| Dimension | Shared | Only in A | Only in B | Overlap |
|---|---|---|---|---|
| Sections | 0 | 13 | 3 | 0% |
| Commands | 0 | 0 | 0 | — |
| Section tags | 2 | 6 | 1 | 22% |
What each file covers
Sections
0 shared · 13 only in A · 3 only in B- − Second Brain — Windsurf Rules
- − Project Overview
- − Tech Stack
- − Monorepo
- − Commands
- − Coding Rules
- − Always
- − Never
- − Backend Patterns
- − Frontend Patterns
- − Testing
- − Data Model
- − Documentation
- + Second Brain — Cursor Rules
- + Stack
- + Rules
Commands
neither file has anySection tags
2 shared · 6 only in A · 1 only in B- − setup
- − code-style
- − architecture
- − types
- − monorepo
- − docs
- + agent-behaviour
- test
- do-not
Line diff
thangaram611/second-brain · .windsurfrules
@@ −1 @@
1# Second Brain — Windsurf Rules
2
3## Project Overview
4
5Developer knowledge graph — pnpm monorepo with Turborepo. Node.js 22+, TypeScript 5.8+ strict mode, ESM only.
6
7For full architecture: see docs/architecture.md
8For agent instructions: see AGENTS.md
9
10## Tech Stack
11
12- Runtime: Node.js 22+, ESM only ("type": "module")
13- Language: TypeScript 5.8+ strict mode
14- Database: SQLite (better-sqlite3) + Drizzle ORM, WAL mode
15- Search: FTS5 (BM25) + sqlite-vec (cosine KNN), Reciprocal Rank Fusion
16- Validation: Zod v4
17- Testing: Vitest, in-memory SQLite
18- Build: tsdown (ESM), tsc (type-check)
19- Frontend: React 19, Zustand, Cytoscape.js, Tailwind CSS, Radix UI
20- Sync: Yjs CRDTs via Hocuspocus relay
21- IDs: ULIDs (ulidx). Never UUID
22- Timestamps: ISO 8601 strings. Never unix timestamps
23
24## Monorepo
25
26packages/types — Shared TypeScript types
27packages/core — Knowledge graph engine (Brain class in src/brain.ts)
28packages/collectors — Data collectors + streaming providers
29packages/ingestion — LLM extraction + embedding pipeline
30packages/sync — Yjs CRDT sync bridge
31packages/mcp-server — MCP tools (32 tools, stdio + HTTP)
32apps/server — Express 5 REST API + WebSocket (port 7430)
33apps/ui — React 19 + Cytoscape.js (port 5173)
34apps/relay — Hocuspocus CRDT relay (port 7421)
35tools/cli — brain CLI (Commander.js)
36
37## Commands
38
39pnpm install, pnpm build, pnpm test, pnpm check-types, pnpm dev
40
41## Coding Rules
42
43### Always
44- ESM only. Named exports. Re-export from index.ts
45- Use workspace imports: @second-brain/core, @second-brain/types
46- Zod schemas for all external input validation
47- ULIDs for IDs (via ulidx)
48- ISO 8601 for timestamps
49- Namespace field on all entities/relations
50- In-memory SQLite for tests
51- Try-catch with descriptive errors
52- batchUpsert for bulk operations
53
54### Never
55- Use `any` type
56- Use path aliases
57- Use UUIDs
58- Use unix timestamps or Date objects in storage
59- Write to entities_fts directly (auto-maintained via triggers)
60- Mutate stored confidence (decay is read-side only)
61- Sync 'personal' namespace
62- Import from package internals (use public API)
63
64## Backend Patterns
65
66- Drizzle ORM for queries (schema in packages/core/src/schema/)
67- Brain class is main facade (packages/core/src/brain.ts)
