396 lines
17 KiB
Markdown
396 lines
17 KiB
Markdown
# BTerminal v3 — Mission Control Redesign
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## Goal
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Transform BTerminal from a multi-pane terminal/agent tool into a **multi-project mission control** — a helm for managing multiple development projects simultaneously, each with its own Claude agent session, team agents, terminals, and settings.
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## Status: All Phases Complete (1-10) — Rev 2
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---
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## Core Concept
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**Project Groups** are workspaces. Each group has up to 5 projects arranged horizontally. One group visible at a time. Projects have their own Claude subscription, working directory, icon, and settings. The app is a dashboard for orchestrating Claude agents across a portfolio of projects.
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### Key Mental Model
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```
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BTerminal v2: Terminal emulator with agent sessions (panes in a grid)
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BTerminal v3: Project orchestration dashboard (projects in a workspace)
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```
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### User Requirements
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1. Projects arranged in **project groups** (many groups, switch between them)
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2. Each group has **up to 5 projects** shown horizontally
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3. Group/project config via **main menu** (command palette / hidden drawer, Ctrl+K)
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4. Per-project settings: Claude subscription, working dir, icon (nerd font), name, identifier, description, enabled
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5. Project group = workspace on screen
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6. Each project box: Claude session (default, resume previous) + team agents (right) + terminal tabs (below)
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7. **4 workspace tabs**: Sessions | Docs | Context | Settings
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8. App launchable with `--group <name>` CLI arg
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9. JSON config file defines all groups (`~/.config/bterminal/groups.json`)
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10. Session continuity: resume previous + restore history visually
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11. SSH sessions: spawnable within a project's terminal tabs
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12. ctx viewer: workspace tab #3
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---
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## Architecture (Post-Adversarial Review)
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### Adversarial Review Summary
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3 agents reviewed the architecture: Architect (advocate), Devil's Advocate (attacker), UX+Performance Specialist.
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**12 issues identified by Devil's Advocate. Resolutions:**
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| # | Issue | Severity | Resolution |
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|---|---|---|---|
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| 1 | xterm.js 4-instance ceiling (WebKit2GTK OOM) | Critical | Lazy-init + scrollback serialization. Budget: 4 active xterm, unlimited suspended (text buffer). Enforced in code. |
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| 2 | Single sidecar = SPOF for all projects | Critical | Accept for v3.0 (existing crash recovery). Per-project pool deferred to v3.1 if needed. |
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| 3 | Session identity collision (sdkSessionId not persisted) | Major | Persist sdkSessionId in SQLite `project_agent_state` table. Per-project CLAUDE_CONFIG_DIR isolation. |
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| 4 | Layout store has no workspace concept | Critical | Full rewrite: `workspace.svelte.ts` replaces `layout.svelte.ts`. |
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| 5 | 384px per project unusable on 1920px | Major | Adaptive: compute visible count from viewport width (`Math.floor(width / 520)`). 5@5120px, 3@1920px, scroll-snap for rest. min-width 480px. |
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| 6 | JSON config + SQLite = split-brain | Major | JSON for groups/projects config (human-editable). SQLite for session state. JSON loaded at startup only, no hot-reload. |
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| 7 | Agent dispatcher is global singleton, no project scoping | Major | Add projectId to AgentSession. Dispatcher routes by project. Per-project cleanup on workspace switch. |
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| 8 | Markdown discovery undefined | Minor | Priority list: CLAUDE.md, README.md, docs/*.md (max 20). Rust command scans with depth limit. |
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| 9 | Keyboard shortcut conflicts (3 layers) | Major | Shortcut manager: Terminal layer (focused only), Workspace layer (Ctrl+1-5), App layer (Ctrl+K, Ctrl+G). |
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| 10 | Remote machine support orphaned | Major | Elevate to project level (project.remote_machine_id). Defer integration to v3.1. |
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| 11 | No graceful degradation for broken projects | Major | Project health state: healthy/degraded/unavailable/error. Colored dot indicator. |
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| 12 | Flat event stream wastes CPU for hidden projects | Minor | Buffer messages for inactive workspace projects. Flush on activation. |
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---
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## Data Model
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### Project Group Config (`~/.config/bterminal/groups.json`)
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```jsonc
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{
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"version": 1,
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"groups": [
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{
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"id": "work-ai",
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"name": "AI Projects",
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"projects": [
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{
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"id": "bterminal",
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"name": "BTerminal",
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"identifier": "bterminal",
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"description": "Terminal emulator with Claude integration",
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"icon": "\uf120",
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"cwd": "/home/hibryda/code/ai/BTerminal",
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"profile": "default",
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"enabled": true
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}
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]
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}
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],
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"activeGroupId": "work-ai"
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}
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```
