Skill: create-adr

Write a new Architectural Decision Record following the MADR format used in docs/adr/.

Instructions

Step 1 – Verify prerequisites

Check that docs/adr/ exists by running Glob for docs/adr/*.md.

• If the directory does not exist or Glob returns no results at all (not even the template), stop immediately and tell the user: "The docs/adr/ directory is missing. Please create it and add an ADR template at docs/adr/0000-adr-template.md before running this skill again."

Check that docs/adr/0000-adr-template.md exists.

• If the template file is missing, stop immediately and tell the user: "No ADR template found at docs/adr/0000-adr-template.md. Please add a template before running this skill again."

Do not proceed until both checks pass.

Step 1b – Determine the next ADR number

From the Glob results, extract the four-digit numeric prefix from each filename (e.g. 0001 from 0001-hexagonal-architecture.md). The next number is the highest existing prefix plus one, zero-padded to four digits. If no non-template files exist (only 0000-adr-template.md), start at 0001.

Step 2 – Derive the filename slug

Convert $ARGUMENTS to a kebab-case slug:

• Lowercase all characters
• Replace spaces and underscores with hyphens
• Remove characters that are not alphanumeric or hyphens
• Collapse consecutive hyphens into one

Target file path: docs/adr/{XXXX}-{slug}.md

Example: "use bpmn-to-code for process constant generation" → docs/adr/0002-use-bpmn-to-code-for-process-constant-generation.md

Step 3 – Read the template

Read docs/adr/0000-adr-template.md (already confirmed to exist in Step 1) as the structural reference.

Step 4 – Gather content from the user

Ask the user the following (you may ask all at once). Skip any question that $ARGUMENTS already answers.

1. Context: What is the problem or situation that motivated this decision? What forces or constraints apply?
2. Decision: What was decided? State it in one or two clear sentences using active voice.
3. Positive consequences: What becomes better or easier as a result?
4. Negative consequences: What becomes harder or is accepted as a trade-off?
5. Neutral consequences (optional): What simply changes, with no clear positive or negative value?

Step 5 – Draft the ADR

Compose the ADR using the template structure:

• Title: short imperative phrase derived from $ARGUMENTS
• Date: today's date in YYYY-MM-DD format
• Status: Accepted by default — ask the user only if they indicate a different status is appropriate
• Context, Decision, Consequences: from Step 4

Show the complete draft to the user before writing.

Step 6 – Confirm and write

Ask: "Write this ADR to {target-path}? (yes / edit / cancel)"

• yes → write the file and report the path
• edit → apply the user's changes, show the updated draft, and ask again
• cancel → stop without writing

Step 7 – Report

After writing, output:

• The path of the created file
• A reminder to commit the ADR in the same commit as the code change it documents, so the decision and its implementation are traceable together in git history