Truefoundry Applications

Routing note: For ambiguous user intents, use the shared clarification templates in references/intent-clarification.md.

Applications

List, inspect, and manage applications and deployments on TrueFoundry.

When to Use

List, inspect, or manage deployed applications and their deployment history. Also supports creating deployments via API manifest for pre-built images.

When NOT to Use

• User wants to deploy local code → prefer deploy skill; ask if the user wants another valid path
• User wants workspace/cluster info → prefer workspaces skill; ask if the user wants another valid path
• User wants to delete an application → guide them to the TrueFoundry UI (see "Deleting Applications" below)

Execution Priority

For simple read/list operations in this skill, always use MCP tool calls first:

• tfy_applications_list
• tfy_applications_list_deployments

If tool calls are unavailable because the MCP server is not configured, or a tool is missing, fall back automatically to direct API via tfy-api.sh.

IMPORTANT: Deleting Applications

Deletion is NOT supported via CLI, API, or any agent tool. Do NOT call any delete endpoint or attempt to delete applications programmatically.

When a user asks to delete, remove, or destroy an application, do NOT list apps for selection. Instead, immediately respond with:

To delete an application, use the TrueFoundry dashboard:

1. Open your TrueFoundry dashboard (TFY_BASE_URL in your browser)
2. Navigate to **Deployments** → select the workspace
3. Find the application you want to delete
4. Click the **three-dot menu (⋮)** on the application card → **Delete**
5. Confirm the deletion when prompted

⚠️ This action is irreversible — all pods, endpoints, and deployment history for this application will be permanently removed.

Do NOT attempt to call any delete API on behalf of the user. Do NOT list applications to ask which one to delete. Simply provide the UI instructions above.

List Applications

When using direct API, set TFY_API_SH to the full path of this skill's scripts/tfy-api.sh. See references/tfy-api-setup.md for paths per agent.

Via Tool Call

tfy_applications_list()
tfy_applications_list(filters={"workspace_fqn": "my-cluster:my-workspace"})
tfy_applications_list(filters={"application_name": "my-app"})
tfy_applications_list(app_id="app-id-here")

Via Direct API

# Set the path to tfy-api.sh for your agent (example for Claude Code):
TFY_API_SH=~/.claude/skills/truefoundry-applications/scripts/tfy-api.sh

# List all
$TFY_API_SH GET /api/svc/v1/apps

# Filter by workspace
$TFY_API_SH GET '/api/svc/v1/apps?workspaceFqn=my-cluster:my-workspace'

# Filter by name
$TFY_API_SH GET '/api/svc/v1/apps?applicationName=my-app'

# Get by ID
$TFY_API_SH GET /api/svc/v1/apps/APP_ID

Filter Parameters

Presenting Applications

Show as a table. Use updatedAt from the API response for "Last Deployed" (ISO 8601 timestamp — format as date/time for readability). Use kind for Type and status for Status.

Applications in my-cluster:my-workspace:
| Name           | Type    | Status   | Last Deployed      |
|----------------|---------|----------|--------------------|
| tfy-tool-server | service | RUNNING  | 2026-02-10 14:30   |
| data-pipeline  | job     | STOPPED  | 2026-02-08 09:15   |

Deployment Status Monitoring

Use this to check whether a deployment has completed, is still in progress, or has failed.

Status JSON Paths

When you call GET /api/svc/v1/apps/APP_ID or GET /api/svc/v1/apps?workspaceFqn=...&applicationName=..., the response is wrapped in { data: [...] }. Each application object contains:

Status Enum Values (from API)

Transition Values

The transition field tells you what's happening right now, separate from the status:

• BUILDING — image build in progress
• DEPLOYING — pods being rolled out
• REUSING_EXISTING_BUILD — skipping build, using cached image
• COMPONENTS_DEPLOYING — multi-component app deploying
• WAITING — waiting for resources

Best practice: Use deployment.currentStatus.state.isTerminalState === true as the authoritative check for whether polling should stop. Don't rely solely on matching status strings.

