refactor(git,commitGenerator): add git context with stat and improve prompt structure

- introduce `getGitContext` returning both diff and name-status stat output
- update `generateForRepository` and `performGeneration` to consume new context
- prefix prompt with changed files stat block when available
- replace `commitStyle` config key with `promptVersion` using `LATEST_PROMPT_VERSION`
- fix first-commit diff logic to use else-branch instead of fallthrough checks
- update extension icon

src/commitGenerator.ts

@@ -1,6 +1,7 @@
 import * as path from "path"
 import * as vscode from "vscode"
-import { getGitDiffStagedFirst } from "./git"
+import { getGitContext, getGitDiffStagedFirst } from "./git"
+import { LATEST_PROMPT_VERSION } from "./prompts"
 import { createProvider } from "./providers"
 
 let abortController: AbortController | undefined
@@ -99,7 +100,7 @@ async function filterReposWithChanges(repos: unknown[]): Promise<unknown[]> {
 async function generateForRepository(repository: any): Promise<void> {
   const repoPath = repository.rootUri.fsPath
   const repoName = repoPath.split(path.sep).pop() || "repository"
-  const diff = await getGitDiffStagedFirst(repoPath)
+  const { diff, stat } = await getGitContext(repoPath)
 
   await vscode.window.withProgress(
     {
@@ -107,26 +108,26 @@ async function generateForRepository(repository: any): Promise<void> {
       title: `Zemit : Génération du message de commit pour ${repoName}...`,
       cancellable: true,
     },
-    (_progress, token) => performGeneration(repository.inputBox, diff, token),
+    (_progress, token) => performGeneration(repository.inputBox, diff, stat, token),
   )
 }
 
 async function performGeneration(
   inputBox: any,
   diff: string,
+  stat: string,
   token: vscode.CancellationToken,
 ): Promise<void> {
   const config = vscode.workspace.getConfiguration("zemit")
   const maxDiffSize = config.get<number>("maxDiffSize", 5000)
-  const style = config.get<string>("commitStyle", "conventional")
+  const style = config.get<string>("promptVersion", LATEST_PROMPT_VERSION)
 
   const truncatedDiff =
     diff.length > maxDiffSize ? diff.substring(0, maxDiffSize) + "\n\n[Diff truncated due to size]" : diff
 
-  // Include any existing user note in the prompt
   const existingNote = inputBox.value?.trim() || ""
 
-  let prompt = truncatedDiff
+  let prompt = stat ? `## Changed files\n${stat}\n\n## Diff\n${truncatedDiff}` : truncatedDiff
   if (existingNote) {
     prompt = `Developer note (use if relevant): ${existingNote}\n\n${prompt}`
   }

src/git.ts

@@ -43,17 +43,15 @@ export async function getGitDiff(cwd: string, stagedOnly = false): Promise<strin
   if (await hasCommits(cwd)) {
     const { stdout: staged } = await execAsync("git --no-pager diff --staged --diff-filter=d", { cwd })
     diff = staged.trim()
-  }
 
-  if (!stagedOnly && !diff) {
-    const { stdout: unstaged } = await execAsync("git --no-pager diff HEAD --diff-filter=d", { cwd })
-    diff = unstaged.trim()
-  }
-
-  // New repo with no commits yet — show everything that's staged/tracked
-  if (!diff) {
-    const { stdout: newRepo } = await execAsync("git --no-pager diff --cached --diff-filter=d", { cwd })
-    diff = newRepo.trim()
+    if (!stagedOnly && !diff) {
+      const { stdout: unstaged } = await execAsync("git --no-pager diff HEAD --diff-filter=d", { cwd })
+      diff = unstaged.trim()
+    }
+  } else {
+    // First commit — no HEAD exists yet
+    const { stdout: cached } = await execAsync("git --no-pager diff --cached --diff-filter=d", { cwd })
+    diff = cached.trim()
   }
 
