Developer Uses Shared Markdown File to Coordinate Multiple Parallel AI Coding Sessions

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A solo developer running multiple simultaneous Claude Code sessions discovered that parallel AI agents had no awareness of each other's work, leading to near-deletion of active branches and merge conflicts. To fix this, he created a single shared markdown file — a 'blackboard' — that every session reads and writes to track task status and file ownership. Sessions must claim a task before starting it, and stale claims older than seven days can be reclaimed after verifying the branch's actual state via Git. The approach mirrors established computer science concepts such as the Blackboard pattern from the 1970s, stigmergy, and Kanban-style task management. The developer concludes that the real bottleneck in AI-assisted solo development is not compute parallelism but the absence of a persistent, shared context across sessions.

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