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The home for every agent you run | Learn more →# Devin DesktopEach forward op returns a new `Value` and stashes a local `_backward` closure — the chain rule for that op, pushing the output gradient into its inputs.Now the backward pass itself: topologically order the graph from the output, seed its gradient to 1, and run the stored closures in reverse so each node is fully accumulated before its parents are reached.Sanity-checking the gradients against PyTorch on a small expression with a reused variable, so the accumulation is actually exercised.python -m pytest test_engine.py -qDone — a ~50-line autograd engine, written from scratch. `backward()` topo-sorts the graph and applies each op’s local gradient in reverse, accumulating with `+=` so reused sub-expressions sum correctly. The gradient check matches PyTorch to 1e-6.AgentsDevin CloudDevin LocalCodexClaude AgentOpenCodeCascadefeat/onboarding-flow-designUpdate onboarding API endpointsImprove Unicode normalization### One Space for every agentUse Spaces to share context and Git worktrees across all your agents.### Tab, Tab, ShipSupercomplete predicts your next thought, not just your next edit.## Agents on ACPFast ContextWhere is reconciliation scheduled?### Instant codebase contextFast Context finds the exact files and lines your agent needs—in milliseconds.setFakeTimerMarker sets clock to false instead of resetting itBug FakeTimers.zig:188Test order dependency - first test assumes clean stateInvestigate 25869.test.ts:20-23setFakeTimerMarker silently ignores errorsInformational FakeTimers.zig:179-189Comment at line 185-187 is inconsistent with implementationInformational FakeTimers.zig:185-187### Never miss a detailRapidly (or deeply) review every agent diff—before you push.### Free world-class modelsUnlimited access to SWE-1.6, the fastest coding model in the world.