TraceAct
X-ray vision for Python code.
TraceAct is a lightweight Python package for action-level tracing. It records the full story of what happens when a function runs, including every step taken, resource touched, event recorded, and failure encountered, so you or your agent can understand what actually happened.
Install
pip install traceact
Or from source:
pip install -e .
Quick start
from traceact import traced_action, configure, TraceConfig, JsonlSink
configure(
config=TraceConfig(sink_mode="blocking"),
sinks=[JsonlSink("data/traces.jsonl")],
)
@traced_action(action="note.create", kind="app", actor="user")
def create_note(title, body):
...
Manual tracing
from traceact import ActionTrace
with ActionTrace.start(action="note.create", kind="app") as trace:
trace.input({"title": "Hello"})
trace.step("Validated input")
trace.event(kind="db", operation="insert", target="notes")
trace.output({"note_id": "note_123"})
Concepts
| Concept | Meaning |
|---|---|
Trace |
The full story of one action |
Step |
A human-readable timeline marker |
Event |
A structured operation (db, http, file, model, etc.) |
Touch |
A resource involved in the trace |
Sink |
Where the trace is written |
Requirements
Python 3.9+. No runtime dependencies.
License
MIT
Built by Mo Shehu.
1 maintainer
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