| name | optimise-skill |
| description | Analyzes SKILL.md and supporting files, then produces an optimized rewrite that is clearer, more concise, and gives the agent more freedom to adapt. |
Goal
Analyze a skill's full directory and produce an optimized rewrite. The goal is not to change what the skill does — it's to make the skill easier for an LLM to understand and execute effectively, by removing redundancy, separating concerns, and replacing rigid instructions with guiding principles.
Acceptance Criteria
- The skill's core deliverable and workflow are preserved unchanged
- Behavioral guidance (what to do, how to think) lives in SKILL.md only — not in templates or reference files
- Templates contain format-only content — the structure of the output, not instructions on how to fill it
- Reference files are optional lookup — tool flags, API parameters — never marked as required reading
- Token count is reduced compared to the original (fewer sections, less repetition)
- Every workflow step serves a distinct purpose — no overlapping or duplicate steps
- All cross-file references remain valid after changes
Core Principle: Three-Layer Separation
A well-structured skill separates three distinct concerns:
| Layer | What it contains | Where it lives |
|---|
| Behavioral | How to think, what to check, what principles to follow | SKILL.md |
| Format | What the output structure looks like | Template files |
| Tool | CLI flags, API params, external commands | Reference files |
The most common problem in unoptimized skills is mixing these layers — templates that tell the agent what to do, SKILL.md that describes output formats, references that contain behavioral rules. Your job is to untangle them.
Approach
1. Read and Map
Read the full skill directory — SKILL.md, templates, references. Before you can optimize, understand:
- What does this skill produce and who consumes it?
- What does it read from upstream stages?
- Which parts actually get used downstream vs which are decorative?
2. Classify and Untangle
Go through every section across all files and classify it as behavioral, format, or tool guidance. When you find content in the wrong layer, move it:
- Behavioral content in templates → move to SKILL.md, leave only the format skeleton
- Behavioral content in references → move to SKILL.md, or remove if already covered
- Format content in SKILL.md → keep lightweight description, move details to template
- Tool content in SKILL.md → move to references/
The key question: "If I removed this file, what would the agent lose?" If the answer is "behavioral guidance," that content belongs in SKILL.md. If it's "structure to fill," it belongs in a template. "CLI flags to look up" belongs in references.
3. Trace Consumption
For each field, section, and table in the skill's output (template), ask who actually reads it downstream. Prune what nobody consumes:
- Tables that duplicate information expressed elsewhere (e.g., an ASCII dependency graph alongside structured
Depends on fields)
- Columns that are "nice to have" but never referenced by downstream skills
- Key-value pairs that would be clearer and shorter as natural language
- Speculative fields that ask for predictions or guesses
4. Eliminate Contradictions
Compare closely related rules across files. Contradictions confuse agents. Look for:
- Same rule expressed with different wording in SKILL.md vs a template
- Downstream skill assuming a structure that upstream changed
- Two steps in the workflow that overlap in purpose or decision logic
5. Restructure SKILL.md for Clarity
After untangling, restructure SKILL.md so it guides the agent's thinking rather than scripting every keystroke:
Good: "Define error recovery rules that fit the specific task. Think through retry limits, escalation paths, and what happens mid-batch. The ALWAYS / ASK FIRST / NEVER framework is one useful structure — adapt it as needed."
Avoid: "Error Recovery: Worker fails → retry once. Fails again → pause. Merge conflict → coordinator resolves."
The former teaches the agent a thought process. The latter gives it text to copy-paste, which is brittle and task-specific.
Principles for writing guidance:
- Teach concepts, not steps — explain the why, not just the what
- Provide frameworks, not scripts — offer mental models the agent can adapt
- Ask questions — prompt the agent to think ("What should happen when a worker fails? What's the right retry policy for this kind of task?")
- Describe outcomes, not methods — "verify every issue is resolved" not "run command X and check for Y"
6. Verify Consistency
Before delivering, confirm:
- Every file referenced by downstream consumers still exists with the expected fields
- Section names and file paths referenced across files are still valid
- No contradictions between SKILL.md and templates
- No behavioral guidance leaked into templates during restructuring
7. Self-Check
References
references/example_skill.md — Example of optimized skill structure (optional reference)
