
Spec-Driven Development in 2026: the spec as source of truth for AI-assisted coding
Make the specification the primary artifact: spec → plan → agent code → verify, 2026 tools, vs TDD/BDD, and where SDD breaks.
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Make the specification the primary artifact: spec → plan → agent code → verify, 2026 tools, vs TDD/BDD, and where SDD breaks.

Evolution of IDEs and AI tool internals: LSP, repo indexing, context assembly, Tab/Chat/Agent modes, MCP, and comparison of Cursor, Copilot, JetBrains, CLI agents — what happens to code under the hood in 2026.

A feature is an investment that does not end at release. How to account for build, verification, support, and failure cost — and why you should test in proportion to blast radius, not coverage percentage.