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# Release Notes
**Release Date:** February 18, 2026
**Tag:** v0.5.1
## The Hive Gets a Brain
v0.5.1 is our most ambitious release yet. Hive agents can now **build other agents** -- the new Hive Coder meta-agent writes, tests, and fixes agent packages from natural language. The runtime grows multi-graph support so one session can orchestrate multiple agents simultaneously. The TUI gets a complete overhaul with an in-app agent picker, live streaming, and seamless escalation to the Coder. And we're now provider-agnostic: Claude Code subscriptions, OpenAI-compatible endpoints, and any LiteLLM-supported model work out of the box.
---
## Highlights
### Hive Coder -- The Agent That Builds Agents
A native meta-agent that lives inside the framework at `core/framework/agents/hive_coder/`. Give it a natural-language specification and it produces a complete agent package -- goal definition, node prompts, edge routing, MCP tool wiring, tests, and all boilerplate files.
```bash
# Launch the Coder directly
hive code
# Or escalate from any running agent (TUI)
Ctrl+E # or /coder in chat
```
The Coder ships with:
- **Reference documentation** -- anti-patterns, construction guide, and design patterns baked into its system prompt
- **Guardian watchdog** -- an event-driven monitor that catches agent failures and triggers automatic remediation
- **Coder Tools MCP server** -- file I/O, fuzzy-match editing, git snapshots, and sandboxed shell execution (`tools/coder_tools_server.py`)
- **Test generation** -- structural tests for forever-alive agents that don't hang on `runner.run()`
### Multi-Graph Agent Runtime
`AgentRuntime` now supports loading, managing, and switching between multiple agent graphs within a single session. Six new lifecycle tools give agents (and the TUI) full control:
```python
# Load a second agent into the runtime
await runtime.add_graph("exports/deep_research_agent")
# Tools available to agents:
# load_agent, unload_agent, start_agent, restart_agent, list_agents, get_user_presence
```
The Hive Coder uses multi-graph internally -- when you escalate from a worker agent, the Coder loads as a separate graph while the worker stays alive in the background.
### TUI Revamp
The Terminal UI gets a ground-up rebuild with five major additions:
- **Agent Picker** (Ctrl+A) -- tabbed modal screen for browsing Your Agents, Framework agents, and Examples with metadata badges (node count, tool count, session count, tags)
- **Runtime-optional startup** -- TUI launches without a pre-loaded agent, showing the picker on first open
- **Live streaming pane** -- dedicated RichLog widget shows LLM tokens as they arrive, replacing the old one-token-per-line display
- **PDF attachments** -- `/attach` and `/detach` commands with native OS file dialog (macOS, Linux, Windows)
- **Multi-graph commands** -- `/graphs`, `/graph <id>`, `/load <path>`, `/unload <id>` for managing agent graphs in-session
### Provider-Agnostic LLM Support
Hive is no longer Anthropic-only. v0.5.1 adds first-class support for:
- **Claude Code subscriptions** -- `use_claude_code_subscription: true` in `~/.hive/configuration.json` reads OAuth tokens from `~/.claude/.credentials.json` with automatic refresh
- **OpenAI-compatible endpoints** -- `api_base` config routes traffic through any compatible API (Azure OpenAI, vLLM, Ollama, etc.)
- **Any LiteLLM model** -- `RuntimeConfig` now passes `api_key`, `api_base`, and `extra_kwargs` through to LiteLLM
The quickstart script auto-detects Claude Code subscriptions and ZAI Code installations.
