The CLI-vs-MCP debate has covered tools the model already knows. It hasn't covered the harder case: agents needing domain expertise the model lacks. A domain CLI paired with a workflow playbook puts practitioner judgment — the kind the model can't generate on its own — into the agent's loop. The architecture is also a governance question: whose expertise travels through your tool.
WCAG's contrast formula was built for 1999 display calibration, not legibility. Hot pink on near-black scores 6.6:1 and passes — and isn't readable. OKCA closes the gap at the algorithm layer with chroma compression, polarity-aware scaling, and a zero-false-pass invariant — proven on the grey axis and verified across 1,249 production pairs and the sRGB gamut.
A blog advocating for accessible design couldn't pass its own dark-mode contrast audit. The fix wasn't a CSS patch — it was a design system grounded in WCAG compliance, OKLCH color science, and inclusive design.
How I used AI to build an offline transcription app that protects user privacy—and what it reveals about the democratization of software development.
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