Deterministic, local-only audit reports for Claude Code AI agent sessions. Rust + SQLite. Zero network calls. MCP server for agents.
BAR Observatory — Deterministic Audit Reports for Claude Code AI Agent Sessions
BAR Observatory (Base Agentic Reporter) is a free, open-source, local-only flight recorder and audit tool for Claude Code sessions. It reads what your AI coding agent actually did — every tool call, task, sub-agent dispatch, rework loop, and error — stores it in a local SQLite database, and renders a deterministic report in JSON, HTML, and Markdown. Same database in, byte-identical report out, every time. No LLM in the render path. No network calls. No API key. No account. (The optional bar interpret command is the one exception — it uses your own Claude Code session to write a plain-English summary. The deterministic report never depends on it and never calls a model itself.)
Don't ask the agent what happened. Check the record.
TL;DR — If you've ever finished a long Claude Code session and thought "what did it actually do in there, and can I prove it?", run one command against the transcript you already have on disk and get a report you can attach to a PR, hand to a reviewer, keep as part of your own review process, or let another AI agent query directly. You do not need to clone or build this repository to do any of that — see Zero-SDK, zero-clone below.
New to command lines? This page covers everything in depth, including some technical detail meant for engineers evaluating the tool. If you'd rather follow a slower, plain-language, click-along guide with no assumed background — including how to open a terminal in the first place — start with the plain-language guide instead, then come bac
From the project README.
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