +231,9 @@ class StravaClient:
             params["end_date_local"] = end_date_local
         return await self._get("segment_efforts", params=params)
 
-    async def get_segment_effort_streams(self, effort_id: str, keys: List[str]) -> Dict[str, Any]:
+    async def get_segment_effort_streams(
+        self, effort_id: str, keys: List[str]
+    ) -> Dict[str, Any]:
         """Gets data streams for a specific segment effort."""
         return await self._get(
             f"segment_efforts/{effort_id}/streams",

src/strava_mcp_server/tools/__init__.py

@@ -3,6 +3,7 @@ MCP Tool definitions for the Strava MCP Server.
 
 Register all tools by calling register_tools(mcp, strava).
 """
+
 from mcp.server.fastmcp import FastMCP
 from strava_mcp_server.strava_client import StravaClient
 
@@ -14,7 +15,7 @@ from . import segments
 from . import segment_efforts
 from . import gear
 from . import prompts
-from . import auth
+
 
 def register_tools(mcp: FastMCP, strava: StravaClient) -> None:
     """Register all available tools and prompts."""
@@ -26,4 +27,3 @@ def register_tools(mcp: FastMCP, strava: StravaClient) -> None:
     segment_efforts.register(mcp, strava)
     gear.register(mcp, strava)
     prompts.register(mcp, strava)
-    auth.register(mcp, strava)

src/strava_mcp_server/tools/activities.py

@@ -1,7 +1,33 @@
 import json
 from mcp.server.fastmcp import FastMCP, Context
-from mcp.types import TextContent
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
+from strava_mcp_server.utils import (
+    parse_iso_to_unix,
+    format_date_iso,
+    format_date_human,
+)
+
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    """Helper: return an assistant-facing EmbeddedResource with application/json."""
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri,
+            mimeType="application/json",
+            text=json.dumps(data, indent=2),
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    """Helper: return a user-facing TextContent."""
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
 
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
@@ -9,16 +35,15 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         ctx: Context,
         limit: int = 10,
         page: int = 1,
-        before: int | None = None,
+        before: str | None = None,
-        after: int | None = None,
+        after: str | None = None,
-    ) -> list[TextContent]:
+    ):
         """
         List recent Strava activities for the authenticated user.
         :param limit: Number of activities to return per page (default 10, max 200).
         :param page: Page number for pagination (default 1).
-        :param before: Unix timestamp — only return activities before this time.
+        :param before: ISO 8601 date string (e.g., '2024-05-01T00:00:00Z') — only return activities before this time.
-        :param after: Unix timestamp — only return activities after this time.
+        :param after: ISO 8601 date string (e.g., '2024-04-01T00:00:00Z') — only return activities after this time.
-                      Example: 1704067200 = 2024-01-01 00:00:00 UTC.
         """
         try:
             await ctx.info(f"Fetching activities (Page {page}, Limit {limit})...")
@@ -26,50 +51,51 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
             activities = await strava.list_activities(
                 limit=min(limit, 200),
                 page=page,
-                before=before,
+                before=parse_iso_to_unix(before),
-                after=after,
+                after=parse_iso_to_unix(after),
             )
 
-            from datetime import datetime
-            def format_date(d_str):
-                if not d_str: 
-                    return "N/A"
-                try:
-                    d = datetime.fromisoformat(d_str.replace('Z', '+00:00'))
-                    return f"{d.day:02d}.{d.month:02d}.{d.year} {d.hour:02d}:{d.minute:02d}"
-                except Exception:
-                    return d_str
-
             essential_data = []
             for a in activities:
-                essential_data.append({
+                start_date_raw = a.get("start_date")
+                essential_data.append(
+                    {
                         "id": a["id"],
                         "name": a["name"],
                         "sport_type": a.get("sport_type") or a.get("type"),
-                    "start_date": format_date(a.get("start_date")),
+                        "start_date": format_date_iso(start_date_raw),
+                        "start_date_local": format_date_human(start_date_raw),
                         "distance": f"{a.get('distance', 0) / 1000:.2f} km",
                         "moving_time": f"{a.get('moving_time', 0) / 60:.1f} min",
                         "total_elevation_gain": f"{a.get('total_elevation_gain', 0):.0f} m",
                         "average_heartrate": a.get("average_heartrate"),
                         "gear_id": a.get("gear_id"),
-                })
+                    }
+                )
 
             if not essential_data:
-                markdown_summary = "### 📭 Keine Aktivitäten in diesem Zeitraum gefunden."
+                markdown_summary = (
+                    "### 📭 Keine Aktivitäten in diesem Zeitraum gefunden."
+                )
             else:
                 markdown_summary = f"### 🚴 Aktivitäten (Seite {page})\n"
-                markdown_summary += "| Datum | Sport | Name | Distanz | Zeit | Höhenmeter | Ø HR |\n"
+                markdown_summary += (
-                markdown_summary += "|-------|-------|------|---------|------|------------|------|\n"
+                    "| Datum | Sport | Name | Distanz | Zeit | Höhenmeter | Ø HR |\n"
+                )
+                markdown_summary += (
+                    "|-------|-------|------|---------|------|------------|------|\n"
+                )
                 for a in essential_data:
-                    hr = f"{a['average_heartrate']:.0f} bpm" if a['average_heartrate'] else "-"
+                    hr = (
-                    markdown_summary += f"| {a['start_date']} | {a['sport_type']} | {a['name']} | {a['distance']} | {a['moving_time']} | {a['total_elevation_gain']} | {hr} |\n"
+                        f"{a['average_heartrate']:.0f} bpm"
+                        if a["average_heartrate"]
+                        else "-"
+                    )
+                    markdown_summary += f"| {a['start_date_local']} | {a['sport_type']} | {a['name']} | {a['distance']} | {a['moving_time']} | {a['total_elevation_gain']} | {hr} |\n"
 
