Dev discovers Coder Agents has two separate, non-overlapping skill systems

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A developer building reusable agent skills for Coder Agents found that placing a skill file in the filesystem directory did not make it appear in the chat's slash-command menu. After cloning the Coder source code to investigate, they discovered the platform maintains two entirely distinct skill systems: personal skills stored in a database and accessible via the slash menu, and workspace skills discovered from the filesystem that the AI model loads autonomously. The two systems do not overlap, meaning filesystem-based skills are invisible to the slash-command interface by design. The developer had originally set out to automate repetitive tasks — including agent session handoffs during context-window compaction and SSH workspace setup — by writing reusable skill files. Understanding the architectural split between the two systems resolved the confusion and clarified the correct approach for each use case.

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