fabro/apps/fabro-web/package.json
Bryan Helmkamp 7ac15b28f0
feat(fabro-web): port /chats/new + /chats/:id from prototype (#289)
## Summary

Ports the validated `/chats/new` and `/chats/:id` chat surface from
`docs/superpowers/prototypes/2026-05-16-chats-new/` into
`apps/fabro-web`. Client-side scripted prototype mounted inside the
existing `AppShell`; replaces `/start` as the planned new "kick off
agent work" entry point (but does not delete `/start` in this phase).

- New routes: `/chats/new` (empty-state composer) and `/chats/:chatId`
(active conversation with assistant-ui's `<Thread>`, scripted streaming
replies, markdown + tool-call rendering).
- Drives `@assistant-ui/react` + `@assistant-ui/react-ui` via
`useLocalRuntime` and a custom `ChatModelAdapter` that cycles a 6-entry
scripted reply bank.
- Tailwind v4 cascade fix: assistant-ui CSS is now imported via `@layer
assistant-ui` so v4 utilities cascade above the package's unlayered
scoped preflight. Includes a discovered Bun-specific tweak — see Notable
Deviations below.
- StrictMode-safe first-message handoff: store seeds the user message
into `seedMessages` with a `pendingResponse: true` flag, and
`chats-detail` triggers a single `runtime.thread.startRun({ parentId:
null })` then consumes the flag. Avoids the prototype's
autorespond-lost-stream race under React 19 StrictMode.

The Ask-Fabro right sidebar (also in the prototype) is **out of scope**
for this PR.

Companion spec:
[`docs/superpowers/specs/2026-05-16-chats-new-prototype-design.md`](../tree/chats-new-port/docs/superpowers/specs/2026-05-16-chats-new-prototype-design.md)
Implementation plan:
[`docs/superpowers/plans/2026-05-16-chats-new-fabro-web-port.md`](../tree/chats-new-port/docs/superpowers/plans/2026-05-16-chats-new-fabro-web-port.md)

## Screenshots

Captured from a local debug `fabro server` running this branch's binary,
signed in via GitHub.

### `/chats/new` (empty state)

![chats-new empty
state](https://github.com/fabro-sh/fabro/raw/chats-new-port/docs/superpowers/prototypes/2026-05-16-chats-new/screenshots/chats-new-v4.png)

### `/chats/:chatId` (active conversation)

![chats-detail active
chat](https://github.com/fabro-sh/fabro/raw/chats-new-port/docs/superpowers/prototypes/2026-05-16-chats-new/screenshots/chats-detail-v4.png)

## Files

**New** (under `apps/fabro-web/`):
- `app/lib/chats-types.ts` — `Chat` wrapper + `ChatContentPart`
discriminated union over the API client's `CompletionContentPart`
- `app/lib/chats-script.ts` — 6-entry scripted reply bank
(`CompletionMessage[]`)
- `app/lib/chats-store.tsx` — Context + `useReducer` for chat metadata,
`pendingResponse` flag, scriptIndex
- `app/lib/chats-runtime.ts` — `createScriptedAdapter` +
`toThreadMessages` boundary converter
- `app/lib/test-utils.tsx` — minimal `renderHook` shim (lifts the
duplicated `IS_REACT_ACT_ENVIRONMENT` + dep-warning silencing pattern
out of `install-app.test.tsx`)
-
`app/components/chats/{tool-fallback,composer-chips,custom-composer}.tsx`
- `app/routes/{chats-layout,chats-new,chats-detail}.tsx`
- Tests: `chats-store.test.tsx` (5), `chats-runtime.test.ts` (4),
`chats-router.test.tsx` (3)

**Modified:**
- `package.json` — adds `@assistant-ui/{react,react-ui,react-markdown}`
(pinned exactly to versions verified in the prototype)
- `app/app.css` — `@layer` declaration + assistant-ui CSS imports into
`layer(assistant-ui)` + `.fabro-chat` `--aui-*` variable overrides
mapping to the Fabro palette
- `app/root.tsx` — removed `import "./app.css"` (see Notable Deviations)
- `app/router.tsx` — wires the chats routes under the AppShell tree

## Notable deviations from the plan

Two intentional deviations, both explained in their commit bodies:

1. **`apps/fabro-web/app/root.tsx` no longer imports `./app.css`.**
Bun's CSS bundler (used by `Bun.build` on `entry.tsx`) rejects
spec-valid `@layer name, name;` ordering between `@import` rules, even
though Tailwind's CLI accepts it. The CSS is built standalone by the
Tailwind CLI step in `scripts/build.ts` and linked from
`index.template.html`, so dropping the JS-side import bypasses Bun's
parser without any runtime change. A safety-net comment at the top of
`app.css` warns future engineers against re-adding the import. Commit:
`c37690be9`.
2. **`!` non-null assertions removed** in two places where the verbatim
prototype copy violated the global CLAUDE.md rule banning `!` in
production code: `chats-script.ts` now uses a typed `FALLBACK_REPLY` and
`??` coalescing; `composer-chips.tsx` lifts the first option of each
chip into a `DEFAULT_*` constant. `chats-runtime.test.ts`'s `for await`
drain loops were also replaced with `Array.fromAsync(...)` per the
no-loops-in-tests rule. Commits: `ace6ac6d4`, `652ad97af`.

## Test plan

- [x] `cd apps/fabro-web && bun run typecheck` — clean
- [x] `bun test` — 383 pass / 0 fail (12 new tests for chats)
- [x] `cd apps/fabro-web && bun run build` — succeeds; assistant-ui CSS
bundled into `dist/assets/app.css`
- [x] **Manual browser smoke test** — debug `fabro` binary running this
branch served `/chats/new` and `/chats/seed_email` correctly inside the
real AppShell with GitHub-OAuth auth (screenshots above).

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-16 17:10:16 -04:00

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{
"name": "fabro-web",
"private": true,
"type": "module",
"scripts": {
"build": "bun run scripts/build.ts",
"dev": "bun run scripts/build.ts --watch",
"test": "bun test --isolate",
"typecheck": "tsc"
},
"dependencies": {
"@assistant-ui/react": "0.14.5",
"@assistant-ui/react-markdown": "0.14.0",
"@assistant-ui/react-ui": "0.2.1",
"@dnd-kit/core": "^6.3.1",
"@dnd-kit/sortable": "^10.0.0",
"@dnd-kit/utilities": "^3.2.2",
"@headlessui/react": "^2.2.9",
"@heroicons/react": "^2.2.0",
"@pierre/diffs": "1.1.15",
"@pierre/theme": "0.0.28",
"@pierre/trees": "1.0.0-beta.3",
"@qltysh/fabro-api-client": "workspace:*",
"@tailwindcss/typography": "^0.5.19",
"@viz-js/viz": "^3.24.0",
"@xterm/addon-fit": "^0.11.0",
"@xterm/xterm": "^6.0.0",
"axios": "^1.7.0",
"marked": "^18.0.0",
"react": "^19.2.4",
"react-dom": "^19.2.4",
"react-router": "7.12.0",
"swr": "^2.4.1"
},
"devDependencies": {
"@tailwindcss/cli": "^4.1.13",
"@types/node": "^22",
"@types/react": "^19.2.7",
"@types/react-dom": "^19.2.3",
"react-test-renderer": "19.2.0",
"tailwindcss": "^4.1.13",
"typescript": "^5.9.2"
}
}