feat!: add granular node types, GitNexus comparison, PreToolUse hooks, multi-repo MCP roadmap

- Node types: Go struct→struct, Rust struct/enum/trait, Java enum,
  C# struct/record/enum, PHP trait/enum, Ruby module — in both WASM
  and native Rust extractors
- Add SYMBOL_KINDS constant and update all kind IN filters across
  queries, builder, export, embedder, cycles, watcher, and MCP
- Add GitNexus column to README comparison table
- Add Phase 2.5 Multi-Repo MCP to ROADMAP
- Add PreToolUse hooks for Read/Grep context enrichment via codegraph deps
- Update CLAUDE.md and README with new node kind documentation

BREAKING CHANGE: Node kinds changed for structs, enums, traits, records,
and modules. Rebuild with `codegraph build --no-incremental`.

Author: github-actions[bot]

.claude/hooks/enrich-context.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+# enrich-context.sh — PreToolUse hook for Read and Grep tools
+# Provides dependency context from codegraph when reading/searching files.
+# Always exits 0 (informational only, never blocks).
+
+set -euo pipefail
+
+# Read the tool input from stdin
+INPUT=$(cat)
+
+# Extract file path based on tool type
+# Read tool uses tool_input.file_path, Grep uses tool_input.path
+FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // empty' 2>/dev/null)
+
+# Guard: no file path found
+if [ -z "$FILE_PATH" ]; then
+  exit 0
+fi
+
+# Guard: codegraph DB must exist
+DB_PATH="${CLAUDE_PROJECT_DIR:-.}/.codegraph/graph.db"
+if [ ! -f "$DB_PATH" ]; then
+  exit 0
+fi
+
+# Guard: codegraph must be available
+if ! command -v codegraph &>/dev/null && ! command -v npx &>/dev/null; then
+  exit 0
+fi
+
+# Convert absolute path to relative (strip project dir prefix)
+REL_PATH="$FILE_PATH"
+if [[ "$FILE_PATH" == "${CLAUDE_PROJECT_DIR}"* ]]; then
+  REL_PATH="${FILE_PATH#"${CLAUDE_PROJECT_DIR}"/}"
+fi
+# Normalize backslashes to forward slashes (Windows compatibility)
+REL_PATH="${REL_PATH//\\//}"
+
+# Run codegraph deps and capture output
+DEPS=""
+if command -v codegraph &>/dev/null; then
+  DEPS=$(codegraph deps "$REL_PATH" --json -d "$DB_PATH" 2>/dev/null) || true
+else
+  DEPS=$(npx --yes @optave/codegraph deps "$REL_PATH" --json -d "$DB_PATH" 2>/dev/null) || true
+fi
+
+# Guard: no output or error
+if [ -z "$DEPS" ] || [ "$DEPS" = "null" ]; then
+  exit 0
+fi
+
+# Output as informational context (never deny)
+echo "$DEPS" | jq -c '{
+  hookSpecificOutput: (
+    "Codegraph context for " + (.file // "unknown") + ":\n" +
+    "  Imports: " + ((.results[0].imports // []) | length | tostring) + " files\n" +
+    "  Imported by: " + ((.results[0].importedBy // []) | length | tostring) + " files\n" +
+    "  Definitions: " + ((.results[0].definitions // []) | length | tostring) + " symbols"
+  )
+}' 2>/dev/null || true
+
+exit 0

.claude/settings.json

@@ -10,6 +10,26 @@
             "timeout": 10
           }
         ]
+      },
+      {
+        "matcher": "Read",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"$CLAUDE_PROJECT_DIR/.claude/hooks/enrich-context.sh\"",
+            "timeout": 5
+          }
+        ]
+      },
+      {
+        "matcher": "Grep",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"$CLAUDE_PROJECT_DIR/.claude/hooks/enrich-context.sh\"",
+            "timeout": 5
+          }
+        ]
       }
     ]
   }

