go

name	go
description	Resume execution from wherever you left off. Detects current state and runs the appropriate next command, or reports what's blocking progress. Use at the start of any session to pick up where you left off.
argument-hint	[--codex] [--no-codex]
allowed-tools	Read, Write, Edit, Glob, Grep, Bash, Skill, AskUserQuestion

Determine where execution stands and either continue or report blockers.

Arguments

Argument	Required	Description
--codex	No	Switch to Codex execution mode (persists to settings)
--no-codex	No	Switch to default execution mode (persists to settings)

Execution Mode Toggle

If --codex or --no-codex is passed, update executionMode in .claude/settings.local.json before any other logic:

• --codex → write "executionMode": "codex"
• --no-codex → write "executionMode": "default"

The flag is forwarded to any /phase-start invocation downstream. When neither flag is passed, the current setting is used as-is.

Workflow

Copy this checklist and track progress:

Go Progress:
- [ ] Detect context (greenfield plan vs feature directory)
- [ ] Check for execution plan
- [ ] Read phase state
- [ ] Determine next action
- [ ] Execute or report blockers

Context Detection

Determine working context:

1. If current working directory matches pattern */features/*:

   • PROJECT_ROOT = parent of parent of CWD (e.g., /project/features/foo → /project)
   • FEATURE_DIR = CWD
   • MODE = "feature"

2. If current working directory matches pattern */plans/greenfield*:

   • PROJECT_ROOT = parent of parent of CWD (e.g., /project/plans/greenfield → /project)
   • MODE = "greenfield"

3. Otherwise:

   • PROJECT_ROOT = current working directory
   • MODE = "greenfield-legacy"

Step 1: Check for Execution Plan

Check if EXECUTION_PLAN.md exists in the current working directory (or FEATURE_DIR if feature mode).

If no EXECUTION_PLAN.md:

Check if this is the toolkit repo (e.g., .toolkit-marker exists in CWD):

NO EXECUTION PLAN
=================

You're in the toolkit repo, not a project directory.

To start a new project:
  1. /generate-plan <project-path>    (greenfield project)
  2. cd <project-path>
  3. /go

To add a feature to an existing project:
  1. /feature-plan <feature-name>     (from the project directory)
  2. cd features/<feature-name>
  3. /go

If NOT in the toolkit repo:

NO EXECUTION PLAN
=================

No EXECUTION_PLAN.md found in this directory.

If this project uses the scoped greenfield layout and `plans/greenfield/EXECUTION_PLAN.md`
exists here, run:
  cd plans/greenfield
  /go

Options:
  - If you have specs ready: Run /generate-plan from the toolkit repo
  - If this is a feature: cd features/<name> and try again
  - If you need specs first: Run /product-spec then /technical-spec

Stop here if no execution plan found.

Step 2: Read Phase State

Read .claude/phase-state.json from PROJECT_ROOT (or FEATURE_DIR if feature mode).

Also read EXECUTION_PLAN.md to determine total phase count and current checkbox state.

Parse Phase Count

Count the number of ## Phase N: headers in EXECUTION_PLAN.md to determine TOTAL_PHASES.

Parse State

If phase-state.json exists and is valid JSON with a main key:

• CURRENT_PHASE = main.current_phase
• PHASE_STATUS = status of the current phase from main.phases[]
• Check for in-progress tasks, blocked tasks, and failure counts

If phase-state.json does not exist or is invalid:

• STATE_EXISTS = false

Step 3: Determine Next Action

Walk through these conditions in order. Take the FIRST match:

Case A: No Phase State — First Run

Condition: phase-state.json doesn't exist or is invalid.

Action: Invoke /fresh-start using the Skill tool.

STARTING EXECUTION
==================
No prior state found. Running /fresh-start...

Case B: Phase In Progress — Tasks Remaining

Condition: State exists. Current phase status is IN_PROGRESS. There are tasks in EXECUTION_PLAN.md for that phase with unchecked - [ ] acceptance criteria.

Action: Read executionMode from .claude/settings.local.json. If "codex", invoke /phase-start {CURRENT_PHASE} --codex. Otherwise invoke /phase-start {CURRENT_PHASE}. Phase-start handles resumption — it skips already-completed tasks.

RESUMING EXECUTION
==================
Phase {CURRENT_PHASE} in progress. Resuming...
{If executionMode is "codex": "Mode: Codex"}
{If a specific task was IN_PROGRESS in state: "Continuing from Task {id}"}

Case C: Phase Tasks Complete — Needs Checkpoint

Condition: State exists. Current phase status is IN_PROGRESS or COMPLETE. ALL task acceptance criteria for the current phase are checked [x] in EXECUTION_PLAN.md. But phase status is NOT CHECKPOINTED.

