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Public story · 2026-02-21 · source-backed
Anthropic: Prompt Caching as Production Architecture — The most significant engineering disclosure from Anthropic this year. Claude Code's static-first prefix structure, Plan Mode as callable functions, Tool Search with defer_loading, and compaction maintaining identical system prompts — all designed around caching economics. The key insight: at $0.30/M vs $3.00/M for cached vs uncached reads, caching isn't optimization — it's the business model.
Bargury: "Agent Compromised by Agent to Deploy Agent" — The definitive Clinejection post-mortem. Full attack chain analysis, timeline, and the framing that will define this attack class. Essential reading for anyone with AI bots in CI/CD pipelines.
Praetorian: MCP Server Security — The Hidden AI Attack Surface — Practical MCP security assessment with server chaining demonstrations and the critical uvx typosquatting discovery. Accompanied by the MCPHammer open-source testing tool.
Edward Donner: "AI Coder: Vibe Coder to Agentic Engineer" — The best structured learning resource for the vibe-to-agentic transition. 3-week course covering Claude Code deeply (slash commands, checkpoints, MCP, skills, plugins, Ralph Loops) alongside Copilot, Cursor, Codex. Teaches the PEV loop (Plan, Execute, Verify) as canonical workflow.
Each link below shares sources, entities, or timing with this story.
Codex competes with Claude Code / Shared entities / Same source domain / Shared topic / What happened next / Tension
Linked by a graph relationship (Codex competes with Claude Code); both cover Agent, Anthropic, Claude Code, Codex; reported by the same outlet (implicator.ai).
Simon Willison uses Claude Code / Shared entities / Same source / Shared topic
Linked by a graph relationship (Simon Willison uses Claude Code); both cover Anthropic, Claude Code, Plan Mode, Tool Search; cite the same source (Anthropic: Prompt Caching as Production Architecture).
Codex competes with Claude Code / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Codex competes with Claude Code); both cover Anthropic, Claude Code, Codex, Copilot; overlapping topics (anthropic, claude, code).
Boris Cherny uses Claude Code / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Boris Cherny uses Claude Code); both cover Anthropic, Claude Code, Execute, PEV; overlapping topics (anthropic, claude, plan).
Claude Code competes with Cursor / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Claude Code competes with Cursor); both cover Anthropic, Claude Code, Copilot, Cursor; overlapping topics (anthropic, claude, code, tool).
Codex competes with Claude Code / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Codex competes with Claude Code); both cover Agent, Claude Code, Codex, Cursor; overlapping topics (claude, code, tool).
Claude Code uses MCP / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Claude Code uses MCP); both cover Claude Code, Codex, Copilot, Cursor; overlapping topics (claude, code, tool).
Anthropic released Claude Code / Shared entities / Shared topic / What happened next
Linked by a graph relationship (Anthropic released Claude Code); both cover Anthropic, Claude Code, Copilot, Cursor; overlapping topics (anthropic, claude, code).