             return [
-                TextContent(type="text", text=markdown_summary.strip()),
+                _user_text(markdown_summary.strip()),
-                TextContent(
+                _resource("internal://activities/list", essential_data),
-                    type="text", 
-                    text=f"Raw Data for Analysis: {json.dumps(essential_data, indent=2)}"
-                )
             ]
         except Exception as e:
             error_msg = f"Error listing activities: {str(e)}"
@@ -94,9 +120,61 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                         segment["id"] = str(segment["id"])
             if "id" in activity:
                 activity["id"] = str(activity["id"])
-            return activity
+
+            name = activity.get("name", "N/A")
+            sport = activity.get("sport_type") or activity.get("type", "N/A")
+            date = format_date_human(activity.get("start_date"))
+            dist = f"{activity.get('distance', 0) / 1000:.2f} km"
+            time = f"{activity.get('moving_time', 0) / 60:.1f} min"
+            elev = f"{activity.get('total_elevation_gain', 0):.0f} m"
+            avg_hr = (
+                f"{activity.get('average_heartrate', 0):.0f} bpm"
+                if activity.get("average_heartrate")
+                else "N/A"
+            )
+            max_hr = (
+                f"{activity.get('max_heartrate', 0):.0f} bpm"
+                if activity.get("max_heartrate")
+                else "N/A"
+            )
+            avg_spd = (
+                f"{activity.get('average_speed', 0) * 3.6:.1f} km/h"
+                if activity.get("average_speed")
+                else "N/A"
+            )
+            avg_w = (
+                f"{activity.get('average_watts', 0):.0f} W"
+                if activity.get("average_watts")
+                else "N/A"
+            )
+            gear = activity.get("gear_id") or "N/A"
+            n_efforts = len(activity.get("segment_efforts", []))
+
+            markdown_summary = f"""### 🏃 Aktivität: {name}
+| Feld | Wert |
+|------|------|
+| Sport | {sport} |
+| Datum | {date} |
+| Distanz | {dist} |
+| Zeit | {time} |
+| Höhenmeter | {elev} |
+| Ø Herzfrequenz | {avg_hr} |
+| Max Herzfrequenz | {max_hr} |
+| Ø Geschwindigkeit | {avg_spd} |
+| Ø Leistung | {avg_w} |
+| Ausrüstung | {gear} |
+| Segment-Efforts | {n_efforts} |"""
+
+            return [
+                _user_text(markdown_summary.strip()),
+                _resource(f"internal://activities/{activity_id}", activity),
+            ]
         except Exception as e:
-            return f"Error fetching activity details: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching activity details: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def get_activity_comments(activity_id: int, limit: int = 30):
@@ -107,17 +185,27 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             comments = await strava.get_activity_comments(activity_id, per_page=limit)
-            return [
+            data = [
                 {
                     "id": c.get("id"),
                     "text": c.get("text"),
                     "athlete": f"{c.get('athlete', {}).get('firstname')} {c.get('athlete', {}).get('lastname')}",
-                    "created_at": c.get("created_at"),
+                    "created_at": format_date_iso(c.get("created_at")),
                 }
                 for c in comments
             ]
+            if not data:
+                md = "### 💬 Keine Kommentare vorhanden."
+            else:
+                md = f"### 💬 Kommentare ({len(data)})\n"
+                for c in data:
+                    md += f"- **{c['athlete']}** ({format_date_human(c['created_at'])}): {c['text']}\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://activities/{activity_id}/comments", data),
+            ]
         except Exception as e:
-            return f"Error fetching comments: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching comments: {str(e)}")]
 
     @mcp.tool()
     async def get_activity_kudoers(activity_id: int, limit: int = 30):
@@ -128,7 +216,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             kudoers = await strava.get_activity_kudoers(activity_id, per_page=limit)
-            return [
+            data = [
                 {
                     "id": k.get("id"),
                     "name": f"{k.get('firstname')} {k.get('lastname')}",
@@ -137,8 +225,20 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for k in kudoers
             ]
+            if not data:
+                md = "### 👍 Noch keine Kudos."
+            else:
+                md = f"### 👍 Kudos ({len(data)})\n"
+                md += "| Name | Ort |\n|------|-----|\n"
+                for k in data:
+                    loc = ", ".join(filter(None, [k["city"], k["country"]])) or "N/A"
+                    md += f"| {k['name']} | {loc} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://activities/{activity_id}/kudoers", data),
+            ]
         except Exception as e:
-            return f"Error fetching kudoers: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching kudoers: {str(e)}")]
 
     @mcp.tool()
     async def get_laps_by_activity_id(activity_id: int):
@@ -149,7 +249,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             laps = await strava.get_activity_laps(activity_id)
-            return [
+            data = [
                 {
                     "lap_index": lap.get("lap_index"),
                     "name": lap.get("name"),
@@ -164,8 +264,25 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for lap in laps
             ]
+            if not data:
+                md = "### 🔄 Keine Runden gefunden."
+            else:
+                md = f"### 🔄 Runden ({len(data)})\n"
+                md += "| # | Distanz | Zeit | Ø Speed | Ø HR |\n"
+                md += "|---|---------|------|---------|------|\n"
+                for lap in data:
+                    hr = (
+                        f"{lap['average_heartrate']:.0f} bpm"
+                        if lap["average_heartrate"]
+                        else "-"
+                    )
+                    md += f"| {lap['lap_index']} | {lap['distance']} | {lap['moving_time']} | {lap['average_speed']} | {hr} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://activities/{activity_id}/laps", data),
+            ]
         except Exception as e:
-            return f"Error fetching laps: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching laps: {str(e)}")]
 
     @mcp.tool()
     async def get_zones_by_activity_id(activity_id: int):
@@ -176,7 +293,8 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             zones = await strava.get_activity_zones(activity_id)
-            result = []
+            data = []
+            md = "### 💓 Zonen-Verteilung\n\n"
             for zone in zones:
                 buckets = [
                     {
@@ -187,17 +305,35 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                     }
                     for i, b in enumerate(zone.get("distribution_buckets", []))
                 ]
-                result.append({
+                zone_data = {
                     "type": zone.get("type", "unknown"),
                     "sensor_based": zone.get("sensor_based", False),
                     "score": zone.get("score"),
                     "custom_zones": zone.get("custom_zones", False),
                     "points": zone.get("points"),
                     "distribution_buckets": buckets,
-                })
+                }
-            return result
+                data.append(zone_data)
+                label = (
+                    "Herzfrequenz"
+                    if zone_data["type"] == "heartrate"
+                    else "Leistung (Power)"
+                )
+                md += f"#### {label}\n| Zone | Bereich | Zeit |\n|------|---------|------|\n"
+                for b in buckets:
+                    max_val = "max" if b["max"] == -1 else str(b["max"])
+                    md += f"| {b['zone']} | {b['min']} – {max_val} | {b['time_in_zone']} |\n"
+                md += "\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://activities/{activity_id}/zones", data),
+            ]
         except Exception as e:
-            return f"Error fetching activity zones: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching activity zones: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def get_activity_streams(

src/strava_mcp_server/tools/athlete.py

@@ -1,33 +1,31 @@
 import json
 from mcp.server.fastmcp import FastMCP, Context
-from mcp.types import TextContent
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
+from strava_mcp_server.utils import format_date_iso, format_date_human
+
 
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
-    async def get_athlete_profile(ctx: Context) -> list[TextContent]:
+    async def get_athlete_profile(ctx: Context):
         """
         Get the authenticated Strava athlete's profile.
         Returns name, city, country, follower count, and other profile details.
         """
         try:
-
             await ctx.info("Fetching athlete profile...")
 
             athlete = await strava.get_athlete()
 
-            from datetime import datetime
+            location_parts = [
-            
+                p
-            def format_date(d_str):
+                for p in (
-                if not d_str: 
+                    athlete.get("city"),
-                    return "N/A"
+                    athlete.get("state"),
-                try:
+                    athlete.get("country"),
-                    d = datetime.fromisoformat(d_str.replace('Z', '+00:00'))
+                )
-                    return f"{d.day}.{d.month}.{d.year}"
+                if p
-                except Exception:
+            ]
-                    return d_str
-
-            location_parts = [p for p in (athlete.get('city'), athlete.get('state'), athlete.get('country')) if p]
             location = ", ".join(location_parts) if location_parts else "N/A"
 
             essential_data = {
@@ -40,32 +38,41 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 "measurement_units": athlete.get("measurement_preference"),
                 "is_premium": athlete.get("premium", False),
                 "profile_medium": athlete.get("profile_medium"),
-                "created_at": athlete.get("created_at"),
+                "created_at": format_date_iso(athlete.get("created_at")),
-                "updated_at": athlete.get("updated_at"),
+                "updated_at": format_date_iso(athlete.get("updated_at")),
                 "bio": athlete.get("bio"),
                 "follower_count": athlete.get("follower_count"),
                 "friend_count": athlete.get("friend_count"),
             }
 