Polling Pattern

TFY_API_SH=~/.claude/skills/truefoundry-applications/scripts/tfy-api.sh

# Get app status by name in workspace
bash $TFY_API_SH GET '/api/svc/v1/apps?workspaceFqn=WORKSPACE_FQN&applicationName=APP_NAME'

# Or by app ID for more detail
bash $TFY_API_SH GET '/api/svc/v1/apps/APP_ID'

Poll every 15-30 seconds until state.isTerminalState is true, then:

• If DEPLOY_SUCCESS → deployment is healthy
• If DEPLOY_FAILED, BUILD_FAILED, or FAILED → fetch logs to diagnose (use logs skill)
• If PAUSED → application was paused/stopped
• If CANCELLED → deployment was cancelled

Quick Status Check (one-liner)

# Check if deployment is done
bash $TFY_API_SH GET '/api/svc/v1/apps?workspaceFqn=WORKSPACE_FQN&applicationName=APP_NAME' | python3 -c "import sys,json; d=json.load(sys.stdin); apps=d.get('data',d) if isinstance(d,dict) else d; app=apps[0] if isinstance(apps,list) else apps; ds=app.get('deployment',{}).get('currentStatus',{}); print(f\"Status: {ds.get('status','UNKNOWN')} | Transition: {ds.get('transition','')} | Terminal: {ds.get('state',{}).get('isTerminalState','unknown')} | Display: {ds.get('state',{}).get('display','unknown')}\")"

List Deployments

Via Tool Call

tfy_applications_list_deployments(app_id="app-id")
tfy_applications_list_deployments(app_id="app-id", deployment_id="dep-id")

Via Direct API

# List deployments for an app
$TFY_API_SH GET /api/svc/v1/apps/APP_ID/deployments

# Get specific deployment
$TFY_API_SH GET /api/svc/v1/apps/APP_ID/deployments/DEPLOYMENT_ID

Sync Application

Refresh application state from the cluster. Useful when the UI or API shows stale status.

Via Tool Call

tfy_applications_sync(app_id="app-id")

Via Direct API

$TFY_API_SH POST /api/svc/v1/apps/APP_ID/sync

Promote Deployment

Promote a specific deployment to be the active deployment.

Via Tool Call

tfy_applications_promote(app_id="app-id", deployment_id="deployment-id")

Via Direct API

$TFY_API_SH POST /api/svc/v1/apps/APP_ID/deployments/DEPLOYMENT_ID/promote

Redeploy

Redeploy an application using the same configuration as an existing deployment. Useful for restarting pods or recovering from transient failures.

Via Tool Call

tfy_applications_redeploy(app_id="app-id", deployment_id="deployment-id")

Via Direct API

$TFY_API_SH POST /api/svc/v1/apps/APP_ID/deployments/DEPLOYMENT_ID/redeploy

Create Deployment (API)

For creating a deployment via API manifest (advanced — most users should use the deploy skill).

Use this section when:

• User has their own manifest/JSON and wants direct API deployment
• User explicitly requests API-based deployment instead of SDK/Python
• User wants to deploy from a pre-built image (not local code)

For deploying local code, use the deploy skill instead.

Service Manifest Structure

A basic TrueFoundry service manifest looks like this:

{
  "manifest": {
    "kind": "Service",
    "name": "my-app",
    "image": {
      "type": "image",
      "image_uri": "nginx:latest"
    },
    "ports": [
      {
        "port": 8000,
        "protocol": "TCP",
        "expose": false
      }
    ],
    "resources": {
      "cpu_request": 0.25,
      "cpu_limit": 0.5,
      "memory_request": 256,
      "memory_limit": 512
    },
    "env": {
      "APP_MODE": "production",
      "THIRD_PARTY_API_KEY": "tfy-secret://my-org:my-app-secrets:THIRD_PARTY_API_KEY"
    },
    "replicas": {
      "min": 1,
      "max": 1
    }
  },
  "workspaceId": "ws-id-here"
}

Key Fields:

• kind — "Service" for long-running services, "Job" for batch jobs
• name — Unique application name
• image.image_uri — Docker image (e.g., nginx:latest, ghcr.io/org/app:v1.0)
• ports — Array of port configs (port, protocol, expose flag)
• resources — CPU (cores) and memory (MB) requests/limits
• env — Environment variables as key-value pairs. Security: Never include raw secret values (passwords, API keys, tokens) in manifests. Use tfy-secret:// references for all sensitive environment variables. See the secrets skill.
• replicas — Min/max replica count (for autoscaling)
• workspaceId — Workspace ID (not FQN) where the app will be deployed

Before Submitting

Security: Credential Handling

• NEVER embed raw API keys, passwords, or tokens in manifest env fields.
• Always use tfy-secret:// references for sensitive environment variables.
• If the user provides a raw credential, warn them and suggest creating a TrueFoundry secret group first (use the secrets skill).
• Never ask the user to paste secret values directly into the conversation.

