feat(tag): vectorize repo tags after hook sync with incremental embedding + FC tool

- HookWorker gains optional embed_service field
- Captures changed tag names during webhook dispatch, batch-embeds after completion
- HookService auto-inits EmbedService from config for standalone git-hook binary
- Adds agent dep to git crate (no circular dep)
- SSH/HTTP servers no longer call start_worker (dedicated git-hook handles it)
- git_tag_search FC tool for agent semantic tag search with project isolation

Cargo.lock

@@ -3108,6 +3108,7 @@ name = "git"
 version = "0.2.9"
 dependencies = [
  "actix-web",
+ "agent",
  "anyhow",
  "async-stream",
  "base64 0.22.1",

apps/git-hook/src/main.rs

@@ -112,7 +112,7 @@ async fn main() -> anyhow::Result<()> {
         cfg,
     );
 
-    let cancel = hooks.start_worker();
+    let cancel = hooks.start_worker().await;
     let cancel_signal = cancel.clone();
 
     // 7. Start health/metrics server on a dedicated port

libs/fctool/src/git_tools/tag.rs

@@ -2,6 +2,7 @@
 
 use super::ctx::GitToolCtx;
 use agent::{ToolDefinition, ToolHandler, ToolParam, ToolRegistry, ToolSchema};
+use sea_orm::{ColumnTrait, EntityTrait, QueryFilter};
 use std::collections::HashMap;
 
 async fn git_tag_list_exec(ctx: GitToolCtx, args: serde_json::Value) -> Result<serde_json::Value, String> {
@@ -63,6 +64,56 @@ async fn git_tag_info_exec(ctx: GitToolCtx, args: serde_json::Value) -> Result<s
     Ok(tag_to_json(&info))
 }
 
+async fn git_tag_search_exec(ctx: GitToolCtx, args: serde_json::Value) -> Result<serde_json::Value, String> {
+    let p: serde_json::Map<String, serde_json::Value> = serde_json::from_value(args).map_err(|e| e.to_string())?;
+    let project_name = p.get("project_name").and_then(|v| v.as_str()).ok_or("missing project_name")?;
+    let query = p.get("query").and_then(|v| v.as_str()).ok_or("missing query")?;
+    let limit = p.get("limit").and_then(|v| v.as_u64()).unwrap_or(5) as usize;
+
+    // Resolve project_id from project_name for project isolation
+    let db = ctx.ctx.db();
+    let project = models::projects::project::Entity::find()
+        .filter(models::projects::project::Column::Name.eq(project_name))
+        .one(db)
+        .await
+        .map_err(|e| format!("DB error looking up project '{}': {}", project_name, e))?
+        .ok_or_else(|| format!("project '{}' not found", project_name))?;
+    let project_id = project.id.to_string();
+
+    // Get embed_service from context
+    let embed = ctx.ctx.embed_service()
+        .ok_or_else(|| "EmbedService not available — Qdrant vector search is disabled".to_string())?;
+
+    let results = embed.search_tags(query, &project_id, limit).await
+        .map_err(|e| format!("tag search failed: {}", e))?;
+
+    let json_results: Vec<serde_json::Value> = results.into_iter().map(|r| {
+        let repo_name = r.payload.extra.as_ref()
+            .and_then(|e| e.get("repo_name"))
+            .and_then(|v| v.as_str())
+            .unwrap_or("")
+            .to_string();
+        let tag_name = r.payload.extra.as_ref()
+            .and_then(|e| e.get("tag_name"))
+            .and_then(|v| v.as_str())
+            .unwrap_or("")
+            .to_string();
+        let description = r.payload.extra.as_ref()
+            .and_then(|e| e.get("description"))
+            .and_then(|v| v.as_str())
+            .unwrap_or("")
+            .to_string();
+        serde_json::json!({
+            "tag_name": tag_name,
+            "repo_name": repo_name,
+            "description": description,
+            "score": r.score,
+        })
+    }).collect();
+
+    Ok(serde_json::to_value(json_results).map_err(|e| e.to_string())?)
+}
+
 pub fn register_git_tools(registry: &mut ToolRegistry) {
     // git_tag_list
     let p = HashMap::from([
@@ -97,4 +148,21 @@ pub fn register_git_tools(registry: &mut ToolRegistry) {
             })
         }),
     );
-}
+
+    // git_tag_search
+    let p = HashMap::from([
+        ("project_name".into(), ToolParam { name: "project_name".into(), param_type: "string".into(), description: Some("Project name (slug)".into()), required: true, properties: None, items: None }),
+        ("query".into(), ToolParam { name: "query".into(), param_type: "string".into(), description: Some("Semantic search query to find relevant tags".into()), required: true, properties: None, items: None }),
+        ("limit".into(), ToolParam { name: "limit".into(), param_type: "integer".into(), description: Some("Maximum number of results (default 5)".into()), required: false, properties: None, items: None }),
+    ]);
+    let schema = ToolSchema { schema_type: "object".into(), properties: Some(p), required: Some(vec!["project_name".into(), "query".into()]) };
+    registry.register(
+        ToolDefinition::new("git_tag_search").description("Semantically search tags across repositories in a project. Uses vector search to find tags relevant to the query, with project-level isolation.").parameters(schema),
+        ToolHandler::new(|ctx, args| {
+            let gctx = super::ctx::GitToolCtx::new(ctx);
+            Box::pin(async move {
+                git_tag_search_exec(gctx, args).await.map_err(agent::ToolError::ExecutionError)
+            })
+        }),
+    );
+}