             markdown_summary = f"""
-👤 **Profile for {essential_data['name']}** (ID: {essential_data['id']})
+👤 **Profile for {essential_data["name"]}** (ID: {essential_data["id"]})
-   - Username: {essential_data['username'] or 'N/A'}
+   - Username: {essential_data["username"] or "N/A"}
-   - Location: {essential_data['location']}
+   - Location: {essential_data["location"]}
-   - Sex: {essential_data['sex'] or 'N/A'}
+   - Sex: {essential_data["sex"] or "N/A"}
-   - Weight: {essential_data['weight'] or 'N/A'} kg
+   - Weight: {essential_data["weight"] or "N/A"} kg
-   - Measurement Units: {essential_data['measurement_units'] or 'N/A'}
+   - Measurement Units: {essential_data["measurement_units"] or "N/A"}
-   - Strava Summit Member: {'Yes' if essential_data['is_premium'] else 'No'}
+   - Strava Summit Member: {"Yes" if essential_data["is_premium"] else "No"}
-   - Profile Image (Medium): {essential_data['profile_medium'] or 'N/A'}
+   - Profile Image (Medium): {essential_data["profile_medium"] or "N/A"}
-   - Joined Strava: {format_date(essential_data['created_at'])}
+   - Joined Strava: {format_date_human(essential_data["created_at"])}
-   - Last Updated: {format_date(essential_data['updated_at'])}
+   - Last Updated: {format_date_human(essential_data["updated_at"])}
             """.strip()
 
             return [
-                TextContent(type="text", text=markdown_summary),
                 TextContent(
                     type="text",
-                    text=f"Raw Data for Analysis: {json.dumps(essential_data, indent=2)}"
+                    text=markdown_summary,
-                )
+                    annotations=Annotations(audience=["user"]),
+                ),
+                EmbeddedResource(
+                    type="resource",
+                    resource=TextResourceContents(
+                        uri="internal://athlete/profile",
+                        mimeType="application/json",
+                        text=json.dumps(essential_data, indent=2),
+                    ),
+                    annotations=Annotations(audience=["assistant"]),
+                ),
             ]
 
         except Exception as e:
@@ -74,24 +81,68 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
             return [TextContent(type="text", text=error_msg)]
 
     @mcp.tool()
-    async def get_athlete_zones():
+    async def get_athlete_zones(ctx: Context):
         """
         Get the heart rate and power zones configured for the authenticated athlete.
         Returns zone boundaries for both heart rate and power (if a power meter is configured).
         """
         try:
-            return await strava.get_athlete_zones()
+            await ctx.info("Fetching athlete zones...")
+            zones = await strava.get_athlete_zones()
+
+            markdown_summary = "### 💓 Trainingszonen\n\n"
+
+            # Heart Rate Zones
+            hr_zones = zones.get("heart_rate", {}).get("zones", [])
+            if hr_zones:
+                markdown_summary += "#### Herzfrequenz-Zonen\n"
+                markdown_summary += "| Zone | Bereich (bpm) |\n"
+                markdown_summary += "|------|---------------|\n"
+                for i, z in enumerate(hr_zones):
+                    markdown_summary += f"| {i + 1} | {z.get('min')} - {z.get('max') if z.get('max') != -1 else 'max'} |\n"
+                markdown_summary += "\n"
+
+            # Power Zones
+            power_zones = zones.get("power", {}).get("zones", [])
+            if power_zones:
+                markdown_summary += "#### Leistungs-Zonen (Power)\n"
+                markdown_summary += "| Zone | Bereich (W) |\n"
+                markdown_summary += "|------|-------------|\n"
+                for i, z in enumerate(power_zones):
+                    markdown_summary += f"| {i + 1} | {z.get('min')} - {z.get('max') if z.get('max') != -1 else 'max'} |\n"
+
+            if not hr_zones and not power_zones:
+                markdown_summary = "⚠️ Keine Trainingszonen konfiguriert."
+
+            return [
+                TextContent(
+                    type="text",
+                    text=markdown_summary.strip(),
+                    annotations=Annotations(audience=["user"]),
+                ),
+                EmbeddedResource(
+                    type="resource",
+                    resource=TextResourceContents(
+                        uri="internal://athlete/zones",
+                        mimeType="application/json",
+                        text=json.dumps(zones, indent=2),
+                    ),
+                    annotations=Annotations(audience=["assistant"]),
+                ),
+            ]
         except Exception as e:
-            return f"Error fetching athlete zones: {str(e)}"
+            error_msg = f"Error fetching athlete zones: {str(e)}"
+            await ctx.error(error_msg)
+            return [TextContent(type="text", text=error_msg)]
 
     @mcp.tool()
-    async def get_athlete_stats():
+    async def get_athlete_stats(ctx: Context):
         """
         Get cumulative training statistics for the authenticated Strava athlete.
         Includes all-time, year-to-date, and recent (4-week) totals for runs, rides, and swims.
         """
-        import json
         try:
+            await ctx.info("Fetching athlete statistics...")
             stats = await strava.get_athlete_stats()
 
             def fmt_sport(s: dict) -> dict:
@@ -102,23 +153,55 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                     "elevation_gain": f"{s.get('elevation_gain', 0):.0f} m",
                 }
 
-            result = {
+            # Prepare structured data for Markdown
-                "all_time": {
+            all_time = {
-                    "runs":  fmt_sport(stats.get("all_run_totals", {})),
+                "Laufen": fmt_sport(stats.get("all_run_totals", {})),
-                    "rides": fmt_sport(stats.get("all_ride_totals", {})),
+                "Radfahren": fmt_sport(stats.get("all_ride_totals", {})),
-                    "swims": fmt_sport(stats.get("all_swim_totals", {})),
+                "Schwimmen": fmt_sport(stats.get("all_swim_totals", {})),
-                },
-                "ytd": {
-                    "runs":  fmt_sport(stats.get("ytd_run_totals", {})),
-                    "rides": fmt_sport(stats.get("ytd_ride_totals", {})),
-                    "swims": fmt_sport(stats.get("ytd_swim_totals", {})),
-                },
-                "recent_4_weeks": {
-                    "runs":  fmt_sport(stats.get("recent_run_totals", {})),
-                    "rides": fmt_sport(stats.get("recent_ride_totals", {})),
-                    "swims": fmt_sport(stats.get("recent_swim_totals", {})),
-                },
             }
-            return json.dumps(result, indent=2)
+            ytd = {
+                "Laufen": fmt_sport(stats.get("ytd_run_totals", {})),
+                "Radfahren": fmt_sport(stats.get("ytd_ride_totals", {})),
+                "Schwimmen": fmt_sport(stats.get("ytd_swim_totals", {})),
+            }
+            recent = {
+                "Laufen": fmt_sport(stats.get("recent_run_totals", {})),
+                "Radfahren": fmt_sport(stats.get("recent_ride_totals", {})),
+                "Schwimmen": fmt_sport(stats.get("recent_swim_totals", {})),
+            }
+
+            markdown_summary = "### 📈 Trainingsstatistiken\n\n"
+
+            def create_table(title: str, data: dict):
+                tbl = f"#### {title}\n"
+                tbl += "| Sport | Aktivitäten | Distanz | Zeit | Höhenmeter |\n"
+                tbl += "|-------|-------------|---------|------|------------|\n"
+                for sport, s in data.items():
+                    if s["count"] > 0:
+                        tbl += f"| {sport} | {s['count']} | {s['distance']} | {s['moving_time']} | {s['elevation_gain']} |\n"
+                return tbl + "\n"
+
+            markdown_summary += create_table("Letzte 4 Wochen", recent)
+            markdown_summary += create_table("Dieses Jahr (YTD)", ytd)
+            markdown_summary += create_table("Gesamt", all_time)
+
+            return [
+                TextContent(
+                    type="text",
+                    text=markdown_summary.strip(),
+                    annotations=Annotations(audience=["user"]),
+                ),
+                EmbeddedResource(
+                    type="resource",
+                    resource=TextResourceContents(
+                        uri="internal://athlete/stats",
+                        mimeType="application/json",
+                        text=json.dumps(stats, indent=2),
+                    ),
+                    annotations=Annotations(audience=["assistant"]),
+                ),
+            ]
         except Exception as e:
-            return f"Error fetching athlete stats: {str(e)}"
+            error_msg = f"Error fetching athlete stats: {str(e)}"
+            await ctx.error(error_msg)
+            return [TextContent(type="text", text=error_msg)]

