trellis-start

Prompt file imported from wsmcfr/ti_m0 (.cursor/commands/trellis-start.md). Copyright stays with the author.

Start Session

Initialize your AI development session and begin working on tasks.

Operation Types

Operations in this document are categorized as:

Initialization

Step 1: Understand Trellis Workflow [AI]

First, read the workflow guide to understand the development process:

cat .trellis/workflow.md  # Development process, conventions, and quick start guide

Step 2: Get Current Status [AI]

python3 ./.trellis/scripts/get_context.py

This returns:

• Developer identity
• Git status (branch, uncommitted changes)
• Recent commits
• Active tasks
• Journal file status

Step 3: Read Guidelines Index [AI]

python3 ./.trellis/scripts/get_context.py --mode packages

This shows available packages and their spec layers. Read the relevant spec indexes:

cat .trellis/spec/<package>/<layer>/index.md   # Package-specific guidelines
cat .trellis/spec/guides/index.md              # Thinking guides (always read)

Important: The index files are navigation — they list the actual guideline files (e.g., error-handling.md, conventions.md, mock-strategies.md). At this step, just read the indexes to understand what's available. When you start actual development, you MUST go back and read the specific guideline files relevant to your task, as listed in the index's Pre-Development Checklist.

Step 4: Check Active Tasks [AI]

python3 ./.trellis/scripts/task.py list

If continuing previous work, review the task file.

Step 5: Report Ready Status and Ask for Tasks

Output a summary:

## Session Initialized

| Item | Status |
|------|--------|
| Developer | {name} |
| Branch | {branch} |
| Uncommitted | {count} file(s) |
| Journal | {file} ({lines}/2000 lines) |
| Active Tasks | {count} |

Ready for your task. What would you like to work on?

Task Classification

When user describes a task, classify it:

Decision Rule

If in doubt, use Brainstorm + Task Workflow.

Task Workflow ensures code-specs are injected to the right context, resulting in higher quality code. The overhead is minimal, but the benefit is significant.

Subtask Decomposition: If brainstorm reveals multiple independent work items, consider creating subtasks using --parent flag or add-subtask command. See /trellis:brainstorm Step 8 for details.

Question / Trivial Fix

For questions or trivial fixes, work directly:

1. Answer question or make the fix
2. If code was changed, remind user to run /trellis-finish-work

Simple Task

For simple, well-defined tasks:

1. Quick confirm: "I understand you want to [goal]. Shall I proceed?"
2. If no, clarify and confirm again
3. If yes: execute ALL steps below without stopping. Do NOT ask for additional confirmation between steps.
   • Create task directory (Phase 1 Path B, Step 2)
   • Write PRD (Step 3)
   • Research codebase (Phase 2, Step 5)
   • Configure context (Step 6)
   • Activate task (Step 7)
   • Implement (Phase 3, Step 8)
   • Check quality (Step 9)
   • Complete (Step 10)

Complex Task - Brainstorm First

For complex or vague tasks, automatically start the brainstorm process — do NOT skip directly to implementation. Use /trellis-brainstorm.

Summary:

1. Acknowledge and classify - State your understanding
2. Create task directory - Track evolving requirements in prd.md
3. Ask questions one at a time - Update PRD after each answer
4. Propose approaches - For architectural decisions
5. Confirm final requirements - Get explicit approval
6. Proceed to Task Workflow - With clear requirements in PRD

Task Workflow (Development Tasks)

Why this workflow?

• Run a dedicated research pass before coding
• Configure specs in jsonl context files
• Implement using injected context
• Verify with a separate check pass
• Result: Code that follows project conventions automatically

Overview: Two Entry Points

From Brainstorm (Complex Task):
  PRD confirmed → Research → Configure Context → Activate → Implement → Check → Complete

From Simple Task:
  Confirm → Create Task → Write PRD → Research → Configure Context → Activate → Implement → Check → Complete

Key principle: Research happens AFTER requirements are clear (PRD exists).

Phase 1: Establish Requirements

Path A: From Brainstorm (skip to Phase 2)

PRD and task directory already exist from brainstorm. Skip directly to Phase 2.

Path B: From Simple Task

Step 1: Confirm Understanding [AI]

Quick confirm:

• What is the goal?
• What type of development? (frontend / backend / fullstack)
• Any specific requirements or constraints?

If unclear, ask clarifying questions.

Step 2: Create Task Directory [AI]

TASK_DIR=$(python3 ./.trellis/scripts/task.py create "<title>" --slug <name>)

Step 3: Write PRD [AI]

Create prd.md in the task directory with:

# <Task Title>

## Goal
<What we're trying to achieve>

## Requirements
- <Requirement 1>
- <Requirement 2>

## Acceptance Criteria
- [ ] <Criterion 1>
- [ ] <Criterion 2>

## Technical Notes
<Any technical decisions or constraints>

Phase 2: Prepare for Implementation (shared)

Both paths converge here. PRD and task directory must exist before proceeding.

Step 4: Code-Spec Depth Check [AI]

If the task touches infra or cross-layer contracts, do not start implementation until code-spec depth is defined.

Trigger this requirement when the change includes any of:

• New or changed command/API signatures
• Database schema or migration changes
• Infra integrations (storage, queue, cache, secrets, env contracts)
• Cross-layer payload transformations

Must-have before proceeding:

• Target code-spec files to update are identified
• Concrete contract is defined (signature, fields, env keys)
• Validation and error matrix is defined
• At least one Good/Base/Bad case is defined

Step 5: Research the Codebase [AI]

Based on the confirmed PRD, run a focused research pass and produce:

1. Relevant spec files in .trellis/spec/
2. Existing code patterns to follow (2-3 examples)
3. Files that will likely need modification

Use this output format:

## Relevant Specs
- <path>: <why it's relevant>

## Code Patterns Found
- <pattern>: <example file path>

## Files to Modify
- <path>: <what change>

Step 6: Configure Context [AI]

Initialize default context:

python3 ./.trellis/scripts/task.py init-context "$TASK_DIR" <type>
# type: backend | frontend | fullstack

Add specs found in your research pass:

# For each relevant spec and code pattern:
python3 ./.trellis/scripts/task.py add-context "$TASK_DIR" implement "<path>" "<reason>"
python3 ./.trellis/scripts/task.py add-context "$TASK_DIR" check "<path>" "<reason>"

Step 7: Activate Task [AI]

python3 ./.trellis/scripts/task.py start "$TASK_DIR"

This sets .current-task so hooks can inject context.

Phase 3: Execute (shared)

Step 8: Implement [AI]

Implement the task described in prd.md.

• Follow all specs injected into implement context
• Keep changes scoped to requirements
• Run lint and typecheck before finishing

Step 9: Check Quality [AI]

Run a quality pass against check context:

• Review all code changes against the specs
• Fix issues directly
• Ensure lint and typecheck pass

Step 10: Complete [AI]

1. Verify lint and typecheck pass
2. Report what was implemented
3. Remind user to:
   • Test the changes
   • Commit when ready
   • Run /trellis-record-session to record this session

User Available Commands [USER]

The following slash commands are for users (not AI):

AI Executed Scripts [AI]

Platform Detection

Trellis auto-detects your platform based on config directories. For Cursor users, ensure detection works correctly:

If auto-detection fails, set manually:

export TRELLIS_PLATFORM=cursor

Or prefix commands:

TRELLIS_PLATFORM=cursor python3 ./.trellis/scripts/task.py list

Session End Reminder

IMPORTANT: When a task or session is completed, remind the user:

Before ending this session, please run /trellis-record-session to record what we accomplished.