CLAUDE.md

@@ -42,7 +42,7 @@ JS source is plain JavaScript (ES modules) in `src/`. No transpilation step. The
 | `index.js` | Programmatic API exports |
 | `builder.js` | Graph building: file collection, parsing, import resolution, incremental hashing |
 | `parser.js` | tree-sitter WASM wrapper; `LANGUAGE_REGISTRY` + per-language extractors for functions, classes, methods, imports, exports, call sites |
-| `queries.js` | Query functions: symbol search, file deps, impact analysis, diff-impact |
+| `queries.js` | Query functions: symbol search, file deps, impact analysis, diff-impact; `SYMBOL_KINDS` constant defines all node kinds |
 | `embedder.js` | Semantic search with `@huggingface/transformers`; multi-query RRF ranking |
 | `db.js` | SQLite schema and operations (`better-sqlite3`) |
 | `mcp.js` | MCP server exposing graph queries to AI agents |
@@ -60,6 +60,7 @@ JS source is plain JavaScript (ES modules) in `src/`. No transpilation step. The
 - Platform-specific prebuilt binaries published as optional npm packages (`@optave/codegraph-{platform}-{arch}`)
 - WASM grammars are built from devDeps on `npm install` (via `prepare` script) and not committed to git — used as fallback when native addon is unavailable
 - **Language parser registry:** `LANGUAGE_REGISTRY` in `parser.js` is the single source of truth for all supported languages — maps each language to `{ id, extensions, grammarFile, extractor, required }`. `EXTENSIONS` in `constants.js` is derived from the registry. Adding a new language requires one registry entry + extractor function
+- **Node kinds:** `SYMBOL_KINDS` in `queries.js` lists all valid kinds: `function`, `method`, `class`, `interface`, `type`, `struct`, `enum`, `trait`, `record`, `module`. Language-specific types use their native kind (e.g. Go structs → `struct`, Rust traits → `trait`, Ruby modules → `module`) rather than mapping everything to `class`/`interface`
 - `@huggingface/transformers` and `@modelcontextprotocol/sdk` are optional dependencies, lazy-loaded
 - Non-required parsers (all except JS/TS/TSX) fail gracefully if their WASM grammar is unavailable
 - Import resolution uses a 6-level priority system with confidence scoring (import-aware → same-file → directory → parent → global → method hierarchy)

README.md

@@ -45,27 +45,27 @@ Most dependency graph tools only tell you which **files** import which — codeg
 
 ### Feature comparison
 
-| Capability | codegraph | Madge | dep-cruiser | Skott | Nx graph | Sourcetrail |
-|---|:---:|:---:|:---:|:---:|:---:|:---:|
-| Function-level analysis | **Yes** | — | — | — | — | **Yes** |
-| Multi-language | **10** | 1 | 1 | 1 | Any (project) | 4 |
-| Semantic search | **Yes** | — | — | — | — | — |
-| MCP / AI agent support | **Yes** | — | — | — | — | — |
-| Git diff impact | **Yes** | — | — | — | Partial | — |
-| Persistent database | **Yes** | — | — | — | — | Yes |
-| Watch mode | **Yes** | — | — | — | Daemon | — |
-| CI workflow included | **Yes** | — | Rules | — | Yes | — |
-| Cycle detection | **Yes** | Yes | Yes | Yes | — | — |
-| Zero config | **Yes** | Yes | — | Yes | — | — |
-| Fully local / no telemetry | **Yes** | Yes | Yes | Yes | Partial | Yes |
-| Free & open source | **Yes** | Yes | Yes | Yes | Partial | Archived |
+| Capability | codegraph | Madge | dep-cruiser | Skott | Nx graph | Sourcetrail | GitNexus |
+|---|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
+| Function-level analysis | **Yes** | — | — | — | — | **Yes** | **Yes** |
+| Multi-language | **11** | 1 | 1 | 1 | Any (project) | 4 | 9 |
+| Semantic search | **Yes** | — | — | — | — | — | **Yes** |
+| MCP / AI agent support | **Yes** | — | — | — | — | — | **Yes** |
+| Git diff impact | **Yes** | — | — | — | Partial | — | **Yes** |
+| Persistent database | **Yes** | — | — | — | — | Yes | **Yes** |
+| Watch mode | **Yes** | — | — | — | Daemon | — | — |
+| CI workflow included | **Yes** | — | Rules | — | Yes | — | — |
+| Cycle detection | **Yes** | Yes | Yes | Yes | — | — | — |
+| Zero config | **Yes** | Yes | — | Yes | — | — | **Yes** |
+| Fully local / no telemetry | **Yes** | Yes | Yes | Yes | Partial | Yes | **Yes** |
+| Free & open source | **Yes** | Yes | Yes | Yes | Partial | Archived | No |
 
