open_threads: new get_open_threads MCP tool on agent + manager surfaces

TODO.md

@@ -8,10 +8,8 @@
 - **Broadcast messaging**: allow sending messages with recipient "*" to all agents; deliver with hint "this was a broadcast and may not need any action from you"
 - **Multi-agent restart coordination**: when rebuilding all agents, manager should start first so it can coordinate post-restart confusion (notify agents, suppress unnecessary retries, etc)
 - **Shared docs/skills repo (RO)**: a single repo on the hive forge that every agent has read-only access to — common references, prompts, runbooks, "skills" the operator wants every agent to inherit without baking into the system prompt or `/shared`. Implementation likely: seed an `org-shared/docs` repo on first hive-forge boot, grant every per-agent user a read membership in the org. Agents `git clone` it (or use the API) to read; only the manager + operator can push.
-- **Loose-ends tracker + `get_open_threads` tool**: hive-c0re already knows about pending approvals + unanswered questions; soon will also know about open PRs on hive-forge. Aggregate these into a per-agent "open threads" view (e.g. `[{kind: "approval", id: 7, summary: "spawn alice"}, {kind: "question", id: 12, asker: "alice", summary: "deploy now?"}]`). New MCP tool `mcp__hyperhive__get_open_threads` returns the list so an agent can see what's still pending against it without rebuilding context from inbox history. Manager's version includes hive-wide threads. **Also surface this list on the per-agent web UI** so the operator can see at a glance what each agent has hanging open — same data source as the MCP tool, just rendered into the existing per-agent dashboard page (next to inbox view / model chip / etc).
-    - **Scope per agent X (confirmed with operator):** include BOTH (a) unanswered questions where `asker == X` (X is waiting on someone) AND (b) unanswered questions where `target == X` (X owes an answer). Distinguish via a `role: "asker" | "target"` field on the question variant so the agent can render "waiting on" vs "owe a reply" appropriately. Approvals: include rows where the submitter is X (waiting on the operator). Forge PRs (future): include open PRs where X is author OR reviewer.
-    - **Wire shape sketch:** new `AgentRequest::GetOpenThreads` / `ManagerRequest::GetOpenThreads` returning `Response::OpenThreads { threads: Vec<OpenThread> }` with `OpenThread` as a tagged enum (`{kind: "approval", id, summary, age_seconds}` / `{kind: "question", id, role, counterparty, summary, age_seconds}` / future `{kind: "pr", ...}`). Manager flavour returns hive-wide threads (no asker/target filter). MCP tool `get_open_threads` takes no args.
-    - **Aggregator location:** new helper on `Coordinator` (or a dedicated `open_threads.rs`) so both surfaces share the query logic; queries `approvals` + `operator_questions` tables with a single per-call sweep (no caching — call frequency is low).
+- ~~**Loose-ends tracker + `get_open_threads` tool**~~ ✓ landed — new `mcp__hyperhive__get_open_threads` MCP tool on both agent + manager surfaces. Wire types in `hive-sh4re`: `AgentRequest::GetOpenThreads` / `ManagerRequest::GetOpenThreads` → `OpenThreads { threads: Vec<OpenThread> }`. `OpenThread` is a tagged enum with `Approval { id, agent, commit_ref, description, age_seconds }` and `Question { id, asker, target, question, age_seconds }`. Shared aggregator at `hive-c0re/src/open_threads.rs`: `for_agent(coord, name)` (sub-agent surface; filters questions by asker == self OR target == self, approvals only for manager) and `hive_wide(coord)` (manager surface; everything pending in the swarm). No caching — fresh sqlite sweep per call. **Per-agent web UI rendering** is a follow-up below.
+    - **Follow-up: surface open-threads on the per-agent web UI** so the operator can see at a glance what each agent has hanging open — same data source as the MCP tool, just rendered into the existing per-agent dashboard page (next to inbox view / model chip / etc).
 
 ## Reminder Tool