Migrate hook observation to runtime events and update the process hook notification protocol. Add runtime event publication for message bus failures, channel lifecycle/outbound flow, gateway reloads, MCP server state, and MCP tool calls.
Validation: go test ./pkg/events/... ./pkg/bus ./pkg/agent ./pkg/channels ./pkg/mcp ./pkg/tools/integration ./pkg/gateway; make lint
Introduce pkg/events with filtered channels, subscription policies, backpressure, and stats. Wire AgentLoop to dual-publish legacy agent events into runtime events while preserving old event APIs.
Validation: go test ./pkg/events/... ./pkg/agent; go test -race ./pkg/events/...; make lint
- Add PrettyPrint and DisableEscapeHTML config options to ToolFeedbackConfig
- Add FormatArgsJSON helper function with configurable pretty printing and HTML escaping
- Add toolFeedbackArgsPreviewWithOptions to pass formatting options
- Update pipeline_execute.go to use new formatting options for tool feedback
This fixes the issue where '&&' would be displayed as '\u0026' in tool
feedback messages and provides optional pretty-printing for better
readability.
- Add isNetworkError detection for connection reset, broken pipe, read/write tcp, EOF
- Add retry logic with configurable exponential backoff for network errors
- Add config options max_llm_retries and llm_retry_backoff_secs in agents.defaults
- Network errors now retry with backoff (was previously not retried)
- Timeout errors now use configurable backoff instead of hardcoded 5s
- Default: 2 retries with 2s backoff (3 total attempts)
Resolves conflicts after the agent loop refactor on main:
- pkg/agent/loop.go was deleted upstream (logic split into agent.go,
agent_init.go, pipeline.go, etc.); accepted the deletion.
- Moved the delegate tool registration block from the old loop.go
into registerSharedTools in pkg/agent/agent_init.go, immediately
after the spawn/spawn_status block. Logic and gating
(len(registry.ListAgentIDs()) > 1) are unchanged.
- pkg/agent/subturn.go and pkg/agent/subturn_test.go merged cleanly
on their own; TargetAgentID field, validation, registry lookup,
and tests all preserved.
Verified locally:
- go build ./pkg/agent/... ./pkg/tools/... clean
- go vet clean
- TestDelegateTool* (17 cases) pass
- TestSpawnSubTurn_TargetAgentID_* (3 cases) pass
- TestDelegateToolRegistered_MultiAgent / _SingleAgent pass
- full pkg/agent + pkg/tools test suites green
- centralize web search provider readiness and resolution logic
- fall back when the configured provider is unavailable or invalid
- allow native-search-capable models to use built-in search without the client tool
- simplify the tools page and add direct access to web search settings
- add backend, agent, and integration tests for the new selection behavior
* refactor: support explicit model list providers
* fix(web): preserve explicit model providers
* fix(web): preserve legacy provider prefixes on model updates
fix(models): normalize explicit provider-prefixed ids
fix(api): preserve legacy model updates across providers
fix(agent): preserve config identity for explicit provider refs
* fix ci
* feat(web): download attachments in frontend
* fix: proxy pico media and force svg downloads
* feat(web): hide ephemeral media refs from persisted session history
Add a context window usage indicator to the web chat UI and a /context
slash command that works across all channels.
Backend:
- Add computeContextUsage() estimating history + system + tool tokens
- Attach ContextUsage to outbound messages via the pico WebSocket protocol
- Add /context command showing context stats as formatted text
- Add EstimateSystemTokens() on ContextBuilder for system prompt estimation
Frontend:
- Add ContextUsageRing component (SVG ring + hover/tap popover)
- Show usage percentage, token counts, and compression threshold
- Hover on desktop (150ms leave delay), tap on mobile
- "View Details" sends /context with 1s cooldown
- i18n support (en/zh) for popover labels
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Replace generic mockProvider with modelRecordingProvider that captures
the model parameter passed to Chat(). After delegation from alpha to
beta, assert the recorded model is "model-beta" — proving the child
turn actually ran with the target agent's configuration, not the
caller's.
Also add wiring tests:
- TestDelegateToolNotRegistered_SingleAgent: single-agent has no
delegate in its tool registry
- TestDelegateToolRegistered_MultiAgent: both agents in a two-agent
setup have the delegate tool
Ref: #2148
Remove the IsToolEnabled("delegate") check — there is no "delegate"
entry in ToolsConfig, so the check was always true. The only real
gate is len(agents) > 1, which is the intended behavior: delegate
is auto-registered in multi-agent setups.
Ref: #2148
Register the delegate tool in registerSharedTools when multiple agents
are configured. Gated independently from the subagent tool — delegate
uses SubTurn directly and does not depend on SubagentManager.
Self-delegation is prevented by injecting the current agent ID.
Permission is enforced via CanSpawnSubagent (reuses allow_agents config).
Single-agent setups are unaffected: the tool is not registered when
only one agent exists in the registry.
Ref: #2148
Add multi-agent test setup (newMultiAgentLoop) with two agents using
distinct models (model-alpha, model-beta).
Three new tests:
- UsesTargetAgent: parent=alpha delegates to beta, event log confirms
child runs as agent_id=beta with model=model-beta
- NotFound: TargetAgentID pointing to nonexistent agent returns error
- EmptyModelAccepted: empty Model field accepted when TargetAgentID
provides the model implicitly
Ref: #2148
When TargetAgentID is set, spawnSubTurn resolves the target AgentInstance
from the registry and uses it as the base for the child turn. This gives
the child turn the target's workspace, model, tools, and system prompt
instead of inheriting from the caller.
Model validation is relaxed: empty Model is accepted when TargetAgentID
provides the model implicitly via the resolved agent instance.
Ref: #2148
Scope tool result deduplication to each assistant tool-call block so providers
that reuse call IDs across separate turns do not lose valid tool results. Also
drop invalid empty tool call IDs and orphaned tool messages after validation.
Hoshina