---
## What's New
### Architecture & Runtime
- **Hive Coder meta-agent** -- Natural-language agent builder with reference docs, guardian watchdog, and `hive code` CLI command. (@TimothyZhang7)
- **Multi-graph agent sessions** -- `add_graph`/`remove_graph` on AgentRuntime with 6 lifecycle tools (`load_agent`, `unload_agent`, `start_agent`, `restart_agent`, `list_agents`, `get_user_presence`). (@TimothyZhang7)
- **Claude Code subscription support** -- OAuth token refresh via `use_claude_code_subscription` config, auto-detection in quickstart, LiteLLM header patching. (@TimothyZhang7)
- **OpenAI-compatible endpoint support** -- `api_base` and `extra_kwargs` in `RuntimeConfig` for any OpenAI-compatible API. (@TimothyZhang7)
- **Remove deprecated node types** -- Delete `FlexibleGraphExecutor`, `WorkerNode`, `HybridJudge`, `CodeSandbox`, `Plan`, `FunctionNode`, `LLMNode`, `RouterNode`. Deprecated types (`llm_tool_use`, `llm_generate`, `function`, `router`, `human_input`) now raise `RuntimeError` with migration guidance. (@TimothyZhang7)
- **Interactive credential setup** -- Guided `CredentialSetupSession` with health checks and encrypted storage, accessible via `hive setup-credentials` or automatic prompting on credential errors. (@RichardTang-Aden)
- **Pre-start confirmation prompt** -- Interactive prompt before agent execution allowing credential updates or abort. (@RichardTang-Aden)
- **Event bus multi-graph support** -- `graph_id` on events, `filter_graph` on subscriptions, `ESCALATION_REQUESTED` event type, `exclude_own_graph` filter. (@TimothyZhang7)
### TUI Improvements
- **In-app agent picker** (Ctrl+A) -- Tabbed modal for browsing agents with metadata badges (nodes, tools, sessions, tags). (@TimothyZhang7)
- **Runtime-optional TUI startup** -- Launches without a pre-loaded agent, shows agent picker on startup. (@TimothyZhang7)
- **Hive Coder escalation** (Ctrl+E) -- Escalate to Hive Coder and return; also available via `/coder` and `/back` chat commands. (@TimothyZhang7)
- **PDF attachment support** -- `/attach` and `/detach` commands with native OS file dialog. (@TimothyZhang7)
- **Streaming output pane** -- Dedicated RichLog widget for live LLM token streaming. (@TimothyZhang7)
- **Multi-graph TUI commands** -- `/graphs`, `/graph <id>`, `/load <path>`, `/unload <id>`. (@TimothyZhang7)
- **Agent Guardian watchdog** -- Event-driven monitor that catches secondary agent failures and triggers automatic remediation, with `--no-guardian` CLI flag. (@TimothyZhang7)
### New Tool Integrations
| Tool | Description | Contributor |
| ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------ |
| **Discord** | 4 MCP tools (`discord_list_guilds`, `discord_list_channels`, `discord_send_message`, `discord_get_messages`) with rate-limit retry and channel filtering | @mishrapravin114 |
| **Exa Search API** | 4 AI-powered search tools (`exa_search`, `exa_find_similar`, `exa_get_contents`, `exa_answer`) with neural/keyword search, domain filters, and citation-backed answers | @JeetKaria06 |
| **Razorpay** | 6 payment processing tools for payments, invoices, payment links, and refunds with HTTP Basic Auth | @shivamshahi07 |
| **Google Docs** | Document creation, reading, and editing with OAuth credential support | @haliaeetusvocifer |
| **Gmail enhancements** | Expanded mail operations for inbox management | @bryanadenhq |
### Infrastructure
- **Default node type → `event_loop`** -- `NodeSpec.node_type` defaults to `"event_loop"` instead of `"llm_tool_use"`. (@TimothyZhang7)
- **Default `max_node_visits` → 0 (unlimited)** -- Nodes default to unlimited visits, reducing friction for feedback loops and forever-alive agents. (@TimothyZhang7)
- **Remove `function` field from NodeSpec** -- Follows deprecation of `FunctionNode`. (@TimothyZhang7)
- **LiteLLM OAuth patch** -- Correct header construction for OAuth tokens (remove `x-api-key` when Bearer token is present). (@TimothyZhang7)
- **Orchestrator config centralization** -- Reads `api_key`, `api_base`, `extra_kwargs` from centralized `~/.hive/configuration.json`. (@TimothyZhang7)
- **System prompt datetime injection** -- All system prompts now include current date/time for time-aware agent behavior. (@TimothyZhang7)