src/strava_mcp_server/tools/auth.py

@@ -1,121 +0,0 @@
-import os
-import webbrowser
-import httpx
-import asyncio
-from http.server import HTTPServer, BaseHTTPRequestHandler
-from urllib.parse import urlparse, parse_qs
-from mcp.server.fastmcp import FastMCP, Context
-from mcp.types import TextContent
-
-auth_code: str | None = None
-
-class CallbackHandler(BaseHTTPRequestHandler):
-    def do_GET(self):
-        global auth_code
-        parsed = urlparse(self.path)
-        params = parse_qs(parsed.query)
-
-        if "code" in params:
-            auth_code = params["code"][0]
-            self.send_response(200)
-            self.send_header("Content-Type", "text/html")
-            self.end_headers()
-            self.wfile.write(b"""
-                <html><body style="font-family:sans-serif;text-align:center;padding:40px">
-                <h2>&#x2705; Authorization successful!</h2>
-                <p>You can close this window and return to your terminal/chat.</p>
-                </body></html>
-            """)
-        else:
-            error = params.get("error", ["unknown"])[0]
-            self.send_response(400)
-            self.send_header("Content-Type", "text/html")
-            self.end_headers()
-            self.wfile.write(f"<html><body><h2>&#x274C; Error: {error}</h2></body></html>".encode())
-
-    def log_message(self, format, *args):
-        pass  # Suppress server logs
-
-def register(mcp: FastMCP, strava) -> None:
-    @mcp.tool()
-    async def get_new_oauth_token(ctx: Context) -> list[TextContent]:
-        """
-        Start the interactive Strava OAuth2 authorization flow.
-        This opens a browser window for the user to log in and authorize the app.
-        It then intercepts the redirect locally, obtains the token, and returns the tokens.
-        """
-        global auth_code
-        auth_code = None
-
-        client_id = os.getenv("STRAVA_CLIENT_ID")
-        client_secret = os.getenv("STRAVA_CLIENT_SECRET")
-        if not client_id or not client_secret:
-            return [TextContent(type="text", text="Error: Missing STRAVA_CLIENT_ID or STRAVA_CLIENT_SECRET in .env")]
-
-        redirect_uri = "http://localhost:8765/callback"
-        scopes = "profile:read_all,activity:read_all,activity:read,profile:write"
-
-        auth_url = (
-            f"https://www.strava.com/oauth/authorize"
-            f"?client_id={client_id}"
-            f"&redirect_uri={redirect_uri}"
-            f"&response_type=code"
-            f"&approval_prompt=force"
-            f"&scope={scopes}"
-        )
-
-        await ctx.info("Opening browser for Strava Authorization...")
-        webbrowser.open(auth_url)
-
-        await ctx.info("Waiting for you to log in and authorize (Browser opened on your computer)...")
-        server = HTTPServer(("localhost", 8765), CallbackHandler)
-        
-        # Run handle_request in a separate thread so it doesn't block the async event loop
-        await asyncio.to_thread(server.handle_request)
-
-        if not auth_code:
-            return [TextContent(type="text", text="Error: No authorization code received.")]
-
-        await ctx.info("Authorization code received. Exchanging for tokens...")
-        
-        async with httpx.AsyncClient() as client:
-            response = await client.post(
-                "https://www.strava.com/oauth/token",
-                data={
-                    "client_id": client_id,
-                    "client_secret": client_secret,
-                    "code": auth_code,
-                    "grant_type": "authorization_code",
-                },
-            )
-
-        if response.status_code != 200:
-            return [TextContent(type="text", text=f"Error: Token exchange failed: {response.status_code} {response.text}")]
-
-        data = response.json()
-        refresh_token = data.get("refresh_token")
-        
-        # Update the .env file if it exists
-        env_msg = ""
-        try:
-            env_path = ".env"
-            if os.path.exists(env_path):
-                with open(env_path, "r") as f:
-                    lines = f.readlines()
-                with open(env_path, "w") as f:
-                    for line in lines:
-                        if line.startswith("STRAVA_REFRESH_TOKEN="):
-                            f.write(f"STRAVA_REFRESH_TOKEN={refresh_token}\n")
-                        else:
-                            f.write(line)
-                env_msg = "\nI have also automatically updated your .env file with the new refresh token!"
-        except Exception as e:
-            env_msg = f"\nFailed to automatically update .env file: {e}"
-
-        return [TextContent(type="text", text=f"""
-✅ Authorization successful!
-You have successfully authenticated with Strava.
-
-Your new Refresh Token is: `{refresh_token}`
-{env_msg}
-""")]

src/strava_mcp_server/tools/clubs.py

@@ -1,6 +1,25 @@
+import json
 from mcp.server.fastmcp import FastMCP
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
 
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri, mimeType="application/json", text=json.dumps(data, indent=2)
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
+
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
     async def list_athlete_clubs():
@@ -10,7 +29,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             clubs = await strava.get_athlete_clubs()
-            return [
+            data = [
                 {
                     "id": c.get("id"),
                     "name": c.get("name"),
@@ -22,8 +41,18 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for c in clubs
             ]
+            if not data:
+                md = "### 🏘️ Keine Clubs gefunden."
+            else:
+                md = f"### 🏘️ Clubs ({len(data)})\n"
+                md += "| Name | Sport | Mitglieder | Ort |\n"
+                md += "|------|-------|------------|-----|\n"
+                for c in data:
+                    loc = ", ".join(filter(None, [c["city"], c["country"]])) or "N/A"
+                    md += f"| {c['name']} | {c['sport_type'] or 'N/A'} | {c['member_count']} | {loc} |\n"
+            return [_user_text(md.strip()), _resource("internal://clubs/list", data)]
         except Exception as e:
-            return f"Error fetching clubs: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching clubs: {str(e)}")]
 