 ### What makes codegraph different
 
 | | Differentiator | In practice |
 |---|---|---|
 | **🔬** | **Function-level, not just files** | Traces `handleAuth()` → `validateToken()` → `decryptJWT()` and shows 14 callers across 9 files break if `decryptJWT` changes |
-| **🌐** | **Multi-language, one CLI** | JS/TS + Python + Go + Rust + Java + C# + PHP + Ruby + Terraform in a single graph — no juggling Madge, pyan, and cflow |
+| **🌐** | **Multi-language, one CLI** | JS/TS + Python + Go + Rust + Java + C# + PHP + Ruby + HCL in a single graph — no juggling Madge, pyan, and cflow |
 | **🤖** | **AI-agent ready** | Built-in [MCP server](https://modelcontextprotocol.io/) — AI assistants query your graph directly via `codegraph fn <name>` |
 | **💥** | **Git diff impact** | `codegraph diff-impact` shows changed functions, their callers, and full blast radius — ships with a GitHub Actions workflow |
 | **🔒** | **Fully local, zero telemetry** | No accounts, no API keys, no cloud, no data exfiltration — Apache-2.0, free forever |
@@ -88,6 +88,7 @@ Many tools in this space are cloud-based or SaaS — meaning your code leaves yo
 | [Understand](https://scitools.com/) | Deep multi-language static analysis | $100+/month per seat, proprietary, GUI-only, no CI or AI integration |
 | [Snyk Code](https://snyk.io/) | AI-powered security scanning | Cloud-based — code sent to Snyk servers for analysis, not a dependency graph tool |
 | [pyan](https://github.com/Technologicat/pyan) / [cflow](https://www.gnu.org/software/cflow/) | Function-level call graphs | Single-language each (Python / C only), no persistence, no queries |
+| [GitNexus](https://gitnexus.dev/) | Function-level graph with hybrid search and MCP | PolyForm Noncommercial license, no watch mode, no cycle detection, no CI workflow |
 
 ---
 
@@ -228,7 +229,7 @@ codegraph mcp                  # Start MCP server for AI assistants
 | `-j, --json` | Output as JSON |
 | `-v, --verbose` | Enable debug output |
 | `--engine <engine>` | Parser engine: `native`, `wasm`, or `auto` (default: `auto`) |
-| `-k, --kind <kind>` | Filter by kind: `function`, `method`, `class` (search) |
+| `-k, --kind <kind>` | Filter by kind: `function`, `method`, `class`, `struct`, `enum`, `trait`, `record`, `module` (search) |
 | `--file <pattern>` | Filter by file path pattern (search) |
 | `--rrf-k <n>` | RRF smoothing constant for multi-query search (default 60) |
 

ROADMAP.md

@@ -13,7 +13,7 @@ Codegraph is a strong local-first code graph CLI. This roadmap describes planned
 | Phase | Theme | Key Deliverables | Status |
 |-------|-------|-----------------|--------|
 | [**1**](#phase-1--rust-core) | Rust Core | Rust parsing engine via napi-rs, parallel parsing, incremental tree-sitter, JS orchestration layer | **Complete** (v1.3.0) |
-| [**2**](#phase-2--foundation-hardening) | Foundation Hardening | Parser registry, complete MCP, test coverage, enhanced config | **Complete** (v1.4.0) |
+| [**2**](#phase-2--foundation-hardening) | Foundation Hardening | Parser registry, complete MCP, test coverage, enhanced config, multi-repo MCP | **Partial** — core complete (v1.4.0), 2.5 planned |
 | [**3**](#phase-3--intelligent-embeddings) | Intelligent Embeddings | LLM-generated descriptions, hybrid search | Planned |
 | [**4**](#phase-4--natural-language-queries) | Natural Language Queries | `ask` command, conversational sessions | Planned |
 | [**5**](#phase-5--expanded-language-support) | Expanded Language Support | 8 new languages (12 → 20), parser utilities | Planned |
@@ -171,6 +171,20 @@ New configuration options in `.codegraphrc.json`:
 
