Safe Change

Skill: safe-change

When to use

Modifying any function, class, or module called from more than one place.

Steps

1. Run impact-check skill — get list of all callers and dependents.
2. Note current observable behaviour (return values, side effects).
3. Make minimal change. Don't touch adjacent code.
4. For each caller from step 1: verify backward-compatible or explicitly update caller.
5. CHECK: ls <test-dir>/*<module>* 2>/dev/null | head -3 — if tests exist, RUN: <test-cmd>. If none, note explicitly in commit message.
6. Confirm: "Changed X. Verified Y still works." Then invoke verify-before-commit.

Rules

• Backward compatibility impossible → surface to user before proceeding.
• Touch only what task requires — no opportunistic refactoring.
• No tests exist → acceptable to note — don't add tests outside task scope.

Output Report

After all main skill tasks complete, write a propose draft to the wiki.

Steps

1. Build the filename:

• Format: DDMMYY-<ten>.md
• DDMMYY = today (e.g., 020626 for 2 June 2026)
• <ten> = 2–4 kebab-case words summarising what was done (e.g., landing-page-coteccons, brand-kit-fintech, ingest-auth-spec)

2. Write llmwiki/wiki/sources/draft/DDMMYY-<ten>.md:

# DDMMYY-<ten>
**Type:** draft
**Status:** proposed
**Tags:** <skill-name>, output-report
**Proposed:** YYYY-MM-DD

## What
<One sentence — what this skill invocation produced or decided>

## Output
<Key artefacts, files created/modified, or decisions made>

## Files
| File | Action |
|------|--------|
| `path/to/file` | created / modified |

## Notes
- Invoked via: `/<skill-name>` skill

## Origin
- **Draft:** `wiki/sources/draft/DDMMYY-<ten>.md`
- **Commit:** _(filled by verify-before-commit)_
- **Date promoted:** _(filled by verify-before-commit)_

3. Update wiki index & log:

• llmwiki/wiki/index.md — append one row: | [DDMMYY-<ten>](sources/draft/DDMMYY-<ten>.md) | draft | YYYY-MM-DD |
• llmwiki/wiki/log.md — append: ## YYYY-MM-DD — <skill-name> — <ten>

Skip only when the skill produces zero artefacts and zero decisions (e.g., a pure display mode like /caveman-stats).