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Docker basics

Skill planifest/planifest-framework/planifest-framework/external-skills/docker-basics

Design and review container runtime basics for reproducible local/service execution using Docker. Use when container build/run behavior, networking, volumes, and runtime isolation need explicit decisions; do not use for API contract or requirement prioritization tasks.From its SKILL.md

Install
npx -y skills add planifest/planifest-framework --skill docker-basics

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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SKILL.md

2.2 KB, 387 tokens by cl100k_base, as published. Nobody here has run it

Docker Basics

Overview

Use this skill to ensure containerized workloads are reproducible, debuggable, and operationally safe.

Scope Boundaries

  • Use this skill when the task matches the trigger condition described in description.
  • Do not use this skill when the primary task falls outside this skill's domain.

Shared References

  • Runtime risk catalog:
    • references/docker-runtime-risk-catalog.md

Templates And Assets

  • Runtime contract template:
    • assets/container-runtime-contract-template.md
  • Runtime checklist:
    • assets/docker-runtime-checklist.md

Inputs To Gather

  • Application runtime requirements and dependencies.
  • Local/dev/prod run differences.
  • Required network ports, volumes, and environment variables.
  • Security constraints (user, capabilities, filesystem access).

Deliverables

  • Container run policy (entrypoint, env, ports, volumes, user).
  • Local reproducibility checklist.
  • Runtime risk list (permissions, secrets, mutable state).
  • Verification steps for startup and health checks.

Quick Example

  • Run as non-root user.
  • Mount only required volume paths.
  • Fail fast if required env vars are missing.
  • Expose health endpoint and readiness check.

Quality Standard

  • Runtime config is minimal and explicit.
  • Container behavior is reproducible across environments.
  • Security posture follows least-privilege defaults.
  • Health and failure signals are observable.

Workflow

  1. Define container runtime contract using assets/container-runtime-contract-template.md.
  2. Configure networking, storage, and environment boundaries.
  3. Validate startup/health behavior.
  4. Verify security constraints and secret handling using assets/docker-runtime-checklist.md.
  5. Document reproducible run commands.

Failure Conditions

  • Stop when required runtime dependencies are implicit.
  • Stop when container requires unnecessary privileged execution.
  • Escalate when runtime differences make behavior non-reproducible.

What ships with it: 1 file

11.3 KB alongside SKILL.md

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