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The canonical skill lives at https://stockcontext.com/SKILL.md. Point your agent at that URL rather than copying a snapshot that can drift. It is a tight SKILL.md with name and description frontmatter — the portable format across today’s coding agents — teaching the eight HTTP tools, the trust model (verified values, typed refusals, decimal strings, the two clocks), and the output rules.

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Install it

Drop the file into your agent’s skills directory. Paths vary by agent; the constant is “a SKILL.md with name + description.”
Project-scoped under .claude/skills/; use ~/.claude/skills/ for every project.
Directory names vary across agents and versions; the constant is “a SKILL.md with name + description in the skills directory.” If yours expects a different location, move the file there — the content is identical.
The skill describes the eight REST tools and the trust model. Agents that support MCP can use the hosted endpoint at https://stockcontext.com/mcp; agents without MCP can still call each tool over plain HTTP with POST /v1/tools/{name} and the X-API-Key header.

Agent recipes

Once the skill is installed, these show the call sequences it should produce.

Agent instructions

The same rules as a copy-paste system prompt.