System Prompt Creator

System Prompt Creator

Create prompts that implement the user's requirements and can be applied and evaluated. The evaluation target is the generated system prompt's behavior against the user's requirements, not this skill's writing style or a generic prompt-quality score.

Scope

Create a new system prompt or a requested set of stage prompts. Revisions and comparisons within that creation task are supported. Standalone review or optimization of an existing prompt, one-off user messages, agent/skill definition files, and image/video prompts are outside scope.

Workflow

1. Recover requirements from the conversation. Identify purpose, runtime inputs, expected output, constraints, domain policies, and usage environment. Record material requirements with IDs and their source wording; distinguish user requirements, delegated design choices, and disclosed defaults. Do not ask again for supplied information.
2. Resolve consequential gaps. Apply the clarification gate below. Ask focused questions only for decisions that change correctness or integration; retain known requirements while waiting. Do not issue a finished prompt or invented expected answers while such gaps remain.
3. Choose the configuration. Default to one model-neutral prompt. Honor explicitly requested stages, branches, or loops; read multi_prompt_architecture.md when those apply. Multiple output fields alone do not require multiple prompts.
4. Assemble and explain application. Read prompt_structure.md. Separate stable instructions, live user requests, and source material. Read data_format_selection.md when embedding structured data or defining a stage contract. If a model/provider is named, read only the applicable parts of model_guidance.md, check current official sources, and cite any resulting adaptation. Do not silently switch the requested target.
5. Check requirement fidelity. Read quality_criteria.md. Check that policies, examples, output values, input placement, and stage contracts agree with the request. This is a document review, not an execution result.
6. Prepare evaluation materials. Read evaluation.md. Derive concrete cases and grading criteria from requirements, their interactions, and plausible failures; there is no fixed case quota. Include coverage and limitations. Initially mark results not_run.
7. Deliver, then simulate only with approval. Provide the output below before requesting simulation approval. Show the exact cases, prompt versions, run scope, and current-agent limitation. Approval of prompt creation or evaluation-material preparation is not simulation approval. Execute only the approved scope; otherwise leave results not_run and finish the deliverable. Follow the result-preservation and comparison rules in the evaluation reference.

Clarification Gate

Use what is present in the conversation before deciding something is missing.

Delegation permits a proposed design, not fabricated facts about an existing system. Label designed taxonomies, policies, and schemas as proposals and keep them consistent across the prompt, usage note, and evaluation materials. "Just get it going" is not authority to invent an existing API or company policy.

Fallbacks and tie-breaks are task decisions. Preserve the allowed outputs; do not add Other, unknown, neutral, a refusal, or a human-escalation route merely to complete a template. Ask about a missing consequential rule, or design it when delegated. For open-ended tasks, a stated default such as acknowledging absent source information can be appropriate without inventing business policy.

Examples of the Gate

• Proceed with defaults: "Summarize weekly sales-call transcripts; keep it simple." Use a concise summary format, disclose it, and ground the summary in the transcript. Do not require a sales methodology or invent deal stages and qualification rules.
• Ask for labels: "Classify tickets as JSON with category and confidence." Ask for the taxonomy and relevant decision rules; the JSON keys are already known.
• Proceed with delegation: "Design a small taxonomy for our new helpdesk; choose the labels and an ambiguity rule." Propose that design, identify it as delegated, and use the same rules in evaluation cases.
• Ask for an existing contract: "Extract, validate, then format exactly as our quoting API expects." The three stages are clear; request the API schema and any missing mapping/error policy. Do not substitute a guessed payload and describe it as compatible.
• Ask about a conflict: "Return exactly positive or negative; use neutral for mixed reviews." Resolve the allowed-label conflict before generating the classifier or its expected answers.

Output Contract

By default, deliver all three items in the user's requested language (otherwise the request's language); use the target audience's language for the generated prompt when specified.

1. Copyable prompt(s). Each complete system prompt has its own fenced block. Keep usage notes and evaluation materials outside the prompt. For multiple prompts, label stages and include their input/output contracts, routing, error propagation, and loop termination.
2. Short application guidance. Identify where stable instructions and runtime inputs go, required variables and their meanings/types, source-material boundaries, and any required tools, API settings, or supplied policy data. Distinguish verified target settings from generic guidance; say when no provider-specific configuration has been selected. Disclose presentation defaults and delegated choices. Explain architecture only as much as needed.
3. Request-derived evaluation materials. Include requirement IDs and source wording, observable success criteria, concrete inputs and needed conversation context, exact expected answers or acceptable-output rubrics, failure conditions, case-selection reasons, a coverage map, result records, and unverified requirements/limitations. Use the evaluation reference's reusable layouts. Expected outputs are not observed outputs.

Respect an explicit request to omit or narrow evaluation materials; briefly state the resulting unverified scope without forcing an evaluation workflow. Do not certify production suitability from a generated prompt, checklist, or current-agent simulation, even if asked for a finished prompt. Creating materials does not authorize any run.

When a prompt changes during creation, retain the prior prompt text/version and compare shared requirements using the same inputs and criteria. Record improved / unchanged / worsened / indeterminate with evidence, never hypothetical prior results. A new prompt has no previous run; its first authorized execution becomes the baseline.