     @mcp.tool()
     async def get_club(club_id: int):
@@ -45,7 +74,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             activities = await strava.get_club_activities(club_id, per_page=limit)
-            return [
+            data = [
                 {
                     "name": a.get("name"),
                     "sport_type": a.get("sport_type") or a.get("type"),
@@ -56,8 +85,24 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for a in activities
             ]
+            if not data:
+                md = "### 🚴 Keine Club-Aktivitäten gefunden."
+            else:
+                md = f"### 🚴 Club-Aktivitäten ({len(data)})\n"
+                md += "| Athlet | Sport | Name | Distanz | Zeit |\n"
+                md += "|--------|-------|------|---------|------|\n"
+                for a in data:
+                    md += f"| {a['athlete']} | {a['sport_type']} | {a['name']} | {a['distance']} | {a['moving_time']} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://clubs/{club_id}/activities", data),
+            ]
         except Exception as e:
-            return f"Error fetching club activities: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching club activities: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def get_club_members(club_id: int, limit: int = 30):
@@ -68,7 +113,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             members = await strava.get_club_members(club_id, per_page=limit)
-            return [
+            data = [
                 {
                     "id": m.get("id"),
                     "name": f"{m.get('firstname')} {m.get('lastname')}",
@@ -77,5 +122,19 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for m in members
             ]
+            if not data:
+                md = "### 👥 Keine Mitglieder gefunden."
+            else:
+                md = f"### 👥 Mitglieder ({len(data)})\n"
+                md += "| Name | Ort |\n|------|-----|\n"
+                for m in data:
+                    loc = ", ".join(filter(None, [m["city"], m["country"]])) or "N/A"
+                    md += f"| {m['name']} | {loc} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://clubs/{club_id}/members", data),
+            ]
         except Exception as e:
-            return f"Error fetching club members: {str(e)}"
+            return [
+                TextContent(type="text", text=f"Error fetching club members: {str(e)}")
+            ]

src/strava_mcp_server/tools/gear.py

@@ -1,6 +1,25 @@
+import json
 from mcp.server.fastmcp import FastMCP
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
 
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri, mimeType="application/json", text=json.dumps(data, indent=2)
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
+
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
     async def get_gear_by_id(gear_id: str):
@@ -12,7 +31,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             g = await strava.get_gear_by_id(gear_id)
-            return {
+            data = {
                 "id": g.get("id"),
                 "name": g.get("name"),
                 "nickname": g.get("nickname"),
@@ -24,5 +43,24 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 "primary": g.get("primary", False),
                 "retired": g.get("retired", False),
             }
+            brand_model = (
+                " ".join(filter(None, [data["brand_name"], data["model_name"]]))
+                or "N/A"
+            )
+            md = f"""### 🚲 Ausrüstung: {data["name"] or gear_id}
+| Feld | Wert |
+|------|------|
+| Marke / Modell | {brand_model} |
+| Spitzname | {data["nickname"] or "N/A"} |
+| Typ | {data["type"] or "N/A"} |
+| Gesamt-Distanz | {data["distance"]} |
+| Primär | {"✅ Ja" if data["primary"] else "Nein"} |
+| Im Ruhestand | {"🛑 Ja" if data["retired"] else "Nein"} |"""
+            if data["description"]:
+                md += f"\n\n_{data['description']}_"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://gear/{gear_id}", data),
+            ]
         except Exception as e:
-            return f"Error fetching gear: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching gear: {str(e)}")]

src/strava_mcp_server/tools/prompts.py

@@ -1,6 +1,7 @@
 from mcp.server.fastmcp import FastMCP
 from strava_mcp_server.strava_client import StravaClient
 
+
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.prompt()
     def analyze_activity(activity_id: str) -> str:
@@ -29,11 +30,15 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         :param weeks: Number of weeks to cover (default 4).
         Fetches recent activities and athlete stats to produce a summary report.
         """
-        import time
+        from datetime import datetime, timedelta, timezone
-        after_ts = int(time.time()) - weeks * 7 * 24 * 3600
+
+        after_dt = (datetime.now(timezone.utc) - timedelta(weeks=weeks)).replace(
+            hour=0, minute=0, second=0, microsecond=0
+        )
+        after_iso = after_dt.isoformat().replace("+00:00", "Z")
         return (
             f"Please summarize my Strava training for the last {weeks} weeks.\n\n"
-            f"Use list_activities with after={after_ts} (Unix timestamp = {weeks} weeks ago) "
+            f"Use list_activities with after='{after_iso}' (ISO 8601) "
             "and a high limit to fetch all recent activities. "
             "Also read the get_athlete_stats tool for overall totals.\n\n"
             "Structure the report as follows:\n"

src/strava_mcp_server/tools/routes.py

@@ -1,6 +1,25 @@
+import json
 from mcp.server.fastmcp import FastMCP
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
 
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri, mimeType="application/json", text=json.dumps(data, indent=2)
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
+
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
     async def get_routes_by_athlete_id(limit: int = 30):
@@ -11,12 +30,16 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             routes = await strava.get_routes_by_athlete(per_page=min(limit, 200))
-            return [
+            data = [
                 {
                     "id": str(r.get("id")),
                     "name": r.get("name"),
                     "description": r.get("description") or "",
-                    "type": "Run" if r.get("type") == 1 else "Ride" if r.get("type") == 2 else "Other",
+                    "type": "Run"
+                    if r.get("type") == 1
+                    else "Ride"
+                    if r.get("type") == 2
+                    else "Other",
                     "sub_type": r.get("sub_type"),
                     "distance": f"{r.get('distance', 0) / 1000:.2f} km",
                     "elevation_gain": f"{r.get('elevation_gain', 0):.0f} m",
@@ -26,8 +49,18 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for r in routes
             ]
+            if not data:
+                md = "### 🗺️ Keine Routen gefunden."
+            else:
+                md = f"### 🗺️ Routen ({len(data)})\n"
+                md += "| Name | Typ | Distanz | Höhenmeter | Dauer |\n"
+                md += "|------|-----|---------|------------|-------|\n"
+                for r in data:
+                    star = "⭐ " if r["starred"] else ""
+                    md += f"| {star}{r['name']} | {r['type']} | {r['distance']} | {r['elevation_gain']} | {r['estimated_moving_time']} |\n"
+            return [_user_text(md.strip()), _resource("internal://routes/list", data)]
         except Exception as e:
-            return f"Error fetching routes: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching routes: {str(e)}")]
 
     @mcp.tool()
     async def get_route_by_id(route_id: str):
@@ -38,11 +71,15 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             r = await strava.get_route_by_id(route_id)
-            return {
+            data = {
                 "id": str(r.get("id")),
                 "name": r.get("name"),
                 "description": r.get("description") or "",
-                "type": "Run" if r.get("type") == 1 else "Ride" if r.get("type") == 2 else "Other",
+                "type": "Run"
+                if r.get("type") == 1
+                else "Ride"
+                if r.get("type") == 2
+                else "Other",
                 "distance": f"{r.get('distance', 0) / 1000:.2f} km",
                 "elevation_gain": f"{r.get('elevation_gain', 0):.0f} m",
                 "estimated_moving_time": f"{r.get('estimated_moving_time', 0) / 60:.0f} min",
@@ -58,8 +95,25 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                     for s in r.get("segments", [])
                 ],
             }
+            n_seg = len(data["segments"])
+            md = f"""### 🗺️ Route: {data["name"]}
+| Feld | Wert |
+|------|------|
+| Typ | {data["type"]} |
+| Distanz | {data["distance"]} |
+| Höhenmeter | {data["elevation_gain"]} |
+| Geschätzte Dauer | {data["estimated_moving_time"]} |
+| Segmente | {n_seg} |
+| Favorit | {"⭐ Ja" if data["starred"] else "Nein"} |
+| Privat | {"🔒 Ja" if data["private"] else "Nein"} |"""
+            if data["description"]:
+                md += f"\n\n_{data['description']}_"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://routes/{route_id}", data),
+            ]
         except Exception as e:
-            return f"Error fetching route: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching route: {str(e)}")]
 
     @mcp.tool()
     async def get_route_streams(route_id: str):

src/strava_mcp_server/tools/segment_efforts.py

@@ -1,5 +1,25 @@
+import json
 from mcp.server.fastmcp import FastMCP
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
+from strava_mcp_server.utils import format_date_iso, format_date_human
+
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri, mimeType="application/json", text=json.dumps(data, indent=2)
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
 
