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Plugin pairs with Symphony — Composer's output (issues in the project's tracker) is Symphony's input. State-aware /composer command walks the user through 11 phases: concept, users (with workflow probing for hidden actors), requirements/NFR/IA, design system, interaction design, flows, mocks, architecture, stories, roadmap, load. Each phase produces a reviewable artifact in docs/planning/ (or, for design and interaction, a project-local skill — see below). Architecture is intentionally LAST, after the spec is complete. Mocks are JSX/TSX regardless of final stack and pass a "text feasibility" audit — every visible string is categorized (static/computed/authored), computed strings are traced to source data, and any string implying an unspecified feature halts the commit. Design system and interaction design are produced as PROJECT-LOCAL SKILLS in .claude/skills/<slug>-design-system/ and .claude/skills/<slug>-interaction-design/, not as docs in docs/planning/. Skills auto-load via description matching whenever UI work happens; a reference doc gets read once and drifts out of context. The mocks skill imports tokens directly from the design-system skill for a single source of truth across mocks and (eventually) real code. ui-system is currently a PLACEHOLDER — captures the minimum needed for mocks to proceed with <TBD: ...> markers as a return-pass worklist. Full interview specification is the next pass. Council touchpoints baked in: PM/skeptic/end-user after requirements, end-user/a11y after mocks, full architecture council after architecture, plus auto-additions (legal-triage on regulated data, privacy-advocate on PII, finance-controller on money flows). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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composer
Discovery-phase companion. Composer interviews you from "I want an app that…"
to a tree of stories in your issue tracker, producing reviewable artifacts in
docs/planning/ along the way. Pairs with Symphony — Composer's output
(stories in the tracker) is Symphony's input (work to dispatch).
Like Symphony, Composer is tracker-agnostic. The project's CLAUDE.md
documents how to write to the tracker; Composer's load phase reads those
instructions.
Phase order
| # | Phase | Artifact(s) | Skill |
|---|---|---|---|
| 1 | Concept | docs/planning/concept.md |
composer |
| 2 | Users & workflows | docs/planning/users.md |
composer |
| 3 | Requirements | docs/planning/{requirements,nfr,ia}.md |
composer |
| 4 | Design system | .claude/skills/<slug>-design-system/ (project skill) |
ui-system (placeholder) |
| 5 | Interaction design | .claude/skills/<slug>-interaction-design/ (project skill) |
ui-system (placeholder) |
| 6 | Flows | docs/planning/flows.md |
composer |
| 7 | Mocks | docs/planning/mocks/*.tsx |
composer-mocks |
| 8 | Architecture | docs/planning/architecture.md + adr/NNNN-*.md |
composer |
| 9 | Stories | docs/planning/stories.md |
composer |
| 10 | Roadmap | docs/planning/roadmap.md |
composer |
| 11 | Load | (project's tracker) | composer |
Phases 4 and 5 do not write to docs/planning/. The design-system and
interaction-design artifacts are project-local skills in .claude/skills/
because they need to auto-load via description matching whenever UI work
is happening. A reference doc gets read once and drifts out of context as
the conversation grows; a skill loads on demand every time the trigger
matches. docs/planning/ gets pointer files so the planning index stays
discoverable.
Phase 7 imports tokens directly from the skill, not from a copy:
import { color, spacing, fontSize } from
"../../.claude/skills/<slug>-design-system/tokens";
Single source of truth across mocks, real components, themes, and any future visual code in the project.
Architecture is last on purpose. It's a response to a complete spec, not a setting picked at the start. Stack choices made before the design system, interaction model, and mocks lock you into shapes that don't fit the problem.
Layout
commands/composer.md— main entry, state-aware. Continues from the first missing artifact indocs/planning/.commands/composer-review.md— summon a council on the current artifact.commands/composer-mock.md— generate or revise a mock for a named flow.commands/composer-load.md— push stories to the project's tracker.commands/composer-status.md— show what's done, missing, and stale.skills/composer/SKILL.md— orchestrator: phase detection + interview.skills/composer-mocks/SKILL.md— JSX/TSX mock generation + text feasibility audit.skills/ui-system/SKILL.md— design + interaction system interview (placeholder; to be fleshed out).templates/*— starter skeletons for each artifact.
Council touchpoints
Composer auto-suggests councils at phase boundaries; users can also invoke
/composer-review at any time.
| After phase | Default council |
|---|---|
| Requirements | Lena (PM), Vera (skeptic), Marge (end-user) |
| Mocks | Marge (end-user), Maya (a11y) |
| Architecture | Tomás (architect), Gerald (sr engineer), Priya (DBA), Aisha (DevOps) |
| Pre-load | Marcus (eng manager), Vera (skeptic) — sanity-check scope honesty |
Composer scans content and adds:
- Femi (legal-triage) when it spots regulated jurisdictions, third-party data flows, or licensing questions
- Camila (privacy-advocate) when it spots PII, multi-user data, or DNA/health data
- Ingrid (finance-controller) when it spots money flows, billing, refunds, or subscriptions
Three things Composer doesn't do
- Invent users. The interview probes for hidden actors (agents, integrations, future-self) by asking about workflows, not by drafting speculative personas.
- Lie in mocks. Every visible string in a mock is annotated as static / computed / authored, with the source data and transform named. Strings that imply unspecified features get flagged before the mock is committed.
- Push to the tracker without confirmation. Always shows a dry run before creating issues.
Handoff to Symphony
After load, the project has stories in its tracker. Run /symphony-init to
set up the orchestrator that will execute them.