Anthropic's announcement of Fable 5.1 and Mythos 5.1 — one base model, two guardrail postures.
- official
- models
- announcement
- fable
Anthropic Engineering Blog
Anthropic's engineering blog — how Claude Code, agents, and harnesses are actually built.
Anthropic's official engineering blog, publishing first-party deep dives on building with and for Claude: agent harness design for long-running development, Claude Code's auto mode, scaling managed agents, and similar practitioner-grade posts. The primary source for Anthropic engineering thinking beyond product docs.
Charted
Related on the map
Anthropic's canonical essay on agent design — workflows vs agents, and five composable patterns.
- official
- agents
- engineering
- patterns
12-Factor Agents
GuideHumanLayer's 12 design principles for production-grade LLM agents — the closest thing to a 'best practices' manifesto.
- agents
- best-practices
- production
- principles