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
@@ -12,12 +32,12 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             e = await strava.get_segment_effort(effort_id)
-            return {
+            data = {
                 "id": str(e.get("id")),
                 "name": e.get("name"),
                 "elapsed_time": f"{e.get('elapsed_time', 0) / 60:.1f} min",
                 "moving_time": f"{e.get('moving_time', 0) / 60:.1f} min",
-                "start_date": e.get("start_date"),
+                "start_date": format_date_iso(e.get("start_date")),
                 "distance": f"{e.get('distance', 0) / 1000:.2f} km",
                 "average_watts": e.get("average_watts"),
                 "average_heartrate": e.get("average_heartrate"),
@@ -25,8 +45,35 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 "pr_rank": e.get("pr_rank"),
                 "kom_rank": e.get("kom_rank"),
             }
+            pr = f"#{data['pr_rank']}" if data["pr_rank"] else "N/A"
+            kom = f"#{data['kom_rank']}" if data["kom_rank"] else "N/A"
+            w = f"{data['average_watts']:.0f} W" if data["average_watts"] else "N/A"
+            hr = (
+                f"{data['average_heartrate']:.0f} bpm"
+                if data["average_heartrate"]
+                else "N/A"
+            )
+            md = f"""### 🏅 Segment-Effort: {data["name"]}
+| Feld | Wert |
+|------|------|
+| Datum | {format_date_human(data["start_date"])} |
+| Distanz | {data["distance"]} |
+| Zeit (gesamt) | {data["elapsed_time"]} |
+| Fahrzeit | {data["moving_time"]} |
+| Ø Leistung | {w} |
+| Ø Herzfrequenz | {hr} |
+| PR-Rang | {pr} |
+| KOM-Rang | {kom} |"""
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://segment_efforts/{effort_id}", data),
+            ]
         except Exception as e:
-            return f"Error fetching segment effort: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching segment effort: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def list_segment_efforts(
@@ -49,20 +96,37 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 end_date_local=end_date_local,
                 per_page=limit,
             )
-            return [
+            data = [
                 {
                     "id": str(e.get("id")),
                     "elapsed_time": f"{e.get('elapsed_time', 0) / 60:.1f} min",
                     "moving_time": f"{e.get('moving_time', 0) / 60:.1f} min",
-                    "start_date": e.get("start_date"),
+                    "start_date": format_date_iso(e.get("start_date")),
                     "average_watts": e.get("average_watts"),
                     "average_heartrate": e.get("average_heartrate"),
                     "pr_rank": e.get("pr_rank"),
                 }
                 for e in efforts
             ]
+            if not data:
+                md = "### 🏅 Keine Efforts für dieses Segment gefunden."
+            else:
+                md = f"### 🏅 Segment-Efforts ({len(data)})\n"
+                md += "| Datum | Zeit | Fahrzeit | PR-Rang |\n"
+                md += "|-------|------|----------|--------|\n"
+                for effort in data:
+                    pr = f"#{effort['pr_rank']}" if effort["pr_rank"] else "-"
+                    md += f"| {format_date_human(effort['start_date'])} | {effort['elapsed_time']} | {effort['moving_time']} | {pr} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://segments/{segment_id}/efforts", data),
+            ]
         except Exception as e:
-            return f"Error fetching segment efforts: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching segment efforts: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def get_segment_effort_streams(

src/strava_mcp_server/tools/segments.py

@@ -1,6 +1,25 @@
+import json
 from mcp.server.fastmcp import FastMCP
+from mcp.types import TextContent, Annotations, EmbeddedResource, TextResourceContents
 from strava_mcp_server.strava_client import StravaClient
 
+
+def _resource(uri: str, data) -> EmbeddedResource:
+    return EmbeddedResource(
+        type="resource",
+        resource=TextResourceContents(
+            uri=uri, mimeType="application/json", text=json.dumps(data, indent=2)
+        ),
+        annotations=Annotations(audience=["assistant"]),
+    )
+
+
+def _user_text(text: str) -> TextContent:
+    return TextContent(
+        type="text", text=text, annotations=Annotations(audience=["user"])
+    )
+
+
 def register(mcp: FastMCP, strava: StravaClient) -> None:
     @mcp.tool()
     async def get_segment(segment_id: int):
@@ -11,7 +30,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             s = await strava.get_segment(segment_id)
-            return {
+            data = {
                 "id": s.get("id"),
                 "name": s.get("name"),
                 "activity_type": s.get("activity_type"),
@@ -28,8 +47,28 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 "city": s.get("city"),
                 "country": s.get("country"),
             }
+            loc = ", ".join(filter(None, [data["city"], data["country"]])) or "N/A"
+            md = f"""### 📍 Segment: {data["name"]}
+| Feld | Wert |
+|------|------|
+| Sport | {data["activity_type"]} |
+| Distanz | {data["distance"]} |
+| Ø Steigung | {data["average_grade"]} |
+| Max Steigung | {data["maximum_grade"]} |
+| Höhe (hoch) | {data["elevation_high"]} |
+| Höhe (tief) | {data["elevation_low"]} |
+| Höhenmeter | {data["total_elevation_gain"]} |
+| Versuche | {data["effort_count"]} |
+| Athleten | {data["athlete_count"]} |
+| KOM/QOM | {data["kom"] or "N/A"} |
+| Ort | {loc} |
+| Favorit | {"⭐ Ja" if data["starred"] else "Nein"} |"""
+            return [
+                _user_text(md.strip()),
+                _resource(f"internal://segments/{segment_id}", data),
+            ]
         except Exception as e:
-            return f"Error fetching segment: {str(e)}"
+            return [TextContent(type="text", text=f"Error fetching segment: {str(e)}")]
 
     @mcp.tool()
     async def list_starred_segments(limit: int = 30):
@@ -39,7 +78,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             segments = await strava.get_starred_segments(per_page=limit)
-            return [
+            data = [
                 {
                     "id": s.get("id"),
                     "name": s.get("name"),
@@ -51,8 +90,24 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for s in segments
             ]
+            if not data:
+                md = "### ⭐ Keine favorisierten Segmente."
+            else:
+                md = f"### ⭐ Favorisierte Segmente ({len(data)})\n"
+                md += "| Name | Sport | Distanz | Ø Steigung | Versuche |\n"
+                md += "|------|-------|---------|------------|----------|\n"
+                for s in data:
+                    md += f"| {s['name']} | {s['activity_type']} | {s['distance']} | {s['average_grade']} | {s['effort_count']} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource("internal://segments/starred", data),
+            ]
         except Exception as e:
-            return f"Error fetching starred segments: {str(e)}"
+            return [
+                TextContent(
+                    type="text", text=f"Error fetching starred segments: {str(e)}"
+                )
+            ]
 
     @mcp.tool()
     async def explore_segments(
@@ -68,7 +123,7 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
         """
         try:
             result = await strava.explore_segments(bounds, activity_type)
-            return [
+            data = [
                 {
                     "id": s.get("id"),
                     "name": s.get("name"),
@@ -79,8 +134,22 @@ def register(mcp: FastMCP, strava: StravaClient) -> None:
                 }
                 for s in result.get("segments", [])
             ]
+            if not data:
+                md = "### 🗺️ Keine Segmente in diesem Bereich gefunden."
+            else:
+                md = f"### 🗺️ Segmente in der Region ({len(data)})\n"
+                md += "| Name | Distanz | Ø Steigung | Höhendiff | Kategorie |\n"
+                md += "|------|---------|------------|-----------|----------|\n"
+                for s in data:
+                    md += f"| {s['name']} | {s['distance']} | {s['average_grade']} | {s['elevation_difference']} | {s['climb_category']} |\n"
+            return [
+                _user_text(md.strip()),
+                _resource("internal://segments/explore", data),
+            ]
         except Exception as e:
-            return f"Error exploring segments: {str(e)}"
+            return [
+                TextContent(type="text", text=f"Error exploring segments: {str(e)}")
+            ]
 
