Auto-detect phase, guide process.
Phases
0. Worktree (automatic, silent if already isolated)
Feature branch? Skip. On main/master/develop? Spawn worktree before code. [ETHOS: Worktree Isolation]
scripts/mux-worktree.sh <type>/<branch-name>
Claude invoke silent when phase 1 start on default branch. User never run.
1. Understand
- Explore | clarify one-at-a-time | new->2-3 approaches+tradeoffs | bug->failing test->root cause
- Spawn background agents: alternatives, prior art, edge cases parallel
- Mixed patterns area? Refactor to single pattern FIRST before add features
- GATE: no impl code until approach approved.
2. Plan
- Every step: exact file paths, exact code, expected output. No placeholders.
- Bite-sized tasks (2-5 min each)
- UI work: spawn 2-3 parallel prototype agents, review with user, pick best. See REFERENCE.md.
- 5+ tasks -> stacked PRs (one per logical group)
- Complex plan (5+ tasks, multi-stakeholder)? Consider
/ultraplan /codex:rescueavailable -> auto-dispatch second opinion
2b. Grill
GATE: no impl until plan survive grilling.
- Auto-invoke
/domain-model| grill until every branch resolved | update CONTEXT.md + ADRs inline - Update plan with changes | get explicit user confirmation
- Skip only if: trivial bug fix AND <3 tasks AND no architectural decisions
3. Implement (TDD)
- RED: failing test first | GREEN: minimal code to pass
- Test deletion guard: verify test+assertion count not decrease after GREEN. AI may weaken tests -> reject and redo.
- REFACTOR while green | no
setTimeouthacks | run--detectAsyncLeaks
4-6. Ship -- /go
Impl done -> run /go to ship. Handle all:
- 4. Verify -- types + lint + tests + browser smoke
- 4b. Review / Refine -- self-reviewer + adversarial-reviewer agents (4b->5)
- 5. Ship --
/simplify->/commit-push-pr-> code-reviewer agent - 5b. Iterate -- monitor CI ->
/resolve-pr-feedback-> AI self-review: up to 3 rounds, early-exit on clean; human review: address ALL (hook-enforced) - 6. Compound -- codify lessons as
.claude/rules/
See /go skill full details. See REFERENCE.md phase-specific checklists.
Phase Selection
Full flowchart REFERENCE.md#phase-flowchart.
| User says | Phases |
|---|---|
| "Build a new feature" | 1->2->2b->3->/go |
| "Fix this bug" | 1(reproduce)->3(TDD)->/go |
| "Refactor this module" | 1->2->2b->3->/go |
| "Write tests for X" | 3 only |
| "Ship it" / "Create a PR" | /go only |
| "Quick question" | Just answer |
| "Batch these 5 issues" | Sandcastle -- parallel agents |
| "Work on this overnight" | Sandcastle -- AFK delegation |
See REFERENCE.md detailed checklists + Sandcastle integration.