Developer Builds Structured Codex Workflow with Notion Memory for iOS Projects

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A developer spent the week of March 2026 refining their use of OpenAI's Codex as a more integrated iOS development partner rather than an ad hoc tool. They designed a mini design system in Figma for an app called ToneDrill and had Codex implement a SwiftUI fretboard UI based on those specifications. To reduce repetitive context-setting across chat sessions, they created global and project-level AGENTS.md rule files along with a TaskIndex.md document to manage tasks consistently. They also built a Notion-based 'AI Operating Manual' connected via Notion MCP, allowing Codex to read and update long-term project memory automatically. Custom Skills were registered to streamline session start and end routines, enabling Codex to begin each session with full project context and log key learnings afterward.

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ProgrammingDEV Community ·

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ProgrammingHacker News ·

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