libs/git/Cargo.toml

@@ -51,5 +51,6 @@ actix-web = { workspace = true }
 hex = "0.4.3"
 reqwest = { workspace = true }
 metrics = { workspace = true }
+agent = { workspace = true }
 [lints]
 workspace = true

libs/git/hook/mod.rs

@@ -11,6 +11,34 @@ pub mod webhook_dispatch;
 pub use pool::{HookWorker, PoolConfig, RedisConsumer};
 pub use pool::types::{HookTask, TaskType};
 
+/// Helper to initialize an optional EmbedService from config (graceful degradation).
+async fn init_embed_service(config: &AppConfig, db: &AppDatabase) -> Option<agent::embed::EmbedService> {
+    match agent::new_embed_client(config).await {
+        Ok(client) => {
+            let model_name = config
+                .get_embed_model_name()
+                .unwrap_or_else(|_| "text-embedding-3-small".into());
+            let dimensions = config
+                .get_embed_model_dimensions()
+                .unwrap_or(1536);
+            let svc = agent::embed::EmbedService::new(
+                client,
+                db.writer().clone(),
+                model_name,
+                dimensions,
+            );
+            // Ensure the repo_tag collection exists
+            let _ = svc.ensure_collections().await;
+            tracing::info!("hook worker: EmbedService initialized for tag embedding");
+            Some(svc)
+        }
+        Err(e) => {
+            tracing::warn!(error = %e, "hook worker: EmbedService not available — tag embedding disabled");
+            None
+        }
+    }
+}
+
 /// Hook service that manages the Redis-backed task queue worker.
 /// Multiple gitserver pods can run concurrently — the worker acquires a
 /// per-repo Redis lock before processing each task.
@@ -20,6 +48,7 @@ pub struct HookService {
     pub(crate) cache: AppCache,
     pub(crate) redis_pool: RedisPool,
     pub(crate) config: AppConfig,
+    pub(crate) embed_service: Option<agent::embed::EmbedService>,
 }
 
 impl HookService {
@@ -34,17 +63,31 @@ impl HookService {
             cache,
             redis_pool,
             config,
+            embed_service: None,
         }
     }
 
+    /// Set an externally-initialized EmbedService (e.g. from the web app).
+    pub fn with_embed_service(mut self, svc: agent::embed::EmbedService) -> Self {
+        self.embed_service = Some(svc);
+        self
+    }
+
     /// Start the background worker and return a cancellation token.
-    pub fn start_worker(&self) -> CancellationToken {
+    pub async fn start_worker(&self) -> CancellationToken {
+        // Auto-init embed_service if not set and config allows (standalone binaries)
+        let embed = match self.embed_service.clone() {
+            Some(svc) => Some(svc),
+            None => init_embed_service(&self.config, &self.db).await,
+        };
+
         let pool_config = PoolConfig::from_env(&self.config);
         pool::start_worker(
             self.db.clone(),
             self.cache.clone(),
             self.redis_pool.clone(),
             pool_config,
+            embed,
         )
     }
 }

libs/git/hook/pool/mod.rs

@@ -19,6 +19,7 @@ pub fn start_worker(
     cache: AppCache,
     redis_pool: RedisPool,
     config: PoolConfig,
+    embed_service: Option<agent::embed::EmbedService>,
 ) -> CancellationToken {
     let consumer = RedisConsumer::new(
         redis_pool.clone(),
@@ -28,7 +29,7 @@ pub fn start_worker(
 
     let http_client = Arc::new(reqwest::Client::new());
     let max_retries = config.redis_max_retries as u32;
-    let worker = HookWorker::new(db, cache, consumer, http_client, max_retries);
+    let worker = HookWorker::new(db, cache, consumer, http_client, max_retries, embed_service);
 
     let cancel = CancellationToken::new();
     let cancel_clone = cancel.clone();

