The Blitz: Parallel Worktree + Agent Workflow

Parallelizes multi-issue sprints by running independent Claude agents in isolated git worktrees. Each agent creates a PR, self-reviews to 10/10 with 100% issue coverage, then PRs are sequentially merged to avoid conflicts. Herding 🐲.

⚠️ MANDATORY: 100% Issue Coverage Per Agent

Every agent MUST implement 100% of their assigned issue's requirements before their PR can be merged.

• Each agent receives COMPLETE issue requirements (extracted from GitHub issue)
• Review must verify ALL requirements are implemented
• Coverage < 100% = agent sent back to complete the work
• No PR merges until all requirements from the issue are addressed

Prerequisites

Required Tools:

• gh

  CLI (authenticated)
• Git with worktree support (2.5+)
• Claude Code with agent spawning (Task tool)

Required Skills:

• 4-step-program

  - Guides agents through fix-review-iterate-present loop

• code-reviewer

  - Self-review to 10/10 quality gate

• delphi

  - Parallel oracles for triage decisions (optional, for ambiguous triage)

Workflow Phases

Phase 1: Issue Triage

For ambiguous decisions on which issues to tackle, use the

delphi

Invoke Delphi: "Audit these open issues. For each, recommend: close (complete), fix (actionable), or defer (blocked)."

Interpreting Delphi Results:

• Unanimous agreement → Act on recommendation
• 2/3 agreement → Lean toward majority, investigate minority view
• Full divergence → Need more context; investigate manually

Close complete issues immediately:

gh issue close 1 2 3 --comment "Complete per Delphi audit"

For clear-cut issue lists, skip Delphi and proceed directly to Phase 2.

Phase 2: Worktree Setup

Create one worktree per fixable issue from main:

git worktree add .worktrees/<slug> -b fix/<slug> main

Branch Naming:

fix/<descriptive-slug>

feat/<descriptive-slug>

Example setup for 4 issues:

git worktree add .worktrees/test-isolation -b fix/test-isolation main
git worktree add .worktrees/config-theater -b fix/config-theater main
git worktree add .worktrees/wire-salience -b fix/wire-salience main
git worktree add .worktrees/testing-quality -b fix/testing-quality main

Why Worktrees:

• Complete filesystem isolation per agent
• No stash/checkout conflicts
• Agents work truly in parallel
• Each has independent node_modules, build artifacts

Phase 3: Delegate to Parallel Agents

Spawn agents using the Task tool with structured prompts. Each agent needs:

1. Working directory (absolute path to worktree)
2. Issue context (number, description, acceptance criteria)
3. COMPLETE list of ALL requirements from the issue (extracted via

   gh issue view

   )
4. Explicit instruction to use 4-step-program skill

CRITICAL: Before delegating, extract ALL requirements from each issue:

gh issue view <number>

List EVERY requirement, acceptance criterion, and edge case in the agent prompt.

Agent Prompt Template:

Working directory: /absolute/path/to/.worktrees/<slug>
Issue: #<number> - <title>

**ALL REQUIREMENTS FROM ISSUE (100% must be implemented):**
1. [Requirement 1 from issue]
2. [Requirement 2 from issue]
3. [Requirement 3 from issue]
... (list ALL of them)

Use the 4-step-program skill to:
1. Implement ALL the above requirements (100% coverage required)
2. Run tests, verify passing
3. Create PR with `gh pr create` - **MUST include `Closes #<issue-number>` in body**
4. Self-review using code-reviewer skill (which will verify 100% coverage)
5. POST review to GitHub with `gh api`

**PR MUST include:**
- `Closes #<issue-number>` to auto-close the issue on merge
- "Related Issues" section in PR body
- Verify with `gh pr view --json closingIssuesReferences`

Do not return until you achieve 10/10 review score WITH 100% of issue requirements implemented AND issue properly linked.

CRITICAL: Agents must POST reviews to GitHub, not just print them:

gh api repos/OWNER/REPO/pulls/NUMBER/reviews \
  -f body="..." -f event="COMMENT"

Launch agents in parallel using multiple Task tool calls in a single message.

Phase 4: Review Iteration Loop

Monitor each PR's review status:

gh pr view <NUMBER> --json reviews --jq '.reviews[-1].body'

TWO gates must pass for each PR:

GATE 1: 100% Issue Coverage

• Verify ALL requirements from original issue are implemented
• If ANY requirement is missing → Resume agent with missing requirements

GATE 2: 10/10 Review Quality

• Zero suggestions in review
• All verification commands pass

If coverage < 100%: Resume the agent with specific missing requirements:

PR #<NUMBER> coverage: 80% (4 of 5 requirements).
Missing requirement: [Requirement 5 from issue - specific text]
Implement this requirement and re-review.

If score < 10/10 (but coverage 100%): Resume the agent with specific feedback:

PR #<NUMBER> has 100% coverage but scored 8/10. Issues:
- <specific issue 1>
- <specific issue 2>

Fix these issues and re-review.