68- Relations: unique constraint on (sourceId, targetId, type)
69- Use createOrGet for idempotent relations
70- WebSocket broadcast after mutations
71- MCP tools: packages/mcp-server/src/tools/
72
73## Frontend Patterns
74
75- React 19 functional components
76- Zustand stores (one per feature in apps/ui/src/store/)
77- Cytoscape.js with diff-based rendering
78- Tailwind dark theme (zinc-950 bg)
79- REST client: apps/ui/src/lib/api.ts
80- WebSocket: apps/ui/src/lib/ws.ts (auto-reconnect)
81- HashRouter (React Router 7)
82
83## Testing
84
85- Vitest with globals (no imports for describe/it/expect)
86- In-memory SQLite for all DB tests
87- Co-located: __tests__/*.test.ts
88- Use Brain class directly (not HTTP)
89- Test happy path + error cases
90
91## Data Model
92
93Entity types (15): concept, decision, pattern, person, file, symbol, event, tool, fact, conversation, reference, implementation, pull_request, merge_request, branch
94
95Relation types (20): relates_to, depends_on, implements, supersedes, contradicts, derived_from, authored_by, decided_in, uses, tests, contains, co_changes_with, preceded_by, blocks, reviewed_by, merged_in_mr, merged_in_pr, touches_file, owns, parallel_with
96
97## Documentation
98
99- docs/architecture.md — Full technical architecture
100- docs/getting-started.md — Usage guide
101- docs/api-reference.md — REST API + MCP + CLI reference
102- AGENTS.md — Detailed agent instructions
103
thangaram611/second-brain · .cursor/rules/project.mdc
@@ +1 @@
1---
2description: "Core project conventions for Second Brain monorepo"
3mode: always
4---
5
6# Second Brain — Cursor Rules
7
8Developer knowledge graph. pnpm monorepo, Turborepo, Node.js 22+, TypeScript 5.8+ strict, ESM only.
9
10For full context, see @docs/architecture.md and @AGENTS.md.
11
12## Stack
13- SQLite (better-sqlite3) + Drizzle ORM + FTS5 + sqlite-vec
14- Zod v4 for validation, ULIDs for IDs, ISO 8601 timestamps
15- Vitest with in-memory SQLite for tests
16- tsdown for builds, tsc for type-checking
17
18## Rules
19- ESM only. Named exports. Re-export from index.ts
20- Use workspace imports: `@second-brain/core`, `@second-brain/types`
21- No `any`. No path aliases. No UUIDs. No unix timestamps
22- Namespace field on all entities/relations: 'personal' or project ID
23- FTS5 triggers auto-maintain search index — never write to entities_fts
24- Confidence decay is read-side only — never mutate stored confidence
25- batchUpsert for bulk operations (merges observations/tags)
26
@@ −1 +1 @@
1−# Second Brain — Windsurf Rules
1+---
2+description: "Core project conventions for Second Brain monorepo"
3+mode: always
4+---
25
3−## Project Overview
6+# Second Brain — Cursor Rules
47
5−Developer knowledge graph — pnpm monorepo with Turborepo. Node.js 22+, TypeScript 5.8+ strict mode, ESM only.
8+Developer knowledge graph. pnpm monorepo, Turborepo, Node.js 22+, TypeScript 5.8+ strict, ESM only.
69
7−For full architecture: see docs/architecture.md
8−For agent instructions: see AGENTS.md
10+For full context, see @docs/architecture.md and @AGENTS.md.
