Fix promt instructions

internal/app/gpt/gpt.go

@@ -17,85 +17,84 @@ import (
 )
 
 const (
-	commitSystemPromt = `You are an expert at writing Conventional Commit messages following the v1.0.0 specification.
-Analyze the provided git diff and generate a properly formatted commit message.
+	commitSystemPrompt = `Generate a Conventional Commit message.
+
+STEP 1 - ANALYZE THE DIFF:
+Look at the actual content being added/removed/changed. Ask yourself:
+- What new text, logic, or functionality was added?
+- What was removed or replaced?
+- Ignore simple renames/typos if there are bigger changes.
+
+STEP 2 - IDENTIFY THE MAIN CHANGE:
+Priority: functional > structural > content > cosmetic
+A 50-line prompt rewrite is MORE important than a variable rename in the same diff.
+
+STEP 3 - WRITE THE MESSAGE:
+- type: feat|fix|refactor|docs|style|perf|test|build|ci|chore
+- scope: ONE word (gpt, auth, cli)
+- description: max 50 chars, imperative, no period
+- body: bullet list of specific changes, or empty
+
+BANNED in body:
+- "for consistency/clarity/correctness"
+- "for better/improved X"
+- Describing renames when content also changed
+- Any justification of why change is "good"
+
+GOOD: "- Add priority rules\n- Add banned phrases list"
+BAD: "Renamed variable for consistency"
+
+Return JSON only:
+{"type": "...", "scope": "...", "description": "...", "body": "..."}`
+
+	changelogSystemPrompt = `Generate a CHANGELOG in Markdown from the provided commits.
 
 RULES:
-1. Type: Choose the most appropriate type based on the change:
-   - feat: new feature or capability
-   - fix: bug fix or correction
-   - docs: documentation only changes
-   - style: code style/formatting (no functional changes)
-   - refactor: code restructuring (no functional changes)
-   - perf: performance improvements
-   - test: adding or updating tests
-   - build: build system or dependencies
-   - ci: CI/CD configuration changes
-   - chore: other changes (tooling, configs)
-   - revert: reverting a previous commit
-
-2. Scope: A one word noun describing the codebase section or package (e.g., parser, api, auth)
-
-3. Description:
-   - Start with uppercase letter
-   - Use imperative mood ("Add" not "Added" or "Adds")
-   - No period at the end
-   - Be concise but clear
-
-4. Body: Provide additional context if the change is non-trivial.
-   - Use to explain "what" and "why", not "how"
-   - Wrap at 72 characters
-
-EXAMPLES:
-- feat(auth): Add OAuth2 login support
-- docs(readme): Update installation instructions
-- refactor(parser): Extract validation logic into separate function
-
-Return ONLY valid JSON in this format:
-{
-  "type": "feat, fix, build, chore, ci, docs, style, refactor, perf, test, revert",
-  "scope": "scope of the change (use one word)",
-  "description": "a brief description of what was changed in imperative mood",
-  "body": "optional detailed explanation"
-}`
-
-	changelogSystemPrompt = `You are an experienced Software Engineer tasked with generating a concise and clear CHANGELOG for a set of commits in Markdown format.
-Follow these instructions:
-– Keep the content concise, using short bullet points for each entry
-– Do not elaborate unnecessarily. Focus on the core details
-– Ensure proper formatting for easy readability
-– Do not include empty sections
-
-Follow the format below:
+- One short bullet per change
+- Focus on functional changes (features, fixes), not internal refactors
+- Only include sections that have actual entries
+- No filler phrases ("for clarity", "for consistency", "improved X")
+
+EMPTY SECTIONS:
+BAD (never do this):
+### Fixes
+- None
+### Breaking Changes
+- N/A
+
+GOOD (just omit empty sections):
+### Features
+- Add user authentication
+
+PRIORITY (what to include):
+1. Features and fixes - always include
+2. Breaking changes - always include
+3. Performance - include if significant
+4. Build/CI - include if affects users
+5. Refactor/style/chore/tests - omit unless notable
+
+FORMAT (in this order, omit empty sections):
 
 # CHANGELOG
 
 ## [X.Y.Z]
 
+### Breaking Changes
+- What breaks and migration steps
+
 ### Features
-- **feat:** ...
+- Short description (no "feat:" prefix, section name is enough)
+
 ### Fixes
-- **fix:** ...
+- Short description (no "fix:" prefix)
+
 ### Performance
-- **perf:** ...
-### Refactor
-- **refactor:** ...
+- Short description
+
 ### Documentation
-- **docs:** ...
-### Style
-- **style:** ...
-### Tests
-- **test:** ...
-### Build
-- **build:** ...
-### CI
-- **ci:** ...
-### Chore
-- **chore:** ...
-### Reverts
-- **revert:** ...
-### Breaking Changes
-- **BREAKING CHANGES:** ...`
+- Short description
+
+Do NOT include: Tests, Chore, Style, CI, Build (unless affects end users)`
 )
 
 type commitType string
@@ -173,7 +172,7 @@ func (g *client) FetchCommitMessage(ctx context.Context, diff string) (string, e
 	messages := []openai.ChatCompletionMessage{
 		{
 			Role:    openai.ChatMessageRoleSystem,
-			Content: commitSystemPromt,
+			Content: commitSystemPrompt,
 		},
 		{
 			Role:    openai.ChatMessageRoleUser,