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### TypeScript Types (`v2/src/lib/types/groups.ts`)
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```typescript
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export interface ProjectConfig {
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id: string;
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name: string;
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identifier: string;
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description: string;
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icon: string;
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cwd: string;
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profile: string;
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enabled: boolean;
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}
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export interface GroupConfig {
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id: string;
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name: string;
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projects: ProjectConfig[]; // max 5
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}
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export interface GroupsFile {
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version: number;
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groups: GroupConfig[];
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activeGroupId: string;
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}
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```
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### SQLite Schema Additions
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```sql
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ALTER TABLE sessions ADD COLUMN project_id TEXT DEFAULT '';
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CREATE TABLE IF NOT EXISTS agent_messages (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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session_id TEXT NOT NULL,
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project_id TEXT NOT NULL,
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sdk_session_id TEXT,
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message_type TEXT NOT NULL,
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content TEXT NOT NULL,
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parent_id TEXT,
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created_at INTEGER NOT NULL,
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FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE
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);
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CREATE INDEX idx_agent_messages_session ON agent_messages(session_id);
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CREATE INDEX idx_agent_messages_project ON agent_messages(project_id);
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CREATE TABLE IF NOT EXISTS project_agent_state (
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project_id TEXT PRIMARY KEY,
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last_session_id TEXT NOT NULL,
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sdk_session_id TEXT,
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status TEXT NOT NULL,
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cost_usd REAL DEFAULT 0,
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input_tokens INTEGER DEFAULT 0,
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output_tokens INTEGER DEFAULT 0,
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last_prompt TEXT,
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updated_at INTEGER NOT NULL
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);
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```
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---
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## Component Architecture
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### Component Tree
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```
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App.svelte [REWRITTEN]
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├── CommandPalette.svelte [NEW]
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├── GlobalTabBar.svelte [NEW] Sessions | Docs | Context | Settings
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├── [Tab: Sessions]
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│ └── ProjectGrid.svelte [NEW] Horizontal flex + scroll-snap
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│ └── ProjectBox.svelte [NEW] Per-project container
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│ ├── ProjectHeader.svelte [NEW] Icon + name + status dot
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│ ├── ClaudeSession.svelte [NEW, from AgentPane] Main session
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│ ├── TeamAgentsPanel.svelte [NEW] Right panel for subagents
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│ │ └── AgentCard.svelte [NEW] Compact subagent view
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│ └── TerminalTabs.svelte [NEW] Tabbed terminals
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│ ├── TabBar.svelte [NEW]
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│ └── TerminalPane.svelte [SURVIVES]
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├── [Tab: Docs]
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│ └── DocsTab.svelte [NEW]
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│ ├── MdFilePicker.svelte [NEW]
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│ └── MarkdownPane.svelte [SURVIVES]
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├── [Tab: Context]
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│ └── ContextPane.svelte [SURVIVES, extracted from pane]
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├── [Tab: Settings]
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│ └── SettingsTab.svelte [NEW]
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│ ├── ProjectSettingsEditor.svelte [NEW]
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│ └── GlobalSettings.svelte [NEW]
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├── StatusBar.svelte [MODIFIED]
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└── ToastContainer.svelte [SURVIVES]
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```
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### What Dies
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| v2 Component/Store | Reason |
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| TilingGrid.svelte | Replaced by ProjectGrid |
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| PaneContainer.svelte | Fixed project box structure |
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| SessionList.svelte (sidebar) | No sidebar; project headers replace |
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| SshSessionList.svelte | Absorbed into TerminalTabs |
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| SettingsDialog.svelte | Replaced by SettingsTab |
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| AgentPane.svelte | Split into ClaudeSession + TeamAgentsPanel |
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| layout.svelte.ts | Replaced by workspace.svelte.ts |
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| layout.test.ts | Replaced by workspace tests |
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### What Survives
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TerminalPane, MarkdownPane, AgentTree, ContextPane, StatusBar, ToastContainer, theme store, notifications store, agents store (modified), all adapters (agent-bridge, pty-bridge, claude-bridge, sdk-messages, session-bridge, ctx-bridge, ssh-bridge), all Rust backend (sidecar, pty, session, ctx, watcher), highlight utils.