911
10−## Tech Stack
12+## Stack
13+- SQLite (better-sqlite3) + Drizzle ORM + FTS5 + sqlite-vec
14+- Zod v4 for validation, ULIDs for IDs, ISO 8601 timestamps
15+- Vitest with in-memory SQLite for tests
16+- tsdown for builds, tsc for type-checking
1117
12−- Runtime: Node.js 22+, ESM only ("type": "module")
13−- Language: TypeScript 5.8+ strict mode
14−- Database: SQLite (better-sqlite3) + Drizzle ORM, WAL mode
15−- Search: FTS5 (BM25) + sqlite-vec (cosine KNN), Reciprocal Rank Fusion
16−- Validation: Zod v4
17−- Testing: Vitest, in-memory SQLite
18−- Build: tsdown (ESM), tsc (type-check)
19−- Frontend: React 19, Zustand, Cytoscape.js, Tailwind CSS, Radix UI
20−- Sync: Yjs CRDTs via Hocuspocus relay
21−- IDs: ULIDs (ulidx). Never UUID
22−- Timestamps: ISO 8601 strings. Never unix timestamps
23−
24−## Monorepo
25−
26−packages/types — Shared TypeScript types
27−packages/core — Knowledge graph engine (Brain class in src/brain.ts)
28−packages/collectors — Data collectors + streaming providers
29−packages/ingestion — LLM extraction + embedding pipeline
30−packages/sync — Yjs CRDT sync bridge
31−packages/mcp-server — MCP tools (32 tools, stdio + HTTP)
32−apps/server — Express 5 REST API + WebSocket (port 7430)
33−apps/ui — React 19 + Cytoscape.js (port 5173)
34−apps/relay — Hocuspocus CRDT relay (port 7421)
35−tools/cli — brain CLI (Commander.js)
36−
37−## Commands
38−
39−pnpm install, pnpm build, pnpm test, pnpm check-types, pnpm dev
40−
41−## Coding Rules
42−
43−### Always
18+## Rules
4419 - ESM only. Named exports. Re-export from index.ts
45−- Use workspace imports: @second-brain/core, @second-brain/types
46−- Zod schemas for all external input validation
47−- ULIDs for IDs (via ulidx)
48−- ISO 8601 for timestamps
49−- Namespace field on all entities/relations
50−- In-memory SQLite for tests
51−- Try-catch with descriptive errors
52−- batchUpsert for bulk operations
53−
54−### Never
55−- Use `any` type
56−- Use path aliases
57−- Use UUIDs
58−- Use unix timestamps or Date objects in storage
59−- Write to entities_fts directly (auto-maintained via triggers)
60−- Mutate stored confidence (decay is read-side only)
61−- Sync 'personal' namespace
62−- Import from package internals (use public API)
63−
64−## Backend Patterns
65−
66−- Drizzle ORM for queries (schema in packages/core/src/schema/)
67−- Brain class is main facade (packages/core/src/brain.ts)
68−- Relations: unique constraint on (sourceId, targetId, type)
69−- Use createOrGet for idempotent relations
70−- WebSocket broadcast after mutations
71−- MCP tools: packages/mcp-server/src/tools/
72−
73−## Frontend Patterns
74−
75−- React 19 functional components
76−- Zustand stores (one per feature in apps/ui/src/store/)
77−- Cytoscape.js with diff-based rendering
78−- Tailwind dark theme (zinc-950 bg)
79−- REST client: apps/ui/src/lib/api.ts
80−- WebSocket: apps/ui/src/lib/ws.ts (auto-reconnect)
81−- HashRouter (React Router 7)
82−
83−## Testing
84−
85−- Vitest with globals (no imports for describe/it/expect)
86−- In-memory SQLite for all DB tests
87−- Co-located: __tests__/*.test.ts
88−- Use Brain class directly (not HTTP)
89−- Test happy path + error cases
90−
91−## Data Model
92−
93−Entity types (15): concept, decision, pattern, person, file, symbol, event, tool, fact, conversation, reference, implementation, pull_request, merge_request, branch
94−
95−Relation types (20): relates_to, depends_on, implements, supersedes, contradicts, derived_from, authored_by, decided_in, uses, tests, contains, co_changes_with, preceded_by, blocks, reviewed_by, merged_in_mr, merged_in_pr, touches_file, owns, parallel_with
96−
97−## Documentation
98−
99−- docs/architecture.md — Full technical architecture
100−- docs/getting-started.md — Usage guide
101−- docs/api-reference.md — REST API + MCP + CLI reference
102−- AGENTS.md — Detailed agent instructions
20+- Use workspace imports: `@second-brain/core`, `@second-brain/types`
21+- No `any`. No path aliases. No UUIDs. No unix timestamps
22+- Namespace field on all entities/relations: 'personal' or project ID
23+- FTS5 triggers auto-maintain search index — never write to entities_fts
24+- Confidence decay is read-side only — never mutate stored confidence
25+- batchUpsert for bulk operations (merges observations/tags)
10326