Action: Invoke /phase-checkpoint {CURRENT_PHASE} using the Skill tool.

RUNNING CHECKPOINT
==================
All Phase {CURRENT_PHASE} tasks complete. Running quality gates...

Case D: Phase Checkpointed — More Phases Exist

Condition: State exists. Current phase status is CHECKPOINTED. CURRENT_PHASE < TOTAL_PHASES.

Action: Invoke /phase-prep {CURRENT_PHASE + 1} using the Skill tool.

ADVANCING TO NEXT PHASE
========================
Phase {CURRENT_PHASE} checkpointed. Preparing Phase {CURRENT_PHASE + 1}...

Case E: All Phases Complete

Condition: State exists. CURRENT_PHASE >= TOTAL_PHASES. Current phase status is CHECKPOINTED or COMPLETE.

Action: Check deferred review queue, then report completion.

1. Read .claude/deferred-reviews.json
2. Read autoAdvance.drainOnCompletion from .claude/settings.local.json (default: true)
3. If queue is non-empty (has reviewed: false items) AND drainOnCompletion is true:

PROJECT COMPLETE — DEFERRED REVIEW
===================================
All {TOTAL_PHASES} phases finished.

{N} items were deferred during execution.
These are non-blocking items that need human review:

Phase 1:
- [ ] "{criterion}" (Task {id})
  Context: {file}:{line} — {summary}

Phase 3:
- [ ] "{criterion}" (Task {id})
  Context: {file}:{line} — {summary}

Use AskUserQuestion:

• "All look good" → Clear queue (set all reviewed: true, remove reviewed items, update last_drained/last_drain_reason)
• "Review individually" → Invoke /review-deferred
• "Skip for now" → Keep queue, note in session

1. If queue is non-empty but drainOnCompletion is false:

EXECUTION COMPLETE
==================
All {TOTAL_PHASES} phases finished.

Note: {N} deferred review items remain in queue.
Use /review-deferred to review them when ready.

Summary:
- Phases completed: {TOTAL_PHASES}/{TOTAL_PHASES}
- Total tasks: {count from EXECUTION_PLAN.md}
- Deferred items: {N} pending review

1. If queue is empty or file doesn't exist:

EXECUTION COMPLETE
==================
All {TOTAL_PHASES} phases finished. All criteria verified. No deferred items.

Summary:
- Phases completed: {TOTAL_PHASES}/{TOTAL_PHASES}
- Total tasks: {count from EXECUTION_PLAN.md}

Consider:
- /progress              — Full completion report
- Review DEFERRED.md     — Any deferred requirements
- Review TODOS.md        — Follow-up work

Case F: Blocked

Condition: State exists. Current phase has a task with status BLOCKED, or the phase itself is BLOCKED.

Check failure tracking in phase-state.json for blocked tasks.

Also check .claude/deferred-reviews.json — if the deferred queue has items and autoAdvance.drainOnBlocker is true, present them: "While you're here, {N} deferred items are pending review."

EXECUTION BLOCKED
=================
Phase {CURRENT_PHASE} is blocked.

{For each blocked task:}
Task {id}: {task subject from EXECUTION_PLAN.md}
  Consecutive failures: {count}
  Last errors:
    - {error 1}
    - {error 2}

{If deferred queue has items:}
While you're here, {N} deferred review items are pending:
- "{criterion}" (Task {id}) — {reason}
Use /review-deferred to review them now.
{/If}

Options:
  1. Fix the issue and run /go again
  2. /phase-start {CURRENT_PHASE}     — Retry from current task
  3. Edit EXECUTION_PLAN.md           — Modify blocked criteria

Case G: Ambiguous State

Condition: None of the above cases matched (e.g., state file is partially written, phases array is empty, status is unrecognized).

Action: Offer to rebuild state.

STATE UNCLEAR
=============
phase-state.json exists but state is ambiguous.

Options:
  1. /populate-state      — Rebuild state from EXECUTION_PLAN.md + git history
  2. /fresh-start         — Start fresh (preserves git history)
  3. /progress            — Check EXECUTION_PLAN.md checkboxes directly

Use AskUserQuestion to let the user choose.

Error Handling

• If EXECUTION_PLAN.md exists but is empty → report and suggest /generate-plan
• If phase-state.json has parse errors → treat as Case A (no state) with a note about the corrupt file
• If a delegated skill fails → report the failure, don't retry automatically