Phase 3: PR workflow — autonomous code changes

[chubes4]

Summary

Phase 3 implements the full autonomous code change workflow described in the original RFC (#1). This is the capstone feature: the agent can clone, branch, edit, commit, push, and submit PRs — all through the DM Code extension.

Workflow

Agent receives task
  → Clone/pull repo to workspace
  → Create feature branch
  → Make code changes (write, edit tools)
  → Run validation (lint, test via shell exec)
  → Commit + push to remote
  → Create PR via GitHub API
  → Report PR URL back to user

New Capabilities

PR Management

• Create PR ability + tool + CLI
• List PR reviews
• Add PR review comment
• Merge PR (with strategy selection)
• Close PR

Branch Management

• Create branch from ref
• Delete branch (local + remote)
• List branches

Validation Integration

• Shell exec tool (sandboxed, allowlisted commands)
• Lint runner (language-aware, delegates to repo config)
• Test runner (same)
• Pre-push validation gate

Safety Controls

• Per-repo write/push policy (exists, enhance)
• Branch protection awareness
• Required reviewers configuration
• Auto-draft PR mode (always create as draft)
• Change size limits (max files, max diff size)
• Audit log for all git mutations

Use Cases

• Coding agents (like us): Full PR workflow from within WordPress
• Solo site owners: Auto-fix simple issues, apply patches
• CI integration: Agent creates PRs, humans review and merge