Twill Cloud Coding Agent

Twill Cloud Coding Agent

Use this skill to run Twill workflows through the public v1 API.

Setup

Set API key and optional base URL:

export TWILL_API_KEY="your_api_key"export TWILL_BASE_URL="${TWILL_BASE_URL:-https://twill.ai}"

All API calls use:

Authorization: Bearer $TWILL_API_KEY

Use this helper to reduce repetition:

api() {  curl -sS "$@" -H "Authorization: Bearer $TWILL_API_KEY" -H "Content-Type: application/json"}

API keys belong to a cloud workspace and only reach its cloud tasks. Keys from a personal workspace are rejected, and local project chats (Twill Desktop) are not visible through the API: they return 404 or are omitted from lists.

Errors are JSON { "error": { "code", "message", "details"? } }. Rate limits are 100 requests/minute and 1,000/hour per key; a 429 includes Retry-After.

Endpoint Coverage (Public v1)

• GET /api/v1/auth/me
• GET /api/v1/repositories
• POST /api/v1/tasks
• GET /api/v1/tasks
• GET /api/v1/tasks/:taskIdOrSlug
• POST /api/v1/tasks/:taskIdOrSlug/messages
• GET /api/v1/tasks/:taskIdOrSlug/jobs
• POST /api/v1/tasks/:taskIdOrSlug/cancel
• POST /api/v1/tasks/:taskIdOrSlug/archive
• GET /api/v1/tasks/:taskIdOrSlug/teleport/claude
• GET /api/v1/jobs/:jobId/logs/stream
• POST /api/v1/jobs/:jobId/cancel
• GET /api/v1/scheduled-tasks
• POST /api/v1/scheduled-tasks
• GET /api/v1/scheduled-tasks/:scheduledTaskId
• PATCH /api/v1/scheduled-tasks/:scheduledTaskId
• DELETE /api/v1/scheduled-tasks/:scheduledTaskId
• POST /api/v1/scheduled-tasks/:scheduledTaskId/pause
• POST /api/v1/scheduled-tasks/:scheduledTaskId/resume

There is no plan-approval endpoint. Plans and native permission questions are answered in the Twill task chat.

Auth and Discovery

Validate key and workspace context:

curl -sS "$TWILL_BASE_URL/api/v1/auth/me" -H "Authorization: Bearer $TWILL_API_KEY"

Returns workspaceId, userId, apiKeyId, workspaceName, workspaceSlug.

List available GitHub repositories for the workspace:

curl -sS "$TWILL_BASE_URL/api/v1/repositories" -H "Authorization: Bearer $TWILL_API_KEY"

Returns { repositories: [{ fullName, defaultBranch, description }] }.

Tasks

Create Task

api -X POST "$TWILL_BASE_URL/api/v1/tasks" -d '{"command":"Fix flaky tests in CI"}'

Repository and branch are not accepted in the request body. The agent picks from the workspace's connected repos at run time.

Required fields:

• command

Optional fields:

• agent: a complete provider/model id, for example claude-code/sonnet, claude-code/opus, codex/gpt-5.5, open-code/openai/gpt-5.4. Provider-only values such as codex are rejected. Omit it to use the workspace's routing defaults.
• userIntent (SWE, DEV_ENVIRONMENT, SCHEDULE): defaults to SWE. Legacy PLAN, ASK and GOAL are still accepted but run as SWE.
• reasoningEffort (low, medium, high, xhigh, max, ultra)
• parentId (id of an existing task to spawn this one from)
• title
• files (array of { filename, mediaType, url }, where url must be a data: URL such as data:text/plain;base64,...; remote http(s): URLs are rejected)

To have the agent plan first, start command with /plan. The user reviews and approves the plan in the Twill task chat.

Response (201) is { task: { id, slug, title, url }, job: { id, status } }. Always report task.url back to the user.

List Tasks

curl -sS "$TWILL_BASE_URL/api/v1/tasks?limit=20&cursor=BASE64_CURSOR" -H "Authorization: Bearer $TWILL_API_KEY"

Supports cursor pagination via limit (default 20, max 100) and cursor. Response is { tasks, nextCursor }; each task includes id, slug, title, url, createdAt, latestJobStatus, and prs (array of { repoFullName, prNumber, prUrl, title, state }, where state is open, merged or closed).

Get Task Details

curl -sS "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG" -H "Authorization: Bearer $TWILL_API_KEY"

Returns task (id, slug, title, url, createdAt, updatedAt, prs) and latestJob (id, status, type, agentProvider, startedAt, completedAt, plan, planOutcome, finalAnswer), or latestJob: null.

Send Follow-Up Message

api -X POST "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG/messages" -d '{"message":"Please prioritize login flow first"}'

Sending a message cancels any in-flight job for the task and starts a fresh run with this message. The response is { job: { id, status } }.

Optional fields: userIntent, reasoningEffort, files (same rules as create), and agent. agent may change the model but not the harness: switching from claude-code/... to codex/... returns 400. Start a new task to use another harness.

