We split this copilot-instructions.md into the rules it gives an agent

6 rules. About 0 are common, 6 are distinctive, and 0 are very specific to this project.

• ≈0

  Common · estimate

  Many files like this have a rule of this kind.

• ≈6

  Distinctive · estimate

  This author's own choices. Worth a look.

• 0

  Very specific

  Tied to their project's names, files or tools. Probably skip.

• Common
• Distinctive
• Very specific

1. Distinctive:

   Keep the service in CommonJS JavaScript with Express.

   line 14
2. Distinctive:

   Keep decision state in memory and scoped to one app instance.

   line 16
3. Distinctive:

   Do not add dependencies or endpoints outside the challenge brief.

   line 17
4. Distinctive:

   Use synthetic records. Do not connect to a remote service or persistent store.

   line 18
5. Distinctive:

   Test observable HTTP behavior with Jest and Supertest.

   line 23
6. Distinctive:

   Treat learner-provided strings as untrusted input.

   line 25

≈ “Common” is an estimate: at least 1 in 5 of the 3,669 Copilot instructions files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

• Where files are headingNew Copilot instructions files have more rules about branches and pull requests, and fewer about code style.

  Of the Copilot instructions files we read, the 2,297 first seen in the last six months, against the older ones: the kind of rule that gained most share, and the kind that lost most. About files like this in general, not this one, and an estimate, since a kind is a pattern in the words.

• In this repository24 other files it gives its agents.

  • AGENTS.mdAGENTS.md
  • sessions/session-m2-03-spaces-and-context/lab/solution/ecommerce-project/.github/copilot-instructions.mdCopilot instructions
  • sessions/session-m2-03-spaces-and-context/lab/solution/instructions-lab/.github/copilot-instructions.mdCopilot instructions
  • sessions/session-m3-02-cloud-agent/lab/starter/copilot-instructions.mdCopilot instructions
  • baoyu-infographicSkill
  • diagram-creatorSkill
  • docxSkill
  • excalidraw-diagramSkill
  • humanize-contentSkill
  • impeccableSkill
  • pdfSkill
  • pptxSkill
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  • skill-creatorSkill
  • xlsxSkill
  • impeccableSkill
  • session-format-validatorSkill
  • deploymentSkill
  • api-designSkill
  • grillingSkill
  • grill-meSkill
  • deploymentSkill
  • replace-with-directory-nameSkill
  • decision-interviewSkill