Structure Skill (Stage 3)

This skill extracts work items from the project and structures them as Gastown Beads and Convoys.

When to Use

Use this skill when:

• Have completed Stage 1 (Discover) and optionally Stage 2 (Plan)
• Ready to create actionable work items
• Want to structure work for Gastown multi-agent execution
• Need to bundle related tasks for efficient assignment

Output Structure

project/
├── .gt/
│   ├── beads/
│   │   ├── gt-abc12.json    # Individual work items
│   │   ├── gt-def34.json
│   │   └── ...
│   └── convoys/
│       ├── convoy-001.json  # Bundled work assignments
│       └── ...
└── [existing project files]

---

Part 1: Bead Extraction

Extraction Sources (Priority Order)

Scan for work items in:

1. GitHub Issues (most authoritative)

   gh issue list --state open --json number,title,body,labels
   

2. PRD Documents

   • docs/*.md with user stories
   • docs/PRD*.md files

3. TODO Comments in Source Code

   • // TODO:, # TODO:, /* TODO */
   • // FIXME:, // HACK:, // XXX:

4. Existing Roadmap Outputs

   • scopecraft/EPICS_AND_STORIES.md (from Stage 2)
   • scopecraft/OPEN_QUESTIONS.md

5. Backlog Files

   • BACKLOG.md, TODO.md
   • docs/backlog/, docs/roadmap/

Bead Schema

Aligned with the real bd Issue schema (from github.com/steveyegge/beads):

{
  "$schema": "bead-v1",
  "id": "gt-abc12",
  "title": "Add user authentication",
  "description": "Implement OAuth2 login flow and session management",
  "design": "Use Passport.js with Google and GitHub strategies",
  "acceptance_criteria": "User can sign up with email\nUser can sign in with Google OAuth\nSession persists across page refresh",
  "notes": "See docs/PRD-auth.md for background",
  "issue_type": "feature",
  "priority": 1,
  "status": "open",
  "assignee": "",
  "labels": ["auth", "security"],
  "dependencies": [],
  "metadata": {
    "complexity": "L",
    "epic": "User Management",
    "evidence": {
      "source": "docs/PRD-auth.md",
      "line": 42,
      "extracted": "2026-01-27T10:00:00Z"
    }
  }
}

Schema notes (from real bd types):

• acceptance_criteria is a string (newline-separated), not an array
• priority is an integer: 0=critical, 1=high, 2=medium, 3=low, 4=backlog
• status is open (not pending) — real values: open | in_progress | blocked | deferred | closed
• issue_type maps directly to bd types (not type)
• complexity and evidence live in metadata (not top-level bd fields)

Issue Types

Type	Description	Source Indicators
feature	New functionality	PRDs, user stories, feature requests
bug	Defect fix	FIXME comments, bug issues
task	Generic work item	TODO comments, operational tasks
chore	Maintenance, refactoring	HACK comments, tech debt
epic	Large feature container	Feature areas, milestones
decision	Architecture decision	ADRs, design docs

Priority Values

Value	Label	Description
0	P0 / critical	Blockers, production issues
1	P1 / high	Sprint priorities
2	P2 / medium	Normal work (default)
3	P3 / low	Nice-to-have
4	P4 / backlog	Future consideration

Complexity Estimates (metadata only)

Size	Description	Typical Effort
XS	Trivial change	< 1 hour
S	Small task	1-4 hours
M	Medium task	1-2 days
L	Large task	3-5 days
XL	Epic-sized	1-2 weeks

ID Generation

Bead IDs use the rig prefix + 5-char alphanumeric. For the gastown rig the prefix is gt-:

import random
import string
def generate_bead_id():
    chars = string.ascii_lowercase + string.digits
    return f"gt-{''.join(random.choices(chars, k=5))}"

Bead Quality Requirements

Every bead must have:

• Clear, actionable title
• Substantive description (why + what)
• Acceptance criteria (as newline-separated string)
• Evidence in metadata linking to source file
• Valid complexity in metadata (XS/S/M/L/XL)
• Unique ID in gt-xxxxx format

bd CLI Integration

Lisa's .gt/beads/*.json files are a staging format. To create real bd issues:

# Option 1: Import from a markdown file Lisa generates
bd create --file=.gt/beads/bd-import.md

# Option 2: Create one at a time (for scripting)
bd create "Add user authentication" \
  --type=feature --priority=1 \
  --acceptance="User can sign up with email\nSession persists" \
  --description="Implement OAuth2 login"

