code-index-mcp

Self-hosted hybrid code search as an MCP server for Kilo CLI / OpenCode. Everything runs locally on your machine — no third-party MCP servers, no LSP, no SaaS.

Three search layers, one server:

Layer	Engine	Good for
text	SQLite FTS5	exact strings, identifiers, config keys, errors
symbols	tree-sitter	"where is X defined", file outline
semantic	fastembed (local) → Qdrant	fuzzy "where do we do Y"

Don't want to configure this yourself? Let your agent do it

You don't need to learn the env vars, registry file, or Qdrant. Just tell your coding agent (Kilo CLI / OpenCode) to set it up from the runbook:

"Set up code-index for me, following the instructions at https://github.com/Krat12/mcp-code-index/blob/main/docs/AGENT_SETUP.md"

The agent reads docs/AGENT_SETUP.md, checks your environment, asks you only the few things it can't decide (which repos, your embeddings API key, what to ignore), wires everything up, builds the index, and tells you where everything lives — without writing anything into your repos. The rest of this README is the manual reference for those who prefer to do it by hand.

Requirements

• Python 3.10+
• Qdrant running locally (you already have it) at http://localhost:6333
• The rest is pip-installed (tree-sitter grammars + fastembed are local; the embedding model downloads once and then runs offline).

Install

# from the project folder
uv venv
uv pip install -e .
# or: pip install -e .

Nothing is written into your repos

All state lives outside the indexed repositories:

• SQLite index → ~/.cache/code-index/<service-id>.sqlite3
• Qdrant collection → code_<service-id> (derived from the repo's absolute path)
• Project registry → ~/.config/code-index/projects.toml

So you never commit anything, never edit .gitignore, and never add git hooks inside the service repos — no PR noise.

Single project

code-index index            # incremental index of CWD (or --path DIR)
code-index index --full     # full rebuild
code-index stats

Microservices (many repos)

Register services in the external registry (no files in the repos):

# Register each service explicitly...
code-index add C:\work\billing  --name billing
code-index add C:\work\payments --name payments

# ...or point at a parent folder and auto-discover every git repo inside:
code-index add-workspace C:\work --depth 1

code-index list             # show resolved services
code-index index-all        # (re)index every service (per-service index)
code-index stats-all

The registry file (~/.config/code-index/projects.toml) looks like:

[[service]]
name = "billing"
path = "C:/work/billing"

[[workspace]]
path = "C:/work"
depth = 1

Per-project ignore (no files in the repo)

Each [[service]] (and [[workspace]]) can declare what to skip — all in the external registry, so nothing is written into the service repo:

[[service]]
name = "billing"
path = "C:/work/billing"
ignore = ["**/generated/**", "*.pb.go", "docs/legacy/**"]  # extra ignore globs
use_gitignore = true   # ALSO skip whatever the repo-root .gitignore lists

• ignore is a list of glob patterns matched against repo-relative POSIX paths. Supported glob/.gitignore-like syntax: * (no /), ** (any depth), ?, a trailing / (directories only), and a leading/embedded / (anchored to the repo root). These are layered on top of the built-in ignores (build dirs, lock files, minified bundles, etc.).
• use_gitignore = true additionally reads the repo's top-level .gitignore (read-only — never written). Negation rules (!pattern) and nested per-directory .gitignore files are intentionally not supported, to keep the matcher tiny and predictable.
• For a [[workspace]], ignore/use_gitignore are inherited by every auto-discovered repo under it.

Watch indexing progress

code-index index            # shows a live rich progress bar (TTY)
code-index index --plain    # plain stderr logging instead
code-index status           # one-shot table: phase / progress / files / symbols
code-index status --watch   # live dashboard, refreshes ~1/s (Ctrl+C to stop)
code-index web              # tiny local web dashboard at http://127.0.0.1:8765
code-index web --port 9000  # pick another port

Progress is shared across processes via tiny JSON files in ~/.cache/code-index/status/<id>.json (atomic writes). So you can run code-index status --watch (or open the web page) in one terminal and watch the background code-index-watch daemon — or an index-all running elsewhere — make progress in real time. The web UI is opt-in (started only by code-index web), single-threaded, and does work only when the browser polls — deliberately light for a low-power machine.

