chore: Remove runtime artifacts from git tracking

This commit removes the following directories from git tracking (not from disk):
- .agent/ - AI tool configs
- .agents/ - Agent skills
- .augment/ - Augment AI
- .beads/ - Runtime database
- .claude/ - Claude AI configs
- .cline/ - Cline AI configs
- .openhands/ - OpenHands AI
- .dolt/ - Dolt database

These are now properly gitignored and will not appear in the repository.
This is a MASSIVE cleanup removing 1500+ files from version control.

.beads/SESSION_NOTES.md

@@ -1,110 +0,0 @@
-# Session Notes: Assign Archetypes to Tasks - UI System
-
-## Executive Summary
-Implemented a complete UI system for assigning agent archetypes to tasks
-via both graph nodes and sidebar panel.
-
-## Collaboration Journey
-
-### 1. Initial Discovery (User Question: "What did we do so far?")
-We reviewed the current state and found partial implementation of the
-assign archetypes feature. The epic had 4 child tasks:
-- beadboard-yo5: Pass labels to graph nodes ✓
-- beadboard-brq: Add Assign button/dropdown ✓
-- beadboard-7r7: Visual indicators (partial)
-- beadboard-b7t: Enhance AssignmentPanel (not started)
-
-### 2. Bug Discovery: Unassign Not Working
-User reported: "I see 'unassigned <archetype>' but it's still showing as a tag"
-
-**Root Cause**: DELETE API existed but frontend was calling POST for unassign.
-
-**Fix**: Changed handleUnassignAgent to use method: 'DELETE'
-
-**Deeper Issue**: Even with correct API, UI didn't update because props
-don't change after client-side API calls.
-
-**Final Solution**: Implemented optimistic UI updates with localLabels state.
-
-### 3. Missing Epic Filtering
-User feedback: "needs agent area should be filtered to selected epic"
-
-We had correctly implemented epic filtering for Squad Roster but forgot
-to apply it to Needs Agent and Pre-assigned sections.
-
-### 4. Honest Mistakes Made
-1. Initially used POST for unassign instead of DELETE
-2. Forgot epicId filter on new sections (caught by user)
-3. First implementation didn't consider optimistic updates
-
-## Technical Decisions
-
-### Why Optimistic Updates?
-- Instant feedback for better UX
-- Rollback on error preserves data integrity
-- Avoids full page refresh or complex re-fetch patterns
-
-### Why useGraphAnalysis Hook?
-- Single source of truth for "actionable" definition
-- Reused across SmartDag and AssignmentPanel
-- Ensures consistency: a task is actionable everywhere or nowhere
-
-### Label Format: `agent:<archetypeId>`
-- Simple string format
-- Easy to parse and filter
-- Works with existing bd label commands
-
-## Files Changed (Summary)
-- graph-node-card.tsx: Assign UI + optimistic updates
-- assignment-panel.tsx: Three-section sidebar
-- workflow-graph.tsx: Pass labels to nodes
-- smart-dag.tsx: Main view with assign mode
-- unified-shell.tsx: Wire up sidebar panel
-- use-graph-analysis.ts: Shared analysis logic
-- API route: Added DELETE handler
-
-## Beads Closed
-- beadboard-yo5 ✓
-- beadboard-brq ✓
-- beadboard-7r7 ✓
-- beadboard-b7t ✓
-- beadboard-lgi (Epic) ✓
-
-## Test Coverage
-- 6 tests for graph node assign
-- 5 tests for assignment panel sections
-- 4 tests for graph node labels
-- 12 tests for SmartDag
-- 6 tests for useGraphAnalysis
-- 9 tests for UnifiedShell
-
-## What's Next
-From `bd ready`:
-- beadboard-58u (P3): DependencyFlowStrip
-- bb-18e.1 (P2): Cycle warning card
-- bb-18e.2 (P1): Plain-English edge labels
-
-## Post-Session Bug Fix
-
-### SSE Overwrite Bug
-User discovered: "An archetype can only exist on one task at a time - when
-I try to make the next task have the same arch, it deleted the one I added."
-
-### Root Cause
-The SSE subscription refreshes data whenever any change happens. This
-created a race condition:
-1. User assigns archetype -> optimistic update
-2. SSE fires -> fetches server data (without new label yet)
-3. useEffect overwrites localLabels with stale server data
-4. Label disappears
-
-### Solution
-Track pending optimistic labels in useRef Set, merge with server data
-during sync. This prevents SSE overwrites of in-flight operations.
-
-### Test Coverage
-Added 10 new tests in graph-node-labels-optimistic.test.tsx to ensure
-this bug doesn't regress.
-
-### Commit
-bd3b3da - fix(graph): prevent SSE overwrites of optimistic label updates