huskies: merge 572_story_edit_criterion_mcp_tool_to_update_acceptance_criteria_text

server/src/http/mcp/mod.rs

@@ -513,6 +513,28 @@ fn handle_tools_list(id: Option<Value>) -> JsonRpcResponse {
                         "required": ["story_id", "criterion_index"]
                     }
                 },
+                {
+                    "name": "edit_criterion",
+                    "description": "Update the text of an existing acceptance criterion in place, preserving its checked/unchecked state. Uses a 0-based index counting all criteria (both checked and unchecked).",
+                    "inputSchema": {
+                        "type": "object",
+                        "properties": {
+                            "story_id": {
+                                "type": "string",
+                                "description": "Story identifier (filename stem, e.g. '28_my_story')"
+                            },
+                            "criterion_index": {
+                                "type": "integer",
+                                "description": "0-based index of the criterion to edit (counts all criteria)"
+                            },
+                            "new_text": {
+                                "type": "string",
+                                "description": "New text for the criterion (without the '- [ ] ' or '- [x] ' prefix)"
+                            }
+                        },
+                        "required": ["story_id", "criterion_index", "new_text"]
+                    }
+                },
                 {
                     "name": "add_criterion",
                     "description": "Add an acceptance criterion to an existing story file. Appends '- [ ] {criterion}' after the last existing criterion in the '## Acceptance Criteria' section. Auto-commits via the filesystem watcher.",
@@ -1242,6 +1264,7 @@ async fn handle_tools_call(id: Option<Value>, params: &Value, ctx: &AppContext)
         "accept_story" => story_tools::tool_accept_story(&args, ctx),
         // Story mutation tools (auto-commit to master)
         "check_criterion" => story_tools::tool_check_criterion(&args, ctx),
+        "edit_criterion" => story_tools::tool_edit_criterion(&args, ctx),
         "add_criterion" => story_tools::tool_add_criterion(&args, ctx),
         "update_story" => story_tools::tool_update_story(&args, ctx),
         // Spike lifecycle tools
@@ -1426,7 +1449,7 @@ mod tests {
         assert!(names.contains(&"loc_file"));
         assert!(names.contains(&"dump_crdt"));
         assert!(names.contains(&"get_version"));
-        assert_eq!(tools.len(), 63);
+        assert_eq!(tools.len(), 64);
     }
 
     #[test]

server/src/http/mcp/story_tools.rs

@@ -5,8 +5,9 @@ use crate::agents::{
 use crate::http::context::AppContext;
 use crate::http::workflow::{
     add_criterion_to_file, check_criterion_in_file, create_bug_file, create_refactor_file,
-    create_spike_file, create_story_file, list_bug_files, list_refactor_files, load_pipeline_state,
-    load_upcoming_stories, update_story_in_file, validate_story_dirs,
+    create_spike_file, create_story_file, edit_criterion_in_file, list_bug_files,
+    list_refactor_files, load_pipeline_state, load_upcoming_stories, update_story_in_file,
+    validate_story_dirs,
 };
 use crate::io::story_metadata::{
     check_archived_deps, check_archived_deps_from_list, parse_front_matter, parse_unchecked_todos,
@@ -331,6 +332,28 @@ pub(super) fn tool_check_criterion(args: &Value, ctx: &AppContext) -> Result<Str
     ))
 }
 
+pub(super) fn tool_edit_criterion(args: &Value, ctx: &AppContext) -> Result<String, String> {
+    let story_id = args
+        .get("story_id")
+        .and_then(|v| v.as_str())
+        .ok_or("Missing required argument: story_id")?;
+    let criterion_index = args
+        .get("criterion_index")
+        .and_then(|v| v.as_u64())
+        .ok_or("Missing required argument: criterion_index")? as usize;
+    let new_text = args
+        .get("new_text")
+        .and_then(|v| v.as_str())
+        .ok_or("Missing required argument: new_text")?;
+
+    let root = ctx.state.get_project_root()?;
+    edit_criterion_in_file(&root, story_id, criterion_index, new_text)?;
+
+    Ok(format!(
+        "Criterion {criterion_index} updated for story '{story_id}'."
+    ))
+}
+
 pub(super) fn tool_add_criterion(args: &Value, ctx: &AppContext) -> Result<String, String> {
     let story_id = args
         .get("story_id")