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---
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## Layout System
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### Project Grid (Flexbox + scroll-snap)
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```css
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.project-grid {
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display: flex;
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gap: 4px;
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height: 100%;
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overflow-x: auto;
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scroll-snap-type: x mandatory;
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}
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.project-box {
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flex: 0 0 calc((100% - (N-1) * 4px) / N);
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scroll-snap-align: start;
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min-width: 480px;
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}
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```
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N computed from viewport: `Math.min(projects.length, Math.max(1, Math.floor(containerWidth / 520)))`
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### Project Box Internal Layout
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```
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┌─ ProjectHeader (28px) ──────────────────┐
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├─────────────────────┬───────────────────┤
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│ ClaudeSession │ TeamAgentsPanel │
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│ (flex: 1) │ (240px or overlay)│
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├─────────────────────┴───────────────────┤
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│ [Tab1] [Tab2] [+] TabBar 26px │
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├─────────────────────────────────────────┤
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│ Terminal content (xterm or scrollback) │
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└─────────────────────────────────────────┘
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```
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Team panel: inline at >2560px, overlay at <2560px. Collapsed when no subagents.
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### Responsive Breakpoints
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| Width | Visible Projects | Team Panel |
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|-------|-----------------|------------|
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| 5120px+ | 5 | inline 240px |
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| 3840px | 4 | inline 200px |
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| 2560px | 3 | overlay |
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| 1920px | 3 | overlay |
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| <1600px | 1 + project tabs | overlay |
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### xterm.js Budget: 4 Active Instances
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| State | xterm? | Memory |
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|-------|--------|--------|
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| Active-Focused | Yes | ~20MB |
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| Active-Background | Yes (if budget allows) | ~20MB |
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| Suspended | No (HTML pre scrollback) | ~200KB |
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| Uninitialized | No (placeholder) | 0 |
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On focus: serialize least-recent xterm scrollback, destroy it, create new for focused tab, reconnect PTY.
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### Project Accent Colors (Catppuccin)
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| Slot | Color | Variable |
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|------|-------|----------|
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| 1 | Blue | --ctp-blue |
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| 2 | Green | --ctp-green |
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| 3 | Mauve | --ctp-mauve |
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| 4 | Peach | --ctp-peach |
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| 5 | Pink | --ctp-pink |
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---
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## Sidecar Strategy
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**Single shared sidecar** (unchanged from v2). Per-project isolation via:
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- `cwd` per query (already implemented)
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- `claude_config_dir` per query (already implemented)
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- `session_id` routing (already implemented)
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No sidecar changes needed for v3.0.
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---
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## Keyboard Shortcuts
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| Shortcut | Action | Layer |
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|----------|--------|-------|
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| Ctrl+K | Command palette | App |
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| Ctrl+G | Switch group (palette filtered) | App |
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| Ctrl+1..5 | Focus project by index | App |
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| Alt+1..4 | Switch workspace tab | App |
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| Ctrl+N | New terminal in focused project | Workspace |
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| Ctrl+Shift+N | New agent query | Workspace |
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| Ctrl+Tab | Next terminal tab | Project |
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| Ctrl+W | Close terminal tab | Project |
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| Ctrl+, | Settings tab | App |
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| Ctrl+Shift+C/V | Copy/paste in terminal | Terminal |
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---
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## Implementation Phases
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### Phase 1: Data Model + Config [status: complete]
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**Milestone: Groups config loads/saves, SQLite migrations pass, workspace store works**
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- [x] Create `v2/src/lib/types/groups.ts` (TypeScript interfaces)
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- [x] Create `v2/src-tauri/src/groups.rs` (Rust structs + load/save)
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- [x] Add `groups_load`, `groups_save` Tauri commands to lib.rs
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- [x] SQLite migrations in session.rs: project_id column, agent_messages table, project_agent_state table
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- [x] Create `v2/src/lib/adapters/groups-bridge.ts` (IPC wrapper)
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- [x] Create `v2/src/lib/stores/workspace.svelte.ts` (replaces layout.svelte.ts)
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- [x] Add `--group` CLI argument parsing in main.rs
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- [x] Write tests for groups load/save and workspace store (24 vitest + 7 cargo)
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### Phase 2: Project Box Shell [status: complete]
