docs: update README with until parameter for all tools

Added until parameter documentation for:
- get_file_churn
- get_code_ownership
- get_velocity_trends
- get_collaboration_metrics
- get_quality_metrics
- get_conventional_commits

All tools now support period comparisons with inclusive until dates.
README now accurately reflects code capabilities.

Author: jonmatum

README.md

@@ -233,6 +233,7 @@ Files with most changes (indicates complexity or issues).
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 - `limit` (optional): Number of files, default 10
 
 **Returns:**
@@ -294,6 +295,7 @@ Bus factor and knowledge distribution.
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 
 **Returns:**
 ```json
@@ -314,6 +316,7 @@ Track velocity over time.
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 - `interval` (optional): "week" or "month", default "week"
 
 **Returns:**
@@ -333,6 +336,7 @@ Team interaction patterns.
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 
 **Returns:**
 ```json
@@ -351,6 +355,7 @@ Code quality indicators.
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 
 **Returns:**
 ```json
@@ -389,6 +394,7 @@ Analyze conventional commit usage and release patterns.
 **Parameters:**
 - `repo_path` (required): Path to git repository
 - `since` (required): Start date (YYYY-MM-DD)
+- `until` (optional): End date (YYYY-MM-DD), inclusive
 
 **Returns:**
 ```json

src/git-metrics.ts

@@ -224,6 +224,7 @@ server.setRequestHandler(ListToolsRequestSchema, async () => ({
         properties: {
           repo_path: { type: "string", description: "Path to git repository" },
           since: { type: "string", description: "Start date (YYYY-MM-DD)" },
+          until: { type: "string", description: "End date (YYYY-MM-DD), optional" },
         },
         required: ["repo_path", "since"],
       },

src/handlers.ts

@@ -366,12 +366,15 @@ export function handleGetTechnicalDebt(args: any) {
 }
 
 export function handleGetConventionalCommits(args: any) {
-  const { repo_path, since } = args;
+  const { repo_path, since, until } = args;
 
   validateRepoPath(repo_path);
   validateDate(since, "since");
+  if (until) validateDate(until, "until");
 
-  const cmd = `git log --since="${since}" --pretty=format:"%H|%s|%ad" --date=short`;
+  let cmd = `git log --since="${since}"`;
+  if (until) cmd += ` --until="${until} 23:59:59"`;
+  cmd += ` --pretty=format:"%H|%s|%ad" --date=short`;
   const output = runGitCommand(repo_path, cmd);
   const lines = output.trim().split("\n").filter(l => l);