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| [LembaGang/headless-oracle-v5](https://github.com/LembaGang/headless-oracle-v5) | Fail-closed market status MCP. Pauses stateful LangGraph agents from entering retry loops during closed markets or DST shifts. | 
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| [pic-standard](https://github.com/madeinplutofabio/pic-standard) | Local-first protocol for provenance & intent verification before agent actions (fail-closed, verifiable evidence). | 
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| [sidclawhq/platform](https://github.com/sidclawhq/platform) | Approval and audit layer for LangGraph agents. Intercepts tool calls, evaluates them against policies, and holds them for human review before execution. Hash-chain audit trail, 13 framework integrations. Apache 2.0. | 
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+| [TrustBoost PII Sanitizer](https://github.com/teodorofodocrispin-cmyk/TrustBoost-PII-Sanitizer) | Context-aware PII sanitization layer for LangGraph pipelines. Redacts emails, national IDs (RFC/CPF/CUIT/RRN), API keys, and financial data before text reaches LLMs. Every paid sanitization anchored on Solana — verifiable at `/verify/{anchor_tx}`. 8 languages, x402 compatible, fail-closed. MIT. | 
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