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**Milestone: Project boxes render horizontally with headers, workspace tabs switch**
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- [x] Create GlobalTabBar.svelte (Sessions | Docs | Context | Settings)
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- [x] Create ProjectGrid.svelte (flex + scroll-snap container)
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- [x] Create ProjectBox.svelte (CSS grid: header | session-area | terminal-area)
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- [x] Create ProjectHeader.svelte (icon + name + status dot + accent color)
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- [x] Rewrite App.svelte (GlobalTabBar + tab content + StatusBar)
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- [x] Create CommandPalette.svelte, DocsTab.svelte, ContextTab.svelte, SettingsTab.svelte
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- [x] CSS for responsive project count + accent colors
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### Phase 3: Claude Session Integration [status: complete]
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**Milestone: Claude sessions run within project boxes, per-project profile isolation**
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- [x] Create ClaudeSession.svelte (wraps AgentPane, passes project cwd/profile/config_dir)
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### Phase 4: Terminal Tabs [status: complete]
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**Milestone: Each project has tabbed terminals with xterm budget enforcement**
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- [x] Create TerminalTabs.svelte (tab state per project, shell/SSH/agent tab types)
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### Phase 5: Team Agents Panel [status: complete]
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**Milestone: Subagents appear in right panel, not separate panes. MVP complete.**
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- [x] Create TeamAgentsPanel.svelte (right side of session area)
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- [x] Create AgentCard.svelte (compact subagent: status, messages, cost)
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### --- MVP BOUNDARY ---
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### Phase 6: Session Continuity [status: complete]
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- [x] Persist agent messages to SQLite on session complete (agent-dispatcher persistSessionForProject)
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- [x] Persist sdkSessionId in project_agent_state
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- [x] On startup, load cached messages per project (ClaudeSession restoreMessagesFromRecords)
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- [x] Session-project mapping via registerSessionProject()
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### Phase 7: Command Palette + Group Switching [status: complete]
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- [x] CommandPalette.svelte (overlay, Ctrl+K, fuzzy search)
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- [x] Group list with switching
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- [x] Workspace teardown on switch (clearAllAgentSessions + terminal tabs reset)
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### Phase 8: Docs Tab [status: complete]
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- [x] DocsTab.svelte with split layout (file picker + MarkdownPane)
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- [x] Auto-discovers markdown files per project via discoverMarkdownFiles
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### Phase 9: Settings Tab [status: complete]
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- [x] SettingsTab.svelte (group CRUD + project CRUD)
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- [x] 5-project limit enforcement
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### Phase 10: Polish + Cleanup [status: complete]
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- [x] Remove dead v2 components (TilingGrid, PaneContainer, PaneHeader, SessionList, SshSessionList, SshDialog, SettingsDialog)
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- [x] Remove empty directories (Layout/, Sidebar/, Settings/, SSH/)
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- [x] Rewrite StatusBar for workspace store
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- [x] Fix subagent routing (skip layout pane for project-scoped agents)
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- [x] All 138 vitest + cargo tests pass, vite build succeeds
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---
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## Decisions Log
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| Decision | Rationale | Date |
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| JSON for groups config, SQLite for session state | JSON is human-editable, shareable, version-controllable. SQLite for ephemeral runtime state. Load at startup only. | 2026-03-07 |
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| Adaptive project count from viewport width | 5@5120px, 3@1920px, scroll-snap for overflow. min-width 480px. Better than forcing 5 at all sizes. | 2026-03-07 |
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| Single shared sidecar (v3.0) | Existing multiplexed protocol handles concurrent sessions. Per-project pool deferred to v3.1 if crash isolation needed. Saves ~200MB RAM. | 2026-03-07 |
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| xterm budget: 4 active, unlimited suspended | WebKit2GTK OOM at ~5 instances. Serialize scrollback to text buffer, destroy xterm, recreate on focus. PTY stays alive. | 2026-03-07 |
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| Flexbox + scroll-snap over CSS Grid | Allows horizontal scroll on narrow screens. Scroll-snap gives clean project-to-project scrolling. | 2026-03-07 |
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| Team panel: inline >2560px, overlay <2560px | Adapts to available space. Collapsed when no subagents running. | 2026-03-07 |
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| 4 workspace tabs (Sessions/Docs/Context/Settings) | ctx viewer as separate tab per user requirement. Docs auto-discovered from projects. | 2026-03-07 |
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| Project accent colors from Catppuccin palette | Visual distinction: blue/green/mauve/peach/pink per slot 1-5. Applied to border + header tint. | 2026-03-07 |
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| Remote machines deferred to v3.1 | Elevate to project level (project.remote_machine_id) but don't implement in MVP. | 2026-03-07 |
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| Keyboard shortcut layers: App > Workspace > Terminal | Prevents conflicts. Terminal captures raw keys only when focused. App layer uses Ctrl+K/G. | 2026-03-07 |
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| AgentPane splits into ClaudeSession + TeamAgentsPanel | Team agents shown inline in right panel, not as separate panes. Saves xterm/pane slots. | 2026-03-07 |
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| Unmount/remount on group switch | Serialize xterm scrollbacks, destroy, remount new group. <100ms perceived. Frees ~80MB. | 2026-03-07 |
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| All themes map to --ctp-* CSS vars | 7 editor themes (VSCode Dark+, Atom One Dark, Monokai, Dracula, Nord, Solarized Dark, GitHub Dark) added alongside 4 Catppuccin. All map to same 26 --ctp-* CSS custom properties — zero component changes needed. | 2026-03-07 |
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## Errors Encountered
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| Error | Cause | Fix | Date |
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|---|---|---|---|
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