v2.0.0-beta: write tools, pending-changes queue, inference loop, API routes

Phase 2 of v2.0. BooCoder is now a functional write-capable chatbot.

Write-path guard: resolveWritePath() uses resolve() (no realpath — files may
not exist for creates) + prefix-check + secret-file deny list (.env, *.pem,
id_rsa*, etc.). 23 unit tests cover traversal attacks.

Pending-changes service: queueEdit/Create/Delete → applyOne/All →
rejectOne/All → rewindOne. Edit diffs stored as JSON {old, new}. All writes
queue before touching disk; apply re-validates the path guard.

5 write tools: edit_file, create_file, delete_file, apply_pending, rewind.
Registered alongside 25 read-only tools from BooChat (30 total, alpha-sorted).
Write tools use a module-level inference context for sql+sessionId injection.

Inference loop via workspace dependency: apps/coder imports
createInferenceRunner, createBroker, ALL_TOOLS from @boocode/server (dist/).
apps/server gains declaration: true + exports map with typed subpath entries.
No code duplication — one inference engine shared by both apps.

API routes: POST /api/sessions/:id/messages (user msg → inference), POST stop,
GET/POST pending-changes CRUD (5 endpoints), WebSocket session streaming.

Dockerfile updated to build apps/server first (coder depends on its .d.ts).
Health endpoint reports tool count: {"ok":true,"db":true,"tools":30}.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/server/package.json

@@ -4,6 +4,23 @@
   "private": true,
   "type": "module",
   "main": "dist/index.js",
+  "exports": {
+    ".": { "types": "./dist/index.d.ts", "default": "./dist/index.js" },
+    "./inference": { "types": "./dist/services/inference/index.d.ts", "default": "./dist/services/inference/index.js" },
+    "./tools": { "types": "./dist/services/tools.d.ts", "default": "./dist/services/tools.js" },
+    "./broker": { "types": "./dist/services/broker.d.ts", "default": "./dist/services/broker.js" },
+    "./compaction": { "types": "./dist/services/compaction.d.ts", "default": "./dist/services/compaction.js" },
+    "./model-context": { "types": "./dist/services/model-context.d.ts", "default": "./dist/services/model-context.js" },
+    "./system-prompt": { "types": "./dist/services/system-prompt.d.ts", "default": "./dist/services/system-prompt.js" },
+    "./agents": { "types": "./dist/services/agents.d.ts", "default": "./dist/services/agents.js" },
+    "./truncate": { "types": "./dist/services/truncate.d.ts", "default": "./dist/services/truncate.js" },
+    "./path-guard": { "types": "./dist/services/path_guard.d.ts", "default": "./dist/services/path_guard.js" },
+    "./file-ops": { "types": "./dist/services/file_ops.d.ts", "default": "./dist/services/file_ops.js" },
+    "./types": { "types": "./dist/types/api.d.ts", "default": "./dist/types/api.js" },
+    "./ws-frames": { "types": "./dist/types/ws-frames.d.ts", "default": "./dist/types/ws-frames.js" },
+    "./db": { "types": "./dist/db.d.ts", "default": "./dist/db.js" },
+    "./config": { "types": "./dist/config.d.ts", "default": "./dist/config.js" }
+  },
   "scripts": {
     "dev": "tsx watch src/index.ts",
     "build": "tsc && node -e \"import('node:fs').then(fs=>fs.copyFileSync('src/schema.sql','dist/schema.sql'))\"",

apps/server/tsconfig.json

@@ -7,7 +7,7 @@
     "rootDir": "src",
     "lib": ["ES2022"],
     "types": ["node"],
-    "declaration": false,
+    "declaration": true,
     "sourceMap": true
   },
   "include": ["src/**/*"],