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CF apply-anthropic-skill-best-practices

Comprehensive guide for skill development based on Anthropic's official best practices - use for complex skills requiring detailed structure

NeoLabHQ/context-engineering-kit Claude Code author: NeoLabHQ 1 file body ≈ 10 488 tokens Open the sourcegithub.com↗ analyzed 4 d ago

Comprehensive guide for skill development based on Anthropic's official best practices - use for complex skills requiring detailed structure

As a process F 31/100 · No process to follow — References files that are not bundled: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, FORMS.md

ProcedureWordExcelPDFAI and agentstype and topics are labelled automatically from the skill text
Runs in: Claude / Claude Code ChatGPT / Codex Gemini CLI Cursor GitHub Copilot / VS Code Qwen Code Kimi Code CLI Z.ai (GLM) DeepSeek (Deep Code) Mistral Vibe LangChain (deepagents) OpenClaw Goose OpenCode
JSON
Technical rating
C
86/100
safety, quality, tests
Safety 60%
100
Quality 40%
65
Run on models
none yet
Process rating
F
31/100
No process to follow
References files that are not bundled: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, FORMS.md
Tools and files w 18
0
Inputs and preconditions w 11
0
Failures and branches w 10
0
the three weakest of ten parameters · all ten
This is a copy of a skill from another catalog; the rating counts the canonical one: apply-anthropic-skill-best-practices (Lord1Egypt/RA-Skills)

How to improve

  1. The SKILL.md body is over 5,000 tokens: move reference detail into references/ and load it when needed.
  2. The text references files that are not there: add them or drop the references.
For the model run — optional
  • Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
  • A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.

Guard findings · 0

✓ No critical or high findings

Files scanned: 1. Evidence is masked. Grey chips explain why severity was lowered.

Against the Agent Skills spec

  • warning body-long SKILL.md body ≈ 10488 tokens (recommended < 5000); move details to references/
  • warning missing-ref reference to a missing file: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview
  • warning missing-ref reference to a missing file: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview
  • warning missing-ref reference to a missing file: FORMS.md
  • warning missing-ref reference to a missing file: REFERENCE.md
  • warning missing-ref reference to a missing file: EXAMPLES.md
  • warning missing-ref reference to a missing file: reference/finance.md
  • warning missing-ref reference to a missing file: reference/sales.md
  • warning missing-ref reference to a missing file: reference/product.md
  • warning missing-ref reference to a missing file: reference/marketing.md
  • warning missing-ref reference to a missing file: DOCX-JS.md
  • warning missing-ref reference to a missing file: REDLINING.md
  • warning missing-ref reference to a missing file: OOXML.md
  • warning missing-ref reference to a missing file: advanced.md
  • warning missing-ref reference to a missing file: details.md
  • warning missing-ref reference to a missing file: reference.md
  • warning missing-ref reference to a missing file: examples.md
  • warning missing-ref reference to a missing file: docs.claude.com/en/docs/agents-and-tools/tool-use/code-execution-tool
  • warning missing-ref reference to a missing file: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview
  • warning missing-ref reference to a missing file: scripts/helper.py
  • note edit-residue the text marks something as outdated (lines 452): check that old rules are not kept next to new ones — the full check reads the text for contradictions

Process rating: all ten parameters 31/100

Will not run. References files that are not bundled: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, FORMS.md
  • 0Tools and files. 19 referenced file(s) missing: docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, docs.claude.com/en/docs/agents-and-tools/agent-skills/overview, FORMS.md
  • 0Inputs and preconditions. Does not say what the process needs to start
  • 0Failures and branches. Linear process with no failure handling
  • 0Progress reporting. Says nothing while it works
  • 20When it triggers. No condition that starts the skill
  • 30Running it twice. 20 mutating operations with no state check
  • 40Execution cost. Instruction body is 10488 tokens: crowds the task out of the window
  • 60Steps. 129 steps, 4 vague phrases
  • 60Result and completion. Output format stated, no completion criterion
  • 100Consistency. Name and required fields are in place
  • medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
  • low 16 top-level sections: this looks like several domains in one skill
  • low The response is described with custom markup (12 tags): a typed call is more reliable

Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.

Quality signals

  • +5Description has no quoted example phrases that should trigger the skill
  • +4Description does not say when NOT to use the skill (false activations)
  • +1No license
  • +2Single-language instructions
  • +3Description length 140: enough signal without eating the budget
  • +4Structure: 56 headings
  • +3Step-by-step instructions: 129 items
  • +3Output format is stated explicitly
  • +4Has examples (51 code blocks)

Quality base 70; lint remarks subtract, signals add up to 100. Result: 65.