Auto re-index (no git hooks)

A background daemon keeps every registered service fresh using filesystem events (watchdog) plus a periodic safety sweep — all outside the repos:

code-index-watch                 # FS events + sweep every 600s
code-index-watch --interval 300  # sweep every 5 min
code-index-watch --no-periodic   # FS events only

Leave it running (e.g. as a startup task / Windows service). It does an initial incremental index of each service, then re-indexes only what changes.

Wire it into Kilo CLI / OpenCode

Add a local MCP server to your config (~/.config/kilo/opencode.json for Kilo CLI, or ~/.config/opencode/opencode.json for OpenCode; a per-project opencode.json works too):

One MCP server can serve all your microservices — the agent picks the service per call (or uses the default CWD service). Put this in the global config (~/.config/kilo/opencode.json for Kilo, ~/.config/opencode/opencode.json for OpenCode):

{
  "$schema": "https://app.kilo.ai/config.json",
  "mcp": {
    "code-index": {
      "type": "local",
      "command": ["code-index-mcp"],
      "enabled": true,
      "environment": {
        "CODE_INDEX_ROOT": "${cwd}",
        "QDRANT_URL": "http://localhost:6333",
        "CODE_INDEX_EMBED_MODEL": "BAAI/bge-small-en-v1.5",
        "CODE_INDEX_SEMANTIC": "1"
      }
    }
  }
}

If code-index-mcp isn't on PATH, use the absolute path to the venv script, e.g. ["C:/Users/you/PycharmProjects/code-index-mcp/.venv/Scripts/code-index-mcp.exe"], or ["python", "-m", "code_index.server"] with the venv's python.

Restart the CLI. The agent now sees tools: search_text, search_symbol, file_symbols, read_span, search_semantic, search_hybrid, list_services, reindex, index_stats. Every search tool takes an optional service (name or id from list_services).

• read_span(path, start_line, end_line, context=0, service=...) returns the actual source at a location — the natural follow-up to a search hit, so the agent can read code without a separate file tool (path is confined to the repo; falls back to the index if the file changed/vanished on disk).
• search_text/search_symbol/search_semantic/search_hybrid accept path_glob and exclude_glob (globs, comma-separated or a list) to narrow results by repo-relative path, e.g. path_glob="backend/**", exclude_glob="**/tests/**". search_text also degrades gracefully on malformed FTS5 input (it retries the query as a literal phrase).

Keeping the index fresh

• Background daemon (recommended): code-index-watch (see above).
• On demand from the agent: it can call the reindex tool.
• Manual: code-index index / code-index index-all.
• At server start: set CODE_INDEX_REINDEX_ON_START=1 for a quick background incremental of the default service when the MCP server launches.

Environment variables

Var	Default	Meaning
CODE_INDEX_ROOT	.	default project root (single-project / fallback)
CODE_INDEX_CONFIG_HOME	~/.config/code-index	where projects.toml lives
CODE_INDEX_CACHE_HOME	~/.cache/code-index	where SQLite indexes live
QDRANT_URL	http://localhost:6333	Qdrant endpoint
QDRANT_API_KEY	–	optional Qdrant key
CODE_INDEX_EMBED_MODEL	BAAI/bge-small-en-v1.5	fastembed model
CODE_INDEX_SEMANTIC	1	set 0 to disable semantic layer
CODE_INDEX_REINDEX_ON_START	0	1 = background reindex on server start

Live indexing status is written to ~/.cache/code-index/status/<id>.json (under CODE_INDEX_CACHE_HOME). Inspect it with code-index status / code-index status --watch, or the code-index web dashboard.

Graceful degradation

• No tree-sitter? → symbols layer off, text + semantic still work.
• Qdrant down / fastembed missing? → semantic off, text + symbols still work.
• The text (FTS5) layer always works as long as the SQLite index exists.

Degradation is visible, not silent:

• index_stats reports the semantic layer's health: ok (points=N), disabled (turned off), or unavailable (API/Qdrant unreachable).
• search_semantic / search_hybrid distinguish disabled vs unavailable vs "no matches", so the agent knows to fall back to text/symbols instead of treating a down layer as an empty result.
• Indexing counts what it couldn't store — chunks that failed to embed and vectors that failed to upsert — and surfaces the totals in the run log, in status.json, and in the status / web dashboards (a ⚠ marker).