assurance

Your AI agent says it's done. Assurance tells you what it didn't check.

uvx assurance audit          # in a project where you've used Claude Code
uvx assurance audit --demo   # or see a report on a bundled sample session

No uvx? Install uv (brew install uv, or curl -LsSf https://astral.sh/uv/install.sh | sh, or pipx install uv), or use pip install assurance and run assurance audit.

Real output on the bundled sample. The agent was asked to fix a rounding bug in invoice.py "and make sure pytest -q tests/test_invoice.py passes", and ended with "All done — the totals are correct now."

Claude Code session demo-8f2 — 13 min in /home/you/my-app
10 tool calls, 3 failed — Bash 6, Edit 2, Grep 1, Read 1

  Looped: 3 rounds of Bash `pytest -q tests/test_invoice.py` failing the same way, with nothing new read
  After the last edit (14:09): no test or check it recognises; 2 unclassified commands ran after it (make lint-fix, python script)
  Against the last prompt (14:00, "The invoice totals are off by a cent for EUR. Fix it in inv…"):
    invoice.py: changed at 14:04 (src/billing/invoice.py).
    pytest -q tests/test_invoice.py: did not run after the last edit to src/billing/rates.py (14:09); it last failed at 14:08, before that.
    Only what the last prompt names is checked here; whether the work does what it asks is not.
  Not classified: 2 shell commands (make lint-fix, python script), so whether they read, wrote or tested anything is unknown.
  Also in the transcript: 1 assistant turn, 1 user turn, 1 bookkeeping record.
  Not read: 0 lines.

Run it after every session. When Claude finishes without testing its last edit, you're told, and Claude is sent back to run the tests. assurance hook install adds the Stop hook after showing you the change, and assurance hook remove takes it out again. Run that one yourself: in auto mode, Claude Code refuses to let Claude remove the hook, as tampering with an audit.

uvx assurance@latest hook install    # --scope project to share it with everyone on the repository
uvx assurance hook remove

Or as a Claude Code plugin, which also adds /assurance:audit for the whole report in a session:

claude plugin marketplace add i-ops-hq/assurance
claude plugin install assurance@i-ops-hq

Or add it to ~/.claude/settings.json yourself:

{ "hooks": { "Stop": [ { "hooks": [ { "type": "command", "command": "uvx --offline assurance@0.1.19 audit --hook --nudge" } ] } ] } }

Run uvx assurance@0.1.19 --version once first: --offline runs the copy uv already has, so the hook never waits on PyPI.

Every command

Nothing here consults a model, opens the network, or reports a check it could not run as a pass.

This package contains no code of its own. It installs assurance-cli, assurance-deps, assurance-budget and assurance-authority, each of which also installs on its own. The MCP server is separate: pip install assurance-mcp.

Source, issues and documentation: https://github.com/i-ops-hq/assurance · Apache-2.0.