# Check unblocked work
bd ready

# Claim and complete
bd update gt-abc12 --status=in_progress
bd close gt-abc12
bd sync  # commit beads changes to git

---

Part 2: Convoy Bundling

Convoy Creation Rules

Rule	Requirement
Size	3-7 beads per convoy (optimal batch)
Coherence	Related beads grouped together
Dependencies	Respect bead dependency order
Parallelization	Independent convoys can run concurrently

Bundling Strategies

1. By Epic

   • Group all beads from same epic/feature area
   • Best for feature-focused sprints

2. By Dependency Chain

   • Chain dependent beads sequentially
   • Best for complex features with prerequisites

3. By Skill

   • Group beads requiring similar expertise
   • Best for specialist assignment

4. By Size

   • Combine small beads (XS/S) together
   • Isolate large beads (L/XL)
   • Best for balanced workloads

Convoy Schema

{
  "$schema": "convoy-v1",
  "id": "convoy-001",
  "name": "Authentication Sprint",
  "description": "Implement core user authentication features",
  "beads": ["gt-abc12", "gt-def34", "gt-ghi56"],
  "assigned_to": null,
  "status": "pending",
  "created": "2026-01-27T10:00:00Z",
  "gt_convoy_cmd": "gt convoy create \"Authentication Sprint\" gt-abc12 gt-def34 gt-ghi56",
  "metadata": {
    "epic": "User Management",
    "estimated_days": 5
  }
}

The gt_convoy_cmd field is the actual gt CLI command to create this convoy in a live Gastown environment. Polecats are assigned via gt sling <bead-id> <rig>.

ID Generation

Convoy IDs: convoy- + 3-digit number

• Sequential numbering: convoy-001, convoy-002, etc.
• Pad with zeros for sorting

Convoy Quality Requirements

Every convoy must have:

• 3-7 beads (optimal batch size)
• Coherent theme (epic, skill, or dependency chain)
• All referenced beads exist in .gt/beads/
• Clear description of bundle purpose

---

Execution Procedure

Step 1: Create Directories

mkdir -p .gt/beads .gt/convoys

Step 2: Extract Beads

For each source:

1. Scan for work items
2. Extract title, description, criteria
3. Classify type and complexity
4. Generate unique ID
5. Link evidence to source
6. Write to .gt/beads/gt-xxxxx.json

Step 3: Bundle into Convoys

1. Group beads by chosen strategy
2. Ensure 3-7 beads per convoy
3. Verify all bead references exist
4. Generate convoy ID
5. Write to .gt/convoys/convoy-xxx.json

Step 4: Validate

python plugins/lisa/hooks/validate.py --stage structure

---

Quality Gates

Bead Gates

Gate	Requirement
beads_extracted	At least 1 bead created
beads_have_criteria	All beads have acceptance_criteria string
beads_have_sources	All beads have evidence.source
beads_valid_ids	All IDs match gt-[a-z0-9]{5} pattern

Convoy Gates

Gate	Requirement
convoy_created	At least 1 convoy created
convoy_size_valid	All convoys have 3-7 beads
convoy_beads_exist	All referenced bead IDs exist in .gt/beads/

---

Integration with Gastown

Lisa's .gt/beads/ and .gt/convoys/ are staging directories. The real Gastown toolchain uses:

• bd — the beads CLI (issue tracking, Dolt-backed SQL database in .beads/)
• bv — the graph analysis CLI (read-only, use bv --robot-triage not bare bv)
• gt — the Gastown workspace manager (convoys, polecats, rigs, worktrees)

Live Integration Workflow

# 1. Create real bd issues from Lisa's staging beads
#    Either run individual bd create commands, or produce a markdown file:
bd create --file=.gt/beads/bd-import.md

# 2. Create a convoy in Gastown from the bead IDs
gt convoy create "Authentication Sprint" gt-abc12 gt-def34 gt-ghi56

# 3. Sling work to polecats (ephemeral workers) or crew
gt sling gt-abc12 <rig>           # assign to a polecat on the rig
gt convoy status hq-cv-abc        # track convoy progress

# 4. Workers pick up and complete
bd ready                          # see unblocked work
bd update gt-abc12 --status=in_progress
bd close gt-abc12
bd sync                           # commit beads changes to git

Real Bead Status Values

open → in_progress → closed
         ↓
       blocked
       deferred

The Propulsion Principle

Gastown agents follow: "If you find something on your hook, YOU RUN IT." When a bead is slotted to a polecat, it executes immediately — no confirmation needed. Lisa's quality gates and acceptance criteria are what make that safe to do.

---

Templates

See templates/ directory for JSON templates:

• templates/bead.json - Bead template
• templates/convoy.json - Convoy template