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Class the Shrunk Witness Before a Property Failure Can Be Frozen
1+ hour, 19+ min ago (1384+ words) A property failure is not a flake freeze. It becomes eligible for a freeze only after the input is shrunk, retained, replayed on a pinned fixture, and classed as unstable rather than consistently wrong. A witness that fails on every…...
Pin the Fixture, Not the Vendor: A Take-Home for Swap-Safe Eval Runners
2+ hour, 11+ min ago (662+ words) The prompt should stay on one page and should name files rather than a preferred brand. Candidates receive the six constraints below, together with a written note that any live call stays optional. A missing key must skip the network…...
C++ Abstract Classes and Interfaces: Build a Usable Storage Contract
14+ hour, 26+ min ago (798+ words) Build a C++17 ScoreStore interface, swap vector and hash-backed implementations behind it, and verify both with the same runnable contract test. Exam prep & CS education C++ has no interface keyword. A class is abstract when it has at least one…...
Canary Fixture Binding With Identity Failure Classes and a Halt Gate
3+ hour, 58+ min ago (1202+ words) Last Tuesday I replayed an agent evaluation that was supposed to remain inside one synthetic lab scope. The third tool call departed carrying a hostname that I had never written into the fixture contract. The planner had already consumed a…...
agent-guard 0.7: the legit-test-change escape hatch
8+ hour, 13+ min ago (210+ words) You asked, I built it. In the comments on the last agent-guard post, Coldboot asked the uncomfortable question: "how does the guard know a test change is legitimate?" Updating a snapshot, fixing a flaky timing test, adding a fixture — the…...
Designing Deterministic Value Resolution for Competing Gameplay Systems in Unreal Engine
8+ hour, 25+ min ago (1098+ words) This origin shaped VRS's scope: its subject is not a particular effect, such as a buff, but the interaction between systems that influence the same gameplay value. Consider a character whose movement speed depends on equipment, terrain, and scripted restrictions....
Coding agents keep "fixing" tests by editing them, so I made it impossible
11+ hour, 31+ min ago (277+ words) If you use coding agents you've seen this one. A test fails, the agent can't find the bug, so it flips the expected value, loosens the assert, or mocks the whole thing out. Green check. Broken code. I run a…...
Domain, Assertions, Fixture Hash: Gate Agent Patches on Strength
11+ hour, 35+ min ago (1390+ words) An agent patch that shrinks a property domain, drops an assertion, swaps out a case, or replaces a fixture hash has weakened the test. That delta is a review failure. It is not intermittent, and it is not eligible for…...
Changed Symbols Earn Property Credit, or the Agent Patch Stays Closed
15+ hour, 9+ min ago (1373+ words) An agent patch does not merge because the job is green. It merges when every changed symbol carries property credit, every fixture hash matches the lock, and every flake freeze contributes zero. CI collapses three unlike signals into one bit....
Hardpoint STL
15+ hour, 28+ min ago (394+ words) An ordinary binary.stl that also remembers which CAD face each triangle came from, what kind of surface that face is, and where its corners are. Slicers read it as a normal STL. A mesh-to-CAD converter that knows the format…...