blq-cli 1.0.2

Build Log Query - capture and query build/test logs with DuckDB

blq - Build Log Query

BLQ (pronounced "bleak") is a CLI tool that turns build output into a queryable database. blq parses 100+ log formats via duck_hunt into structured events, stores run history with git context, and provides an MCP server for AI agent integration.

Why blq?

Your build fails. You scroll through 500 lines of output looking for the error. blq solves this:

blq run build
# build:3 | exit=1 | 12 errors, 35 warnings

blq errors
# ref       severity  file           line  message
# build:3:1 error     src/parser.c   142   expected ';' before '}'
# build:3:2 error     src/parser.c   156   'node' undeclared

blq inspect build:3:1
# Shows error with source context

Key benefits:

• Structured events — Errors with file:line locations, not raw text
• Run history — Every build stored with git commit, branch, environment
• Comparison — blq diff 4 5 shows what changed between runs
• AI agent tools — MCP server for structured access without log parsing

Installation

pip install blq-cli

Quick Start

cd your-project
blq init --detect                    # Auto-detect build commands

blq run build                        # Run and capture
blq errors                           # See what broke
blq inspect build:3:1                # Drill into specific error
blq diff 4 5                         # Compare runs

Register commands manually if needed:

blq commands register build "make -j8"
blq commands register test "pytest -v"

AI Agent Integration (MCP)

blq mcp install                      # Creates .mcp.json

Agents can then use tools like run, events, inspect, diff to work with structured results instead of parsing raw output. See the MCP Guide.

Commands

Command	Description
blq run <cmd>	Run registered command, capture output
blq errors	Recent errors
blq inspect <ref>	Event details with source context
blq info <ref>	Run details
blq history	Run history
blq diff <r1> <r2>	Compare runs
blq ci check	Check for regressions vs baseline

Event References

Every error gets a reference like build:3:1:

• build — command name
• 3 — run number
• 1 — event within run

Use refs to drill down: blq inspect build:3:1, blq info build:3

Features

Feature	Description
100+ formats	GCC, Clang, pytest, mypy, ESLint, etc. (see duck_hunt
Run history	Every run with git commit, branch, environment
Format detection	Auto-detects format at registration time
CI integration	blq ci check, blq ci comment for PR feedback
MCP server	AI agents query errors without parsing logs
Python API	Programmatic access via LogStore, LogQuery

Documentation

• Getting Started
• MCP Guide — AI agent integration
• Query Guide — Filtering, SQL, output formats
• Integration — CI/CD, hooks, shell completions
• Python API
• Commands Reference

License

MIT