libs/git/hook/pool/worker.rs

@@ -2,10 +2,13 @@ use crate::error::GitError;
 use crate::hook::pool::redis::RedisConsumer;
 use crate::hook::pool::types::{HookTask, TaskType};
 use crate::hook::sync::HookMetaDataSync;
+use agent::TagEmbedInput;
 use db::cache::AppCache;
 use db::database::AppDatabase;
 use metrics::counter;
+use models::repos::repo_tag;
 use models::EntityTrait;
+use sea_orm::{ColumnTrait, QueryFilter};
 use std::sync::Arc;
 use std::time::Duration;
 use tokio_util::sync::CancellationToken;
@@ -20,6 +23,7 @@ pub struct HookWorker {
     consumer: RedisConsumer,
     http_client: Arc<reqwest::Client>,
     max_retries: u32,
+    embed_service: Option<agent::embed::EmbedService>,
 }
 
 impl HookWorker {
@@ -29,6 +33,7 @@ impl HookWorker {
         consumer: RedisConsumer,
         http_client: Arc<reqwest::Client>,
         max_retries: u32,
+        embed_service: Option<agent::embed::EmbedService>,
     ) -> Self {
         Self {
             db,
@@ -36,6 +41,7 @@ impl HookWorker {
             consumer,
             http_client,
             max_retries,
+            embed_service,
         }
     }
 
@@ -277,6 +283,7 @@ impl HookWorker {
 
         // Dispatch tag webhooks and collect handles
         let mut tag_changes: u64 = 0;
+        let mut changed_tag_names: Vec<String> = Vec::new();
         for (tag, after_oid) in after_tag_tips {
             let before_oid = before_tag_tips
                 .iter()
@@ -286,6 +293,7 @@ impl HookWorker {
             let was_updated = before_oid.map(|o| o != after_oid.as_str()).unwrap_or(false);
             if is_new || was_updated {
                 tag_changes += 1;
+                changed_tag_names.push(tag.clone());
                 let before_oid = before_oid.map_or("0", |v| v).to_string();
                 let tag_name = tag.clone();
                 let h = tokio::spawn({
@@ -326,6 +334,51 @@ impl HookWorker {
         counter!("hook_sync_branches_changed_total").increment(branch_changes);
         counter!("hook_sync_tags_changed_total").increment(tag_changes);
 
+        // Embed changed tags into Qdrant for semantic search (non-blocking, fire-and-forget)
+        if let Some(ref embed) = self.embed_service {
+            if !changed_tag_names.is_empty() {
+                let es = embed.clone();
+                let db = self.db.clone();
+                let repo_uuid = repo_uuid;
+                let repo_name = repo_name.clone();
+                let project_id = project.to_string();
+                let tag_names = changed_tag_names.clone();
+                tokio::spawn(async move {
+                    let tags = repo_tag::Entity::find()
+                        .filter(repo_tag::Column::Repo.eq(repo_uuid))
+                        .filter(repo_tag::Column::Name.is_in(tag_names))
+                        .all(db.reader())
+                        .await;
+
+                    match tags {
+                        Ok(rows) => {
+                            let count = rows.len();
+                            let inputs: Vec<TagEmbedInput> = rows
+                                .into_iter()
+                                .map(|t| TagEmbedInput {
+                                    repo_id: repo_uuid.to_string(),
+                                    repo_name: repo_name.clone(),
+                                    project_id: project_id.clone(),
+                                    name: t.name,
+                                    description: t.description,
+                                })
+                                .collect();
+                            if !inputs.is_empty() {
+                                if let Err(e) = es.embed_tags_batch(inputs).await {
+                                    tracing::warn!(error = %e, "failed to embed changed tags");
+                                } else {
+                                    tracing::debug!(count, "embedded changed tags into Qdrant");
+                                }
+                            }
+                        }
+                        Err(e) => {
+                            tracing::warn!(error = %e, "failed to query changed tags for embedding");
+                        }
+                    }
+                });
+            }
+        }
+
         Ok(())
     }
 

libs/git/http/mod.rs

@@ -118,14 +118,12 @@ pub async fn run_http(config: AppConfig) -> anyhow::Result<()> {
     let app_cache = app_cache?;
 
     let redis_pool = app_cache.redis_pool().clone();
-    let hook = HookService::new(
+    let _hook = HookService::new(
         db.clone(),
         app_cache.clone(),
         redis_pool.clone(),
         config.clone(),
     );
-    let _worker_cancel = hook.start_worker();
-    tracing::info!("hook worker started");
 
     let sync = crate::ssh::ReceiveSyncService::new(redis_pool.clone());
 

libs/git/ssh/mod.rs

@@ -279,15 +279,12 @@ pub async fn run_ssh(config: AppConfig) -> anyhow::Result<()> {
     let cache = AppCache::init(&config).await?;
     let redis_pool = cache.redis_pool().clone();
 
-    // Start the hook worker (Redis queue consumer)
-    let hook = crate::hook::HookService::new(
+    let _hook = crate::hook::HookService::new(
         db.clone(),
         cache.clone(),
         redis_pool.clone(),
         config.clone(),
     );
-    let _worker_cancel = hook.start_worker();
-    tracing::info!("hook worker started");
 
     SSHHandle::new(db, config.clone(), cache, redis_pool)
         .run_ssh()