     @mcp.tool()
     async def get_segment_streams(

src/strava_mcp_server/utils.py

@@ -0,0 +1,63 @@
+from datetime import datetime, timezone
+from typing import Optional
+
+
+def parse_iso_to_unix(iso_str: Optional[str]) -> Optional[int]:
+    """
+    Parses an ISO 8601 string into a Unix timestamp.
+    Accepts formats like '2024-01-01', '2024-01-01T12:00:00Z', etc.
+    """
+    if not iso_str:
+        return None
+    try:
+        # Remove 'Z' and replace with +00:00 for fromisoformat compatibility if needed
+        # but fromisoformat in Python 3.11+ handles Z correctly.
+        # For older versions or varied formats, we use a slightly more robust approach.
+        clean_iso = iso_str.replace("Z", "+00:00")
+        dt = datetime.fromisoformat(clean_iso)
+        # Ensure it has a timezone; default to UTC if missing
+        if dt.tzinfo is None:
+            dt = dt.replace(tzinfo=timezone.utc)
+        return int(dt.timestamp())
+    except Exception:
+        return None
+
+
+def format_date_iso(date_input: Optional[str | datetime]) -> str:
+    """
+    Standardizes a date string or datetime object to ISO 8601 (UTC).
+    """
+    if not date_input:
+        return "N/A"
+
+    try:
+        if isinstance(date_input, str):
+            # Strava dates are often '2024-01-01T12:00:00Z'
+            dt = datetime.fromisoformat(date_input.replace("Z", "+00:00"))
+        else:
+            dt = date_input
+
+        if dt.tzinfo is None:
+            dt = dt.replace(tzinfo=timezone.utc)
+
+        return dt.isoformat().replace("+00:00", "Z")
+    except Exception:
+        return str(date_input)
+
+
+def format_date_human(date_input: Optional[str | datetime]) -> str:
+    """
+    Returns a human-readable date/time string (DD.MM.YYYY HH:MM).
+    """
+    if not date_input:
+        return "N/A"
+
+    try:
+        if isinstance(date_input, str):
+            dt = datetime.fromisoformat(date_input.replace("Z", "+00:00"))
+        else:
+            dt = date_input
+
+        return dt.strftime("%d.%m.%Y %H:%M")
+    except Exception:
+        return str(date_input)

tests/test_strava.py

@@ -3,6 +3,7 @@ import os
 from strava_client import StravaClient
 from dotenv import load_dotenv
 
+
 async def test_connection():
     load_dotenv()
 
@@ -12,7 +13,9 @@ async def test_connection():
 
     if not all([client_id, client_secret, refresh_token]):
         print("❌ Error: Missing Strava credentials in .env file.")
-        print("Please ensure STRAVA_CLIENT_ID, STRAVA_CLIENT_SECRET, and STRAVA_REFRESH_TOKEN are set.")
+        print(
+            "Please ensure STRAVA_CLIENT_ID, STRAVA_CLIENT_SECRET, and STRAVA_REFRESH_TOKEN are set."
+        )
         return
 
     client = StravaClient()
@@ -20,7 +23,9 @@ async def test_connection():
     print("Testing Strava connection...")
     try:
         athlete = await client.get_athlete()
-        print(f"✅ Success! Connected as {athlete.get('firstname')} {athlete.get('lastname')}")
+        print(
+            f"✅ Success! Connected as {athlete.get('firstname')} {athlete.get('lastname')}"
+        )
         print(f"Athlete ID: {athlete.get('id')}")
 
         print("\nFetching recent activities...")
@@ -32,8 +37,11 @@ async def test_connection():
     except Exception as e:
         print(f"❌ Connection failed: {str(e)}")
         if "401" in str(e):
-            print("Hint: This is likely a scope issue. Your token needs 'activity:read' permission.")
+            print(
+                "Hint: This is likely a scope issue. Your token needs 'activity:read' permission."
+            )
             print("Run: uv run get_token.py  to re-authorize with the correct scopes.")
 
+
 if __name__ == "__main__":
     asyncio.run(test_connection())

tests/unit/__init__.py

@@ -0,0 +1 @@
+# This file marks the tests/unit directory as a Python package.

tests/unit/test_mcp_helpers.py

@@ -0,0 +1,63 @@
+"""Unit tests for MCP content block helper functions."""
+
+import json
+
+from mcp.types import TextContent, EmbeddedResource
+
+# Import helpers directly from a tool module to test them
+from strava_mcp_server.tools.activities import _resource, _user_text
+
+
+class TestUserTextHelper:
+    def test_returns_text_content(self):
+        result = _user_text("Hello World")
+        assert isinstance(result, TextContent)
+
+    def test_type_is_text(self):
+        result = _user_text("Hello")
+        assert result.type == "text"
+
+    def test_text_value(self):
+        result = _user_text("Test message")
+        assert result.text == "Test message"
+
+    def test_audience_is_user(self):
+        result = _user_text("Hello")
+        assert result.annotations is not None
+        assert result.annotations.audience == ["user"]
+
+
+class TestResourceHelper:
+    def test_returns_embedded_resource(self):
+        result = _resource("internal://test/data", {"key": "value"})
+        assert isinstance(result, EmbeddedResource)
+
+    def test_type_is_resource(self):
+        result = _resource("internal://test/data", {"key": "value"})
+        assert result.type == "resource"
+
+    def test_mime_type_is_json(self):
+        result = _resource("internal://test/data", {"key": "value"})
+        assert result.resource.mimeType == "application/json"
+
+    def test_uri_is_set(self):
+        result = _resource("internal://athlete/profile", {"id": 1})
+        assert str(result.resource.uri) == "internal://athlete/profile"
+
+    def test_text_is_valid_json(self):
+        data = {"id": 42, "name": "Test Athlete", "active": True}
+        result = _resource("internal://test", data)
+        parsed = json.loads(result.resource.text)
+        assert parsed == data
+
+    def test_audience_is_assistant(self):
+        result = _resource("internal://test", {})
+        assert result.annotations is not None
+        assert result.annotations.audience == ["assistant"]
+
+    def test_list_data(self):
+        data = [{"id": 1}, {"id": 2}]
+        result = _resource("internal://activities/list", data)
+        parsed = json.loads(result.resource.text)
+        assert len(parsed) == 2
+        assert parsed[0]["id"] == 1