 **Affected files:** `src/config.js`
 
+### 2.5 — Multi-Repo MCP
+
+Support querying multiple codebases from a single MCP server instance.
+
+- Registry file at `~/.codegraph/registry.json` mapping repo names to their `.codegraph/graph.db` paths
+- Lazy DB connections — only opened when a repo is first queried
+- Add optional `repo` parameter to all MCP tools to target a specific repository
+- Auto-registration: `codegraph build` adds the current project to the registry
+- New CLI commands: `codegraph registry list|add|remove` for manual management
+- Default behavior: when `repo` is omitted, use the local `.codegraph/graph.db` (backwards compatible)
+
+**New files:** `src/registry.js`
+**Affected files:** `src/mcp.js`, `src/cli.js`, `src/builder.js`
+
 ---
 
 ## Phase 3 — Intelligent Embeddings

crates/codegraph-core/src/extractors/csharp.rs

@@ -51,7 +51,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
                 let name = node_text(&name_node, source).to_string();
                 symbols.definitions.push(Definition {
                     name: name.clone(),
-                    kind: "class".to_string(),
+                    kind: "struct".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,
@@ -65,7 +65,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
                 let name = node_text(&name_node, source).to_string();
                 symbols.definitions.push(Definition {
                     name: name.clone(),
-                    kind: "class".to_string(),
+                    kind: "record".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,
@@ -112,7 +112,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
             if let Some(name_node) = node.child_by_field_name("name") {
                 symbols.definitions.push(Definition {
                     name: node_text(&name_node, source).to_string(),
-                    kind: "class".to_string(),
+                    kind: "enum".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,

crates/codegraph-core/src/extractors/go.rs

@@ -76,7 +76,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
                             "struct_type" => {
                                 symbols.definitions.push(Definition {
                                     name,
-                                    kind: "class".to_string(),
+                                    kind: "struct".to_string(),
                                     line: start_line(node),
                                     end_line: Some(end_line(node)),
                                     decorators: None,

crates/codegraph-core/src/extractors/java.rs

@@ -120,7 +120,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
             if let Some(name_node) = node.child_by_field_name("name") {
                 symbols.definitions.push(Definition {
                     name: node_text(&name_node, source).to_string(),
-                    kind: "class".to_string(),
+                    kind: "enum".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,

crates/codegraph-core/src/extractors/php.rs

@@ -131,7 +131,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
             if let Some(name_node) = node.child_by_field_name("name") {
                 symbols.definitions.push(Definition {
                     name: node_text(&name_node, source).to_string(),
-                    kind: "interface".to_string(),
+                    kind: "trait".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,
@@ -143,7 +143,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
             if let Some(name_node) = node.child_by_field_name("name") {
                 symbols.definitions.push(Definition {
                     name: node_text(&name_node, source).to_string(),
-                    kind: "class".to_string(),
+                    kind: "enum".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,

crates/codegraph-core/src/extractors/ruby.rs

@@ -52,7 +52,7 @@ fn walk_node(node: &Node, source: &[u8], symbols: &mut FileSymbols) {
             if let Some(name_node) = node.child_by_field_name("name") {
                 symbols.definitions.push(Definition {
                     name: node_text(&name_node, source).to_string(),
-                    kind: "class".to_string(),
+                    kind: "module".to_string(),
                     line: start_line(node),
                     end_line: Some(end_line(node)),
                     decorators: None,