List Task Jobs

curl -sS "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG/jobs?limit=30&cursor=BASE64_CURSOR" -H "Authorization: Bearer $TWILL_API_KEY"

Supports cursor pagination:

• limit defaults to 30 (max 100)
• cursor fetches older pages
• response is { jobs, nextCursor }; each job has id, status, type, agentProvider, finalAnswer, plan, planOutcome, error, createdAt, completedAt

Cancel Task

api -X POST "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG/cancel" -d '{}'

Archive Task

api -X POST "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG/archive" -d '{}'

Export Claude Teleport Session

curl -sS "$TWILL_BASE_URL/api/v1/tasks/TASK_ID_OR_SLUG/teleport/claude" -H "Authorization: Bearer $TWILL_API_KEY" -o session.tar

Returns a tar of the task's Claude Code session JSONL files (headers X-Twill-Session-Id, X-Twill-Job-Id, X-Twill-File-Count). Only works for Claude Code tasks while the task sandbox is still alive; otherwise it returns 400, 404 or 409.

Jobs

Stream Job Logs (SSE)

curl -N "$TWILL_BASE_URL/api/v1/jobs/JOB_ID/logs/stream" -H "Authorization: Bearer $TWILL_API_KEY" -H "Accept: text/event-stream"

Each data: line is a JSON object with a type:

• connected: first event.
• Finished jobs: trace_url (url, expiresAt), a short-lived signed URL to download the full trace, then historical_complete and complete (status: completed, failed or cancelled).
• Running jobs: trace_chunks (signed chunk URLs) and trace_records for history, then historical_complete, then live log and status events until complete.
• error: the stream failed.

To get a job's result without parsing the trace, prefer finalAnswer from Get Task Details or List Task Jobs.

Cancel Job

api -X POST "$TWILL_BASE_URL/api/v1/jobs/JOB_ID/cancel" -d '{}'

Scheduled Tasks

Creating scheduled tasks requires a paid plan (Pro or Max); otherwise the API returns 403.

List and Create

curl -sS "$TWILL_BASE_URL/api/v1/scheduled-tasks" -H "Authorization: Bearer $TWILL_API_KEY"
api -X POST "$TWILL_BASE_URL/api/v1/scheduled-tasks" -d '{  "title":"Daily triage",  "message":"Review urgent issues and open tasks",  "cronExpression":"0 9 * * 1-5",  "timezone":"America/New_York",  "agentProviderId":"claude-code/sonnet"}'

Required: title (max 200 chars), message, cronExpression.

Optional: timezone (IANA name, defaults to "UTC"), agentProviderId (complete provider/model override, e.g. claude-code/sonnet, codex/gpt-5.5). The server does not validate agentProviderId when saving, so an invalid id only fails when the schedule runs.

Repository and branch are not part of the scheduled-task payload. Each run picks repos at dispatch time, like one-shot tasks.

Response is { scheduledTask: { id, workspaceId, createdById, title, message, cronExpression, timezone, nextRunAt, lastRunAt, enabled, agentProviderId, createdAt, updatedAt } }.

Read, Update, Delete

curl -sS "$TWILL_BASE_URL/api/v1/scheduled-tasks/SCHEDULED_TASK_ID" -H "Authorization: Bearer $TWILL_API_KEY"
api -X PATCH "$TWILL_BASE_URL/api/v1/scheduled-tasks/SCHEDULED_TASK_ID" -d '{  "message":"Updated instructions",  "cronExpression":"0 10 * * 1-5",  "agentProviderId":"codex/gpt-5.5"}'
curl -sS -X DELETE "$TWILL_BASE_URL/api/v1/scheduled-tasks/SCHEDULED_TASK_ID" -H "Authorization: Bearer $TWILL_API_KEY"

PATCH accepts any subset of title, message, cronExpression, timezone, agentProviderId (pass null to clear the override). DELETE returns { "success": true }.

Pause and Resume

api -X POST "$TWILL_BASE_URL/api/v1/scheduled-tasks/SCHEDULED_TASK_ID/pause" -d '{}'api -X POST "$TWILL_BASE_URL/api/v1/scheduled-tasks/SCHEDULED_TASK_ID/resume" -d '{}'

Behavior

• Use userIntent SWE (default), DEV_ENVIRONMENT or SCHEDULE. For planning, prefix the command with /plan instead of sending PLAN.
• Do not send repository / branch on tasks or repositoryUrl / baseBranch on scheduled tasks. Twill picks repos and branches at run time from workspace context.
• Always pass agent / agentProviderId as a complete provider/model id.
• Inline attachments as data: URLs.
• Create the task, report task.url, and only poll or stream logs when requested.
• Plan approvals and permission questions happen in the Twill task chat. A follow-up message does not answer them.
• Ask for TWILL_API_KEY if missing.
• Do not print API keys or other secrets.