10/10 + 100% Coverage Criteria:

• ALL requirements from original issue implemented
• All functionality working
• Tests pass
• No obvious bugs or security issues
• Code follows project conventions
• Documentation updated if needed

Phase 4.5: FINAL COVERAGE GATE (Before Merge)

MANDATORY: Before merging ANY PR, perform LINE-BY-LINE requirement verification.

For EACH PR ready to merge:

Step 1: Extract ALL Requirements

# Get ALL checklist items from issue
gh issue view <issue-number> --json body --jq '.body' | grep -E "^\- \["

# Also get full issue for prose requirements
gh issue view <issue-number>

Step 2: Create Line-by-Line Table

MANDATORY for each PR:

## Issue #X - Full Requirements Check

| Requirement | PR Status | Evidence |
|-------------|-----------|----------|
| [exact text from issue] | ✅ | `file.cs:line` - [implementation] |
| [exact text from issue] | ❌ MISSING | Not found in PR |
| [exact text from issue] | ⚠️ PARTIAL | `file.cs:line` - [what's missing] |
| [exact text from issue] | ⚠️ MANUAL | Requires Unity Editor |

Step 3: Honest Assessment

**Honest Assessment**:
- Coverage: X% (Y of Z requirements fully implemented)
- Missing: [list specific items]
- Partial: [list items and what's missing]
- Manual: [list items needing editor/runtime]

FINAL GATE DECISION:

If Final Coverage < 100%:

Resume agent: "FINAL COVERAGE GATE FAILED for PR #<NUMBER>.

Issue #X - Full Requirements Check:

| Requirement | Status | Evidence |
|-------------|--------|----------|
| MeshDeformer component created | ✅ | MeshDeformer.cs |
| Create scene GameObject | ❌ MISSING | No scene modification |
| Cache hit rate >90% | ⚠️ MANUAL | Requires runtime profiler |

Honest Assessment:
- Coverage: 85% (11 of 13 requirements)
- Missing: scene GameObject creation
- Partial: none
- Manual: cache hit rate verification

Implement ALL items marked ❌. Items marked ⚠️ MANUAL that CAN be automated via mcp-unity MUST be automated.

Do not return until 100% coverage."

→ Loop back to Phase 4 (Review Iteration)

Phase 5: Sequential Squash-Merge + Rebase

Merge PRs one at a time. Order by dependency (infrastructure first).

Before merging, verify issue linking:

# Verify PR will close the issue
gh pr view <NUMBER> --json closingIssuesReferences --jq '.closingIssuesReferences[].number'

# If empty, PR is missing issue link - send agent back to fix!

For each PR:

# 1. Squash merge (keeps history clean) - issues auto-close on merge
gh pr merge <NUMBER> --squash --delete-branch

# 2. Update local main
git checkout main && git pull

# 3. Rebase next PR onto updated main
cd .worktrees/<next-slug>
git fetch origin main
git rebase origin/main
git push --force-with-lease

# 4. Repeat merge for next PR

Why This Order:

• Squash merge keeps main history linear
• Rebasing before merge prevents conflicts
• Sequential merging catches integration issues early

• --force-with-lease

  prevents overwriting others' work

Handling Conflicts:

git rebase origin/main
# If conflicts:
# 1. Fix conflicts in affected files
# 2. git add <fixed-files>
# 3. git rebase --continue
# 4. git push --force-with-lease

Phase 6: Cleanup

After all PRs merge:

# Remove worktrees
git worktree remove .worktrees/<slug>  # Repeat for each

# Delete local branches (remote already deleted by --delete-branch)
git branch -D fix/<slug>  # Repeat for each

# Sync main
git checkout main && git pull

# Verify clean state
git worktree list  # Should show only main
git branch         # Should show only main

Quick Reference

See

references/commands.md

references/pitfalls.md

Mermaid Diagrams in Blitz PRs

Each agent's PR SHOULD include Mermaid diagrams when the change warrants visualization.

When Agents Should Add Diagrams

flowchart

sequenceDiagram

stateDiagram-v2

flowchart

Agent Delegation Should Include

When delegating to agents, add to the prompt:

If your changes involve flow modifications, state changes, or API interactions,
include a Mermaid diagram in the PR body showing the new behavior.

Example PR with Diagram

## Summary

Fixed race condition in WebSocket reconnection.

### Before/After

```mermaid
flowchart LR
    subgraph Before
        A1[Disconnect] --> B1[Reconnect]
        B1 --> C1[Duplicate handlers]
    end
    subgraph After
        A2[Disconnect] --> B2[Cleanup handlers]
        B2 --> C2[Reconnect]
        C2 --> D2[Single handler]
    end
```

## Related Issues
- Closes #45 - WebSocket reconnection bug

Checklist Summary

1. Triage issues (use

   delphi

   if ambiguous)
2. Extract ALL requirements from each issue (

   gh issue view

   )
3. Create worktrees for each fixable issue
4. Launch parallel agents with 4-step-program including complete requirement lists
5. Monitor and iterate until all PRs hit 100% issue coverage AND 10/10
6. FINAL COVERAGE GATE: Re-verify 100% coverage before each merge
7. Sequential squash-merge with rebase between (only after gate passes)
8. Cleanup worktrees and branches
9. PRs include Mermaid diagrams where helpful