The request names "pdac", which none of the candidate sources identifies as a product or describes as a knowledge agent, so I cannot tell what it refers to. The products below are general knowledge-base and project-memory tools for AI agents that do the closest matching job, but none is confirmed as the PDAC product.
A question back: What is PDAC: a specific product, a company or a project name? Knowing that would let me name the exact tool.
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Quelvioquelvio.comverified and signed
Turns documents and agent sessions into sourced facts and answers questions with cited quotes via query_knowledge 818.
official:MCP server · com.quelvio/mcp-server+2 community tools built for it
for agents: query_knowledge · list_domains · get_source_detail
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Knownbaseknownbase.devwebsite read, tools not yet checked
Gives Claude Code, Codex and MCP agents persistent, searchable project memory via an MCP endpoint 7.
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Unified Product Graphunifiedproductgraph.orgwebsite read, tools not yet checked
An open specification that structures product knowledge into typed, queryable data for MCP-capable agents 10.
Sources
- 3Hivebook - The Knowledge Base for AI Agentshivebook.wiki · read 2026-10-29
- 5ProjectBrain — Persistent memory for AI agentsprojectbrain.tools · read 2026-10-29
- 7Knownbase: Persistent Project Memory for AI Coding Agentsknownbase.dev · read 2026-10-29
- 8Quelvio · No confident lies.quelvio.com · read 2026-10-29
- 10Unified Product Graph: Open specification for product knowledgeunifiedproductgraph.org · read 2026-10-29
- 15projectbrain-mcp: declares "knowledge" (the record we read and signed)unfragile.ai · read 2026-10-24
- 18Quelvio: declares "query_knowledge" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
acquire-codebase-knowledge · acquire-codebase-knowledge verified and signed
Use this skill when the user explicitly asks to map, document, or onboard into an existing codebase. Trigger for prompts like "map this codebase", "document this architecture", "onboard me to this repo", or "create codebase docs". Do not trigger for routine feature implementation, bug fixes, or narr
· IWE website read, tools not yet checked
A Markdown knowledge base you and your AI agent work on together. Use the iWe Mac app with Claude Code or Codex inside, or your editor and the same tools.
· Hivebook website read, tools not yet checked
A collaborative wiki written by AI agents, for AI agents. Humans can read; only agents can write.
agents · agno verified and signed
knowledge · projectbrain-mcp verified and signed
Decision/fact/skill operations
· 0dai website read, tools not yet checked
7 terminal CLIs + Cursor MCP bridge, one shared project memory. Decisions stick, mistakes stay flagged, no more re-explaining the codebase.
· Knownbase website read, tools not yet checked
Stop re-explaining your codebase to AI. Knownbase gives Claude Code, Codex and MCP agents persistent project memory that survives every session.
query_knowledge · Quelvio verified and signed
Search the company's connected knowledge across every source — Drive, SharePoint, Confluence, Slack, Notion — with cited synthesized answers, lifecycle awareness, and refusal-on-weak-context. Returns a written answer with [n] citations plus the ranked source chunks. Modes: `fast` (1,500 kT — retriev
AssociateAgentKnowledgeBase · Agents for Amazon Bedrock verified and signed
Associates a knowledge base with an agent.
· Unifiedproductgraph website read, tools not yet checked
An open specification that structures product knowledge into typed, connected, queryable data. 324 entity types across 37 domains. MIT licensed. Works with Claude Code, Cursor, and any MCP tool.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.