- **Utils module exports** -- Proper `__init__.py` exports for the utils module. (@Siddharth2624)
- **Increased default max_tokens** -- Opus 4.6 defaults to 32768, Sonnet 4.5 to 16384 (up from 8192). (@TimothyZhang7)
---
## Bug Fixes
- Flush WIP accumulator outputs on cancel/failure so edge conditions see correct values on resume
- Stall detection state preserved across resume (no more resets on checkpoint restore)
- Skip client-facing blocking for event-triggered executions (timer/webhook)
- Executor retry override scoped to actual EventLoopNode instances only
- Add `_awaiting_input` flag to EventLoopNode to prevent input injection race conditions
- Fix TUI streaming display (tokens no longer appear one-per-line)
- Fix `_return_from_escalation` crash when ChatRepl widgets not yet mounted
- Fix tools registration problems for Google Docs credentials (@RichardTang-Aden)
- Fix email agent version conflicts (@RichardTang-Aden)
- Fix coder tool timeouts (120s for tests, 300s cap for commands)
## Documentation
- Clarify installation and prevent root pip install misuse (@paarths-collab)
---
## Agent Updates
- **Email Inbox Management** -- Consolidate `gmail_inbox_guardian` and `inbox_management` into a single unified agent with updated prompts and config. (@RichardTang-Aden, @bryanadenhq)
- **Job Hunter** -- Updated node prompts, config, and agent metadata; added PDF resume selection. (@bryanadenhq)
- **Deep Research Agent** -- Revised node implementations with updated prompts and output handling.
- **Tech News Reporter** -- Revised node prompts for improved output quality.
- **Vulnerability Assessment** -- Expanded prompts with more detailed assessment instructions. (@bryanadenhq)
---
## Breaking Changes
- **Deprecated node types raise `RuntimeError`** -- `llm_tool_use`, `llm_generate`, `function`, `router`, `human_input` now fail instead of warning. Migrate to `event_loop`.
- **`NodeSpec.node_type` defaults to `"event_loop"`** (was `"llm_tool_use"`)
- **`NodeSpec.max_node_visits` defaults to `0` / unlimited** (was `1`)
- **`NodeSpec.function` field removed** -- `FunctionNode` is deleted; use event_loop nodes with tools instead.
---
## Community Contributors
A huge thank you to everyone who contributed to this release:
- **Richard Tang** (@RichardTang-Aden) -- Interactive credential setup, pre-start confirmation, email agent consolidation, tool registration fixes, lint and formatting
- **Pravin Mishra** (@mishrapravin114) -- Discord integration with 4 MCP tools
- **Jeet Karia** (@JeetKaria06) -- Exa Search API integration with 4 AI-powered search tools
- **Shivam Shahi** (@shivamshahi07) -- Razorpay payment processing integration
- **Siddharth Varshney** (@Siddharth2624) -- Utils module exports
- **@haliaeetusvocifer** -- Google Docs integration with OAuth support
- **Bryan** (@bryanadenhq) -- PDF selection, inbox agent fixes, Job Hunter and Vulnerability Assessment updates
- **@paarths-collab** -- Documentation improvements
---
## Upgrading
```bash
git pull origin main
uv sync
```
### Migration Guide
If your agents use deprecated node types, update them:
```python
# Before (v0.5.0) -- these now raise RuntimeError
NodeSpec(node_type="llm_tool_use", ...)
NodeSpec(node_type="function", function=my_func, ...)
# After (v0.5.1) -- use event_loop for everything
NodeSpec(node_type="event_loop", ...) # or just omit node_type (it's the default now)
```
If your agents set `max_node_visits=1` explicitly, they'll still work. The only change is the _default_ -- new agents without an explicit value now get unlimited visits.
To try the new Hive Coder:
```bash
# Launch Coder directly
hive code
# Or from TUI -- press Ctrl+E to escalate
hive tui
```
---
## What's Next
- **Agent-to-agent communication** -- one agent's output triggers another agent's entry point
- **Cost visibility** -- detailed runtime log of LLM costs per node and per session
- **Persistent webhook subscriptions** -- survive agent restarts without re-registering
- **Remote agent deployment** -- run agents as long-lived services with HTTP APIs
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