tests/unit/test_utils.py

@@ -0,0 +1,98 @@
+"""Unit tests for strava_mcp_server.utils — pure functions, no external dependencies."""
+
+from datetime import datetime, timezone
+
+from strava_mcp_server.utils import (
+    parse_iso_to_unix,
+    format_date_iso,
+    format_date_human,
+)
+
+
+class TestParseIsoToUnix:
+    def test_full_iso_with_z(self):
+        result = parse_iso_to_unix("2024-01-15T12:00:00Z")
+        assert result == int(
+            datetime(2024, 1, 15, 12, 0, 0, tzinfo=timezone.utc).timestamp()
+        )
+
+    def test_full_iso_with_offset(self):
+        result = parse_iso_to_unix("2024-01-15T13:00:00+01:00")
+        assert result == int(
+            datetime(2024, 1, 15, 12, 0, 0, tzinfo=timezone.utc).timestamp()
+        )
+
+    def test_date_only(self):
+        result = parse_iso_to_unix("2024-06-01")
+        assert result == int(
+            datetime(2024, 6, 1, 0, 0, 0, tzinfo=timezone.utc).timestamp()
+        )
+
+    def test_none_returns_none(self):
+        assert parse_iso_to_unix(None) is None
+
+    def test_empty_string_returns_none(self):
+        assert parse_iso_to_unix("") is None
+
+    def test_invalid_string_returns_none(self):
+        assert parse_iso_to_unix("not-a-date") is None
+
+    def test_returns_int(self):
+        result = parse_iso_to_unix("2024-01-01T00:00:00Z")
+        assert isinstance(result, int)
+
+
+class TestFormatDateIso:
+    def test_z_suffix_normalized(self):
+        result = format_date_iso("2024-01-15T12:00:00Z")
+        assert result == "2024-01-15T12:00:00Z"
+
+    def test_offset_preserved(self):
+        # format_date_iso preserves timezone offset info; normalization to UTC
+        # is the caller's responsibility if needed.
+        result = format_date_iso("2024-01-15T13:00:00+01:00")
+        assert result == "2024-01-15T13:00:00+01:00"
+
+    def test_datetime_object(self):
+        dt = datetime(2024, 3, 10, 8, 30, 0, tzinfo=timezone.utc)
+        result = format_date_iso(dt)
+        assert result == "2024-03-10T08:30:00Z"
+
+    def test_none_returns_na(self):
+        assert format_date_iso(None) == "N/A"
+
+    def test_empty_string_returns_na(self):
+        assert format_date_iso("") == "N/A"
+
+    def test_invalid_string_returned_as_is(self):
+        result = format_date_iso("not-a-date")
+        assert result == "not-a-date"
+
+
+class TestFormatDateHuman:
+    def test_iso_with_z(self):
+        result = format_date_human("2024-01-15T08:30:00Z")
+        assert result == "15.01.2024 08:30"
+
+    def test_iso_with_offset(self):
+        # +01:00 → displayed in local time of the datetime (13:00 in +01 = 13:00 displayed)
+        result = format_date_human("2024-01-15T13:45:00+01:00")
+        assert result == "15.01.2024 13:45"
+
+    def test_datetime_object(self):
+        dt = datetime(2024, 12, 31, 23, 59, tzinfo=timezone.utc)
+        result = format_date_human(dt)
+        assert result == "31.12.2024 23:59"
+
+    def test_none_returns_na(self):
+        assert format_date_human(None) == "N/A"
+
+    def test_empty_string_returns_na(self):
+        assert format_date_human("") == "N/A"
+
+    def test_format_pattern(self):
+        result = format_date_human("2024-06-01T00:00:00Z")
+        # Ensure it matches DD.MM.YYYY HH:MM
+        import re
+
+        assert re.match(r"\d{2}\.\d{2}\.\d{4} \d{2}:\d{2}", result)

uv.lock

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+[[package]]
+name = "backports-asyncio-runner"
+version = "1.2.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/8e/ff/70dca7d7cb1cbc0edb2c6cc0c38b65cba36cccc491eca64cabd5fe7f8670/backports_asyncio_runner-1.2.0.tar.gz", hash = "sha256:a5aa7b2b7d8f8bfcaa2b57313f70792df84e32a2a746f585213373f900b42162", size = 69893, upload-time = "2025-07-02T02:27:15.685Z" }
+wheels = [
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+]
+
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 name = "certifi"
 version = "2026.4.22"
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 ]
 
+[[package]]
+name = "iniconfig"
+version = "2.3.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/72/34/14ca021ce8e5dfedc35312d08ba8bf51fdd999c576889fc2c24cb97f4f10/iniconfig-2.3.0.tar.gz", hash = "sha256:c76315c77db068650d49c5b56314774a7804df16fee4402c1f19d6d15d8c4730", size = 20503, upload-time = "2025-10-18T21:55:43.219Z" }
+wheels = [
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+]
+
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 name = "jsonschema"
 version = "4.26.0"
@@ -382,6 +400,24 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b3/38/89ba8ad64ae25be8de66a6d463314cf1eb366222074cfda9ee839c56a4b4/mdurl-0.1.2-py3-none-any.whl", hash = "sha256:84008a41e51615a49fc9966191ff91509e3c40b939176e643fd50a5c2196b8f8", size = 9979, upload-time = "2022-08-14T12:40:09.779Z" },
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+[[package]]
+name = "packaging"
+version = "26.2"
+source = { registry = "https://pypi.org/simple" }
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+wheels = [
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+]
+
+[[package]]
+name = "pluggy"
+version = "1.6.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f9/e2/3e91f31a7d2b083fe6ef3fa267035b518369d9511ffab804f839851d2779/pluggy-1.6.0.tar.gz", hash = "sha256:7dcc130b76258d33b90f61b658791dede3486c3e6bfb003ee5c9bfb396dd22f3", size = 69412, upload-time = "2025-05-15T12:30:07.975Z" }
+wheels = [
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+]
+
 [[package]]
 name = "pycparser"
 version = "3.0"
@@ -562,6 +598,51 @@ crypto = [
     { name = "cryptography" },
 ]
 
+[[package]]
+name = "pytest"
+version = "9.0.3"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
+    { name = "iniconfig" },
+    { name = "packaging" },
+    { name = "pluggy" },
+    { name = "pygments" },
+    { name = "tomli", marker = "python_full_version < '3.11'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/7d/0d/549bd94f1a0a402dc8cf64563a117c0f3765662e2e668477624baeec44d5/pytest-9.0.3.tar.gz", hash = "sha256:b86ada508af81d19edeb213c681b1d48246c1a91d304c6c81a427674c17eb91c", size = 1572165, upload-time = "2026-04-07T17:16:18.027Z" }
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+]
+
+[[package]]
+name = "pytest-asyncio"
+version = "1.3.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "backports-asyncio-runner", marker = "python_full_version < '3.11'" },
+    { name = "pytest" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+]
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+]
+
+[[package]]
+name = "pytest-sugar"
+version = "1.1.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pytest" },
+    { name = "termcolor" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/0b/4e/60fed105549297ba1a700e1ea7b828044842ea27d72c898990510b79b0e2/pytest-sugar-1.1.1.tar.gz", hash = "sha256:73b8b65163ebf10f9f671efab9eed3d56f20d2ca68bda83fa64740a92c08f65d", size = 16533, upload-time = "2025-08-23T12:19:35.737Z" }
+wheels = [
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+]
+
 [[package]]
 name = "python-dotenv"
 version = "1.2.2"
@@ -824,6 +905,9 @@ dependencies = [
 
 [package.dev-dependencies]
 dev = [
+    { name = "pytest" },
+    { name = "pytest-asyncio" },
+    { name = "pytest-sugar" },
     { name = "ruff" },
 ]
 
@@ -837,7 +921,75 @@ requires-dist = [
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+    { name = "pytest-asyncio", specifier = ">=0.24" },
+    { name = "pytest-sugar", specifier = ">=1.1.1" },
+    { name = "ruff", specifier = ">=0.15.12" },
+]
+
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