Glance

Open large files (JSONL, CSV, logs 3GB+) without crashing or lag — lightweight Rust daemon with a developer CLI and IDE extension support.

Status: Early development. Core daemon and VS Code extension work. Zed extension is experimental.

Quick start

cargo build --release

glance info /data/events.jsonl
glance read /data/events.jsonl --limit 50
glance search /data/events.jsonl "error"
glance validate /data/events.jsonl

Supported formats

Extension	Format
.jsonl, .ndjson	JSONL / Newline-delimited JSON
.csv, .tsv	Delimited text
.log, anything else	Raw text

Format is detected by extension + first-line sniff.

Documentation

Doc	Description
docs/cli.md	All CLI subcommands and flags
docs/daemon.md	JSON-RPC protocol for IDE extensions
docs/extensions.md	VS Code and Zed extension setup
docs/security.md	Security model and known limitations
CONTRIBUTING.md	How to contribute
CHANGELOG.md	Version history

Project structure

glance/
├── src/
│   ├── cli/        developer CLI subcommands
│   ├── reader/     file reading, search, CSV, pretty-print
│   ├── index/      line index + disk cache
│   ├── server/     JSON-RPC daemon
│   ├── protocol/   request/response types
│   └── security.rs path validation
├── docs/           detailed documentation
├── tests/          140 integration tests
└── extensions/
    ├── vscode/     VS Code extension
    └── zed/        Zed extension (WASM)

Testing

cargo test   # 140 tests across 11 suites

Roadmap

• JetBrains plugin (Kotlin)
• Deduplicate file handles
• Configurable cache directory (GLANCE_CACHE_DIR) — v0.3.1
• Context lines for search results (--before/--after params) — v0.3.0