sd0x-dev-flow
PluginHarness layer for Claude Code with hook-enforced dual review, state-machine gates that survive context compaction, and fail-closed safety.
/plugin marketplace add sd0xdev/sd0x-dev-flowThe harness layer for Claude Code.
Quality gates that AI can't skip. A reference implementation of AI Agent Harness Engineering for Claude Code — hook-enforced dual review, state-machine gates that survive context compaction, and fail-closed safety where it counts.
Harness engineering is the discipline of engineering everything around the LLM — tool loops, context management, hooks, state machines, safety layers — as opposed to training the model itself. Mitchell Hashimoto coined the term in Feb 2026; Anthropic engineering and Martin Fowler have published on it; arXiv 2603.05344 formalizes it.
sd0x-dev-flow is a reference implementation. Each row below maps a canonical harness sub-problem to concrete code you can study:
architecture-designerbrief-writercode-simplifiercodex-architectcodex-implementercoverage-analystdoc-refactorfeasibility-analystgit-investigatorperformance-optimizerrefactor-reviewersolution-architectstrict-reviewertech-spec-reviewerverify-apparchitectureaskbest-practicesbug-fixbump-versioncheck-coverageclaude-healthcode-explorecode-investigatecodex-architectcodex-brainstormcodex-cli-reviewcodex-code-reviewcodex-explaincodex-implementcodex-review-branchcodex-review-doccodex-review-fastcodex-reviewcodex-securitycodex-setupcodex-test-gencodex-test-reviewcontract-decode+72 more- Source
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