ALWAYS confirm with the user before creating a deployment:

1. Service name — What should the app be called?
2. Image — Full image URI (e.g., nginx:latest, ghcr.io/user/app:tag)
3. Resources — CPU request/limit (cores), memory request/limit (MB)
4. Ports — Which ports to expose, protocols (TCP/UDP), expose to internet?
5. Environment variables — Any env vars needed? (For sensitive values, only accept tfy-secret:// references — never inline credentials in manifests)
6. Replicas — How many instances? (min/max for autoscaling)
7. Workspace ID — Which workspace to deploy to?

Present this summary and ask for confirmation before making the API call.

Via Tool Call

tfy_applications_create_deployment(
    manifest={
        "kind": "Service",
        "name": "my-app",
        "image": {"type": "image", "image_uri": "nginx:latest"},
        "ports": [{"port": 8000, "protocol": "TCP", "expose": false}],
        "resources": {"cpu_request": 0.25, "cpu_limit": 0.5, "memory_request": 256, "memory_limit": 512},
        "env": {"APP_MODE": "production", "THIRD_PARTY_API_KEY": "tfy-secret://my-org:my-app-secrets:THIRD_PARTY_API_KEY"},
        "replicas": {"min": 1, "max": 1}
    },
    options={"workspace_id": "ws-id-here", "force_deploy": true}
)

Note: This requires human approval (HITL) when using tool calls.

Via Direct API

$TFY_API_SH PUT /api/svc/v1/apps '{
  "manifest": {
    "kind": "Service",
    "name": "my-app",
    "image": {"type": "image", "image_uri": "nginx:latest"},
    "ports": [{"port": 8000, "protocol": "TCP", "expose": false}],
    "resources": {"cpu_request": 0.25, "cpu_limit": 0.5, "memory_request": 256, "memory_limit": 512},
    "env": {"APP_MODE": "production", "THIRD_PARTY_API_KEY": "tfy-secret://my-org:my-app-secrets:THIRD_PARTY_API_KEY"},
    "replicas": {"min": 1, "max": 1}
  },
  "workspaceId": "ws-id-here"
}'

Common Deployment Patterns

Web service (exposed to internet with public URL):

The host must match one of the cluster's base_domains. Look up base domains first:

$TFY_API_SH GET /api/svc/v1/clusters/CLUSTER_ID
# → look for base_domains, pick the wildcard one (e.g., "*.ml.your-org.truefoundry.cloud")
# → strip "*." to get the base domain: "ml.your-org.truefoundry.cloud"
# → construct host: "{service-name}-{workspace-name}.{base_domain}"

{
  "ports": [{
    "port": 8080,
    "protocol": "TCP",
    "expose": true,
    "host": "my-app-dev-ws.ml.your-org.truefoundry.cloud",
    "app_protocol": "http"
  }],
  "replicas": {"min": 2, "max": 5}
}

If host does not match a cluster base domain, deploy will fail with: "Provided host is not configured in cluster".

Internal service (not exposed):

{
  "ports": [{"port": 8000, "protocol": "TCP", "expose": false}],
  "replicas": {"min": 1, "max": 1}
}

Resource-intensive service:

{
  "resources": {
    "cpu_request": 1.0,
    "cpu_limit": 2.0,
    "memory_request": 2048,
    "memory_limit": 4096
  }
}

Success Criteria

• The user can see the status of their deployed applications in a clear, formatted table
• Unhealthy or stopped deployments are identified with actionable next steps (check logs, redeploy)
• The agent has filtered results by the correct workspace when the user specified one
• The user can find a specific application by name, ID, or workspace
• Deployment details (replicas, resources, image, ports) are surfaced when the user asks for more info

Composability

• After listing apps: Use logs skill to check logs, deploy skill to redeploy
• After deploy: Use this skill to verify the deployment succeeded
• Check jobs: Use jobs skill for job-specific run details
• Find workspace first: Use workspaces skill to get workspace FQN for filtering

Error Handling

No Applications Found

No applications found. Check:
- Workspace FQN is correct
- You have apps deployed in this workspace
- Your API key has access to this workspace

Application Not Found

Application ID not found. List apps first to find the correct ID.

Permission Denied

Cannot access this application. Check your API key permissions.