   // Include untracked (new) files when not limiting to staged only
@@ -85,3 +83,55 @@ export async function getGitDiffStagedFirst(cwd: string): Promise<string> {
     return await getGitDiff(cwd, false)
   }
 }
+
+export async function getGitContext(cwd: string): Promise<{ diff: string; stat: string }> {
+  if (!(await isGitInstalled())) throw new Error("Git n'est pas installé")
+  if (!(await isGitRepo(cwd))) throw new Error("Pas un dépôt git")
+
+  let diff = ""
+  let stat = ""
+  let includeUntracked = false
+
+  if (await hasCommits(cwd)) {
+    const { stdout: stagedDiff } = await execAsync("git --no-pager diff --staged --diff-filter=d", { cwd })
+    diff = stagedDiff.trim()
+
+    if (diff) {
+      const { stdout: stagedStat } = await execAsync("git --no-pager diff --staged --name-status", { cwd })
+      stat = stagedStat.trim()
+    } else {
+      includeUntracked = true
+      const { stdout: allDiff } = await execAsync("git --no-pager diff HEAD --diff-filter=d", { cwd })
+      diff = allDiff.trim()
+      const { stdout: allStat } = await execAsync("git --no-pager diff HEAD --name-status", { cwd })
+      stat = allStat.trim()
+    }
+  } else {
+    // First commit — no HEAD exists yet
+    includeUntracked = true
+    const { stdout: cachedDiff } = await execAsync("git --no-pager diff --cached --diff-filter=d", { cwd })
+    diff = cachedDiff.trim()
+    const { stdout: cachedStat } = await execAsync("git --no-pager diff --cached --name-status", { cwd })
+    stat = cachedStat.trim()
+  }
+
+  if (includeUntracked) {
+    const { stdout: untrackedList } = await execAsync("git ls-files --others --exclude-standard", { cwd })
+    const untrackedFiles = untrackedList.trim().split("\n").filter(Boolean)
+    for (const file of untrackedFiles) {
+      const result = await execAsync(
+        `git --no-pager diff --no-index -- /dev/null ${JSON.stringify(file)}`,
+        { cwd },
+      ).catch((e: any) => ({ stdout: e.stdout as string | undefined }))
+      if (result.stdout) diff += (diff ? "\n" : "") + result.stdout
+      stat += (stat ? "\n" : "") + `A\t${file}`
+    }
+  }
+
+  diff = diff.trim()
+  stat = stat.trim()
+
+  if (!diff) throw new Error("Aucune modification trouvée pour générer un message de commit")
+
+  return { diff, stat }
+}

src/prompts.ts

@@ -1,7 +1,9 @@
+export const LATEST_PROMPT_VERSION = "zemit-v2"
+
 export const SYSTEM_PROMPT =
   "You are a git commit message generator. Output only the commit message — no explanation, no preamble, no backticks, no quotes. All messages must be written in English."
 
-export const CONVENTIONAL_INSTRUCTION = `Based on the provided git diff, generate a concise and descriptive commit message following the Conventional Commits format:
+export const ZEMIT_V1 = `Based on the provided git diff, generate a concise and descriptive commit message following the Conventional Commits format:
 
   <type>(<scope>): <short description>
 
@@ -23,4 +25,24 @@ Rules:
 - For breaking changes, add ! after the type and a BREAKING CHANGE: footer
 - Only include a body if there are multiple distinct changes to explain; for a single focused change, output the title only`
 
-export const SIMPLE_INSTRUCTION = `Based on the provided git diff, generate a short and clear one-line commit message (50-72 characters).`
+export const ZEMIT_V2 = `Generate a git commit message following Conventional Commits format:
+
+<type>(<scope>): <short description>
+
+Types: feat | fix | refactor | style | docs | test | chore | perf
+Scope: optional, affected module (e.g. auth, api, ui, config)
+Description: lowercase, imperative mood, no trailing period
+
+Body rules:
+- Single focused change → title only
+- Multiple files or distinct concerns → title + blank line + concise bullet body listing each change
+- Breaking change: add ! after type + "BREAKING CHANGE: <detail>" footer`
+
+const PROMPT_REGISTRY: Record<string, string> = {
+  "zemit-v1": ZEMIT_V1,
+  "zemit-v2": ZEMIT_V2,
+}
+
+export function getPrompt(version: string): string {
+  return PROMPT_REGISTRY[version] ?? PROMPT_REGISTRY[LATEST_PROMPT_VERSION]
+}

src/providers.ts

@@ -1,5 +1,5 @@
 import * as vscode from "vscode"
-import { SYSTEM_PROMPT, CONVENTIONAL_INSTRUCTION, SIMPLE_INSTRUCTION } from "./prompts"
+import { SYSTEM_PROMPT, getPrompt } from "./prompts"
 
 export interface AIProvider {
   generateCommitMessage(diff: string, style: string, signal: AbortSignal): AsyncIterable<string>
@@ -15,7 +15,7 @@ class OpenAICompatibleProvider implements AIProvider {
   ) {}
 
   async *generateCommitMessage(diff: string, style: string, signal: AbortSignal): AsyncIterable<string> {
-    const instruction = style === "conventional" ? CONVENTIONAL_INSTRUCTION : SIMPLE_INSTRUCTION
+    const instruction = getPrompt(style)
     const url = `${this.baseUrl}/chat/completions`
 
     const response = await fetch(url, {
@@ -58,7 +58,7 @@ class AnthropicProvider implements AIProvider {
   ) {}
 
   async *generateCommitMessage(diff: string, style: string, signal: AbortSignal): AsyncIterable<string> {
-    const instruction = style === "conventional" ? CONVENTIONAL_INSTRUCTION : SIMPLE_INSTRUCTION
+    const instruction = getPrompt(style)
     const url = `${this.baseUrl}/messages`
 
     const response = await fetch(url, {