How do I install the Diff Profile skill?

Run npx skillmds@latest add thettwe/diff-profile in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Diff Profile safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Diff Profile?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Diff Profile free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Diff Profile?

thettwe (@thettwe) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Diff Profile by thettwe — Agent Skill

Name: Diff Profile
Author: thettwe

Diff Profile

Compare two nyann profiles side-by-side and show what would change. TRIGGER ON: 'diff profiles', 'compare profiles', 'what's different between profiles', 'profile diff', 'diff default vs nextjs', 'compare default and python-cli', 'what would change if I switch profiles', 'show me the difference between profiles', 'how does X profile differ from Y', 'what hooks does X add over Y', 'profile comparison', '/nyann:diff-profile'. Do NOT trigger on "switch profile" / "migrate profile" — those are migrate-profile. Do NOT trigger on "inspect profile" / "what does this profile do" — those are inspect-profile.

thettwe 4a5f405 3.2 KB Updated Sep 17, 2026

File contents

diff-profile — Compare Two Profiles

You are the diff-profile skill. You compare two nyann profiles and show exactly what would change: hooks added/removed, branching rules, CI config, documentation settings, and more.

When to trigger

User asks to compare, diff, or contrast two profiles
User is considering switching profiles and wants to see the impact
User asks "what hooks does X add over Y" or "what's different"
User asks what would change before running migrate-profile

DO NOT trigger on: "switch to profile X" (migrate-profile), "what does this profile do" (inspect-profile), "audit this repo" (doctor).

Execution flow

1. Resolve the two profiles

The user must name two profiles. Common patterns:

Explicit: "diff default vs nextjs-prototype"
Current vs target: "what would change if I switch to python-cli" → resolve the current profile from CLAUDE.md / preferences, then diff current vs the named target.
If only one profile is named and the repo has an active profile, use the active profile as from and the named one as to.
If you can't determine both, ask: "Which two profiles should I compare?"

2. Run the diff

bin/diff-profile.sh <from> <to>

Both arguments are bare profile names (e.g. default, python-cli), not filesystem paths. The script resolves them via load-profile.sh.

3. Present the results

Show a section-by-section summary. Focus on what the user cares about:

Hooks: "Switching adds eslint, prettier to pre-commit and removes gitleaks."
Branching: "Strategy changes from github-flow to gitflow."
CI: "CI generation gets enabled."
Documentation: "Scaffold types gain prd and research."

If identical is true, say so: "These profiles are identical."

For human-readable output, pass --format human to the script instead of rendering JSON yourself.

4. Suggest next steps

"Want to switch? Run /nyann:migrate-profile to apply the change."
"Want to inspect either profile in detail? Run /nyann:inspect-profile <name>."
If there are hook changes: "After switching, run /nyann:retrofit to install the new hooks."

Error handling

Profile not found → show the available profiles list from load-profile.sh's error output and ask the user to pick a valid name.
Same profile named twice → "Both profiles are the same. Nothing to diff."

When to hand off

"Switch to this profile" → migrate-profile.
"Tell me about this profile" → inspect-profile.
"Apply these changes" → retrofit.
"Bootstrap with this profile" → bootstrap-project.

---name: diff-profiledescription: Compare two nyann profiles side-by-side and show what would change. TRIGGER ON: 'diff profiles', 'compare profiles', 'what's different between profiles', 'profile diff', 'diff default vs nextjs', 'compare default and python-cli', 'what would change if I switch profiles', 'show me the difference between profiles', 'how does X profile differ from Y', 'what hooks does X add over Y', 'profile comparison', '/nyann:diff-profile'. Do NOT trigger on "switch profile" / "migrate profile" — those are migrate-profile. Do NOT trigger on "inspect profile" / "what does this profile do" — those are inspect-profile.---# diff-profile — Compare Two ProfilesYou are the diff-profile skill. You compare two nyann profiles and showexactly what would change: hooks added/removed, branching rules, CI config,documentation settings, and more.## When to trigger- User asks to compare, diff, or contrast two profiles- User is considering switching profiles and wants to see the impact- User asks "what hooks does X add over Y" or "what's different"- User asks what would change before running migrate-profile**DO NOT trigger on:** "switch to profile X" (migrate-profile), "what doesthis profile do" (inspect-profile), "audit this repo" (doctor).## Execution flow### 1. Resolve the two profilesThe user must name two profiles. Common patterns:- Explicit: "diff default vs nextjs-prototype"- Current vs target: "what would change if I switch to python-cli" → resolve the current profile from CLAUDE.md / preferences, then diff current vs the named target.- If only one profile is named and the repo has an active profile, use the active profile as `from` and the named one as `to`.- If you can't determine both, ask: "Which two profiles should I compare?"### 2. Run the diff```bin/diff-profile.sh <from> <to>```Both arguments are **bare profile names** (e.g. `default`, `python-cli`),not filesystem paths. The script resolves them via `load-profile.sh`.### 3. Present the resultsShow a section-by-section summary. Focus on what the user cares about:- **Hooks:** "Switching adds `eslint`, `prettier` to pre-commit and removes `gitleaks`."- **Branching:** "Strategy changes from github-flow to gitflow."- **CI:** "CI generation gets enabled."- **Documentation:** "Scaffold types gain `prd` and `research`."If `identical` is true, say so: "These profiles are identical."For human-readable output, pass `--format human` to the script insteadof rendering JSON yourself.### 4. Suggest next steps- "Want to switch? Run `/nyann:migrate-profile` to apply the change."- "Want to inspect either profile in detail? Run `/nyann:inspect-profile <name>`."- If there are hook changes: "After switching, run `/nyann:retrofit` to install the new hooks."## Error handling- Profile not found → show the available profiles list from load-profile.sh's error output and ask the user to pick a valid name.- Same profile named twice → "Both profiles are the same. Nothing to diff."## When to hand off- "Switch to this profile" → `migrate-profile`.- "Tell me about this profile" → `inspect-profile`.- "Apply these changes" → `retrofit`.- "Bootstrap with this profile" → `bootstrap-project`.

Frequently asked questions