Sample
Observe greenlet switch and throw event dispatching via settrace and trace listener inspection with gettrace
sha256:795a164df50449bb69f2824379f55d7e9854b07000a3fb2e948d2f9a301db772
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 1
- Signing keys that built it
- 1
Declared environment
linux 24 · ubuntu · glibc 2.39 x64 pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1python:3.12-alpine@sha256:d09d15e60962… |
2026-08-28 |
Case
HOW- Goal
- Observe greenlet switch and throw event dispatching via settrace and trace listener inspection with gettrace
- Packages
- Symbols
-
- greenlet.getcurrent
- greenlet.gettrace
- greenlet.greenlet
- greenlet.settrace
- Created
- 2026-08-28T03:43:14Z
Contract
- greenlet.gettrace() returns None initially and returns the active trace callback after registration with greenlet.settrace().
- greenlet.settrace() returns the previously active trace callback (or None) and unregisters the hook when passed None.
- A coroutine switch via greenlet.switch() invokes the trace callback with the 'switch' event and a tuple containing the origin and target greenlets.
- Dispatching an exception into a suspended greenlet via greenlet.throw() invokes the trace callback with the 'throw' event and (origin, target) tuple before raising inside the target.
- greenlet.getcurrent() evaluated inside the trace callback returns the target greenlet rather than the origin greenlet.
- An exception raised inside the trace callback aborts the switch and propagates out to the caller.
Files
- NOTES.md
- PROMPT.md
- csx.json
- requirements.txt
- spec.json
- test/contract.py
Origin Seeder
anonymous